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- W2023480981 abstract "Model complexes of [FeFe]-hydrogenase bearing carboxylic acid functionalities have been designed for applications toward immobilization of hydrogen production electrocatalysts on amino-functionalized carbon electrode surfaces. Using carboxylic acid-substituted thiols, complexes incorporating the −COOH moiety into the thiolate linkers have been synthesized: (μ-SCH2CH2COOH)2[Fe(CO)3]2 (1) and the previously known (μ-(SCH2)2CHCOOH)[Fe(CO)3]2 (2). Carboxylic acid units have also been introduced via ligand substitution with a tricarboxyethyl phosphine to generate (μ-pdt)[Fe(CO)3][Fe(CO)2{P(C2H4COOH)3}] (3). To mimic the linkage of complexes of these types to amino-functionalized monolayers, it has been demonstrated that 2 can be coupled with aniline in solution to generate (μ-(SCH2)2CHCONHPh)[Fe(CO)3]2 (4), and the stability of this linkage has been addressed. The carboxylic acid-substituted complex 2 undergoes ligand substitution with PMe3 to generate (μ-(SCH2)2CHCOOH)[Fe(CO)2(PMe3)]2 (5). Complex 5 can then be protonated in either methanol or tetrahydrofuran solvent to generate (μ-(SCH2)2CHCOOMe)(μ-H)[Fe(CO)2(PMe3)]2}PF6 (6) and (μ-(SCH2)2CHCOOH)(μ-H)[Fe(CO)2(PMe3)]2}PF6 (7), respectively, demonstrating that a range of carboxy-functionalized complexes can be synthesized. Structural characterization and cyclic voltammetry of these complexes indicate that the carboxylic acid functionality has little effect on the structure and reactivity of the diiron dithiolate core." @default.
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- W2023480981 date "2007-07-04" @default.
- W2023480981 modified "2023-10-11" @default.
- W2023480981 title "Synthesis of Carboxylic Acid-Modified [FeFe]-Hydrogenase Model Complexes Amenable to Surface Immobilization" @default.
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- W2023480981 doi "https://doi.org/10.1021/om7003354" @default.
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