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It was found that the emission intensity from the dyad increased in tetrahydrofuran (THF), acetone and dichloromethane with increasing incubation time. From the mechanistic studies, it was suggested that agglomeration of the dyad gradually proceeded in these media, followed by expression of excimer luminescence. Additionally, it was shown that the rates of TDEE of the dyad were sensitively accelerated in the presence of a trace amount of water. Based on this fact, a detection system for water contents in acetone was constructed. Before and after incubation for 96\u2005h at room temperature, time courses of changes in optical properties were monitored. Finally, water contents in acetone can be estimated by the degrees of TDEE and emission color changes in the range from 0.1\u2005wt\u2009% to 2.0\u2005wt\u2009% and from 2.0\u2005wt\u2009% to 20\u2005wt\u2009%, respectively.<\/jats:p>","DOI":"10.1002\/asia.201900396","type":"journal-article","created":{"date-parts":[[2019,3,20]],"date-time":"2019-03-20T22:52:01Z","timestamp":1553122321000},"page":"1577-1581","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":43,"title":["Time\u2010Dependent Emission Enhancement of the Ethynylpyrene\u2010<i>o<\/i>\u2010Carborane Dyad and Its Application as a Luminescent Color Sensor for Evaluating Water Contents in Organic Solvents"],"prefix":"10.1002","volume":"14","author":[{"given":"Kenta","family":"Nishino","sequence":"first","affiliation":[{"name":"Department of Polymer Chemistry Graduate School of Engineering Kyoto University  Katsura, Nishikyo-ku Kyoto 615\u20138510 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