title: Fluorescent Recognition of Zn2+by Two Diastereomeric Salicylaldimines: Dramatically Different Responses and Spectroscopic Investigation.
abstract: Fluorescence responses of two BINOL-based diastereomeric salicylaldimines toward a variety of metal cations have been studied in methanol solution. It is revealed that both compounds show great fluorescence enhancements in the presence of Zn2+but not with any other metal ions. Moreover, these two diastereomers exhibit dramatically different responses toward Zn2+under the same conditions. That is, one can produce much stronger fluorescence enhancement also at a longer wavelength than the other. This fluorescence recognition of Zn2+also shows distinctive color changes under a UV lamp. Mass and NMR spectroscopic analyses have been used to study the mechanism, which indicates the formation of 2+nZn2+complexes (n = 2, 3). This work has shed new light on the mechanism of an enantioselective fluorescent recognition of chiral amines promoted by Zn2+.
authors.affiliation: College of Chemical Engineering, Sichuan University , Chengdu, 610065, People's Republic of China.
authors.forename: Ting
authors.initials: T
authors.lastname: Song
authors.affiliation: College of Chemical Engineering, Sichuan University , Chengdu, 610065, People's Republic of China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Cao
authors.affiliation: College of Chemical Engineering, Sichuan University , Chengdu, 610065, People's Republic of China.
authors.forename: Gang
authors.initials: G
authors.lastname: Zhao
authors.affiliation: Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States.
authors.forename: Lin
authors.identifier: http://orcid.org/0000-0001-8698-3228
authors.initials: L
authors.lastname: Pu