title: Unprecedented Dual Light-Switching Response of a Metal Dipyridophenazine Complex toward Amyloid-β Aggregation.
abstract: Probes for monitoring protein aggregation with a variety of photophysical properties are of importance for the fundamental understanding of the aggregation process as well as for drug discovery. In this manuscript we report the photoluminescence response of the metal dipyridophenazine complex [Re(CO)3(dppz)(Py)](+) in the presence of aggregated Aβ. [Re(CO)3(dppz)(Py)](+) shows an instantaneous increase in photoluminescence with fibrillar Aβ (primary light-switching), and an unprecedented further increase in photoluminescence upon light irradiation at 362 nm (secondary light switching). The total increase in photoluminescence amounts to 105-fold, which we show can be used to monitor Aβ aggregation in real time.
authors.affiliation: Departments of Chemistry, ‡Bioengineering, §Materials Science & Nanoengineering, and #Shared Equipment Authority, Rice University , Houston, Texas 77005, United States.
authors.forename: Amir
authors.initials: A
authors.lastname: Aliyan
authors.affiliation: Departments of Chemistry, ‡Bioengineering, §Materials Science & Nanoengineering, and #Shared Equipment Authority, Rice University , Houston, Texas 77005, United States.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Kirby
authors.affiliation: Departments of Chemistry, ‡Bioengineering, §Materials Science & Nanoengineering, and #Shared Equipment Authority, Rice University , Houston, Texas 77005, United States.
authors.forename: Christopher
authors.initials: C
authors.lastname: Pennington
authors.affiliation: Departments of Chemistry, ‡Bioengineering, §Materials Science & Nanoengineering, and #Shared Equipment Authority, Rice University , Houston, Texas 77005, United States.
authors.forename: Angel A
authors.initials: AA
authors.lastname: Martí
mesh_terms: D016229:Amyloid beta-Peptides / Q000737:chemistry*; D008027:Light; D009942:Organometallic Compounds / Q000737:chemistry*; D010619:Phenazines / Q000737:chemistry*; D066329:Protein Aggregates / Q000528:radiation effects*
chemical_list: D016229:Amyloid beta-Peptides; D009942:Organometallic Compounds; D010619:Phenazines; D066329:Protein Aggregates; C000598831:phenazine