Fluorescence and NMR Binding Studies of N-Aryl-N‘-(9-methylanthryl)diaza-18-crown-6 Derivatives
- 31 May 2003
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Organic Chemistry
- Vol. 68 (13) , 5369-5376
- https://doi.org/10.1021/jo030060y
Abstract
N-Aryl-N‘-(9-methylanthryl)diaza-18-crown-6 derivatives perform as fluorescent photoinduced electron-transfer (PET) sensors with very selective response toward Ca2+ versus Mg2+, Na+, and K+. The fluorescence intensity was increased by a factor of up to 170 in the presence of Ca(ClO4)2. 1H NMR studies show that metal cations affect these molecules very differently: Ca2+ has a global effect on each molecule, while Mg2+ affects part of each molecule, and K+ and Na+ affect each molecule moderately, which is very consistent with the fluorescence response.Keywords
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