Visible-light responsive hydrogen-bonded supramolecular polymers based on ortho-tetrafluorinated azobenzene

Literature Information

Publication Date 2017-11-13
DOI 10.1039/C7PY01612C
Impact Factor 5.582
Authors

Meng-Di Lin, Jie Wei, Li-Juan Liu, Meng-Yan Yun, Lin Wu, Si-Tai Zheng, Huan-Huan Yin, Li-Chun Kong


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Abstract

Novel visible-light responsive hydrogen-bonded supramolecular polymers have been successfully constructed by using a linear molecule, which consists of two ureido-pyrimidinone (UPy) moieties connected by a photochromic ortho-tetrafluorinated azobenzene (TFAB) linker. Benefiting from the visible-light responsive feature of the TFAB unit, reversible photoisomerization between the two isomers of the monomer can be achieved. The E-isomer prefers to form a linear supramolecular polymer through the intermolecular quadruple hydrogen bonding interactions between UPys, whereas the Z-isomer facilely forms a cyclic dimer. Therefore, the polymerization mechanisms and properties of such supramolecular polymers, e.g. reversible visible-light induced gel–sol transformation behaviour, can be regulated by the reversible visible-light triggered E/Z photo-isomerization of the TFAB chromophore.

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Polymer Chemistry

Polymer Chemistry
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