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由梁化舉著作·2006—香豆素；嘧啶；電致化學發光；超氧陰離子；coumarin；pyrimidine；ECL...在螢光光譜方面，放光波長隨推電子能力增強而有紅位移的趨勢。4PECs ...

In this dissertation, we report the photophysical, electrochemical, and electrogenerated chemiluminescence properties of a series Donor-π-Acceptor (D-π-A) systems, where D is H(H), Me(M), OMe(OM), OiPr(OP) or NMe2(DMA), π is phenylacetylene group, and A is coumarin or pyrimidine. Two coumarin systems, which differ in the position where theπ-D substituents attach to, are investigated. They are 4- and 8-substitued coumarins and referred to as 4PECs and 8PECs. The UV-Vis absorption maxima of 4PECs (λmaxabs = 316∼400 nm) are at longer wavelengths for those with stronger donors (i.e., H＜M＜OM＜OP＜DMN). However, except for 8PEC-DMA (λmaxabs = 324 nm), the absorption spectra of the other 8PECs are all similar. The fluorescence spectra of 4PECs and 8PECs are more sensitive to the nature of the donor group and they are red-shift with stronger donors. The reductive potentials for 4PECs and 8PECs are about -1.5 and -1.7 V, respectivel...