Synthesis and Electrochemical Studies of Porphyrins Substituted with Nitrobenzenes
| Autor: | Yi-Ching Lin, 林毅青 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 We have synthesized symmetric and asymmetric free base porphyrins and their zinc complexes containing nitrophenyl and tolyl substituents. Electron-withdrawing substituents on the phenyl rings exert different electronic effects on the porphyrin core, depending on the ortho, para and meta positions. Cyclic voltammetry and spectroelectrochemistry was used to monitor the difference of redox potential and absorption spectra of those compounds. In addition, the cyclic voltammograms porphyrin and nitrophenyl group were overlapped in the reductive, therefore the electrochemical behaviors become complex. In order to resolve these overlapped problem, so we use titration method in cyclic voltammetry. 1,3-diphenylurea can form hydrogen bonding with nitrophenyl group and form anodic shift of the reductive potential. We hope this method can distinguish those potential be caused of someone. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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