An ESIPT fluorescent dye based on HBI with high quantum yield and large Stokes shift for selective detection of Cys

作者：Zhang, Ying; Wang, Jun Hao; Zheng, Wenjie; Chen, Tianfeng; Tong, Qing Xiao^*; Li, Dan

来源：Journal of Materials Chemistry B, 2014, 2(26): 4159-4166.

DOI：10.1039/c4tb00190g

• Aqueous media
• Enhanced Emission
• Fluorescent dyes
• High selectivity
• Luminescent material
• pH value
• Selective detection
• Stokes shift

We report 3-(4,5-diphenyl-1H-imidazol-2-yl) naphthalen-2-ol (DPIN) as an interesting luminescent material displaying ESIPT with a large Stokes shift of similar to 180 nm even in protic/polar solvents. Stable homo-dispersed nanoparticles formed by inter-and intramolecular H-bonds in aqueous media and the corresponding aggregation induced enhanced emission with a high quantum yield up to 0.45 were observed. Factors such as pH value and ions (cations and anions) showed a negligible effect on the fluorescence performance. A probe of 3-(4,5-diphenyl-1H-imidazol-2-yl)naphthalen-2-yl-acrylate (DPIN-A) based on this molecule was designed. The results revealed that it can be used for sensing of Cys with high selectivity and sensitivity.

• 出版日期2014
• 单位暨南大学; 汕头大学