Reversible Photomodulation of Electronic Communication in a π-Conjugated Photoswitch-Fluorophore Molecular Dyad
Reversible Photomodulation of Electronic Communication in a π-Conjugated Photoswitch-Fluorophore Molecular Dyad
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DOI：
10.1002/chem.201503419
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发表时间：
2016-01-18
影响因子：
4.3
通讯作者：
Hecht, Stefan
中科院分区：
文献类型：
--
作者：
Moreno, Javier;Schweighoefer, Felix;Hecht, Stefan
硼二吡咯亚甲基（BODIPY）荧光团和二芳基乙烯（DAE）光开关之间的电子耦合的程度已调制在共价连接的分子二联体通过照射与UV或可见光。在开放异构体中，两个部分可以被视为单独的发色团，而在封闭形式中，二联体的最低电子（S-0 -> S-1）跃迁轻微移动，从而能够光调节其荧光。瞬态光谱证实，二元体的行为显着不同的两个开关状态：而在开放的异构体，它类似于一个未受干扰的BODIPY荧光团，在封闭的异构体没有荧光发生，而是红移DAE行为盛行。
The extent of electronic coupling between a boron dipyrromethene (BODIPY) fluorophore and a diarylethene (DAE) photoswitch has been modulated in a covalently linked molecular dyad by irradiation with either UV or visible light. In the open isomer, both moieties can be regarded as individual chromophores, while in the closed form the lowest electronic (S-0 -> S-1) transition of the dyad is slightly shifted, enabling photomodulation of its fluorescence. Transient spectroscopy confirms that the dyad behaves dramatically different in the two switching states: while in the open isomer it resembles an undisturbed BODIPY fluorophore, in the closed isomer no fluorescence occurs and instead a redshifted DAE behavior prevails.