Interaction of free functional group with platinum(II) center in cyclometalated complexes: A structural and photophysical property investigation
Interaction of free functional group with platinum(II) center in cyclometalated complexes: A structural and photophysical property investigation
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DOI：
10.1016/j.ica.2009.10.021
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发表时间：
2010-01
影响因子：
2.8
通讯作者：
Jun-feng Zhang;Gan Xin;Wen‐Fu Fu;Han Xu;L. Li
中科院分区：
文献类型：
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作者：
Jun-feng Zhang;Gan Xin;Wen‐Fu Fu;Han Xu;L. Li
合成了一系列含N，P给体的柔性多齿配体2-[N-（二苯基膦基）甲基]氨基吡啶（L1）、2-[N-二（二苯基膦基）甲基]氨基吡啶（L2）、2-[N-（二苯基膦基）甲基]氨基-7-甲基-1，8-萘啶（L3）和4-[（N-二苯基膦基）甲基]氨基吡啶）（L4）。制备了单核和双核环金属化铂（II）配合物[Pt（C^N^N）L1] ClO 4（HC^N^N=6-苯基-2，2 '-联吡啶）、[Pt 2（C^N^N）2L 1]（ClO 4）2、[Pt 2（C^N^N）2L 2]（ClO 4）2、[Pt（C^N^N）L3] ClO 4和[Pt 2（C^N^N）2L 4]（ClO 4）2，并通过X射线晶体分析确定了它们的结构。这些配合物在室温下固态下具有长寿命的明亮的橙子发射，范围为560 - 610 nm。在溶液中，双核配合物具有比单核配合物更高的量子产率的发射。这可能是由于自由官能团与Pt（II）轴向位置的分子内相互作用，导致3 MLCT激发态的Pt（II）配合物磷光猝灭。
A series of flexible multidentate ligands containing N,P-donor, 2-[N-(diphenylphosphino)methyl]amino-pyridine (L1), 2-[N-bi-(diphenylphosphino) methyl]amino-pyridine (L2), 2-[N-(diphenylphosphino)methyl]amino-7-methyl-1,8-naphthyridine (L3) and 4-[(N-diphenylphosphino)methyl]amino-pyridine) (L4) have been synthesized. The mono- and dinuclear cyclometalated platinum(II) complexes [Pt(C^N^N)L1]ClO4(HC^N^N=6-phenyl-2,2′-bipyridine), [Pt2(C^N^N)2L1](ClO4)2, [Pt2(C^N^N)2L2](ClO4)2, [Pt(C^N^N)L3]ClO4and [Pt2(C^N^N)2L4](ClO4)2were prepared and their structures determined by X-ray crystal analysis. These complexes exhibit long-lived bright orange emissions ranging from 560 to 610nm in the solid state at room temperature. In solution, dinuclear complexes have emissions with higher quantum yields than mononuclear complexes. This can be attributed to intramolecular interaction of free functional group with Pt(II) at axial position, resulting in the quenching of phosphorescence for platinum(II) complexes in the3MLCT excited state.