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Obituary
Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Short Paper | Regular issue | Vol 94, No. 9, 2017, pp.1719-1727
Published online, 14th July, 2017
Published online, 14th July, 2017
DOI: 10.3987/COM-15-13242
■ A New Fluorescence Chemosensor for Hg2+ Based on Carbazole and Thiourea
Fang-fang Yin, Wei-ju Zhu, Min Fang, Zhen-yu Wu, Ying Xu, Hai-lun Wang, Yao Wang, and Cun Li*
*School of Chemistry and Chemical Engineering & Anhui Province Key Laboratory of Environmental-friendly Polymer Materials, Anhui University, Hefei 230601, China
Abstract
A new thiourea-based Schiff-base (L) as a fluorescent chemosensor has been designed and synthesized, which exhibits selectivity toward Hg2+ by forming a 1:2 compound based on the method of Job’s plot. The detection limit was calculated to be 6.5×10-6 mol/L. The prominent recognizable changes of L could be observed by the naked eyes and fluorescence sensing conditions. The color of the L solution changed instantly from colorless to yellow after adding Hg2+ and returned to colorless by adding I–. The coordination reaction was reversible.
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