Ultrasensitive water sensors based on fluorenone-tetraphenylethene AIE luminogens

Two solvatochromic fluorenone-tetraphenylethene luminogens, 2-(4-(1,2,2-triphenylvinyl)phenyl)-9 H -fluoren-9-one (TPE-FO) and 2,7-bis(4-(1,2,2-triphenylvinyl)phenyl)-9 H -fluoren-9-one (TPE-FO-TPE), have been designed and synthesized, in which tetraphenylethene offers dual functions, i.e. , aggrega...

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Bibliographic Details
Published in:Materials chemistry frontiers 2017-09, Vol.1 (9), p.1841-1846
Main Authors: Chen, Tao, Chen, Ze-Qiang, Gong, Wen-Liang, Li, Chong, Zhu, Ming-Qiang
Format: Article
Language:English
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Summary:Two solvatochromic fluorenone-tetraphenylethene luminogens, 2-(4-(1,2,2-triphenylvinyl)phenyl)-9 H -fluoren-9-one (TPE-FO) and 2,7-bis(4-(1,2,2-triphenylvinyl)phenyl)-9 H -fluoren-9-one (TPE-FO-TPE), have been designed and synthesized, in which tetraphenylethene offers dual functions, i.e. , aggregation-induced emission (AIE) and electron donation. Both TPE-FO and TPE-FO-TPE exhibit pronounced solvatochromic effects and AIEE activity. The two luminogens exhibit ultra-high sensitivity to trace water in organic solvents such as THF or dioxane. The Stern–Volmer plots show good linear relationships with water fractions below 0.9%. The detection limit of TPE-FO for water in THF is calculated to be 11 ppm which is pretty close to that of Karl–Fischer titration.
ISSN:2052-1537
2052-1537
DOI:10.1039/C7QM00172J