Synthesis and characterization of fluorene based oligomers and polymers

... data of the polymers P1 and P2 78 Table 3.1 The SEC data of polymer P1 and P2 87 Table 3.2 The optical data and fluorescence quantum yields (both in chloroform solutions) of polymer P1 and P2 ... their pure blue and efficient electroluminescence coupled with a high charge-carrier mobility and good processability In our work, four series of fluorene based new polymer...

Ngày tải lên: 11/09/2015, 09:10

... Mo, and Nb and different doping concentrations We report on the influence of each element and respective concentrations on the crystal structure of the films, optical /thermochromic performance and ... derivative of both curves of the hysteresis loops (heating and cooling) and considering the mean value Results and discussion Structural characterization The crystal s...

Ngày tải lên: 21/06/2014, 04:20

... processing of large-scale graphene Nat Nanotech 2009, 4:25-29 doi:10.1186/1556-276X-7-53 Cite this article as: Kim et al.: Fabrication and characterization of carbon-based counter electrodes prepared by ... graphene, SWNTs, and graphene-SWNT composites could perform sufficiently well as counter electrodes for DSSCs Figure Nyquist plot of DSSCs Nyquist plot of D...

Ngày tải lên: 20/06/2014, 23:20

... processing of large-scale graphene Nat Nanotech 2009, 4:25-29 doi:10.1186/1556-276X-7-53 Cite this article as: Kim et al.: Fabrication and characterization of carbon-based counter electrodes prepared by ... graphene, SWNTs, and graphene-SWNT composites could perform sufficiently well as counter electrodes for DSSCs Figure Nyquist plot of DSSCs Nyquist plot of D...

Ngày tải lên: 21/06/2014, 17:20

... that of human calvarium bone c modulus of pure magnesium is h similar to that of human bone half of that of Ti6Al4V.[9] Therefore, of magnesium areFigure attractive for 5: pH-potential of magnesium ... The primary hypothesis is that a magnesium core wound closure device for microsurgery can be employed for wound closure within reasonable error of degrad...

Ngày tải lên: 02/10/2015, 17:15

... Results and discussions The structures of the PPy/Zn0.5Cu0.5Fe2O4 nanocomposite were investigated by FTIR spectroscopy and X-ray diffraction FTIR spectra of the PPy and PPy/Zn0.5Cu0.5Fe2O4 nanocomposite ... XRD patterns of PPy/Zn0.5Cu0.5Fe2O4 nanocomposite (a) and the reference standard data for Zn0.5Cu0.5Fe2O4 of the JCPDS file No 77-0012 (b) Fig SEM micrographs of Zn0...

Ngày tải lên: 20/03/2014, 13:08

... reference to Coordination chemistry of pyrazolone based schiff bases relevant to uranyl 663 Table 4b1 Various bond length of compound (5) S No Atoms Actual bond length Optimal bond length S No Atoms ... satisfactory analytical data and all the studies presented above suggest that the complexes are of the compositions, Coordination chemistry of pyrazolone b...

Ngày tải lên: 02/09/2015, 13:48

... DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY NATIONAL UNIVERSITY OF SINGAPORE 2010 SYNTHESIS, CHARACTERIZATION AND POTENTIAL APPLICATIONS OF PYRENE BASED ORGANIC MATERIALS Abstract Fluorescent pyrene ... Types of Pyrene Polymers 17 Applications of Pyrene Derivatives 18 Applications in Organic Electronics 19 1.6.1.1 Pyrene Based LCDs 19 1.6.1.2 Py...

Ngày tải lên: 11/09/2015, 10:19

... 2 263 The electrode surface area was 0.785 cm2 6. 3 Details of the amphiphilic poly(p- phenylene)s synthesized and used for the present study 6. 3.1 Synthesis and characterization of monomers and ... 3 .69 (b, OCH2), 3. 46 (b, CH2O), 3.37 (b, OCH2CH2), 1 .66 (b, CH2), 1.24 (b, CH2), 0.87 (b, CH3) 13 C NMR (CDCl3, δ, ppm): 150, 117.1, 98 .6, 69 .5, 67 .5, 62 .1, 31.8, 30...

Ngày tải lên: 14/09/2015, 18:36

... C12PPPC11OH Scheme 5. 1 Chemical structures of the PPPs used for silica polymerization 5. 2 Results and Discussions 5. 2.1 Synthesis of Polymer C12PPPOC11OH The synthesis and characterization of the monomer ... sizes ranging from 50 0 nm to 900 nm (Figure 5. 4) 156 Synthesis and Characterization of Luminescent Conjugated Polymer-Silica Composite Spheres A μm B μm...

Ngày tải lên: 14/09/2015, 18:37

... Films of Carbazole Functionalized poly(p- phenylene)s via Electropolymerization N (CH2)5 O n O (CH2)5 CH3 Figure 4. 1 Chemical structure of the polymer C6PPPC5Cb 4. 2 Results and Discussion 4. 2.1 Synthesis ... Synthesis and Characterization of the polymer C6PPPC5Cb The polymer C6PPPOH was synthesized using Suzuki polycondensation of the respective monomers and the det...

Ngày tải lên: 14/09/2015, 18:37

... (eV) LUMO (eV) 34 0 412 407 3. 19 -5. 93 -2. 83 C12PPPOH 34 7 34 8 414 417 3. 17 -5. 43 -2.84 2.59 57±2% 50±5% C18PPPOH 33 1 33 8 407 411 3. 21 -5.74 -3. 13 2.61 69±2% 53 5% 0.12 30 V 0.08 28V 26V 0.04 24V ... (Figure 3. 1) OH OH OH x O O O (CH2)n (CH2)n (CH2)n CH3 CH3 CH3 Figure 3. 1 Molecular structure of CnPPPOH polymers 94 Photophysical Properties of a New Class of A...

Ngày tải lên: 14/09/2015, 18:37

... 0.0 20 22 24 26 28 30 32 θ/deg Reflectivity R 0.8 0.6 0.4 0 .2 0.0 20 (B) Gold Thiol layers 12 layers 16 layers 22 24 26 θ/deg 28 30 82 LS and LB Film Formation of Planar Amphiphilic poly(p- phenylene)s ... structure of CnPPPOH polymers 2. 2 Results and discussion 2. 2.1 Synthesis and characterization of the polymer C6PPPOH, C12PPPOH and C18PPPOH A series...

Ngày tải lên: 14/09/2015, 18:38

... π-band (valence band) of the polymer and the lowest unoccupied molecular orbitals (LUMO) form the π*-band (conduction band) of the polymer As a consequence of the band alternation, band gap of ... polyaniline 1. 2 Poly(p- phenylene)s the simplest aromatic conjugated polymer 1. 2 .1 A brief history of PPP Poly(p- phenylene)s, PPPs, constitute the prototype of rigid-rod polym...

Ngày tải lên: 14/09/2015, 18:38

... PVDF-SPS composite membrane Table shows the water uptake of the pristine PVDF membrane, the PVDF-PS membrane and the PVDF-SPS composite membrane The blending of PS polymer reduces the water uptake of ... of the PVDF-SPS membrane: (a) C1s, (b) O1s, (c) S2p 3.4 Morphology of the PVDF-SPS composite membrane The morphologies of the pristine PVDF...

Ngày tải lên: 05/09/2013, 16:11