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室温磷光(RTP)材料因其独特的发光性质和在光电、传感、生物成像及信息加密等领域广阔的应用前景吸引了研究者的兴趣。近年来,科学家探索了各种方法调控有机分子的室温磷光,并通过磷光分子结构设计以及磷光保护基质的构建成功构筑了长寿命和高量子效率的有机室温磷光材料。超分子凝胶作为诱导室温磷光的新基质,具有三维网络结构、热可逆性质及刺激响应性等优势而引起关注。本综述围绕无金属室温磷光凝胶材料和含金属室温磷光凝胶材料,总结了近年来关于室温磷光凝胶材料的研究现状,并在此基础上,简要展望了室温磷光凝胶材料研究的发展趋势。 相似文献
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金属配合物磷光材料因为其能同时利用单线态激子和三线态激子,引起了人们广泛关注。聚合物磷光材料(polymer phosphorescent materials,PPMs)同时具备小分子金属配合物的良好发光特性和高分子的优异物理性能,如容易挠曲、可溶液加工和良好的成膜性。本文综述了近年来聚合物磷光材料的研究进展,总结了聚合物磷光材料的合成方法及其在有机电致发光器件(OLED)方面的应用。最后从电磷光发光聚合物的分子结构设计出发,在电磷光发光聚合物领域业已取得进展的基础上,分析了电磷光发光聚合物在电致发光领域应用中存在的一些问题,并展望了电磷光聚合物今后的发展方向。 相似文献
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《高分子通报》2015,(7)
金属配合物磷光材料因为其能同时利用单线态激子和三线态激子,引起了人们广泛关注。聚合物磷光材料(polymer phosphorescent materials,PPMs)同时具备小分子金属配合物的良好发光特性和高分子的优异物理性能,如容易挠曲、可溶液加工和良好的成膜性。本文综述了近年来聚合物磷光材料的研究进展,总结了聚合物磷光材料的合成方法及其在有机电致发光器件(OLED)方面的应用。最后从电磷光发光聚合物的分子结构设计出发,在电磷光发光聚合物领域业已取得进展的基础上,分析了电磷光发光聚合物在电致发光领域应用中存在的一些问题,并展望了电磷光聚合物今后的发展方向。 相似文献
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有机电致发光器件是有机光电子领域的研究热点,在平板显示和固体照明领域有着广阔的应用前景.目前,由于器件效率和稳定性的问题,蓝色磷光器件是有机电致发光器件的瓶颈,而蓝色磷光主体材料的选择是影响蓝色磷光器件性能的关键因素.综述了小分子蓝色磷光主体材料的最新研究进展,重点介绍了各类小分子蓝色磷光主体材料的设计思想、器件性能.包括空穴传输性主体材料、含硅主体材料、电子传输性主体材料、双极主体材料和可湿法加工的蓝色磷光小分子主体材料的结构、特点及相应器件性能.最后对小分子蓝色磷光主体材料的发展方向进行了展望. 相似文献
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Uroš Grošelj Mojca Žorž Amalija Golobič Branko Stanovnik Jurij Svete 《Tetrahedron》2013,69(52):11092-11108
A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives. 相似文献
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The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp3)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp2)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp2)?H and aliphatic 1,5- and 1,6-C(sp3)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp3)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp2)?H insertion. 相似文献
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N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%). 相似文献
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Shashikant U. Dighe Surya K. Samanta Shivalinga Kolle Sanjay Batra 《Tetrahedron》2017,73(17):2455-2467
An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y1 and Y2. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones. 相似文献
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In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates. 相似文献
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Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described. 相似文献
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用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在. 相似文献
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Jona Mirnik Eva Pušavec Kirar Sebastijan Ričko Uroš Grošelj Amalija Golobič Franc Požgan Bogdan Štefane Jurij Svete 《Tetrahedron》2017,73(24):3329-3337
A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu0 as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than CuI in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT). 相似文献
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George E. Magoulas Thomas Garnelis Constantinos M. Athanassopoulos Dionissios Papaioannou George Mattheolabakis Konstantinos Avgoustakis Dimitra Hadjipavlou-Litina 《Tetrahedron》2012,68(35):7041-7049
(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C60, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine. 相似文献