期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 7, 页码 2219-2224出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b11580
关键词
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资金
- National 973 Program [2013CB733700]
- NSFC for Creative Research Groups [21421004]
- NSFC for Distinguished Young Scholars [21325625]
- NSFC/China
- Oriental Scholarship
- Science and Technology Commission of Shanghai Municipality [15XD1501400]
- Fundamental Research Funds for the Central Universities [WJ1416005]
Light-driven transcription and replication are always subordinate to a delicate chirality transfer. Enabling light work in construction of the helical self-assembly with reversible chiral transformation becomes attractive. Herein we demonstrate that a helical hydrogen-bonded self-assembly is Open form Closed form reversibly photoswitched between photochromic open and closed forms upon irradiation with alternative UV and visible light, in which molecular chirality is amplified with the formation of helixes at supramolecular level. The characteristics in these superhelixes such as left-handed or right-handed twist and helical length, height, and pitch are revealed by SEM and AFM. The helical photoswitchable nanostructure provides an easily accessible route to an unprecedented photoreversible modulation in morphology, fluorescence, and helicity, with precise assembly/disassembly architectures similar to biological systems such as protein and DNA.
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