Ligand tuning of single-site manganese-based catalytic antioxidants with dual superoxide dismutase and catalase activity
作者:Michaela Grau、Francesco Rigodanza、Andrew J. P. White、Antonio Sorarù、Mauro Carraro、Marcella Bonchio、George J. P. Britovsek
DOI:10.1039/c4cc00758a
日期:——
A bio-inspired manganese(ii) complex with a linear pentadentateligand framework containing soft sulfur donors and an alternating NSNSN binding motif displays excellent dual CAT/SOD-like antioxidant activity with high turnover efficiency and good operation stability in an aqueous environment.
Synthesis of novel chiral polyamide macrocycles containing pyridyl side-arms and their molecular recognition properties
作者:Xiao Chen、Da-Ming Du、Wen-Ting Hua
DOI:10.1016/s0957-4166(03)00173-3
日期:2003.4
Seven novel C-2-symmetrical macrocycles containing pyridyl units have been prepared by the cyclic condensation of homochiral diamide intermediates with 2,6-pyridinedicarbonyl dichloride under high dilution at room temperature. The molecular recognition of these homochiral macrocycles for amino acid derivatives has been characterized by various spectroscopic methods such as IR, FAB-MS, fluorescence and UV-vis. The macrocycle 11 exhibited significant chiral recognition towards the enantiomers Of D- and L-alanine methyl ester hydrochlorides for which association constants have been determined. Molecular modeling was also used to simulate the interaction mode between the hosts and the guests. (C) 2003 Elsevier Science Ltd. All rights reserved.