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光致变色材料是目前光功能材料领域中研究的热点之一.在众多的光致变色体系中,二芳烯化合物因其良好的热稳定性和抗疲劳性使其在信息光存储及分子光开关等领域有着广泛的应用前景. 相似文献
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近几十年来,光致变色在实际中的应用日益增多,特别是有机发光材料在光信息存储、分子开关和其他的光学器件方面,有着广泛的发展前景并且已经取得了许多突出成就,引起了广泛的关注[1].而有机偶氮化合物在光作用前后,其化学结构能够发生改变,因此在光开关和高精密度的信息存储材料方面得到了很好的应用.将金属原子引入到具有光致变色性质的偶氮化合物中,特别是那些具有空d轨道的过渡金属和空f轨道的稀土金属.由于他们的价电子数变化多,并且分子结构特殊,材料性能可以在很大的范围内进行调变.同时这些金属配合物分子中大多都具有共轭的π键,可以发生分子内电子转移反应,引起价电荷的转移,因而这一类化合物在光电功能材料方面具有很大的发展前景[2]. 相似文献
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THE EFFECT OF INCLUSION COMPOUNDS ON THE PHOTOPHYSICS AND PHOTOCHEMISTRY OF SCHIFF’s BASES
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通过形成希夫碱分子与环糊精或脱氧胆酸的包合化合物的方法,不仅可以使一些固态时具有热致变色性质的希夫碱表现出光致变色的性质,延长光产物的寿命,而且也可以在室温下检测到具有光致变色性质的包合化合物的荧光。 相似文献
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1 引言光致变色是一个或几个物种在吸收光谱显著改变的两个状态之间的可逆性变化,这种变化至少在一个方向是由光的照射引起的,而在另一方向通常则是自发的热变化过程[1]。若颜色较深的物种是热不稳定物种,则该体系称为“正”向光致变色体系,否则称为“逆”向光致变色体系。逆向光致变色体系化合物由于其有色体比较稳定,便于研究其有色体的构造、构型及变色机理,对于探索有机光致变色化合物在光信息存储等高科技领域的应用具有一定意义。我们用冠醚菁染料2-甲基-3-烷基-5,6-并-(15-冠-5)苯并噻唑季铵盐与方酸缩合得到了四个未见文献报道的光… 相似文献
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早在1978年,光致变色研究的先驱者Heller教授就提出光致变色反应可用于光信息存储和光记录材料,十年之后诺贝尔化学奖获得者Lehn教授又提出了光子器件,光致变色分子和体系的设计与合成为研制不同种类的光子器件提供了物质基础和可能性[1].具有光致变色特性的有序分子膜的制备及光学物理性质研究更吸引着众多的科学家进入这一研究领域[2~4]. 相似文献
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某些1-辛基-3,3-二甲基吲哚啉螺苯并吡喃的合成和光致变色性质 总被引:1,自引:0,他引:1
取代的吲哚啉螺苯并吡喃具有光致变色性质,在光信息显示和记录等现代技术领域已取得初步应用。以往的工作表明,这类化合物的光致变色性质与分子中的取代基有密切关系。氮上有长链烷基的吲哚啉螺苯并吡喃已有报道。 相似文献
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有机光致变色材料在信息存储、光分子开光、全息防伪等领域显示出良好的应用前景。吡唑啉酮类光致变色材料是一类在固态下具有光致变色性能的新型有机功能材料,然而大多数吡唑啉酮类变色化合物只表现出单向变色或热致褪色的性能。本文通过在吡唑啉酮环的4位引入含双取代的苯基,合成了两种新颖的光致变色化合物,通过质谱、核磁共振谱、红外光谱确定了它们的结构和变色机理。紫外-可见吸收光谱表明化合物除在可见光下具有褪色性能外,还具有热增幅现象。荧光发射光谱表明,他们在紫外光和可见光的交替照射下表现出较高的荧光对比度和良好的荧光开关性能。 相似文献
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Phytochemical investigation of Bacopa procumbens afforded two new phenolic glycosides 1 and 2, for the first time, along with 12 known compounds 3-14. Structures of these compounds were established based on spectral and chemical evidences. 相似文献
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Lan YH Wang HY Wu CC Chen SL Chang CL Chang FR Wu YC 《Chemical & pharmaceutical bulletin》2007,55(11):1597-1599
Two new compounds, 4,5-dioxoartacinatine (1) and 24-methylenelanosta-7,9(11)-diene-3-one (2), together with thirty known compounds were isolated and characterized from the stems of Artabotrys uncinatus. Structures of the new compounds were determined by spectral analysis. 相似文献
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In a previous paper, were ported a new stigmasteroyl glucoside derivative together with four known compounds. In addition to the above compounds, the isolation and identification of twenty‐four compounds from the same source are described here. Their structures were deter mined on the basis of spectral evidence as well as comparison with authentic samples. Those compounds included four waxes, four triterpenes, eight steroids, two glyceride, three flavonoids, and three phenylpropanoids. Some new compounds were found in mixtures of three alkyl ω‐hydroxyalkanoate, glyceride, and phenylpropanoids. 相似文献
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A new triterpenoid saponin, named esculentoside T (1), together with five known compounds (2-5), was isolated from the roots of Phytolacca acinosa. The structures of these compounds were elucidated on the basis of spectral data. 相似文献
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M Takasaki T Konoshima T Shingu H Tokuda H Nishino A Iwashima M Kozuka 《Chemical & pharmaceutical bulletin》1990,38(5):1444-1446
Three new euglobals with acylphloroglucinol-monoterpene structures, named euglobal -G1 (1), -G2 (2), and -G3 (3) were isolated from the chloroform extract of the juvenile leaves of Eucalyptus grandis (Myrtaceae). The structures of these new compounds were determined on the basis of their spectral data. The compounds strongly inhibited the Epstein-Barr virus activation. 相似文献
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Ten new glycosides were obtained along with five known compounds from the aerial part of Baccharis dracunculifolia DC. (Compositae). The structures of these glycosides were determined based on spectral and chemical evidence. These new compounds consisted of beta-D-glucopyranose or beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranose, and most possessed an (E)-caffeoyl group the same as dracunculifosides A-J. 相似文献
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A new series of 1,3‐Benzoxazines were synthesized from ketimines and triphosgene. The synthesized compounds were characterized by IR, 1HNMR, and mass spectral data. The synthesized compounds on bioevaluation indicated significant antifungal activity. 相似文献