[PDF] Top 20 Synthesis and characterization of poly(fluorene)-based copolymers containing various 1,3,4-oxadiazole pendants

... spectra of these polymers are almost the same at 8 V and exhibit stable EL emissions under forward ...spectra of P3 are almost unchanged and without any low energy emission band as ... See full document

... Characterization. 1 H NMR spectra were recorded on a Varian Unity 300 MHz spectrometer using CDCl 3 ...heating and cooling rate of 10 ...rate of 20 ...standard and THF as ... See full document

... accepted 3 August 2006 DOI: ...series of poly(fluorene-co-alt-phenylene)s containing various generations of dendritic oxadiazole (OXD) pendent wedges were synthesized by ... See full document

... nm and the maximum PL wavelength (l max,PL ) around 386 nm in ...Fig. 4 shows the UVevisible absorption and PL spectra of monomers M1 and M2 in ...consisting of fluorene ... See full document

... injection and transportation of both holes and electrons into the polymer emissive layer is ...necessary. 4-8 However, most EL polymers inject and transport holes more efficiently than ... See full document

... thesis of side-chain LC block copolymers, 8–12 in which mesogenic pendent groups were grafted onto polymer backbones to form side-chain LC ...type of materials resides in the cohesive properties ... See full document

... voltage of 10 V, all PLED devices in ...nm and their EL intensities were enhanced by increas- ing the bias ...voltages of all PLED devices based on BCP/ALQ were approximately ...efficiency ... See full document

... backbones of the polymers. It is noticed that P1 exhibits a much larger absorption l max value than ...shift of the absorption maxima in P2– P4 may be ascribed to loss coplanarity of ... See full document

... the copolymers incorporating pendant electron-deficient 1,3,4- oxadiazole moieties on their side ...photocurrents of devices were enhanced in the presence of an optimal ... See full document

... inset of Figure 3, this device emitted a deep- blue color-with two sharp bands at 428 and 452 nm in the EL spectrum-corresponding to CIE color coordinates of ...position and shape, to ... See full document

... presence of metal ions/suitable counter ligands, which can induce a large energy ...systems and plays significant roles in metabolic process- ...ficiency and overload of Fe 2 + can cause ... See full document

... all of the amorphous polyesters. The tensile modulus and strength of the copolyesters increased with ...brittle and their elongation at break ... See full document

... series of 1,3,4-oxadiazole-based aromatic and heterocyclic/phenylpyrazole derivatives 6a–c, 7a–d, and 8 were synthesized via sequential 1,3-dipolar ... See full document

... School of Science, Beijing Jiaotong University, Beijing 100044, PR China b Beijing ...No. 4 High School, Beijing 100034, PR China c Institute of Modern Catalysis, Department of Organic ... See full document

... studies and NMR spectroscopy has been used to quantify the different subunits that ap- pear in the hyperbranched polymer and subse- quently to determine its ...DB of P1 is given in Scheme ... See full document

... spectra of the API films. The APIs exhibit broad and structureless fluorescent properties [2 –13] ...most of light-emitting polymers, an aggregation of molecular chains will assist an ... See full document

... presence of well-defined vibronic structures in the emission spectra indicates that the polymers have rigid and well-defined backbone ...these copolymers in comparison with that of PF ... See full document

... band of the gold nanorods upon grafting of monomer TF and polymer PTF to the nanorod ...surfaces of GNRs, these shifts in adsorption maxima were attributed to changes in the local refractive ... See full document

... polymers of high molecular weight and exhibiting good ...presence of octyloxyphenyl groups attached to the PP moieties increased the solubility and, thereby, extended the conjugation length ... See full document

... weighted and sealed in an aluminum ...scan and then scanned between 30 and 280 ◦ C at a scan rate of 20 ◦ ...midpoint of the heat capacity transition between the upper and lower ... See full document