Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China.
Chemistry. 2012 Oct 15;18(42):13388-94. doi: 10.1002/chem.201202189. Epub 2012 Sep 17.
A new photochromic bisthienylethene system (BTE-NAFc) is reported in which the ferrocene unit (Fc) is incorporated into a naphthalimide chromophore as the central ethene bridging unit. The incorporated Fc unit in the photochromic system of BTE-NAFc has several effects on optical properties, such as fluorescence-modulation through photoinduced electron transfer (PET), a decrease in the photochromic cyclization quantum yield, and a selective two-step oxidation process. The ability to drive ring-opening and ring-closing reactions with a secondary redox-modulation provides increased functionality to the photochromic system. Based on these meaningful photo- and redox-modulation properties, five unprecedented multi-addressable states (BTE-NAFc, BTE-NAFc(+), c-BTE-NAFc, c-BTE-NAFc(+), and BTE(+)-NAFc(+)) and gated photochromism are successfully obtained within the unimolecular BTE platform, thus providing deeper insight into photochromic systems as multifunctional outputs.
报道了一种新型光致变色双噻吩乙烯体系（BTE-NAFc），其中引入了二茂铁单元（Fc）作为中心乙烯桥联单元，将萘酰亚胺生色团整合到光致变色体系中。Fc 单元在 BTE-NAFc 的光致变色体系中具有多种光学性质的影响，例如通过光诱导电子转移（PET）进行荧光调制、光致变色环化量子产率降低以及选择性两步氧化过程。通过二次氧化还原调控驱动开环和闭环反应的能力为光致变色体系提供了更高的功能性。基于这些有意义的光和氧化还原调控性质，在单分子 BTE 平台内成功获得了五个前所未有的多寻址状态（BTE-NAFc、BTE-NAFc(+)、c-BTE-NAFc、c-BTE-NAFc(+)和 BTE(+)-NAFc(+)）和门控光致变色，从而为多功能输出的光致变色体系提供了更深入的见解。
