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

Yu-Man HO, Chi-Kin KOO, Ka-Leung WONG, Hoi-Kuan KONG, Chris Tsz-Leung CHAN, Wai-Ming KWOK, Cheuk Fai Stephen CHOW, Michael Hon-Wah LAM, Wai-Yeung WONG

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13 Citations (Scopus)

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). Copyright © 2012 The Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)1792-1800
JournalDalton Transactions
Volume41
Issue number6
Early online dateDec 2012
DOIs
Publication statusPublished - 2012

Citation

Ho, Y.-M., Koo, C.-K., Wong, K.-L., Kong, H.-K., Chan, C. T.-L., Kwok, W.-M., . . . Wong, W.-Y. (2012). The synthesis and photophysical studies of cyclometalated Pt(II) complexes with C,N,N-ligands containing imidazolyl donors. Dalton Transactions, 41(6), 1792-1800. doi: 10.1039/C1DT11037C

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