The applications of supramolecular metal-peptide assemblies as catalyst or catalyst precursor have recent attracted increasing attentions.In this work,a fragment of the amyloid β-peptide,NH_(2)-KLVFF-COOH,was assembl...The applications of supramolecular metal-peptide assemblies as catalyst or catalyst precursor have recent attracted increasing attentions.In this work,a fragment of the amyloid β-peptide,NH_(2)-KLVFF-COOH,was assembled into nanofilms with encapsulated Pd,Pt and Au nanoparticles(NPs)via a one-step room temperature electron induction method.The effects of building block,intermolecular interaction,driving force and side-chain on the assembly were investigated.The assembly mechanism was thereby proposed.The crosslinking of peptide monomers results in mainly random and unordered structures.The obtained metal-peptide assemblies are extremely stable in water at neutral pH for long term.However,the metal NPs are able to be responsively released under basic and reductive conditions.The released NPs show a high activity to catalyze the reduction of 4-nitrophenol.The present studies on assembly mechanism and responsive release will be helpful for the design of organic skeletons and also for the future development of peptide stabilized metallic NPs with applications beyond catalysts.展开更多
文摘The applications of supramolecular metal-peptide assemblies as catalyst or catalyst precursor have recent attracted increasing attentions.In this work,a fragment of the amyloid β-peptide,NH_(2)-KLVFF-COOH,was assembled into nanofilms with encapsulated Pd,Pt and Au nanoparticles(NPs)via a one-step room temperature electron induction method.The effects of building block,intermolecular interaction,driving force and side-chain on the assembly were investigated.The assembly mechanism was thereby proposed.The crosslinking of peptide monomers results in mainly random and unordered structures.The obtained metal-peptide assemblies are extremely stable in water at neutral pH for long term.However,the metal NPs are able to be responsively released under basic and reductive conditions.The released NPs show a high activity to catalyze the reduction of 4-nitrophenol.The present studies on assembly mechanism and responsive release will be helpful for the design of organic skeletons and also for the future development of peptide stabilized metallic NPs with applications beyond catalysts.
