conversion to the product. Fluorescence quenching studies showed that the interaction between the donor and the acceptors are spontaneous. The results indicated that the progressive replacement of chlorine atom (-I effect) by methoxy group (+M effect) in the quinone decreased the electron acceptor property of the quinone. The results of the correlation of experimentally measured binding constants with electrochemical
采用UV-Vis,(1)H NMR,FT-IR,LC-MS和荧光光谱技术研究了
磺胺甲恶唑与不同数量的甲氧基/
氯取代的1,4-苯醌(MQ1-4)和表征反应产物。发现MQ1-4与
磺胺甲基异恶唑(SULF)的相互作用通过形成包含自由基阴离子的供体-受体配合物及其转化为产物而进行。荧光猝灭研究表明,供体和受体之间的相互作用是自发的。结果表明,醌中的甲氧基(+ M效应)逐渐取代
氯原子(-I效应),降低了醌的电子受体性能。