| Summary: | 碩士 === 國立中正大學 === 化學所 === 98 === The research project in this thesis was classified into two parts. The first part was to utilize the designed pyridylethynylbenzenes as bridging ligands for the construction of gold(I) supermolecules, 1-6. In addition to structural properties, we also study their absorption and fluorescence spectra of complexes 1-6. These gold(I) complexes contain both molecular-rectangle cavitiess and ethynyl units in the bridging ligands, and therefore we also carried out the recognition studies toward Cu+, Ag+, H+, and Na+, The results show complexes 1,4 and 2, 5 with higher affinities toward Cu+, H+ and H+, respectively, but complexes 3, 6 with no affinity toward the cations examined in this study.
In the second part, a series of Re(I) complexes with 2-pyridin-2-yl-1H-benzoimidazole, 7-9, have been synthesized and craracterized by the X-ray diffraction. Complexes 7 and 9 display luminescence both in the solid state and in solution, but complex 8 only shows poor luminescence. The luminescence quenching mechanism of 8 is explained by the intraligand charge-transfer (ICT) pathway, which originate from the fact that the deprotonation of imidazole led to formation of an imidazolate to induce luminescence quenching. Since complex 8 has an anionic imidazolate moiety as a metal-ion binding site, we also set out to examine its sensory application toward the metal ions of Hg2+、Cu2+、and Pb2+ in quantitative analysis. Moreover, we used complex 8 to react with PP(Au(PPh3)2 (PP = … (dppm); … (dppp)) to synthesize complex 10. Complex 10 was a novel mixed metal supermolecule, which also displays bright fluorescence.
|
|---|
