Issue 44, 2013

Heating and mechanical force-induced “turn on” fluorescence of cyanostilbene derivative with H-type stacking

Abstract

A cyanostilbene-based derivative with aggregation induced-emission was obtained, which exhibited multi-luminescent intensity under external stimuli. The as-prepared crystals of the desired dye showed a rather faint luminescence. Upon heating, its fluorescence could be turned on with the quantum yields of 13.3%. The quantum yields of the melted and solidified powders were further increased to 28.6%. Powder X-ray diffractometry, fluorescence spectroscopy, fluorescence lifetime experiments and single crystal XRD analyses were applied to investigate the changes of molecular packing modes. Such a transformation of fluorescence “dark”–“bright”, easily distinguished by naked eye, was related to the phase transition. The planar cyanostilbene with H-type packing and multiple mutable interactions may be the essential factor for the multi-luminescent intensity properties.

Graphical abstract: Heating and mechanical force-induced “turn on” fluorescence of cyanostilbene derivative with H-type stacking

Supplementary files

Article information

Article type
Paper
Submitted
24 Jun 2013
Accepted
10 Sep 2013
First published
10 Sep 2013

CrystEngComm, 2013,15, 8998-9002

Heating and mechanical force-induced “turn on” fluorescence of cyanostilbene derivative with H-type stacking

Y. Zhang, J. Sun, X. Lv, M. Ouyang, F. Cao, G. Pan, L. Pan, G. Fan, W. Yu, C. He, S. Zheng, F. Zhang, W. Wang and C. Zhang, CrystEngComm, 2013, 15, 8998 DOI: 10.1039/C3CE41221K

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