Structure-Property Relationships in Conjugated Donor-Acceptor Molecules Based on Cyanoanthracene

• Main Authors: Jui-Hsien Lin, 林瑞僩
• Other Authors: 何東英
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/79302409604331728238

碩士 === 國立臺灣大學 === 化學研究所 === 93 === Two series of π-conjugated bipolar compounds namely 9-phenyl-10-anthronitriles (PANs) and 9-phenylethynyl-10-anthronitriles (PEANs) having inherent redox centers have been synthesized and their UV-Vis absorption, fluorescence emission and electrochemical behavior are studied. Electrochemiluminescence of these molecules bearing weak, strong and spin polarized donors is also studied. The observed electronic properties are explained by means of Density Functional Theory (DFT- B3LYP/6-31G*) calculations. The structure-property relationships of all the molecules are discussed. In this study, we checked absorption and emission spectra in various solvents by the UV-Vis and fluorescence spectrometer respectively. Quantum yield (Φ) and other photophysical properties were also studied by the data. We used Cyclic Voltammetry ( CV ) to determine the electrochemical activities of all compounds. And then we checked ECL properties by triple-potential step.(fluorescence spectrometer as detector.) In conclusion, PAN、AnAN、DMA-PAN and DMA-PEAN with energy sufficient to populate singlet state, thus they followed S-route emission. DTP-PAN、An2N-PAN、PEAN、AnEAN and DTP-PEAN show ECL emission red-shifted and energy deficient, thus they followed E-route emission. An2N-PEAN is no ECL emission.