Synthesis and investigation on growth and physiochemical properties of semi organic nonlinear optical crystal l glutamic acid zinc chloride

Synthesis and Investigation on growth and physiochemical properties of semi organic nonlinear optical crystal L Glutamic Acid Zinc Chloride Accepted Manuscript Title Synthesis and Investigation on gro[.]

Accepted Manuscript Title: Synthesis and Investigation on growth and physiochemical properties of semi-organic nonlinear optical crystal: L-Glutamic Acid Zinc Chloride Authors: S Chennakrishnan, S.M Ravikumar, C Shanthi, R Srineevasan, T Kubendiran, D Sivavishnu, M Packiyaraj PII: DOI: Reference: S1658-3655(17)30001-8 http://dx.doi.org/doi:10.1016/j.jtusci.2017.01.001 JTUSCI 346 To appear in: Received date: Revised date: Accepted date: 27-4-2016 30-11-2016 2-1-2017 Please cite this article as: S.Chennakrishnan, S.M.Ravikumar, C.Shanthi, R.Srineevasan, T.Kubendiran, D.Sivavishnu, M.Packiyaraj, Synthesis and Investigation on growth and physiochemical properties of semi-organic nonlinear optical crystal: L-Glutamic Acid Zinc Chloride, http://dx.doi.org/10.1016/j.jtusci.2017.01.001 This is a PDF file of an unedited manuscript that has been accepted for publication As a service to our customers we are providing this early version of the manuscript The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain 1 Synthesis and Investigation on growth and physiochemical properties of semi-organic nonlinear optical crystal: L-Glutamic Acid Zinc Chloride S Chennakrishnan1, S.M Ravikumar2*, C Shanthi2, R.Srineevasan2, T Kubendiran2, D Sivavishnu2, and M.Packiyaraj3 Department of physics, Idhaya Arts & science College for women, Tiruvannamalai 606 705 Department of physics, Government Arts College, Tiruvannamalai 606 603 Department of physics, S.K.P Engineering College, Tiruvannamalai 606 611 * Corresponding author: smravi78@rediffmail.com; ravism23@gmail.com Abstract The aim of this work is to synthesis, investigate the growth and physiochemical properties of nonlinear optical semi-organic crystal L-glutamic acid zinc chloride (LGAZC) Optically transparent and defect less crystal was grown by slow evaporation solution growth technique under optimized conditions The induction periods were measured at various supersaturations and hence the interfacial energies were evaluated Single crystal X-ray diffraction study reveals that the crystal is orthorhombic structure with space group P212121 and the calculated lattice parameters are a = 5.20 Å, b = 6.99 Å, c = 17.58 Å, α = β = γ = 90° and Volume = 623.411Å3 Spectroscopic properties were used to investigate by recording the Fourier transform infrared and optical transmission spectra The thermal decomposition of grown crystal was investigated by Thermo Gravimetric and Differential Thermal Analysis (TG/DTA) LGAZC crystal exhibits second harmonic generation (SHG) efficiency 1.5 times than that of inorganic KDP crystal The presence of the metal ion (Zn+) in a grown crystal was identified by EDAX spectrum analysis The photoconductivity study shows that LGAZC crystal has positive Photo conducting nature The dielectric response of the LGAZC crystal was investigated and reported Keywords Semi-organic nonlinear optical crystal; X-ray Diffraction; UV-vis-NIR; Thermal study 2 Introduction A new class of materials called semi-organic crystals has been investigated recently with interesting nonlinear optical properties and their stable physiochemical properties gains importance in device fabrication and applied research [1, 2] The main advantage as a increasing demand for new type of crystals in technological applications, bulk size growth of semi-organic crystals in all the three dimensions, made the growth process easy to cut and polish the samples for device fabrication [3] Possession of high nonlinearity, high resistance to laser inducing damage, low angular sensitivity and good mechanical hardness of semiorganic crystals property has been used potentially for combining high NLO property and chemical flexibility of organic materials with physical sturdiness and excellent transmittance of inorganic materials [4-7] Hence, ability of enhancing NLO property of semi-organic crystals is presently under deep investigation due to their incorporated advantages of both organic and inorganic crystals Many researchers pay their intense attention for finding the semi-organic family crystals using amino acid with inorganic or metal complexes for improving their quality and properties [8] Interestingly, amino acid based complexes have been attracted crystal researchers because of their suitability in mixing various inorganics and their crystallizing nature in crystal system favorable for nonlinear optical applications In addition, high NLO efficiency organic molecules combining approach with the favourable physical property of the inorganic materials has an active research in the last two decades Amino acids based on several semi-organic series crystals are crystallized recently and their various properties have been analysed [9-12] High nonlinear optical coefficients organic material combines with inorganic which exhibits excellent physical properties, gives semi-organic In this device grade, semi-organic as an acid base interaction, hydrogen bonding between organic cation and inorganic anion, gives strong mechanical and high thermal stability NLO crystals [13] High polarizable, acid base interaction of organic and inorganic molecules are responsible for NLO properties, linked through hydrogen bond network yields non-cetrosymmetric structural systems reported by Srineevasan et al (2013) [14] and Rajasekaran et al (2000) [15] Rich demand of semi-organic complexes in optical storage devices, colour display and optical communication system are available in literature [16] In semi-organic complexion, π electrons movement between donor and acceptor groups has also been reported [17] A series of semi-organic compounds such as L-Arginine phosphate [18], L-Arginine hydro bromide [19], L-Arginine hydrochloride [20], L-Histidine di hydrogen phosphate [21], L-Histidine tetra fluoroborate [22], Glycine hydrofluoride [23] and L-Glutamic hydrochloride [24] were showing good nonlinear optical property Due to excellent physiochemical properties of amino acid family crystals they are subjected to extensive investigation by many research scientists Particularly in the view of NLO applications organic amino acids crystals are interesting because they contain donor carboxylic (COOH) group and the proton acceptor (NH2) group known as zwitterions which creates hydrogen bonds This kind of dipolar nature of amino acids proved as an ideal candidate for NLO applications The literature reveals that the complex of amino acids with inorganic (metal) salts are promising NLO materials for optical applications, such as optical communication, optical computing, optical informatics processing, optical disk data storage, laser fusion reaction and laser remote sensing [25-27] Also the considerable effort is being made to find new materials that have the optimal characteristics needed for use as a nonlinear optical element [28-32] In recent years, tremendous efforts are given to the amino acids mixed with organic inorganic complex crystals, in order to improve the molecular engineering, chemical stability, laser damage threshold and optical properties (linear and nonlinear) Incorporating the LGlutamic acid in many semi-organic nonlinear optical materials have been recently crystallized and their structural, optical, thermal and electrical properties have been investigated [33-38] L-Glutamic acid is a phase matchable NLO material that has high transparency in the UV region [39] In this view, the present investigation deals with growth and characterization of L-Glutamic acid Zinc Chloride single crystal by slow evaporation solution growth technique and various nucleation parameters were determined The grown crystal was subjected to single crystal XRD, powder XRD, FT-IR, UV-Vis-NIR, SHG, TG/DTA, EDAX and Photoconducity studies Experimental procedures 2.1 Material Synthesis Commercially available L-Glutamic acid salt (AR grade, purity 99.8%) and Zinc chloride (AR grade purity 99.9%) were mixed with equimolar ratio (1:1) in a solvent of double distilled water at temperature 40 ºC The prepared solution was stirred well for about 10 hrs in order to obtain the homogenous solution The true chemical reaction of the title compound L-Glutamic acid Zinc chloride solution is shown below As grown L-glutamic acid zinc chloride crystal‟s molecular binding is shown in scheme 4 HO2CCH2CH2CH(NH2)CO2H+Zncl2 → Zn[HO2CCH2CH(NH2)CO2H]Cl2 L-Glutamic acid + Zinc chloride  L-Glutamic acid Zinc chloride Scheme Molecular structure of LGAZC crystal 2.2 Solubility Solubility determination is essential in solution growth technique, since amount of solute in the solvent dictates the size of the crystal in growth process Hence, the solubility of the synthesised L-Glutamic acid Zinc chloride salt in double distilled water was determined by gravimetric method This synthesized LGAZC solution was taken in an airtight container and kept at a constant temperature with continuous stirring (8hr) in a digitally controlled fullvisibility constant temperature bath with temperature accuracy ±0.01 ºC After attaining the saturation, the equilibrium concentration of the solute is analysed graviometrically The solubility of LGAZC functions at seven different temperatures from 30 to 60 ºC was determined and the plot has been drawn as Temperature Vs Concentration shown in figure From the plot, we observed that LGAZC has a positive temperature coefficient of solubility The increasing of solubility is due to the function of temperature and increasing of temperature (heat energy) breaks the bonds in to solids facilitating the dissolving reaction Figure Solubility curve for LGAZC 2.3 Nucleation Parameters The nucleation parameters of LGAZC were evaluated The induction period of LGAZC recorded for different supersaturation ratios of 1.16, 1.20, 1.24, 1.28 and 1.32 The function of induction period versus supersatureation ratio is shown in the figure The study of induction period at different supersaturation levels gives an idea of the optimized induction period to have controlled nucleation rate to facilitate the growth of bulk size single crystals Experimental observations reveal that the induction period of LGAZC decreases as the supersaturation of the solution increases, hence the nucleation rate increases The change in the Gibbs free energy (ΔG) between the crystalline phase and the surrounding mother solution results in a driving force, which stimulates crystallization According to classical nucleation theory the free energy required to form a spherical nucleus is given by ΔG = (4/3) πr3 ΔGV + 4πr3γ, where, ΔGV is the energy change per unit volume, r is the radius of the nucleus and γ is the interfacial energy The nucleation parameters such as, ΔGV, γ and critical nucleus (r*) are calculated by using the well known formulate [40, 41] and the same are presented in Table It is observed from the table that the nucleation rate increases with supersaturation ratio, which means the formation of higher number of nuclei with increased supersaturation The free energy barriers for formation of critical nucleus size decreased with increasing supersaturation ratio The nuclei will become stable and grow faster if the energy barrier is reduced at high supersaturation ratios The interfacial tension of LGAZC was estimated as 1.2563 mJ/m2 from the slope of ln τ and (ln S)-2 curve [42] (Figure 3) From the figure and 5, we observed that the ΔG and r decreases with increasing supersaturation 1000 Time 900 Induction Period () 800 700 600 500 400 300 200 100 1.14 1.16 1.18 1.20 1.22 1.24 1.26 1.28 1.30 1.32 1.34 Supersaturation Ratio (S) Figure Variation of induction period with supersaturation for LGAZC crystal 7.0 6.8 6.6 6.4 ln () 6.2 6.0 5.8 5.6 5.4 5.2 5.0 10 15 20 25 30 35 1/(lnS) 40 45 50 Figure Plot of 1/ ln S2 versus ln  for LGAZC crystal 4.0 G (kJ mole-1) 3.5 3.0 2.5 2.0 1.5 1.0 1.14 1.16 1.18 1.20 1.22 1.24 1.26 1.28 1.30 1.32 1.34 Supersaturation Ratio (S) Figure Variation of energy of formation of critical nucleus with supersaturation for LGAZC crystal 120 110 r (nm) 100 90 80 70 60 1.14 1.16 1.18 1.20 1.22 1.24 1.26 1.28 1.30 1.32 1.34 Supersaturation Ratio (S) Figure Variation of critical nucleus size with supersaturation for LGAZC crystal Table Nucleation Parameters of LGAZC crystal Crystal Supersaturation S Induction Interfacial period  tension () sec mJm-2 ΔG r nm kJ/mole 1.16 855 3.936 111.414 1.20 520 2.608 90.696 LGAZC 1.24 397 1.870 76.866 1.28 339 1.422 66.993 1.32 299 1.124 59.560 1.2563 2.4 Growth of LGAZC crystal In accordance with the solubility data, the saturated solution of L-Glutamic acid Zinc chloride was prepared using double distilled water The solution was continuously stirred for 10 hours to avoid co-precipitation of multiple phases The stirred saturated solution was filtered using high quality Whattman filter paper and kept in an undisturbed place for evaporation at room temperature In a period of 50-70 days, seed crystals of LGAZC were formed due to spontaneous nucleation Optically good quality tiny crystal with perfect shape was selected as a seed to grow bulk size crystal Crystal having dimension upto 18x3x2 mm3 was harvested in a period of 75 to 120 days As grown crystal of LGAZC is shown in figure and the crystal has a needle shape with good transparency, defect free and no inclusion Figure As grown crystal of LGAZC crystal Result and Discussion 3.1 Single crystal X-ray Diffraction Analysis The grown L-Glutamic Acid Zinc Chloride crystal has been subjected to single crystal X- ray diffraction study using an ENRAF NONIUS CAD4 diffractometer with MoKα radiation (λ=0.71073 A˚ ) to determine the unit cell parameters It is observed from the single crystal XRD study that LGAZC crystal belongs to orthorhombic crystal system The calculated lattice parameter of L-glutamic acid zinc chloride crystal is compared with pure Lglutamic acid crystal and details are given in table From the observation, there is a slight variations in the lattice parameters of LGAZC crystal which may be attributed by the presence of zinc chloride in the L-glutamic acid and whereas the structure of the L-glutamic acid was not be changed Table Crystal data of Pure L-glutamic acid and L-glutamic acid zinc single crystal a (Å) b(Å) c (Å) α=β=γ Crystal System Space group Volume (Å3) Pure L-glutamic acid L-glutamic acid zinc crystal [43] chloride (LGAZC) crystal a = 5.17 b =6.95 c =17.35 90º Orthorhombic P212121 623.411 a = 5.20 b = 6.99 c = 17.58 90º Orthorhombic P212121 638.997 3.2 Powder X-ray Diffraction Analysis The powder sample of grown LGAZC was subjected to power X-ray diffraction study to confirm its crystalline nature and structure The recorded powder XRD pattern of the LGAZC crystal is shown in the figure The well defined Bragg‟s peaks were observed at specific 2θ angles (10º- 80º) shows high crystalline of LGAZC The measurement of lattice parameters from powder XRD pattern and peak indexing carried out using the software Proski version 2.The measured cell parameters from single crystal XRD is agreed well with powder XRD and results are compared in table 9 Figure Powder X-ray diffraction analysis of LGAZC crystal Table Unit cell parameters of LGAZC crystal Parameters Single crystal XRD Powder XRD a (Å) 5.20 5.20 b(Å) 6.99 6.99 c(Å) 17.58 17.58 α =β = γ 90º 90º V (Å3) 638.997 638.997 3.3 Fourier Transform Infrared Spectroscopic study Infrared spectrum is an important record, which provides more information about the functional group of a compound In this technique almost all functional groups, in a molecule absorb characteristically within definite range of frequency [44-46] The absorption of IR radiation causes the various bonds in a molecule to stretch and bend with respect to one another The most important range (4000-500 cm-1) is of prime importance for the study of an organic and semi-organic compound by spectral analysis [47-48] The FTIR spectrum LGAZC is shown in figure The peak observed at 3011 cm-1 corresponding to N-H stretching C-H and O-H bending vibration modes shows absorption peaks at 2950 cm-1 and 1498 cm-1 respectively The CO stretching vibration shows an absorption peak at 1304 cm-1 to 1043 cm-1 The COO plane deformation shows an absorption peak at 702 cm-1 The 10 presence of ZnCl2 in the FTIR spectrum is far below in the finger print region of the FTIR which may be the range 300-500 cm-1 The more functional group assignments of LGAZC 3500 C:\Program Files\OPUS_65\MEAS\K.J.1 3000 K.J 2500 2000 Wavenumber cm-1 1500 702.63 666.97 941.11 908.66 860.86 798.84 1043.77 1149.78 1411.26 1344.21 1304.18 1248.67 1498.32 1636.63 3011.39 2950.00 80 Transmittance [%] 85 90 95 crystal are given in table 1000 Instrument type and / or accessory 06/02/2015 Figure FTIR spectrum of LGAZC crystal Page 1/1 Table FTIR functional group assignments of the grown LGAZC crystal Wave number (Cm-1) Assignment L-Glutamic acid L –Glutamic Acid Zinc Chloride 3150 3011 N-H Stretching 3400 -2400 2950 O-H Stretching 1640 -1550 1636 N-H Stretching 1465 1498 C-H Bending 1417 1411 O-H Plane 1361 1344 C-C-H in Plane deformation 1300 -1000 1304-1043 951 941 CH2 Rocking 930 908 O-H Bending 871 860 C-C Stretching 812 798 O-H in Plane deformation 705 702 COO- in Plane deformation 538 666 COO- Wagging C-O Stretching 11 3.4 Linear optical studies The analysing, linear optical property of NLO crystals by Transmission/Absorption studies is most important because NLO crystals can be used for device application purpose when it has a wider transparency window in the entire visible region and low cut-off wavelength Therefore, polished and suitable dimension of LGAZC crystal was subjected to optical transmission study The observed transmission spectrum of LGAZC crystal is shown in figure From the spectrum, it is evident that the LGAZC crystal has a very low UV cutoff wavelength of 240 nm along with large transmission window in the entire visible region Also, the absence of absorption at the range of 240-1100 nm indicates that crystal has good optical transmission with lesser defects An UV cutoff wavelength of LGAZC crystal is compared with a novel semiorganic nonlinear optical crystal dichloro bis(L-proline) zinc II (cutoff wavelength 230 nm) [28] which shows that the grown crystal is highly suitable for nonlinear optical applications Hence, the better linear optical property of grown sample may [49] utilised for optoelectronic and photonic device applications The optical band gap (Eg) of the grown crystal LGAZC was estimated by using Tauc‟s relation α.hυ = A (hυ Eg) n Where A is a constant for different transition, n is an index which assume values ½, 3/2, and depending on the nature of electronic transition The value of band gap (Eg) can be estimated by plot (α.hυ)2 versus photon incident energy (hυ) in figure 10 The estimated Eg value is 5.4 eV This higher value of band gap may lead the crystal in more optical conductivity without absorption of optical photon in specific range of wavelength This indicates that the material possesses the dielectric nature Particularly, the range of energies in UV-Vis-NIR is eV to eV, which is not suitable for exciting the electron from valence band to conduction band Hence, the incident photon was not absorbed by the material in the region UV-Vis-NIR range Therefore materials were capable for transmitting the light of wavelength in the range 240 to 1100 nm The sufficient transmitting power by material may lead the material into NLO activity when it has higher optical band gap 12 Figure Transmission Spectrum of LGAZC crystal Figure 10 Tauc’s plot of LGAZC crystal 3.5 TG/DTA analysis The Thermo Gravimetric Analysis (TGA) and Differential Thermal Analysis (DTA) were carried out for the grown crystal LGAZC using Q 500 V20.10 Build 36 thermal analyser at a temperature range of 50-550 °C in nitrogen atmosphere at a heating rate of 20 °C per minute The thermogram and differential thermogravimetric traces are shown in figure 11 It is observed from DTA curve, the material exhibits single sharp weight loss at 219.9 °C Observed no weight loss from ambient temperature to 219.9 indicates the grown LGAZC crystal is totally devoid of any inclusion of solvent and also indicating that the LGAZC crystal is stable upto 219.9 °C At this decomposition stage, 15.5 % weight loss was observed from the thermogravimetric (TG) analysis Elevated thermal stability of L-glutamic acid zinc 13 chloride crystal is compared with other nonlinear optical crystals and the corresponding decomposition temperature (thermal stability) values are shown in the table Hence, it is evident that the grown LGAZC crystal can be used for optoelectronic and photonic device fabrication up to a temperature of 219.9 °C 100.0 140.0 90.0 84.5% 120.0 80.0 100.0 70.0 80.0 60.0 50.0 40.0 TG % DTA uV 60.0 40.0 20.0 30.0 0.0 20.0 -20.0 -40.0 10.0 -60.0 50.0 100.0 150.0 219.9Cel -51.0uV 200.0 250.0 300.0 Temp Cel 350.0 400.0 450.0 500.0 0.0 550.0 Figure 11 Thermogravimetry Analysis / Differential Thermal analysis of LGAZC Table Comparision of thermal stability with LGAZC S.No Sample Thermal stability L-Glutamic acid hydrochloride [50] 155 °C L-Glutamic acid doped KDP [51] L-Glutamic acid hydrocholoride [52] 150 °C 190.4 °C L-Glutamic acid hydrochloride [53] 185 °C L-Glutamic acid hydrobromide [54] 218 °C L-Glutamic acid hydrobromide [55] 200.8 °C Benzophenone hydrazone [31] 104°C 2-amino-4-picolinium toluene sulfonate [32] 200 °C * L-Glutamic acid Zinc chloride *Present work 219.9 °C 14 3.6 Nonlinear optical study The strength of SHG efficiency of LGAZC crystal was determined as per the principle of Kurtz and Perry technique [56] The test was carried out by passing the ND: YAG Quanta laser (wavelength λ=1064 nm and 8ns laser pulse width) to the fine powdered form of grown crystal The schematic experimental arrangement of Kurtz-Perry technique is shown in the figure 12 For SHG efficiency measurement, we have used microcrystalline KDP as the reference material for comparison Laser radiation of wavelength was allowed to fall on the grown sample, the emitted green radiation from the sample confirms the SHG efficiency By analyzing the SHG output from the sample, the output power is found to be 13.26 mJ This output power was compared with KDP standard output (8.8mJ) and SHG efficiency of LGAZC crystal was found 1.5 times than that of KDP Also, the powder SHG efficiency of grown crystal has efficiency equivalent to novel metal-organic single crystal dibromobis (L-proline) zinc (II) [29] Hence, this result strongly suggests that the title compound as a potential candidate for SHG applications Figure 12 Experimental arrangement of Kurtz-Perry technique 3.7 EDAX The elemental analysis of grown crystal was performed using the Oxford INCA Energy Dispersive Atomic X-ray Fluorescence Spectrometer (EDAX) From the analysis, it was observed that one mole percentage of Zinc has been incorporated into the grown crystal of L-Glutamic acid Zinc chloride The observed EDAX spectrum of grown crystal is shown in the figure 13 It is observed that the element of Zinc was traced by EDAX analysis 15 Figure 13 EDAX spectrum of grown crystal LGAZC 3.8 Photoconductivity studies The photoconductivity studies on the grown LGAZC crystal was carried out by connecting the sample in series with a dc power supply and a picoammeter (Keithley 480) at the room temperature The dark current of the grown crystals was recorded for applied field voltage of 20–220V in steps of 20V The photo current was also recorded by exposing the sample to a halogen lamp (100W) containing iodine vapour for the same applied field The variation of photo current (Ip) and dark current (Id) with applied field is shown in Figure 14 Both the photocurrent and dark current of LGAZC crystal increase linearly with applied field It is observed from the plot that the dark current is less than photo current, thus suggesting that LGAZC exhibits positive photoconductivity In general positive photoconductivity is attributed to generation of mobile charge carriers caused by the absorption of photons [57] 60 Id (dark current) Iph (photo current) 50 Current (nA) 40 30 20 10 0 50 100 150 200 Electric Field (V/cm) Figure 14 Field dependent conductivity of LGAZC crystal 16 3.9 Dielectric Studies Figure 15 and 16 shows the variation of dielectric constant and the dielectric loss of LGAZC crystal as a function of frequency at different temperatures (308 K, 328 K, 348 K and 368 K) In the case of pure LGAZC (Figure 11), the dielectric constant is found to be 1367.4 at 100 Hz and it decreases to 394.0 at MHz The variation in the value of r is small in the frequency range 30 KHz - MHz In addition, both the dielectric constant and dielectric loss increase with increasing temperature The high value of dielectric constant at low frequencies indicates that there is contribution from all four known sources of polarizations [58], but in the high frequency region, dielectric constant almost become constant Dielectric constant decreases for high frequencies because of contributions of electric polarization [59] It is evident from Figure 16 that the crystals have a very low dielectric loss in the high frequency region, which indicates the lesser number of defects/impurities in the crystal 160 308 K 328 K 348 K 368 K Dielectric constant ( r ) 140 120 100 80 60 40 log f Figure 15 Variation of dielectric constant with log frequency at different temperatures for LGAZC single crystal 17 2.5 308 328 348 368 2.0 Dielectric loss 1.5 K K K K 1.0 0.5 0.0 -0.5 log f Figure 16 Variation of dielectric loss with log frequency at different temperatures for LGAZC single crystal Conclusion The good quality nonlinear optical semi-organic single crystal of LGAZC have been successfully synthesized and the crystal have been grown by slow evaporation technique using double distilled water as the solvent The nucleation parameters of LGAZC crystal was studied at different supersaturation ratios The induction time for nucleation of BTCF is found to decrease with increase in supersaturation ratio Unit cell structure of the grown crystal was confirmed by single crystal XRD analysis and it shows that the crystal belongs to orthorhombic crystal system The good crystalline nature of the LGAZC was confirmed from the well-defined peaks in the powder X-ray diffraction patterns The functional groups present in the grown crystal were confirmed by FTIR spectroscopy Optical behaviours was studied by using UV-Vis-NIR analysis and found that there is no absorbance between 2401100 nm and the transmission is 99% which shows the quality of crystal with UV cutoff wavelength 240 nm From the thermal analysis it was found that the material was stable upto its melting point of 219.9 ºC The nonlinear optical study shows that the grown LGAZC crystal having 1.5 times higher nonlinearity than potassium dihydrogen phosphate (KDP) The photoconducity study reveals that LGAZC crystal exhibits positive photoconductivity The result of dielectric measurements indicates that the dielectric constant and dielectric loss decreases with increase of frequency and then it becomes almost constant at high frequency region Thus, optical, NLO and thermal property of the LGAZC crystal indicates that this crystal is highly suitable for optoelectronic and photonic applications 18 Acknowledgement: The authors thank B.S.Abdur Rahman University, Vandlur, Chennai for providing instrument facility for characterization and also the corresponding author thankfully acknowledge University Grants Commision for supporting the finance under Minor Research Project (No F MRP-6288/15 (SERO/UGC) References Laudise R.A (1970), “The growth of single crystals”, Prentice Hall, Eagle wood Cliffs, New Jersy Laudise R.A (1975), “Crystal growth and characterization”, Ed Ueda R and Mullin J.B., North – Holland publishing Co Brice J.C (1986) “The growth of crystals from liquids”, Wiley, Newyork Chemla D.S and Zyss J (1987), “Non-linear Optical Properties of organic molecules and crystals”, Vol 1-2 Academic Press Orlando Velsko S P., (1990) “Laser Program Annual Report”, Lawrence UCRL-JC 105000 (Lawrence Livermore National Laboratory, Livermore, California) Warren L.F (1990), Proceedings of the Fourth International SAMPE Electronics Conference, Ed Allred R.E.,Martinez R.J and Wischmann W.D (Society for the Advancement of Material and Process Engineeing,Covina,Ca.,1990),Vol.4, 388-396 Xing G., Jiang M., Sao Z., and Xu D., Chin J Lasers, 14 (1987) 302-308 Cullity B.D (1978), “Elements of X- ray diffraction”, II-Ed, Addition –Wesley, Reading, Mass, 57-65 Gnanasambandam C, Perumal S, J.Crystal Growth, 312 (2010) 1599-1604 10 Muhammed A Al-Krboly, Basima M Sarhan, Abdullah sh.Alany J Applied Chemistry, 7(11) (2014) 67-73 11 Redrothu Hanumantharao, S Kalainathan, Materials Letters, 74 (2012) 74-77 12 Mohd Anis, R N Shaikh, M.D Shirsat, S.S Hussaini, Optics and Laser Technology, 60 (2014)124-129 13 Christer B Aakeröy, Peter B Hitchcock, Brian D Moyle and Kenneth R Seddon, J Chem Soc., Chem Commun., (1989) 1856-1859 14 Srineevasan R and Rajasekaran R., J Mol Struct, 1048 (2013) 238-243 15 Rajasekaran R., Usharee P M., Jayavel R., Ramasamy P., J Cryst.Growth, 229 (2001) 563-567 19 16 Santanu Bhattucharya, Partha sarathi Dastidar, Guru Row T N., Chem Mater, (4) (1994) 531-537 17 Lefur Y., Bagiue-Beucher M., Masse R., Nicoud J F., Levy J P., Chem Mater (1) (1996) 68-75 18 Eimerl D, Velsko S, Davis L, Wang F, Loicono G and Kennedy G, IEEE J Quantum Electron QE-25(1989) 179-193 19 Monaco S.B, Davis L.E, Velsko S.P, Wang F.T, Eimerl D and Zaklin A, J Crystal Growth 85(1987)252-255 20 Rashkovich L.N, B Yu Shekunov, J Crystal Growth 112(1991)183-191 21 Epinosa E, Wyncke B, Brehat F, Gerbaux X, Veintemillas S and Molins E, Infrared Phys.Technology 38(1997) 449-458 22 Agarwal M.D, Choi J, Wang W.S, Bhat K, Lal R.B, Shields A.D, Penn B.G and Frazier D.O, J Crystal Growth 204 (1999) 179-182 23 Selvaraju K, Valluvan R, Kumararaman S, Mater Letters 60(2006) 2848-2850 24 Sathyalakshmi R, Kannan V, Bairava Ganesh R and Ramasamy P, Cryst Res Technology 42 (2007)78-83 25 Srineevasan R and Rajasekaran R., Journal of Optoelectronics and Advanced Materials, 16 (2014) 65-69 26 Ushashree P.M., Murlaidharan R., Jayavel R., Ramasamy P., J Crystal Growth 210 (2000) 741-745 27 Maadeswaran P., Thirumalairajan S., Chandrasekaran, Optik, 121(2010) 1620-1624 28 Anandha Babu G., Ramasamy P., Materials Chemistry and Physics 113 (2009) 727733 29 Venkatesan G., Anandha Babu G., Ramasamy P and Chandramohan A., Journal of Molecular Structure 1033 (2013) 121-126 30 Anandha Babu G., Ramasamy P., Spectrochimica Acta Part A 82 (2011) 521-526 31 Anandha Babu G., Perumal Ramasamy R., Ramasamy P and Natarajan S., Journal of Crystal Growth 311 (2009) 3461-3465 32 G Anandha Babu, P Ramasamy, J.Philip, Materials Research Bulletin 46 (2011) 631-634 33 Eaton D.F (1991), “Non-Linear Optical Materials” Science.(253) 281-287 34 Mahendra M Khandpekar, Shailesh S Dongare, Shirisha B Patil, Shankar P Patil, Optics Communications, 285(2012)1253-1258 35 Bukley H.E (1951) “Crystal growth” Champon Hall London  ... L- glutamic acid and L- glutamic acid zinc single crystal a (Å) b(Å) c (Å) α=β=γ Crystal System Space group Volume (Å3) Pure L- glutamic acid L- glutamic acid zinc crystal [43] chloride (LGAZC) crystal. .. physiochemical properties of nonlinear optical semi- organic crystal L- glutamic acid zinc chloride (LGAZC) Optically transparent and defect less crystal was grown by slow evaporation solution growth technique... molecular engineering, chemical stability, laser damage threshold and optical properties (linear and nonlinear) Incorporating the LGlutamic acid in many semi- organic nonlinear optical materials