Abstract
Luminescent material Hexanuclear 6-Methylpyridinethiolato-Copper (I) has been investigated by measuring the photoluminescence spectra, their temperature dependence, temporal profiles and excitation spectra. Luminescence peaks appear at 1.88 eV at room temperature, and at about 2.2 eV below the liquid nitrogen temperatures. The origin of these two bands have been assigned to the transition within the metal-cluster center (CC) and that due to the metal to ligand charge transfer (CT). These origins have been examined by changing the ligand constitution from [Cu 6 (6-mpyt) 6 ] to [Cu 6 (4-6-mpyt) 6 ]. The observed change in the luminescence spectra confirms the validity of the assignment. The configuration coordinate model based on the experimental results is presented.
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