The 2-(furan-2-yl)-3-hydroxy-4H-chromen-4-one and their substituted derivatives with electron donating and electron withdrawing groups have been synthesized. Free radical scavenging activity has been studied using 2,2-diphenyl-1-picrylhydrazine (DPPH). The kinetic studies and co-relation of excited state intramolecular proton transfer (ESIPT) with electron donating and electron withdrawing group explains the effect of these groups on percentage scavenging activity.
合成了 2-(
呋喃-2-基)-3-羟基-4H-苯并
吡喃-4-酮及其带有电子捐赠基团和电子撤回基团的取代衍
生物。使用 2,2
-二苯基-1-苦基
肼(
DPPH)对自由基清除活性进行了研究。动力学研究以及激发态分子内质子转移(ESI
PT)与电子捐赠基团和电子撤回基团的相互关系解释了这些基团对清除活性百分比的影响。