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

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 Stephen CHOW
, Michael Hon-Wah LAM
, Wai-Yeung WONG

Department of Science and Environmental Studies (SES)

Research output: Contribution to journal › Articles › peer-review

18 Citations (Scopus)

Abstract

Two new C,N,N-type ligands (HL₂ and HL₃), containing a C_phenyl, a N_pyridyl, and a N_imidazolyl 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 language	English
Pages (from-to)	1792-1800
Journal	Dalton Transactions
Volume	41
Issue number	6
Early online date	Dec 2012
DOIs	https://doi.org/10.1039/C1DT11037C
Publication status	Published - 2012

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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 (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 {\textcopyright} 2012 The Royal Society of Chemistry.",

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

year = "2012",

doi = "10.1039/C1DT11037C",

language = "English",

volume = "41",

pages = "1792--1800",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

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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 Stephen

AU - LAM, Michael Hon-Wah

AU - WONG, Wai-Yeung

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84856703102

U2 - 10.1039/C1DT11037C

DO - 10.1039/C1DT11037C

M3 - Articles

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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