Fluorescence Photoactivation by Ligand Exchange around the Boron Center of a BODIPY Chromophore
Fluorescence Photoactivation by Ligand Exchange around the Boron Center of a BODIPY Chromophore
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DOI：
10.1021/ol401380n
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发表时间：
2013-06-21
期刊：
影响因子：
5.2
通讯作者：
Raymo, Francisco M.
中科院分区：
文献类型：
--
作者：
Ragab, Sherif Shaban;Swaminathan, Subramani;Raymo, Francisco M.
硼二吡咯亚甲基（BODIPY）平台的硼中心被儿茶酚配体螯合导致有效的荧光抑制。荧光猝灭是由于电子从螯合单元转移到相邻的发色团而引起的。在光酸产生剂的影响下，儿茶酚螯合剂可以与一对甲氧基配体交换。这种光诱导的转化阻止了电子转移，并有效地激活了BODIPY发色团的荧光。
Chelation of the boron center of the borondipyrromethene (BODIPY) platform by a catecholate ligand results In effective fluorescence suppression. Electron transfer from the chelating unit to the adjacent chromophore upon excitation Is responsible for fluorescence quenching. Under the influence of a photoacid generator, the catecholate chelator can be exchanged with a pair of methoxide ligands. This photoinduced transformation prevents electron transfer and efficiently activates the fluorescence of the BODIPY chromophore.