Synthesis and Characterization of Cobalt and Nickel Thiolate Complexes for Hydrogen evolution
| Autor: | Bo-HuaHuang, 黃柏華 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 A challenge to produce dihydrogen for renewable energy is to develop high efficient catalysts for proton reduction. The first-row transition metal complexes are ideal catalysts due to their low cost and high abundance in the earth. Based on this motivation, we have been aiming on develop nickel and cobalt catalysts that carry the reduction of proton to dihydrogen. In this study, bis(benzenethiolato)phosphine ligand derivative, [PS2”]H2 (PS2”H2 = [P(C6H5)(C6H3-3-Me3Si-2-SH)2]) was used to explore nickel and cobalt chemistry. A nickel(II) thiolate complex, [NiII(PSSH”)2] (1), was obtained by the reaction of nickel(II) species with [PS2”]H2. Complex 1 was characterized by X-ray crystallography, UV-vis-NIR spectrum, ESI-MS spectrum and NMR spectrum. Furthermore, complex 1 was found to react with oxygen and produce a nickel(IV) species, [NiIV(PS2”)2] (2). Complex 2 was characterized by X-ray crystallography, UV-vis-NIR spectrum, NMR spectrum and cyclic voltammetry. Importantly, the irradiation of complex 1 produced dihydrogen that was identified by gas chromatography. On the same time, complex 1 was changed to complex 2 that was characterized by ESI-MS spectrum. A dinickel(II) thiolate complex, [NiII(PS2”)2]2 (3), was obtained by the reaction of nickel(II) species with [PS2”]H2. The complex 3 was characterized by X-ray crystallography, UV-vis-NIR spectrum and NMR spectrum. A cobalt(III) thiolate complex, [PPh4][Co(PS2”)2] (4), was obtained by the reaction of cobalt(II) species with [PS2”]H2. The complex 4 was characterized by X-ray crystallography, element analysis, UV-vis-NIR spectrum, ESI-MS spectrum, NMR spectrum and cyclic voltammetry. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|