Tetrameric self-assembly of a Cu(II) complex containing schiff-base ligand and its unusually high catecholase-like activity

Shuranjan Sarkar, Woo Ram Lee, Chang Seop Hong, Hong In Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report a new tetrameric supramolecular Cu(II) complex (Cu 4L4 = 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.

Original languageEnglish
Pages (from-to)2731-2736
Number of pages6
JournalBulletin of the Korean Chemical Society
Volume34
Issue number9
DOIs
Publication statusPublished - 2013 Sep 20

Fingerprint

ethylenediamine
Schiff Bases
Self assembly
Copper
Ligands
Paramagnetic resonance
Ions
Substrates
Air
3,5-di-tert-butylcatechol
1,2-dianilinoethane

Keywords

  • Catecholase
  • Cu(II) complex
  • Cu(II) EPR
  • N,O-ligand
  • Self-assembly

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Tetrameric self-assembly of a Cu(II) complex containing schiff-base ligand and its unusually high catecholase-like activity. / Sarkar, Shuranjan; Lee, Woo Ram; Hong, Chang Seop; Lee, Hong In.

In: Bulletin of the Korean Chemical Society, Vol. 34, No. 9, 20.09.2013, p. 2731-2736.

Research output: Contribution to journalArticle

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N2 - We report a new tetrameric supramolecular Cu(II) complex (Cu 4L4 = 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.

AB - We report a new tetrameric supramolecular Cu(II) complex (Cu 4L4 = 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.

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