Supramolecular assembly of a new squaraine and β-cyclodextrin for detection of thiol-containing amino acids in water

Chao Luo Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China

Qianxiong Zhou Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China

Wanhua Lei Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China

Jianguang Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China

Baowen Zhang Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China

Xuesong Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. ChinaCorrespondence[email protected] [email protected]

Abstract

A new unsymmetrical aniline-based squaraine (SQ2) bearing binding unit of Hg²⁺ ion was designed and synthesised. SQ2 can form 1:2 inclusion complex with β-cyclodextrin, and the resulting complex, which undergoes absorption and fluorescence bleaching upon binding Hg²⁺, can serve as a turn-on colorimetric or fluorescent chemosensor in organic solvent-free aqueous solution for thiol-containing amino acids with high selectivity and tunable measuring range.

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Acknowledgements

We greatly appreciate the financial support from NNSFC (20873170, 20772133) and CAS (KJCX2-YW-H08, KGCX2-YW-389).

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Supramolecular assembly of a new squaraine and β-cyclodextrin for detection of thiol-containing amino acids in water

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Supramolecular assembly of a new squaraine and β-cyclodextrin for detection of thiol-containing amino acids in water

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