title: Driving Helical Packing of a Cyanine Dye on Dendron Nanofiber: Gel-Shrinkage-Triggered Chiral H-Aggregation and Enhanced Enantiodiscrimination.
abstract: An intelligent molecular hydrogel with a volume phase transition was constructed to regulate the chiral packing of a well-known cyanine dye on a dynamically self-assembled chiral nanofiber by using a pH trigger. During the shrinkage of the gel, the chiral nanofiber hierarchically assembled into a superhelix and simultaneously drove the dye molecules to stack, from a predominantly monomer form, in an unexpected helical H-aggregation manner. Through such a transformation, the supramolecular chirality of the system was significantly enhanced and a new property of visual discrimination for chiral amines emerged.
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing (P. R. China).
authors.forename: Long
authors.initials: L
authors.lastname: Qin
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing (P. R. China).
authors.forename: Fan
authors.initials: F
authors.lastname: Xie
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing (P. R. China).
authors.forename: Xue
authors.initials: X
authors.lastname: Jin
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing (P. R. China). liumh@iccas.ac.cn.|Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072 (P. R. China). liumh@iccas.ac.cn.
authors.forename: Minghua
authors.initials: M
authors.lastname: Liu
keywords: chiral recognition; dendrons; hydrogel shrinkage; supramolecular chirality; π-π stacking