Cyclic Kinetics during Thermal Equilibration of an Axially Chiral Bis-Spiropyran
作者:Pintu K. Kundu、Avishai Lerner、Kristina Kučanda、Gregory Leitus、Rafal Klajn
DOI:10.1021/ja505948q
日期:2014.8.13
A compound combining the features of a molecular rotor and a photoswitch was synthesized and was shown to exist as three diastereomers, which interconvert via a reversible cyclic reaction scheme. Each of the three diastereomers was isolated, and by following the equilibration kinetics, activation barriers for all reactions were calculated. The results indicate that the properties of molecular switches depend heavily on their immediate chemical environment. The conclusions are important in the context of designing new switchable molecules and materials.
Flipping the Switch: Fast Photoisomerization in a Confined Environment
作者:Derek E. Williams、Corey R. Martin、Ekaterina A. Dolgopolova、Anton Swifton、Danielle C. Godfrey、Otega A. Ejegbavwo、Perry J. Pellechia、Mark D. Smith、Natalia B. Shustova
DOI:10.1021/jacs.8b02994
日期:2018.6.20
could control photophysics, in particular, cycloreversion kinetics, with a level of control that is not accessible in the solid state or solution. On the series of photoactive materials, we demonstrated for the first time that photoisomerization rates of photochromic compounds could be tuned within almost 2 orders of magnitude. Moreover, cycloreversion rates of photoresponsive derivatives could be modulated