An acid catalyzed reversible ring-opening/ring-closure reaction involving a cyano-rhodamine spirolactam

被引:69
作者
Li, Honglin [1 ]
Guan, Hong [1 ]
Duan, Xinrui [1 ]
Hu, Jun [1 ]
Wang, Guiren [2 ,3 ]
Wang, Qian [1 ]
机构
[1] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA
[2] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA
[3] Univ S Carolina, Biomed Engn Program, Columbia, SC 29208 USA
关键词
FLUORESCENT-PROBES; PH; WATER; SOLVENT; CHEMOSENSORS; RECOGNITION; CYANAMIDE; SENSOR; CELLS; IONS;
D O I
10.1039/c3ob27356c
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Cyanamide was introduced into the rhodamine spirolactam framework to produce a colorless and non-fluorescent compound RBCN. It shows a reversible ring-opening/ring-closure process in response to the solution pH, which exhibits an "ON/OFF" switching in its fluorescence. Different from other rhodamine-type dyes, the ring-open form of RBCN is stable in protic solvents under neutral, near neutral and basic conditions, showing a pink color and very strong fluorescence. We also demonstrated the potential of RBCN in live cell imaging.
引用
收藏
页码:1805 / 1809
页数:5
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