Fluorescence turn on of coumarin derivatives by metal cations: a new signaling mechanism based on C=N isomerization.
Org Lett
; 9(1): 33-6, 2007 Jan 04.
Article
in En
| MEDLINE
| ID: mdl-17192078
ABSTRACT
[reaction see text] A new sensing mechanism based on C=N isomerization, which shows a very significant fluorescence enhancement to the metal cations in a simple and efficient way, is demonstrated. A coumarin derivative (L) containing a C=N group was designed as an example for illustration. The free ligand L is almost nonfluorescent due to the isomerization of C=N double bond in the excited state. However, the solution of ligand shows about a 200-fold increase of fluorescence quantum yield (about 30%) upon addition of Zn(ClO4)2.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Org Lett
Journal subject:
BIOQUIMICA
Year:
2007
Document type:
Article