Employing Cu(II) complexes of N,O-donor ligand for catalysis in visible light driven cleavage of lignin C-C bonds
作者:Rishi Ranjan、Argha Chakraborty、Rakesh Ganguly、Suman Mukhopadhyay
DOI:10.1016/j.mcat.2023.112947
日期:2023.2
[CuL(N3)]2 (2) have been obtained by reacting HL with Cu(II) salts. Under visible light irradiation, these catalysts can cleave the CC bonds of lignin in H2O as suggested by HPLC data. After completion of the reaction, the photo-catalysts could be recovered almost quantitatively and recycled for at least six times without much decrease in the catalytic efficiency. A plausible mechanistic pathway for the
过渡金属配合物催化的可见光辅助光反应最近对环境友好的可持续过程的发展有着巨大的需求。为了开发潜在的含铜光催化剂,席夫碱配体即。合成并表征了2-[((3-(二甲基氨基)-2,2-二甲基丙基)亚氨基)(苯基)甲基]苯酚(HL) 。HL与Cu(II)盐反应得到了两个双核铜配合物[Cu(L)Cl] 2 ( 1 ) 和[CuL(N 3 )] 2 ( 2 )。在可见光照射下,这些催化剂可以裂解H 2中木质素的CC键O 如 HPLC 数据所示。反应完成后,光催化剂几乎可以定量回收并循环使用至少六次,而催化效率没有太大下降。通过 ESI-MS 光谱、NMR 光谱、UV-vis 和计算研究探索了降解反应的可能机制途径。光催化剂可以将高达 95% 的真实提取木质纤维素样品降解为有价值的化学物质。这些催化剂已显示出对阳光以及木质素降解的活性。