| Summary: | 碩士 === 國立成功大學 === 化學系碩博士班 === 90 ===
英文摘要
In this research, the complex Rh(bipy)(bzpy) ( where bipy is bipyridine, bzpy is ortho-C-deportonated form of 2-benzoylpyridine ) has been synthesized, and characterized with MS, IR, and NMR spectra. The structure of the complex is assigned as cisβ form isomer.
The carbonyl absorption of bzpy of the complex, about 1674 cm-1 in IR spectrum, indicates N-C- bonding to metal Rh(Ⅲ), not N-O bonding .
The bands (39.2~31.2 kK) show ππ* transitions in ligands of the complex exhibit strong absorption in the UV region (ε＞104 cm-1M-1 ). The dd* absorptions (25.0kk) of center metal are convered with the charge transfer signal. It’s difficult to distinguish clearly between the two absorptions under the long tail.
The luminescence is found at 77K in Me2SO .It exhibits a broad, symmetric, structure less emission (16.9~12.3 kK) with 58 μｓlifetime .The maximum emission intensity is about 14.3kK.The luminescence is assigned as dd* phosphorescence. The emission polarization spectrum of this complex in emission region is a linear curve whose slope is closed to zero, indicates a single emission.
The cyclic voltammorgrams of the complex shows three reduction waves between 0~-1.8 V vs. SCE in 0.1 TEAP/Me2SO. The first peak is constituted by two electronics reduction steps followed by fast elemination of chlorides. In the addition of phenol, the third is suggested to be a reductive process that one electron transfer to π* orbital at carbonyl of bzpy.
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