On the Biexponential Decay of the Photoluminescence of the Two Crystallographically-Independent Molecules in Crystals of [Cu(I)(phen)(PPh3)2][BF4]

被引：30

作者：

Coppens, Philip ^{[1
]}

Sokolow, Jesse ^{[1
]}

Trzop, Elzbieta ^{[1
]}

Makal, Anna ^{[1
]}

Chen, Yang ^{[1
]}

机构：

[1] SUNY Buffalo, Dept Chem, Buffalo, NY 14221 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2013年 / 4卷 / 04期

基金：

美国国家科学基金会;

关键词：

EXCITED-STATE STRUCTURE; COMPLEXES; EMISSION; LUMINESCENCE; SYSTEMS;

D O I：

10.1021/jz400013b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

[Cu(I)(phen)(PPh3)(2)][BF4] crystallizes with two nonsymmetry-related molecules in the asymmetric unit. Synchrotron time-resolved X-ray diffraction experiments have shown that the two independent molecules distort differently on MLCT excitation. The luminescence decay of the crystals is biexponential with two different Stokes-shifts, the more rapid decay corresponding to the shorter wavelength emission. Its amplitude diminishes rapidly with an increase in temperature, indicating that this emission is not due to a thermal activation to a higher state. The double emission is attributed to the presence of two independent molecules with drastically different pacicing environments. It is concluded that the solid-state environment must be analyzed whenever photochemical properties of molecular solids are reported.

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页码：579 / 582

页数：4

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