Probing the Quenching of Quantum Dot Photoluminescence by Peptide-Labeled Ruthenium(II) Complexes

摘要: Charge transfer processes with semiconductor quantum dots (QDs) have generated much interest for potential utility in energy conversion. Such configurations are generally nonbiological; however, recent studies shown that a redox-active ruthenium(II)–phenanthroline complex (Ru2+-phen) is particularly efficient at quenching the photoluminescence (PL) of QDs, and this mechanism demonstrates good application as generalized biosensing detection modality since it aqueous compatible. Multiple possibilities charge and/or mechanisms exist within type assembly, there currently limited understanding underlying photophysical such biocomposite systems where nanomaterials directly interfaced biomolecules proteins. Here, we utilize redox reactions, steady-state absorption, PL spectroscopy, time-resolved femtosecond transient absorption spectroscopy (FSTA) to investigate biologic...