Synthesis of [FeFe] Hydrogenase Mimics with Lipoic acid and its Selenium Analogue as Anchor Groups
作者:Stefan Benndorf、Sihem Groni、Leanne M. Stafast、Helmar Görls、Claire Fave、Bernd Schöllhorn、Wolfgang Weigand
DOI:10.1002/ejic.202200684
日期:——
[FeFe] hydrogenase (H2ase) mimicking complexes containing lipoic and selenolipoic acid moieties connected to 2-hydroxy-1,3-dithiopropane and 2-hydroxy-1,3-diselenopropane bridging ligands were synthesized and characterized. The elaboration of surface confined systems was studied in preliminary experiments. The [FeFe] H2ase mimics formed well-organized self-assembled monolayers on Pt electrodes.
The antioxidant effects of the butterfly cluster [(μ-SeCH2)2CH(OH)]Fe2(CO)6 on radical-induced oxidation of DNA
作者:Pei-Ze Li、Zai-Qun Liu
DOI:10.1007/s00044-012-0281-x
日期:2013.6
Hydrogenases have been researched in detail, but its protective effect on DNA against radical-induced oxidation was not usually found. [(mu-SeCH2)(2)CH(OH)]Fe-2(CO)(6) (SFOH) and [(mu-SeCH2)(2)CH(OOCCH3)]Fe-2(CO)(6) (SFOA) were synthesized. The hydroxyl group in SFOH was etherized to form SFOA, in which the potential antioxidant group was the [2Fe2Se] cluster. The antioxidant abilities of SFOH and SFOA together with 1,3-dibromo-2-propanol (DBPO) were compared in 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH)-induced oxidation of DNA. SFOH can protect DNA concentration dependently and scavenge 4.6 radicals in protecting DNA against AAPH-induced oxidation. However, SFOA and DBPO cannot protect DNA. These results revealed that the aliphatic hydroxyl group in [2Fe2Se] cluster was the antioxidant group of SFOH in protecting DNA against AAPH-induced oxidation. However, the [2Fe2Se] cluster can react with H2O2 to form hydroxyl radical ((OH)-O-center dot), which accelerated the oxidation of DNA. Therefore, the special ability of the [2Fe2Se] cluster may be as a functional group in designing organometallic medicines.