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合成了含有不同烷基链取代的N-丙烯酰氧癸基咔唑(MACZ10)和N-丙烯酰氧十二烷基咔唑(MACZ12), 通过自由基聚合得到聚N-丙烯酰氧烷基咔唑(PMACZ). 分子量分析表明, 随着烷基链长度的增加, 聚合物分子量减小, 分布变宽. 荧光光谱表明, 随着烷基链长度的增加, 聚合物在353 nm处的发射峰逐渐减弱. 在四氢呋喃和体积分数为10%三氟化硼乙醚与四氟化硼四丁基胺的混合电解质溶液中, 直接阳极氧化PMACZ获得自支撑交联网状的聚(聚N-丙烯酰氧烷基咔唑)(PPMACZ)薄膜. PPMACZ薄膜具有良好的氧化还原活性、热稳定性和蓝色发光性能, 聚合物氧化还原可逆性随着烷基链长的增加而增加, 且发射峰变宽. 相似文献
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采用Suzuki偶合反应合成了一系列新型的咔唑、芴和2,1,3-苯并硒二唑的共聚物——聚[3,6-(N-(2-乙基己基))咔唑-2,1,3-苯并硒二唑-9,9-双(N,N-二甲基胺丙基)芴](PCzN-BSeD)及其相应的聚电解质衍生物——聚[3,6-(N-(2-乙基己基))咔唑-2,1,3-苯并硒二唑-9,9-(双(3′-(N,N-二甲基)-N-乙基铵)丙基)芴]二溴(PCzNBr-BSeD).在聚咔唑和芴中引入不同比例的2,1,3-苯并硒二唑(BSeD)单元,引起了由咔唑和芴链段向窄带隙苯并硒二唑(BSeD)单元有效的能量转移.通过对聚合物电致发光性能的研究,发现用聚(3,4-亚乙基二氧基噻吩)(PEDOT)或聚(3,4-亚乙基二氧基噻吩)/聚乙烯咔唑(PEDOT/PVK)作为空穴传输层时,器件的性能相差不大,表明咔唑的引入较明显的改善了聚合物的空穴注入性能.而且几乎所有的聚合物用高功函数铝作阴极的器件和用钡/铝作阴极的器件具有相近的发光性能,表明这类聚合物具有良好的电子注入性能. 相似文献
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N-(2-乙烯氧乙基)-1,8-萘二甲酰亚胺聚合物与共聚物的荧光行为 总被引:2,自引:0,他引:2
<正> 我们曾报道过一系列含有给电子生色基团的丙烯酰类单体如甲基丙烯酸二甲氨基苄酯、N-(N′,N′-二甲氨基苯基)丙烯酰胺类、8-丙烯酰氧喹啉类、N-丙烯酰-N′-苯基哌嗪类、N-丙烯酰-N′-嘧啶哌嗪类、N-甲基丙烯酰氧乙基-N-甲基代苯胺等的合成、聚合、引发行为以及它们的聚合物的荧光行为。这些单体结构的共同点在于其双键为缺电子性而生色基团为给电子性,因而在荧光行为上,由于生成激基复合物或电荷转移而发生荧光 相似文献
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合成了一种新的反应性聚合物聚N-ε-甲基丙烯酰胺基己酰氧-5-降冰片烯-2,3-双甲酰亚胺[P(MACONB)],其相应的新单体N-ε-甲基丙烯酰胺基己酰氧-5-降冰片烯-2,3-双甲酰亚胺(MACONB),是由N-ε-甲基丙烯酰胺基己酸(MACOH)与N-羟基-5-降冰片烯-2,3-双甲酰亚胺(HONB)在环己基羰二亚胺存在下经偶联成酯反应而得。反应性聚合物P(MACONB)是一个较好的固定化胰蛋白酶的载体,它极易与胰蛋白酶在温和反应条件下进行胺解反应,形成一个具有较高酶活力的固定化胰蛋白酶。 相似文献
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Simokaitiene J Stanislovaityte E Grazulevicius JV Jankauskas V Gu R Dehaen W Hung YC Hsu CP 《The Journal of organic chemistry》2012,77(11):4924-4931
The synthesis and full characterization of new derivatives of indolo[3,2-b]carbazole with differently substituted phenyl groups at nitrogen atoms is reported. Comparative study on their thermal, optical electrochemical, and photoelectrical properties is presented. The synthesized compounds are electrochemically stable. Their highest occupied molecular orbital energy values range from -5.14 to -5.07 eV. The electron photoemission spectra of the films of synthesized materials revealed the ionization potentials of 5.31-5.47 eV. Hole drift mobility of the amorphous film of 5,11-bis(3-methoxyphenyl)-6-pentyl-5,11-dihydroindolo[3,2-b]carbazole exceed 10(-3) cm(2)/V·s at high electric fields, as it was established by xerographic time-of-flight technique. In contrast to diphenylamino substituted derivatives of carbazole, no effect of the position of methoxy groups on the photoelectrical properties was observed for the synthesized methoxyphenyl-substituted derivatives of indolo[3,2-b]carbazole. The indolo[3,2-b]carbazole core has a larger resonance structure that includes 3 phenyl rings, and thus the energy gap of the HOMO and LUMO π orbitals is lower as compared to that of carbazoles. With a larger energy difference between the phenyl substituents and the core moiety, the indolo[3,2-b]carbazole derivatives studied all have a weaker coupling between the phenyl group and a much weaker dependence of the molecular properties on the position of substituents on the phenyl groups as compared to those observed in substituted carbazoles. 相似文献
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Woo HY Hong JW Liu B Mikhailovsky A Korystov D Bazan GC 《Journal of the American Chemical Society》2005,127(3):820-821
A series of alpha,omega-donor-substituted distyrylbenzene dimers held together by the [2.2]paracyclophane core were designed, synthesized, and characterized. Different substituents were chosen to modulate the strength of the donor nitrogen groups and to allow the molecules to be either neutral and soluble in nonpolar organic solvents or charged and water-soluble. The specific neutral structures are (in order of decreasing donor strength) 4,7,12,15-tetra[N,N-bis(6' '-chlorohexyl)-4'-aminostyryl]-[2.2]paracyclophane (1N), 4,7,12,15-tetra[(N-(6' '-chlorohexyl)carbazol-3'-yl)vinyl]-[2.2]paracyclophane (2N), and 4,7,12,15-tetra[N,N-bis(4' '-(6' '-chlorohexyl)phenyl)-4'-aminostyryl]-[2.2]paracyclophane (3N). The charged species are 4,7,12,15-tetra[N,N-bis(6' '-(N,N,N-trimethylammonium)hexyl)-4'-aminostyryl]-[2.2]paracyclophane octaiodide (1C), 4,7,12,15-tetra[(N-(6' '-(N,N,N-trimethylammonium)hexyl)carbazol-3'-yl)vinyl]-[2.2]paracyclophane octaiodide (2C), and 4,7,12,15-tetra[N,N-bis(4' '-(6' '-(N,N,N-trimethylammonium)hexyl)phenyl)-4'-aminostyryl]-[2.2]paracyclophane octaiodide (3C). Two-photon excitation spectra, measured using the two-photon induced fluorescence technique, show in toluene the following trend for the two-photon cross sections (delta): 3N > 2N > 1N. In water the delta values follow the same order, 3C approximately 2C > 1C, but are smaller (approximately one-third). Significantly, the fluorescence quantum yield (eta) in water decreases much more for 1, relative to 2 and 3. The two-photon action cross sections (deltaeta) of 2C and 3C are 294 GM and 359 GM, respectively. These values are among the highest reported thus far. These results show that, to maximize the deltaeta in this class of chromophores, one needs to fine-tune the magnitude of the charge transfer character of the excited state, to minimize fluorescence quenching in polar media. 相似文献
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Dariusz Bogdal Michal Pajda Jerzy Sanetra Monika Pokladko Katarzyna Matras Andre-Jean Attias Jean-Luis Fave 《Macromolecular Symposia》2008,268(1):110-114
Summary: A novel acrylate polymer with a carbazole pendant group and bipyridine derivatives as side chains was synthesized, in which derivatives of bipyridine as electro-optic chromophores and carbazole as photoconductive moiety were covalently linked to the acrylate backbone. 2–(Carbazol-9-yl)ethyl methacrylate (CEM) and methacrylic 2-[5-(2-{5,5′-dimethyl-6′-[2-(5-pentylthiophen-2-yl)vinyl]-3,3′-bipyridin-6-yl}vinyl)thiophen-2-yl]ethyl methacrylate (BiPy) were synthesized and then copolymerized to give 99:1, 98:2, 92:8 (mol/mol) CEM/BiPy copolymers. Films of the copolymers blended with poly(3-octylthiophene) (P3OT) or poly(3-decylthiophene) (PDT) and sandwiched between the transparent ITO and Al electrode were examined for photovoltaic properties. 相似文献
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The synthesis of N,N'-bis[6-(2-hydroxy-2-phenylethylamino)hexyl] cystamines 4 , and N-(2-hydroxy-2-phenylethyl)-1,6-hexanediamines 6 are described. Compounds 4 were obtained by condensation of the requisite epoxide 2 with 3-(6-aminohexyl)-1,3-thiazolidine followed by dimerization with opening of the thiazolidine ring. A similar method was used for the preparation of compounds 6. In order to prepare 4j (N,N'-bis{6-[2-hydroxy-2(3,4-dihydroxyphenyl)ethylamino]hexyl}cystamine), several procedures were tested; the method of choice involved the use of 3,4-dihydroxybenzaldehyde with both hydroxy groups protected as methoxymethyl ethers. 相似文献
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Viinikanoja A Areva S Kocharova N Aäritalo T Vuorinen M Savunen A Kankare J Lukkari J 《Langmuir : the ACS journal of surfaces and colloids》2006,22(14):6078-6086
We have studied the structure and morphology of self-assembled polyelectrolyte multilayers prepared using poly(styrenesulfonate) (PSS) and four different cationic poly(alkoxythiophene) derivatives bearing methylimidazolium-terminated ionic side chain at the 3-position of the thiophene ring: poly(1-methyl-3-[3-[3-thienyloxy]-propyl]-1H-imidazolium) (P3TOPIM), poly(1-methyl-3-[6-[3-thienyloxy]-hexyl]-1H-imidazolium) (P3TOHIM), poly(1-methyl-3-[2-[(4-methyl-3-thienyl)oxy]-ethyl]-1H-imidazolium ) (P4Me-3TOEIM), and poly(1-methyl-3-[6-[(4-methyl-3-thienyl)oxy]-hexyl]-1H-imidazolium ) (P4Me-3TOHIM). All the multilayers exhibited regular growth. The thickness of the multilayers was measured with ellipsometry, their layer-by-layer growth was followed by polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS) and ellipsometry, and the morphology of the films was studied by atomic force microscopy (AFM). The length of the methylimidazolium-terminated side chain (C(n), n = 2, 3, 6) and the substituent (H or Me) at the 4-position of the thiophene ring were varied. All multilayers were inhomogeneous in the sub-micrometer scale and contained aggregates of two kinds. The large ones with a low and constant surface number density were attributed to PSS, whereas the small aggregates were polythiophene-based. The surface density of these organic semiconducting nanoparticles greatly depended on the structure of polythiophene, being favored by polymer regioregularity and the length of the side chain. The side chains remained disordered in all the multilayers, but with polythiophenes having hexyl chains both the imidazolium and thiophene rings tended to orient themselves more perpendicular to the surface than in films containing shorter chains (C2 or C3). The relative water content of the multilayers (at 7.1% relative humidity) did not depend on the film thickness and was the lowest for P4Me-3TOHIM. As the number of bilayers increased the methylimidazolium-sulfonate ion pairs gradually weakened and became more individually hydrated. 相似文献
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New conjugated copolymers containing alternating N‐hexyl‐3,8‐iminodibenzyl and divinylbenzene chromophores {poly(N‐hexyl‐3,8‐iminodibenzyl‐1,2‐ethenylene‐2,5‐dihexyloxy‐1,4‐phenylene‐1,2‐ethenylene) ( P1 ) and poly[N‐hexyl‐3,8‐iminodibenzyl‐2,5‐bis(hexyloxy)cyanoterephthalidene] ( P2 )} were synthesized according to Wittig and Knoevenagel polymerization. A copolymer containing alternating carbazole and divinylbenzene derivatives {poly[9‐(2‐ethylhexyl)‐3,6‐carbazole‐1,2‐ethenylene‐2,5‐dihexyloxy‐1,4‐phenylene‐1,2‐ethenylene] ( P3 )} was also synthesized for comparison. The copolymers were soluble in common organic solvents such as tetrahydrofuran and toluene. Absorption and photoluminescence measurements revealed that cyano substitution at the vinylene moiety in P2 brought about a significant bathochromic shift and led to an electroluminescence color change from green to orange. The band edge energies of the copolymers were estimated from cyclic voltammograms and optical band gaps. P1 and P3 showed similar highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels, indicating that the electron‐donating abilities of the iminodibenzyl and carbazole chromophores were comparable. However, compared with those of P1 and P3 , the HOMO and LUMO levels of P2 were greatly reduced because of conjugating and electron‐withdrawing CN groups. The threshold electric field of an Al/ P1 /ITO glass single‐layer light‐emitting diode was approximately 10 × 105 V/cm, whereas those for P2 and P3 were 7.5 and 16 × 105 V/cm, respectively. The electroluminescence emission maxima of P1–P3 were 498, 514, and 559 nm, respectively. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 3847–3857, 2002 相似文献
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以吲哚-3-丙酸和吲哚-3-丁酸为原料,分别与炔丙胺发生缩合反应得到3-(丙酰丙炔胺)吲哚(4a)和3-(丁酰丙炔胺)吲哚(4b),然后4a和4b分别与9-(叠氮基乙基氨基)-1,2,3,4-四氢吖啶类衍生物5a~5c在微波辐射下发生Husigen[3+2]环加成反应得到12个新型乙酰胆碱酯酶抑制剂——他克林-吲哚杂二联体,其结构经NMR,IR和HRMS表征.初步生物活性测试表明,目标化合物均具有较强的乙酰胆碱酯酶抑制能力,其中化合物2b和2d抑制鱼鳐乙酰胆碱酯酶的IC50值分别为1.6和2.0 nmol.L-1,是6T6BA(IC50=11.0 nmol.L-1,鱼鳐)的6.9和5.5倍. 相似文献
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ZHANG Qian CHEN Jiang-shan CHENG Yan-xiang WANG Li-xiang MA Dong-ge JING Xia-bin WANG Fo-song 《高等学校化学研究》2006,22(5):647-650
IntroductionThe development of organic light-emitting diodes(OLEDs)has been the subject of intensive academicand industrial research that is directed toward the fabri-cation of large-area,monocolor and full color flat-paneldisplays[1].Ever since Tanget al… 相似文献