Issue 6, 2012
From the journal:

Dalton Transactions

The synthesis and photophysical studies of cyclometalated Pt(ii) complexes with C,N,N-ligands containing imidazolyl donors†

Yu-Man Ho,a   Chi-Kin Koo,a   Ka-Leung Wong,b   Hoi-Kuan Kong,a   Chris Tsz-Leung Chan,c   Wai-Ming Kwok,c   Cheuk-Fai Chow,a   Michael Hon-Wah Lam*a  and  Wai-Yeung Wongb  

* Corresponding authors

a Department of Biology & Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
E-mail: bhmhwlam@cityu.edu.hk

b Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong SAR, China

c Department of Applied Biology & Chemical technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China

Abstract

Two new C,N,N-type ligands (HL2 and HL3), containing a Cphenyl, a Npyridyl, and a Nimidazolyl donor, and their cycloplatinated complexes, [Pt(L2)Cl] (1), [Pt(L3)Cl] (2), [Pt(L2)(PPh3)]+ (3) and [Pt(L3)(PPh3)]+ (4), have been successfully synthesized and characterized. Spectroscopic and 3MLCT luminescent properties of these Pt(II) cyclometalated complexes were found to be pH dependent. This was attributed to the protonation/deprotonation of the acidic 1-imidazolyl-NH moieties on the ligands. All the cycloplatinated complexes (both protonated and deprotonated forms) possessed two-photon excitability with two-photon absorption cross-sections ranging from 6.0 to 30.0 GM (protonated forms) and from 16.2 to 24.9 GM (deprotonated forms).

Graphical abstract: The synthesis and photophysical studies of cyclometalated Pt(ii) complexes with C,N,N-ligands containing imidazolyl donors

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Article information

DOI
https://doi.org/10.1039/C1DT11037C
Article type
Paper
Submitted
03 Jun 2011
Accepted
04 Nov 2011
First published
13 Dec 2011

Dalton Trans., 2012,41, 1792-1800

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The synthesis and photophysical studies of cyclometalated Pt(II) complexes with C,N,N-ligands containing imidazolyl donors

Y. Ho, C. Koo, K. Wong, H. Kong, C. T. Chan, W. Kwok, C. Chow, M. H. Lam and W. Wong, Dalton Trans., 2012, 41, 1792 DOI: 10.1039/C1DT11037C

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