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

doi:10.1039/c1dt11037c

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

Research output: Journal article publication › Journal article › Academic research › peer-review

18 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1792-1800
Number of pages	9
Journal	Dalton Transactions
Volume	41
Issue number	6
DOIs	https://doi.org/10.1039/c1dt11037c
Publication status	Published - 14 Feb 2012

ASJC Scopus subject areas

Inorganic Chemistry

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10.1039/c1dt11037c

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

abstract = "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).",

author = "Ho, \{Yu Man\} and Koo, \{Chi Kin\} and Wong, \{Ka Leung\} and Kong, \{Hoi Kuan\} and Chan, \{Chris Tsz Leung\} and Kwok, \{Wai Ming\} and Chow, \{Cheuk Fai\} and Lam, \{Michael Hon Wah\} and Wong, \{Wai Yeung\}",

year = "2012",

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language = "English",

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T1 - The synthesis and photophysical studies of cyclometalated Pt(ii) complexes with C,N,N-ligands containing imidazolyl donors

AU - Ho, Yu Man

AU - Koo, Chi Kin

AU - Wong, Ka Leung

AU - Kong, Hoi Kuan

AU - Chan, Chris Tsz Leung

AU - Kwok, Wai Ming

AU - Chow, Cheuk Fai

AU - Lam, Michael Hon Wah

AU - Wong, Wai Yeung

PY - 2012/2/14

Y1 - 2012/2/14

N2 - 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).

AB - 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).

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U2 - 10.1039/c1dt11037c

DO - 10.1039/c1dt11037c

M3 - Journal article

SN - 1477-9226

VL - 41

SP - 1792

EP - 1800

JO - Dalton Transactions

JF - Dalton Transactions

IS - 6

ER -

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

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