Design and synthesis of an <em>ortho</em>-phenylenediamine-based open cleft: a selective fluorescent chemosensor for dihydrogen phosphate期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

*Design and synthesis of an ortho-phenylenediamine-based open cleft: a selective fluorescent chemosensor for dihydrogen phosphate*

Authors:	Kumaresh Ghosh Indrajit Saha

Affiliation:	^a Department of Chemistry, University of Kalyani, Kalyani, Nadia 741 235, India ^b Department of Chemistry, University College of Science, 92 A. P. C. Road, Kolkata 700 009, India

Abstract:	A new ortho-phenylenediamine-based fluorescent cleft 1 has been designed and synthesized. The open cleft of 1 selectively recognizes tetrabutylammonium dihydrogen phosphate in CH₃CN by exhibiting a significant decrease in the emission of anthracene. The interactions of 1 are also investigated in aq CH₃OH where no measurable change in the emission is observed for tetrabutylammonium dihydrogen phosphate, although sodium salts of phosphate, hydrogen phosphate, and dihydrogen phosphate exhibit moderate changes. Tetrabutylammonium hydrogen sulfate is sensed effectively in aq CH₃OH. The anion binding properties of 1 were evaluated by ¹H NMR, UV-vis, and fluorescence spectroscopic methods.

Keywords:	Dihydrogen phosphate Fluoride Carboxylate recognition Hydrogen sulfate Anthracene Benzimidazole
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