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 Chow, Michael Hon Wah Lam, Wai Yeung Wong

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14 Citations (Scopus)


Two new C,N,N-type ligands (HL2and HL3), containing a Cphenyl, a Npyridyl, and a Nimidazolyldonor, 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 and3MLCT 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).
Original languageEnglish
Pages (from-to)1792-1800
Number of pages9
JournalDalton Transactions
Issue number6
Publication statusPublished - 14 Feb 2012

ASJC Scopus subject areas

  • Inorganic Chemistry

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