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An europium(III) hydrolytic catalyst favoring anionic phosphate esters over phosphate triester

Title
An europium(III) hydrolytic catalyst favoring anionic phosphate esters over phosphate triester
Authors
Yoon, CWOh, SJJeon, YJChoi, YSSon, YKHwangbo, SKu, JKPark, JW
POSTECH Authors
Park, JW
Date Issued
Jan-2001
Publisher
KOREAN CHEMICAL SOC
Abstract
A Cryptate (221) having a short alcohol pendant (2) was metallated with europium(III) in anhydrous condition, and its hydrolytic activity for phosphate esters at neutral pH was examined. While the activity for the phosphate diester and monoester is comparable to that of the parent metal complex [1Eu](3+), its hydrolytic activity towards a phosphate triester is significantly suppressed. Potentiometric titration and luminescence spectroscopic studies for the equilibrium behavior of the complex in solution suggest that a dimer formation through the metal hydroxides as well as the pendant alcohol is likely to happen. The low hydrolytic activity for the triester seems to be associated with the dimer formation.
Keywords
europium hydrolytic catalyst; phosphate esters; luminescence spectra; CARBOXYESTER HYDROLYSIS; DIESTER CLEAVAGE; RAPID CLEAVAGE; ZINC ENZYMES; METAL-IONS; COMPLEXES; MODEL; RNA; PENDANT; DNA
URI
http://oasis.postech.ac.kr/handle/2014.oak/19642
ISSN
0253-2964
Article Type
Article
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 22, no. 2, page. 199 - 204, 2001-01
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