Jian Wang;Ju Mei;Rongrong Hu;Jing Zhi Sun;Anjun Qin;本忠 唐
Zhejiang University;Hong Kong University of Science and Technology;China Association for Science and Technology
发表时间:2012-6-20
期 刊:Journal of the American Chemical Society
语 言:English
U R L: http://www.scopus.com/inward/record.url?scp=84862518012&partnerID=8YFLogxK
It has been difficult to decipher the mechanistic issue whether E/Z isomerization is involved in the aggregation-induced emission (AIE) process of a tetraphenylethene (TPE) derivative, due to the difficulty in the synthesis of its pure E and Z conformers. In this work, pure stereoisomers of a TPE derivative named 1,2-bis{4-[1-(6-phenoxyhexyl)-4-(1,2,3-triazol)yl]phenyl}-1,2- diphenylethene (BPHTATPE) are successfully synthesized. Both isomers show remarkable AIE effect (α AIE ≥ 322) and high fluorescence quantum yield in the solid state (φ F 100%). The conformers readily undergo E/Z isomerization upon exposure to a powerful UV light and treatment at a high temperature (>200 °C). Such conformational change, however, is not observed under normal fluorescence spectrum measurement conditions, excluding the involvement of the E/Z isomerization in the AIE process of the TPE-based luminogen. The molecules of (E)-BPHTATPE self-organize into ordered one-dimensional nanostructures such as microfibers and nanorods that show obvious optical waveguide effect. BPHTATPE shows rich chromic effects, including mechano-, piezo-, thermo-, vapo-, and chronochromisms. Its emission peak is bathochromically shifted by simple grinding and pressurization and the spectral change is reversed by fuming with a polar solvent, heating at a high temperature, or storing at room temperature for some time. The multiple chromic processes are all associated with changes in the modes of molecular packing.
化合物
工程与材料科学
医学与生命科学
Scopus度量
年份 | CiteScore | SJR | SNIP |
---|---|---|---|
1996 | |||
1997 | |||
1998 | |||
1999 | 3.438 | 2.106 | |
2000 | 3.589 | 2.141 | |
2001 | 3.506 | 2.112 | |
2002 | 3.587 | 2.324 | |
2003 | 3.421 | 2.223 | |
2004 | 3.841 | 2.187 | |
2005 | 4.413 | 2.205 | |
2006 | 4.662 | 2.229 | |
2007 | 5.202 | 2.134 | |
2008 | 5.06 | 2.121 | |
2009 | 4.958 | 2.199 | |
2010 | 5.167 | 2.14 | |
2011 | 16.1 | 5.478 | 2.326 |
2012 | 17.4 | 6.211 | 2.373 |
2013 | 19.3 | 5.993 | 2.446 |
2014 | 20.9 | 6.294 | 2.568 |
2015 | 22.4 | 6.775 | 2.602 |
2016 | 23.5 | 7.492 | 2.608 |
2017 | 24 | 8.127 | 2.634 |
2018 | 24.4 | 7.468 | 2.652 |
2019 | 24.8 | 6.976 | 2.682 |
2020 | 22.7 |
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