Flavin chromophores can mediate redox reactions upon irradiation by blue light. In an attempt to increase their catalytic efficacy, flavin derivatives bearing a guanidinium ion as oxoanion binding site were prepared. Chromophore and substrate binding site are linked by a rigid Kemp’s acid structure. The molecular structure of the new flavins was confirmed by an X-ray structure analysis and their photocatalytic activity was investigated in benzyl ester cleavage, nitroarene reduction and a Diels–Alder reaction. The modified flavins photocatalyze the reactions, but the introduced substrate binding site does not enhance their performance.
黄素色团可以在受到蓝光照射时介导氧化还原反应。为了增加它们的催化效率,制备了带有
鸟氨酸离子作为氧酸根结合位点的黄素衍
生物。色团和底物结合位点通过刚性的Kemp's酸结构连接。新黄素的分子结构经过X射线结构分析证实,并且它们的光催化活性在
苯甲酸酯裂解、硝基
芳烃还原和Diels-Alder反应中进行了研究。改性黄素光催化反应,但引入的底物结合位点并没有增强它们的性能。