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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Metal-directed synthesis of quadruple-stranded helical Eu(III) molecular switch: a significant improvement in
Yuan Zhang1, Yanyan Zhou1, Ting Gao1
1Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, P. R. China. yanpf@vip.sina.com and School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China. lihongfeng@hlju.edu.cn.
Abstract:
The self-assembly of a quadruple-stranded Eu(iii) helicate induces the conformation transformation of a DAE-based photochromic ligand from parallel to antiparallel, which brings a significant improvement in the photocyclization quantum yield (Φo-c) as compared with the free ligand. Furthermore, the photocontrolled open- and closed-rings of the ligand realized a reversible modulation toward Eu3+ center emission.
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