Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 11, Issue 11, Pages 1805-1809Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ob27356c
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Funding
- US NSF [MRI-1040227]
- Camille Dreyfus Teacher Scholar Award
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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.
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