Photophysics of platinum-acetylide substituted hexa-peri-hexabenzocoronenes

被引：52

作者：

Kim, KY ^{[1
]}

Liu, SX ^{[1
]}

Kose, ME ^{[1
]}

Schanze, KS ^{[1
]}

机构：

[1] Univ Florida, Dept Chem, Gainesville, FL 32611 USA

来源：

INORGANIC CHEMISTRY | 2006年 / 45卷 / 06期

关键词：

D O I：

10.1021/ic051788v

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This manuscript reports the synthesis and photophysical investigation of two hexa-peri-hexabenzocoronenes (HBCs) that are functionalized with platinum(II) acetylide units of the type trans-(Ar-C equivalent to C-)(2)Pt(PBu3)(2). In one complex, the platinum is directly linked to the HBC chromophore by an ethynyl spacer, whereas in the second, the platinum is separated from the HBC via a 1,4-phenylene ethynylene spacer. The Pt-acetylide units introduce strong spin-orbit coupling into the HBC chromophore, giving rise to high yields of the triplet excited state along with moderately intense phosphorescence at ambient temperature. On the basis of emission spectroscopy, the triplet state of the HBC chromophore is located at 2.14 eV and the S-T splitting is 0.6 eV. The triplet-triplet absorption and radical cation absorption spectra of the Pt-HBCs are determined by laser flash photolysis. Aggregation of the Pt-HBCs in a poor solvent such as hexane leads to quenching of the triplet state, but spectroscopy provides no evidence for the formation of a triplet excimer, even under conditions where the molecules are strongly aggregated.

引用

页码：2509 / 2519

页数：11

共 52 条

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