期刊
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
卷 11, 期 9, 页码 1414-1421出版社
SPRINGERNATURE
DOI: 10.1039/c2pp05404c
关键词
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资金
- National Basic Research Program of China [2010CB635108, 2011CBA00700]
- International S&T Cooperation Program, China [S2012ZR0152]
- Major Science and Technology, Special and Priority Themes of Zhejiang Province, China [2009C14004]
Cyanostilbene derivatives with the aggregation-induced emission enhancement (AIEE) activity are prepared by Knoevenagel and Suzuki reactions. Among them, the dye (Z)-2,3-bis(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)acrylonitrile (CNS-4) nanoparticle suspension shows the polarity-dependent characteristics of the fluorescence properties. By the fluorescence spectroscopy and transmission electron microscopy (TEM) analysis, the restriction of transfer from the local excited (LE) state to the intramolecular charge-transfer (ICT) state and crystal formation results in a blue-shift in emission and enhances the intensity in the aggregate state. Additionally, the luminophors CNS-3 and CNS-4 possess the AIEE effect as well as mechanochromic fluorescent properties. This mechanofluorochromic behavior originates from the change between the crystalline and the amorphous state.
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