title: Reversible Disassembly-Assembly of Octa Acid-Guest Capsule in Water Triggered by a Photochromic Process.
abstract: Octa acid (OA), a calixarene-based cavitand, forms a 1:2 capsular assembly with neutral 1,3,3-trimethyl-6'-nitrospiro[2H-1]benzopyran-2,2'-indoline and 1:1 cavitandplex with its open zwitterionic merocyanine form. Photochromic interconversion between the spiropyran and merocyanine leads to unprecedented reversible capsular disassembly and assembly. OA provides stability to the merocyanine in both the ground and excited states. The photochemically controlled disassembly and assembly process established here points toward the opportunity of using the OA capsule in delivering small molecules at the desired locations.
authors.affiliation: Department of Chemistry, University of Miami , Coral Cables 33124, United States.
authors.forename: A
authors.initials: A
authors.lastname: Mohan Raj
authors.affiliation: Department of Chemistry, University of Miami , Coral Cables 33124, United States.
authors.forename: Françisco M
authors.initials: FM
authors.lastname: Raymo
authors.affiliation: Department of Chemistry, University of Miami , Coral Cables 33124, United States.
authors.forename: V
authors.initials: V
authors.lastname: Ramamurthy