The synthesis and photophysical studies of cyclometalated Pt(<scp>ii</scp>) complexes with C,N,N-ligands containing imidazolyl donors
作者: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
日期:——
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
含有C苯基,N吡啶基和N咪唑基供体的两个新的C,N,N型配体(H L 2和H L 3)及其环铂配合物[Pt(L 2)Cl](1),[Pt(L 3)Cl](2),[Pt(L 2)(PPh 3)] +(3)和[Pt(L 3)(PPh 3)] +(4),已成功合成和表征。这些Pt(II)环金属化配合物的光谱和3 MLCT发光特性被发现与pH有关。这归因于配体上的酸性1-咪唑基-NH部分的质子化/去质子化。所有的环铂配合物(质子化和去质子化形式)都具有双光子激发性,双光子吸收截面的范围为6.0至30.0 GM(质子化形式)和16.2至24.9 GM(去质子化形式)。