title: Coupled molecular motions driven by light or chemical inputs: spiropyran to merocyanine isomerisation followed by pseudorotaxane formation.
abstract: We have designed and prepared a new dual stimuli-responsive guest molecule containing a spiropyran fragment and a pyridinium moiety. Acid addition or UV-light irradiation induces guest transformation to a merocyanine isomer, promoting the threading motion through a 24-crown-8 macrocycle and the formation of a [2]pseudorotaxane complex.
authors.affiliation: Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), México D.F., Mexico. jtiburcio@cinvestav.mx.
authors.forename: Denhy
authors.initials: D
authors.lastname: Hernández-Melo
authors.affiliation: Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), México D.F., Mexico. jtiburcio@cinvestav.mx.
authors.forename: Jorge
authors.initials: J
authors.lastname: Tiburcio
mesh_terms: D000143:Acids / Q000737:chemistry; D001578:Benzopyrans / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D007536:Isomerism; D009574:Nitro Compounds / Q000737:chemistry*; D066244:Proton Magnetic Resonance Spectroscopy; D043862:Rotaxanes / Q000138:chemical synthesis*; D014466:Ultraviolet Rays
chemical_list: D000143:Acids; D001578:Benzopyrans; D007211:Indoles; D009574:Nitro Compounds; D043862:Rotaxanes; C548873:merocyanine; C088184:spiropyran