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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 9
BKCSDE 34(9)
September 20, 2013 

 
Title
Tetrameric Self-Assembly of a Cu(II) Complex Containing Schiff-Base Ligand and Its Unusually High Catecholase-like Activity
Author
Shuranjan Sarkar, Woo Ram Lee, Chang Seop Hong, Hong-In Lee*
Keywords
Cu(II) complex, N,O-ligand, Self-assembly, Cu(II) EPR, Catecholase
Abstract
We report a new tetrameric supramolecular Cu(II) complex (Cu4L4 = tetrakis(N,N'-bis(salicylidene)-2,2'-ethylenedianiline) Copper(II)) with a Schiff-base ligand (H2L = N,N'-bis (salicylaldimine)-1,2-ethylenediamine) containing two N,O-bidentate chelate groups. Though the copper sites of Cu4L4 are non-coupled, the complex exhibits a unsually high catecholase-like activity (kcat = 935 h−1) when the Cu4L4 solution is treated with 3,5- di-tert-butylcatechol (3,5-DTBC) at basic condition in the presence of air. Combined information obtained from UV-VIS and EPR measurements could lead the suggestion of the reaction pathway in which the substrate may bind to Cu(II) ions by anti-anti didentate bridging mode.
Page
2731 - 2736
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