Photo-Controlled Macroscopic Self-Assembly Based on Photo-Switchable Hetero-Complementary Quadruple Hydrogen Bonds |
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| Authors: | Shi-Tao Han Hong-Ying Duan Lan-Yun Chen Dr Tian-Guang Zhan Dr Li-Juan Liu Li-Chun Kong Prof Kang-Da Zhang |
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| Institution: | Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Science, Zhejiang Normal University, 688 Yingbin Road, 321004 Jinhua, P.?R. China |
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| Abstract: | A photo-switchable hetero-complementary quadruple H-bonding array, which consists of an azobenzene-derived ureidopyrimidinone (UPy) module ( Azo-UPy ) and a nonphotoactive diamidonaphthyridine (DAN) derivative ( Napy-1 ), is constructed based on a reversible photo-locking approach. Upon UV (390 nm)/Vis (460 nm) light irradiations, photo-switchable quadruple H-bonded dimerization between Azo-UPy and Napy-1 can be achieved with exhibiting 4.8×104-fold differences in binding strength (ON/OFF ratios). Furthermore, smart polymeric gels with unique photo-controlled macroscopic self-assembly behavior can be fabricated by introducing such quadruple H-bonding array as photo-regulable noncovalent interfacial connections. |
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| Keywords: | hetero-complementary multiple hydrogen bonds photo-switchable macroscopic self-assembly azobenzenes competitive binding |
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