Issue 22, 2010
From the journal:

Dalton Transactions

A fluorescent bis(benzoxazole) ligand: Toward binuclear Zn(II)–Zn(ii)assembly†

Qinghui Chu,a   Doug A. Medvetz,a   Matthew J. Panznera  and  Yi Pang*a  

* Corresponding authors

a Department of Chemistry & Maurice Morton Institute of Polymer Science, The University of Akron, Akron, OH, USA

Abstract

A bis(benzoxazole) ligand (HL) has been synthesized, and its reaction with Zn(OAc)2 has led to fluorescent complexes via formation of binuclear Zn(II)–Zn(II) cores. The ligand-to-metal ratio of the complexes varies from 1 : 1 to 2 : 1, depending on the reaction conditions. A large binding constant K = 8.3 × 1020 [M−3] has been determined for the reaction L + Zn2+→L2:Zn22+. The result indicates that the bis(benzoxazole) ligand is a useful building block to construct a binuclear core. On the basis of X-ray analysis, the binuclear Zn(II)–Zn(II) distance in the complexes is determined to be ∼3.22 Å, which is quite comparable to that found in the enzymes (3.3 Å). Absorption and fluorescence study shows that a subtle chemical environmental change within the binuclear core can induce a large optical response.

Graphical abstract: A fluorescent bis(benzoxazole) ligand: Toward binuclear Zn(II)–Zn(ii) assembly

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Article information

DOI
https://doi.org/10.1039/C000989J
Article type
Paper
Submitted
15 Jan 2010
Accepted
01 Apr 2010
First published
04 May 2010

Dalton Trans., 2010,39, 5254-5259

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A fluorescent bis(benzoxazole) ligand: Toward binuclear Zn(II)–Zn(II) assembly

Q. Chu, D. A. Medvetz, M. J. Panzner and Y. Pang, Dalton Trans., 2010, 39, 5254 DOI: 10.1039/C000989J

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