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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Characterization and optical properties of oligoazomethines with triphenylamine moieties exhibiting blue, blue-green and green light
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Characterization and optical properties of oligoazomethines with triphenylamine moieties exhibiting blue, blue-green and green light

机译：具有三苯胺部分的低聚偶氮甲亚胺的表征和光学性质显示蓝，蓝绿和绿光

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摘要

New photoluminescence oligoazomethines possessing both hole and electron-transporting units in the main chain were synthesized. Triphenylamine (TPA) was used as the electron-donating group, while 4,4'-diaminooctafluorobiphenyl. 4.4'-(hexafluoro-isopropylidene)dianiline, 4-aminophenylsulfone, 4,4'-(4,4'-isopropylidenediphenyl-1,1'diyldioxy)dianiline and 2,5-bis(4-aminophenyl)-1,3,5-oxadiazole were used as the electron-acceptor or as the electron-donating group. The bifunctional oligomers (D-pi-Aand D-pi-D) were Soluble in some organic solvents such as chloroform, DMA, HMPA, NMP and formed transparent films on glass Support. All oligomers exhibit high glass transition temperature in the range of 188-227 degrees C as determined by differential scanning calorimetry (DSC). The photoluminescence (PC) emission maximum peaks of the oligomers in solution are in the range of 459-552 nm (2.70-2.25 eV) corresponding to blue, blue-green or green light. The solvatochromic and protonation behavior of the oligomers in two solvents (DMA, chloroform) were detected. Oligomers protonated with methanesulfonic acid (MSA) are hypsochromically shifted with respect to the PL spectra of the pristine oligomers measured in solution. Relative PL intensity of the oligomers investigated in chloroform solution was found in the range of 0.10-0.50%, while for protonated ones it was detected in the range of 33-50% in relation to 9,10-diphenylanthracene. Blends of the oligoazomethines with poly(methylmethacrylate) (PMMA) (0.1%, w/w) emitted blue light. Thin films were also doped with iodine. Calculated energy gap for the undoped films following the Tauc relation was in the range of 2.46-2.69eV while for the iodine doped oligomers in the range of 1.76-2.38 eV was found. (C) 2008 Elsevier B.V. All rights reserved.
机译：合成了在主链上同时具有空穴和电子传输单元的新的光致发光低聚偶氮亚胺。三苯胺（TPA）被用作供电子基团，而4,4'-二氨基八氟联苯则被用作供电子基团。 4.4′-（六氟-异亚丙基）二苯胺，4-氨基苯砜，4，4′-（4，4′-异亚丙基二苯基-1，1′二基二氧基）二苯胺和2，5-双（4-氨基苯基）-1，3， 5-恶二唑用作电子受体或电子给体。双功能低聚物（D-pi-A和D-pi-D）可溶于某些有机溶剂，如氯仿，DMA，HMPA，NMP，并在玻璃载体上形成透明薄膜。通过差示扫描量热法（DSC）测定，所有低聚物均显示出在188-227℃范围内的高玻璃化转变温度。溶液中低聚物的最大光致发光（PC）发射峰在459-552 nm（2.70-2.25 eV）范围内，对应于蓝光，蓝绿色或绿色光。检测了低聚物在两种溶剂（DMA，氯仿）中的溶剂溶变色和质子化行为。甲磺酸（MSA）质子化的低聚物相对于溶液中测得的原始低聚物的PL光谱发生了色移。发现在氯仿溶液中研究的低聚物的相对PL强度在0.10-0.50％的范围内，而对于质子化的低聚物，相对于9,10-二苯基蒽，检出的PL强度在33-50％的范围内。低聚偶氮亚胺与聚（甲基丙烯酸甲酯）（PMMA）（0.1％，w / w）的混合物发出蓝光。薄膜也掺有碘。根据Tauc关系，未掺杂薄膜的计算能隙在2.46-2.69eV范围内，而碘掺杂低聚物的计算能隙在1.76-2.38eV范围内。 （C）2008 Elsevier B.V.保留所有权利。

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