Mechanofluorochromic properties of aggregation-induced emission-active tetraphenylethene-containing cruciform luminophores
Mechanofluorochromic properties of aggregation-induced emission-active tetraphenylethene-containing cruciform luminophores
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聚集诱导发射活性四苯乙烯十字形发光体的机械荧光变色特性
DOI:
10.1016/j.dyepig.2018.04.021
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发表时间:
2018-09
影响因子:
4.5
通讯作者:
Ling Zang
中科院分区:
文献类型:
--
作者:
Yonghui Wang;Defang Xu;Huaizhi Gao;Ying Wang;Xingliang Liu;Aixia Han;ChaoZhang;Ling Zang
Two twisted donor–acceptor cruciform luminophores (DHCS-TPEandDMCS-TPE) that were composed of two π-conjugated segments connected via a central benzene core have been prepared. Such cruciforms showed unique intramolecular charge transfer (ICT) emission, obvious aggregation-induced emission (AIE) properties (αAIE= 19 and 20, respectively) and high solid state efficiency (0.913 and 0.424, respectively). Especially, the two compounds exhibited substituent-dependent mechanofluorochromic (MFC) behavior. The as-prepared powders of the more twistedDMCS-TPEcould emit strong blue-green light centered at 474 nm, and the fluorescence color changed into yellowish green (531 nm) after grinding, a red shift of 57 nm was observed. Such mechanochromism was reversible upon the treatment of grinding and fuming with DCM. The high contrast MFC behavior ofDMCS-TPEoriginated from the planarization of the molecular conformation and subsequent planar intramolecular charge transfer (PICT) under external force. By sharp contrast, the less twistedDHCS-TPEexhibited no MFC behavior. The reason is that the less twisted molecular conformation ofDHCS-TPEgenerates strong intermolecular forces and close packing. Thus compared toDMCS-TPE, the crystalline solid powders ofDHCS-TPEpossess higher lattice energy and better structural stability. The grinding of the crystalline solid powders ofDHCS-TPEcannot lead to amorphization and mechanochromic luminescence.
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影响因子:
3.9
作者:
Zhou Lin;Xu Defang;Gao Huaizhi;Han Aixia;Yang Yan;Zhang Chao;Liu Xingliang;Zhao Feng
通讯作者:
Zhao Feng
影响因子:
4.5
作者:
Zhou Lin;Xu Defang;Gao Huaizhi;Han Aixia;Liu Xingliang;Zhang Chao;Li Zheng;Yang Yan
通讯作者:
Yang Yan
影响因子:
6.4
作者:
Zhang;Gonghe;Sun;Jingbo;Xue;Pengchong;Zhang;Zhenqi;Gong;Peng;Peng;Jiang;Lu;Ran
通讯作者:
Ran
影响因子:
--
作者:
S. Xue;Liang Yao;Suijun Liu;Cheng Gu;F. Shen;Weijun Li;Hui Zheng;Hongbin Wu;Yuguang Ma
通讯作者:
S. Xue;Liang Yao;Suijun Liu;Cheng Gu;F. Shen;Weijun Li;Hui Zheng;Hongbin Wu;Yuguang Ma
影响因子:
--
作者:
Pucci, Andrea;Ruggeri, Giacomo
通讯作者:
Ruggeri, Giacomo