共查询到18条相似文献,搜索用时 76 毫秒
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新型烷基芴共聚物的合成及电致发光性质 总被引:1,自引:0,他引:1
用微波加热法快速合成了两种新型的苯并噻唑基吡唑啉,并与芴共聚,制备了两种新型的主链含苯并噻唑及吡唑啉环的聚烷基芴电致发光材料,通过红外和核磁对其进行了表征。目标聚合物的玻璃化温度(Tg)为143℃和117℃,具有良好的热稳定性。用该聚合物为发光层作的结构为ITO/PEDOT/po ly-m er/BCP/A lq/M g:A g的聚合物发光二极管(PLED)起亮电压分别为和9.8 V和11.5 V,最大亮度分别为107 cd/m2和65 cd/m2。 相似文献
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聚芴及其衍生物是一类重要的聚合物蓝色电致发光材料.主要从均聚芴、共聚芴、以及C-9位引入螺环结构的聚芴等方面,介绍了聚芴类电致发光材料的研究进展. 相似文献
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新型功能材料聚烷基芴衍生物及其应用 总被引:5,自引:0,他引:5
由于新型功能高分子材料聚烷基芴的衍生物可用于制造发蓝光的二极管材料因而倍受青睐,在大面积显示领域具有广阔的应用前景。本文根据国内外研究者的报道;简要介绍了这类材料的合成,性能及其发光二极管方面的应用。 相似文献
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利用迈克尔加成反应合成了2,7-二溴-9,9-二-(3-丙基酰胺-2-甲基丙磺酸)芴单体,并通过Suzuki偶合反应制备了含不同磺酸比例的磺酸型聚芴(PF6SO3H)。通过核磁共振氢谱、凝胶渗透色谱、溶解性试验、紫外吸收光谱、荧光发射光谱、循环伏安曲线及热重分析法对聚合物结构和性能进行了表征分析。结果表明,成功合成了相对分子质量在3万~5万之间的磺酸型聚芴。发现随着磺酸型聚芴中磺酸基团含量的不同,聚合物在甲醇溶液中的溶解度不同,含有50%磺酸基团的PF6SO3H在甲醇中的溶解度达到了18mg/mL。磺酸侧链的引入使聚芴在薄膜状态和溶液状态下的紫外吸收最大吸收峰和最大荧光发射峰较聚(9,9-二己基)芴(PF6)发生了9nm~40nm红移,且能带隙逐渐变窄,同时磺酸型聚芴的HOMO较PF6增大。热失重分析发现磺酸侧链的引入,使得磺酸型聚芴的热稳定性较PF6有一定的下降。 相似文献
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以含芴芳香二胺和2,7-二溴-9-芴酮为单体,通过Buchwald-Hartwig交叉偶联反应缩聚合成了含芴聚亚胺酮(PIKF)。聚合物结构经核磁共振(1H-NMR)、红外光谱(FT-IR)及元素分析得以确认。通过凝胶渗透色谱(GPC)、差示扫描量热分析(DSC)、热重分析(TG)和X射线衍射(XRD)等对其性能进行测试,结果表明该类聚合物具有较高的分子量(-Mw>3.0×104)以及良好的热稳定性(T5%>310℃),在40℃~350℃的范围内没有观测到玻璃化转变;XRD显示PIKF为无定型结构,因而具有良好的溶解性能。另外,利用紫外、荧光等对其光学性能进行了测试,在四氢呋喃(THF)中的UV-vis的最大吸收波长为271 nm和369 nm左右,最大荧光发射波长分别在445 nm和455 nm。 相似文献
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用微波法快速地合成了单体方酸菁染料,并首次通过Suzuki偶联将其键合到聚芴的主链上,目标共聚物通过红外和核磁对其进行了表征。聚合物P1和P2的热分解温度分别为465.3℃和423.2℃,玻璃化温度分别为183.4℃和142.6℃,具有良好的热稳定性和加工性能。该类材料对太阳光的吸收在300nm~900 nm范围,覆盖了整个可见光区域和部分红外区域,电化学分析表明其具有1.46 eV和1.52 eV的低能隙。 相似文献
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报道了新型电致发光材料--聚对苯撑乙烯前驱聚合物的合成方法,研究了各中间体的合成工艺。并对前驱聚合物进行了性能测试。结果表明所 合成方法合理可行,并为PPV的合成提供参考数据。 相似文献
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有机电致发光材料研究进展 总被引:9,自引:0,他引:9
本文综述了有机电致发光材料的研究进展 ,重点介绍了聚合物电致发光材料的研究 ,并对这个领域存在的问题和有机电致发光材料的应用前景作了评述 相似文献
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新型蓝色电致发光材料——联苯乙烯衍生物的合成及发光性质研究 总被引:3,自引:0,他引:3
首次合成了一种新型的蓝色电致发光材料-联苯乙烯衍生物,4,4′-双[2,2(2-萘基,苯基)]苯乙烯基)-1,1‘-联苯(NPVBi),由于材料有较高的玻璃化转变温度,使它具有较好的热稳定性,制备了结构为ITO/TPD/NPVBi/Alq/LiF/Al的电致发光器件,研究了其电致发光性质,得到了色纯度较好的蓝色发光,特别是器件在不同的工作电流下,色坐标基本不变,色度相当稳定,研究表明NPVBi有望成为一种良好的蓝色发光材料。 相似文献
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Conjugated polyrotaxanes are conjugated polymeric semiconductors engineered at a supramolecular level by threading the conjugated moiety into molecular macrocycles, such as cyclodextrins (CD). CD-threaded rotaxanes thus provide a class of model compounds with reduced interchain interactions which enable us to explore the influence of such interactions on the fundamental photophysics of conjugated semiconductors. CD rotaxination also endows these materials with additional sites for functionalization, thus resulting in extremely versatile structures. Our current understanding of the photophysics of these materials is reviewed, both in solid/liquid solutions and in neat films, as a function of the relevant parameters, such as the threading ratio and the concentration, and with the help of rotaxanes incorporating a variety of different backbones. 相似文献
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Binuclear aluminum complex as an efficient orange emitter in single-layer electroluminescent devices
A binuclear aluminum complex with a chelating anilido-imine conjugated Schiff base ligand, 1,4-{o-C6H4[N(2,6-iPr2C6H3)][CH N]Al(CH3)2}2C6H4 (3), was synthesized from the alkane elimination reaction of trimethylaluminum with the free ligand, 1,4-{o-C6H4[NH(2,6-iPr2C6H3)][CH N]}2C6H4 (2), at room temperature. The photophysical properties of complex 3 were briefly examined and it was found that complex 3 displays bright orange luminescence in solution and in solid state. Electroluminescent devices were fabricated by doping complex 3 in polymer blend host of poly(vinylcarbazole) and 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazol using simple solution spin-coating technique. Efficient orange light emission was obtained from the fabricated single-layer organic light-emitting devices with a maximum current efficiency of 3.2 cd/A. 相似文献
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Jinyi Lin Bin Liu Mengna Yu Xuhua Wang Zongqiong Lin Xinwen Zhang Chen Sun Juan Cabanillas‐Gonzalez Linghai Xie Feng Liu Changjin Ou Lubing Bai Yamin Han Man Xu Wensai Zhu Trevor A. Smith Paul N. Stavrinou Donal D. C. Bradley Wei Huang 《Advanced materials (Deerfield Beach, Fla.)》2019,31(1)
Controlling chain behavior through smart molecular design provides the potential to develop ultrastable and efficient deep‐blue light‐emitting conjugated polymers (LCPs). Herein, a novel supramolecular self‐encapsulation strategy is proposed to construct a robust ultrastable conjugated polydiarylfluorene (PHDPF‐Cz) via precisely preventing excitons from interchain cross‐transfer/coupling and contamination from external trace H2O/O2. PHDPF‐Cz consists of a mainchain backbone where the diphenyl groups localize at the 9‐position as steric bulk moieties, and carbazole (Cz) units localize at the 4‐position as supramolecular π‐stacked synthon with the dual functionalities of self‐assembly capability and hole‐transport facility. The synergistic effect of the steric bulk groups and π‐stacked carbazoles affords PHDPF‐Cz as an ultrastable property, including spectral, morphological stability, and storage stability. In addition, PHDPF‐Cz spin‐coated gelation films also show thickness‐insensitive deep‐blue emission with respect to the reference polymers, which are suitable to construct solution‐processed large‐scale optoelectronic devices with higher reproducibility. High‐quality and uniform deep‐blue emission is observed in large‐area solution‐processed films. The electroluminescence shows high‐quality deep‐blue intrachain emission with a CIE (0.16, 0.12) and a very narrow full width at half‐maximum of 32 nm. Finally, large‐area and flexible polymer light‐emitting devices with a single‐molecular excitonic behavior are also fabricated. The supramolecular self‐encapsulation design provides an effective strategy to construct ultrastable LCPs for optoelectronic applications. 相似文献