title: New dendritic gelator bearing carbazole in each branching unit: selected response to fluoride ion in gel phase.
abstract: A new dendritic gelator with carbazole as the building block (HBCD) was synthesized. It was found that H-bonding between the amide groups and π-π interaction between the aromatic rings played predominant roles in the gel formation. Meanwhile, significant aggregation-induced emission enhancement was observed in the gel state due to the formation of J-aggregates and the restricted molecular motion. Notably, the gel state of HBCD can be destroyed upon addition of F(-), accompanied by fluorescence enhancement on account of the formation of N-HF(-), which could further lead to the increased coplanarity of HBCD. The sensory capability of HBCD exhibited a high selectivity towards F(-) instead of the Cl(-), Br(-), I(-) and AcO(-) anions, which could be explained by the fact that the steric hindrance of the dendrimer would go against the interactions between the larger anions and HBCD.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China.
authors.forename: Defang
authors.initials: D
authors.lastname: Xu
authors.forename: Xingliang
authors.initials: X
authors.lastname: Liu
authors.forename: Ran
authors.initials: R
authors.lastname: Lu
authors.forename: Pengchong
authors.initials: P
authors.lastname: Xue
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Zhang
authors.forename: Huipeng
authors.initials: H
authors.lastname: Zhou
authors.forename: Junhui
authors.initials: J
authors.lastname: Jia