ABSORPTION-SPECTRA, LUMINESCENCE PROPERTIES, AND ELECTROCHEMICAL-BEHAVIOR OF TRIS-HETEROLEPTIC RUTHENIUM(II) POLYPYRIDINE COMPLEXES
ABSORPTION-SPECTRA, LUMINESCENCE PROPERTIES, AND ELECTROCHEMICAL-BEHAVIOR OF TRIS-HETEROLEPTIC RUTHENIUM(II) POLYPYRIDINE COMPLEXES
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DOI：
10.1021/ic00293a043
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发表时间：
1988-10-05
影响因子：
4.6
通讯作者：
VONZELEWSKY, A
中科院分区：
文献类型：
--
作者：
JURIS, A;CAMPAGNA, S;VONZELEWSKY, A
结果所有配合物在溶剂中至少热稳定20 h，其吸收光谱均保持恒定。然而，在光激发下观察到光谱变化，导致溶剂分子取代了空间位阻的biq配体。11在室温下，9种络合物在乙腈溶液中的吸收光谱显示出大量的谱带。作为典型示例，图2显示了Ru（bpy）（biq）（f-biq）2+、Ru（bpy）（biq）（pzpm）2+和Ru（bpy）（biq）（biimH 2）2+的全光谱。最低能量吸收最大值的波长和消光系数收集在表I中。所有的配合物在77 K的MeOH/EtOH刚性基质中和室温的乙腈溶液中均显示出发光。在所有情况下，只有一个发射带，这表明在77 K的振动结构的一些证据。在室温下，振动结构消失，半宽增加，发射峰红移400-500 cm* 1。在77和300 K时的最大发射波长示于表1。
Results All the complexes examined were thermally stable in the solvents used for at least 20 h, as indicated by the constancy of their absorption spectra. Spectral changes, however, were observed upon light excitationleading to the replacement of the sterically de-manding biq ligand by solvent molecules. 11 The absorption spectra of the nine complexes in acetonitrile solution at room temperature show a great number of bands. The full spectra of Ru (bpy)(biq)(f-biq) 2+, Ru (bpy)(biq)(pzpm) 2+, andRu (bpy)(biq)(biimH2) 2+ are shown, as typical examples, in Figure 2. The wavelength and extinction coefficient of the lowest energy absorption maximum are gathered in Table I. All the complexes examined exhibit luminescence both in a MeOH/EtOH rigidmatrix at 77 K and in acetonitrile solution at room temperature. In all cases there is only one emission band, which shows some evidence of vibrational structure at77 K. At room temperature the vibrational structure disappears, the half-width increases, and the emissionmaximum is red-shifted by 400-500 cm* 1. The wavelengths of the emission maxima at 77 and 300 K are shown in TableI.