Volume 57, Issue 25 pp. 7473-7477
Communication

Enhancing the Anti-Solvatochromic Two-Photon Fluorescence for Cirrhosis Imaging by Forming a Hydrogen-Bond Network

Tian-Bing Ren

Tian-Bing Ren

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

These authors contributed equally to this work.

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Dr. Wang Xu

Dr. Wang Xu

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

These authors contributed equally to this work.

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Qian-Ling Zhang

Qian-Ling Zhang

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

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Xing-Xing Zhang

Xing-Xing Zhang

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

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Si-Yu Wen

Si-Yu Wen

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

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Dr. Hai-Bo Yi

Dr. Hai-Bo Yi

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

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Prof. Dr. Lin Yuan

Corresponding Author

Prof. Dr. Lin Yuan

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

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Prof. Dr. Xiao-Bing Zhang

Prof. Dr. Xiao-Bing Zhang

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China

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First published: 23 April 2018
Citations: 106

Graphical Abstract

Turn bane into a boon: A unique class of two-photon dyes with anti-solvatochromic fluorescence, optically tunable groups, high fluorescence quantum yields, and large two-photon action cross sections in water are developed. Their use for in vivo imaging, was demonstrated in the monitoring of endogenous H2S generation and scavenging in the cirrhotic rat liver.

Abstract

Two-photon imaging is an emerging tool for biomedical research and clinical diagnostics. Electron donor–acceptor (D–A) type molecules are the most widely employed two-photon scaffolds. However, current D–A type fluorophores suffer from solvatochromic quenching in aqueous biological samples. To address this issue, we devised a novel class of D–A type green fluorescent protein (GFP) chromophore analogues that form a hydrogen-bond network in water to improve the two-photon efficiency. Our design results in two-photon chalcone (TPC) dyes with 0.80 quantum yield and large two-photon action cross section (210 GM) in water. This strategy to form hydrogen bonds can be generalized to design two-photon materials with anti-solvatochromic fluorescence. To demonstrate the improved in vivo imaging, we designed a sulfide probe based on TPC dyes and monitored endogenous H2S generation and scavenging in the cirrhotic rat liver for the first time.

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