Dimeric FeFe-hydrogenase mimics bearing carboxylic acids: Synthesis and electrochemical investigation
作者:Benjamin R. Garrett、Amneh Awad、Mingfu He、Kevin A. Click、Christopher B. Durr、Judith C. Gallucci、Christopher M. Hadad、Yiying Wu
DOI:10.1016/j.poly.2015.08.019
日期:2016.1
Hydrogen is expected to be important for future sustainable energy applications. Recent interest in adsorbing water splitting catalysts on a semiconductor surface for electrocatalytic hydrogen production warrants careful study of electrocatalysts with functional groups capable of binding to a surface. The monomeric complex Fe-2(mu-S-2(CH2)(3))(CO)(5)PPh2C6H4CO2H (S-2(CH2)(3) = 1,3-propanedithiolate, pdt) and the dimeric complexes [Fe-2(mu-pdt)(CO)(5)}(2)(mu,kappa(1),kappa(1)-Ph2PCH2N(Ar)CH2PPh2)] (Ar = p-CO2H-Ph, 3,5-CO2HPh, p-CH2CO2HPh, m-CO2H-Ph) bearing carboxylic acid functional groups have been prepared. The first electrochemical study of these dimeric FeFe complexes indicate that the complexes degrade upon reduction to form the species [Fe-2(mu-Pdt)(CO)(4)(kappa(2)-Ph2PCH2N(Ar)CH2PPh2)]. A route is proposed for the formation of [Fe-2(mu-pdt)(CO)(4)(kappa(2)-Ph2PCH2N(Ar)CH2PPh2)] from [Fe-2(mu-pdt)(CO)(5)}(2)(mu,kappa(1),kappa(1)-Ph2PCH2N(Ar)CH2PPh2)] and a crystal structure of an intermediate in the proposed electrochemical degradation pathway is presented. The electrochemical study presented herein provides valuable insight into degradation pathways of FeFe hydrogenase mimics bearing carboxylic acids amenable to surface immobilization. (C) 2015 Elsevier Ltd. All rights reserved.
Complexes derived from 4-(diphenylphosphino)benzoic acid and related ligands that contain mixed-metal assemblies of palladium(II) or gold(I) in combination with the multiply bonded dirhenium(II) unit
作者:Shan-Ming Kuang、Phillip E Fanwick、Richard A Walton
DOI:10.1016/s0020-1693(02)00983-0
日期:2002.10
CC 6 H 4 4-PPh 2 ) 2 Cl 2 (μ-dppE) 2 ( 6 ) and trans -Re 2 (μ-O 2 CC 10 H 6 N) 2 Cl 2 (μ-dppE) 2 ( 7 ), respectively. The ability of the unbound ligand functionality on the μ-carboxylate ligands in complexes 1 – 7 to be used to form mixed-metal complexes is demonstrated by the reactions of 1 and 6 with AuCl(tht) (tht=tetrahydrothiophene) to give cis -Re 2 (μ-O 2 CC 6 H 4 4-PPh 2 ) 2 Cl 2 (μ-dppm)
摘要顺式-Re 2(μ-O2 CCH 3)2 Cl 2(μ-dppm)2(dppm = Ph 2 PCH 2 PPh 2)与4-XC 6 H 4 CO 2型取代苯甲酸的反应H(X = Ph 2 P,Ph 2 P(O),Ph 2 P(S)或Ph 2 P(O)CH 2)并与喹啉-4-羧酸一起提供顺式-Re 2(μ-O 2 CC 6 H 44-X)2 CI 2(μ-dppm)2(X = Ph 2 P(1),Ph 2 P(O)(2),Ph 2 P(S)(3)或Ph 2 P(O)CH 2(4))和顺式-Re 2(μ-O2 CC 10 H 6 N)2 Cl 2(μ-dppm)2(5)。反式-Re 2(μ-O2 CCH 3)2 Cl 2(μ-dppE)2(dppE = Ph 2 PC(CH2)PPh 2)与4-Ph 2 PC 6 H 4 CO 2 H的相似反应和喹啉-4-羧酸生成反式-Re 2(μ-O2
New functionalised ditertiary phosphines via phosphorus based Mannich condensation reactions
作者:Sean E. Durran、Mark R.J. Elsegood、Neil Hawkins、Martin B. Smith、Salem Talib
DOI:10.1016/s0040-4039(03)01273-5
日期:2003.7
The one-step synthesis of a family of functionalised ditertiary aminophosphines are described including the X-ray crystal structure of 4-(Ph2PCH2)2N}C6H4CO2H.
描述了包括4-(Ph 2 PCH 2)2 N} C 6 H 4 CO 2 H的X射线晶体结构的功能化二叔氨基膦家族的一步合成。