title: Chiroptical switches: applications in sensing and catalysis.
abstract: Chiroptical switches have found application in the detection of a multitude of different analytes with a high level of sensitivity and in asymmetric catalysis to offer switchable stereoselectivity. A wide range of scaffolds have been employed that respond to metals, small molecules, anions and other analytes. Not only have chiroptical systems been used to detect the presence of analytes, but also other properties such as oxidation state and other physical phenomena that influence helicity and conformation of molecules and materials. Moreover, the tunable responses of many such chiroptical switches enable them to be used in the controlled production of either enantiomer or diastereomer at will in many important organic reactions from a single chiral catalyst through selective use of a low-cost inducer: Co-catalysts (guests), metal ions, counter ions or anions, redox agents or electrochemical potential, solvents, mechanical forces, temperature or electromagnetic radiation.
authors.affiliation: Department of Chemistry and Physical Sciences, Pace University, 1 Pace Plaza, New York, NY 10038, USA. zdai@pace.edu
authors.forename: Zhaohua
authors.initials: Z
authors.lastname: Dai
authors.forename: Jennifer
authors.initials: J
authors.lastname: Lee
authors.forename: Wenyao
authors.initials: W
authors.lastname: Zhang
mesh_terms: D002384:Catalysis; D002942:Circular Dichroism; D057230:Limit of Detection; D055095:Optics and Photonics; D013056:Spectrophotometry, Ultraviolet