We prepared a series of amino-substituted 9,10-anthraquinone (AQ) derivatives to study the photophysical properties, especially the intersystemcrossing (ISC) efficiency and the triplet excited states. Monoamino-substituted AQ derivatives show red-shifted absorption bands centered at 509 nm, as compared to the chloro-AQ derivatives (λabs = 340 nm). Interestingly, attaching an extra amino substituents
我们制备了一系列氨基取代的 9,10-蒽醌 (AQ) 衍生物来研究其光物理性质,尤其是系统间交叉 (ISC) 效率和三重激发态。与氯-AQ 衍生物 ( λ abs = 340 nm)相比,单氨基取代的 AQ 衍生物显示出以 509 nm 为中心的红移吸收带。有趣的是,在 AQ 发色团上附加一个额外的氨基取代基,即二氨基取代的 AQ 衍生物,不会引起吸收带的进一步红移。我们发现只有二氨基 AQ 衍生物显示出不错的 ISC 效率(单线态氧量子产率Φ Δ高达 33.3%),而单氨基-AQ 衍生物显示出可忽略的Φ Δ值。纳秒瞬态吸收光谱表明三重激发态的形成,并且三重激发态寿命被确定为约。2.5 微秒。这种相对较短的三重激发态寿命归因于二氨基取代的 AQ 衍生物的 T 1态的 n–π* 特征,这得到 DFT 计算的支持。我们表明,双氨基取代的 AQ 可用作烯烃单体光聚合的有效光引发剂,而 ISC 能力较差的
US3960751A
申请人:——
公开号:US3960751A
公开(公告)日:1976-06-01
Synthesis and Antitumor Activity of 1,8-Diaminoanthraquinone Derivatives
a series of regioisomeric disubstituted aminoanthraquinone (DAAQ) derivatives have been synthesized as cytotoxic activity based on a proposed bioactive amino conformation. To assess the biological activity of amino-substitution in the side-chains of anthraquinone located at positions 1 and 8 of the anthraquinone ring system. The aim of the study was to determine if members of the anthraquinone family