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Self-healing gels triggered by ultrasound with color-tunable emission based on ion recognition

Author:
Guo, Jiangbo, Yu, Xudong, Zhang, Zheng, Li, Yajuan
Source:
Journal of colloid and interface science 2019 v.540 pp. 134-141
ISSN:
0021-9797
Subject:
binding sites, cholesterol, color, fluorescence, gelation, gels, hydrogen bonding, inorganic ions, sonication
Abstract:
Herein, O-substituted terpyridine motif was used as both rigid fluorescent π core and ion binding site, in order to construct an novel amphiphilic organogelator TEC containing cholesterol unit. We demonstrated a ultrasound induced reversible sol-gel transition approach driven by adjusted non covalent interactions and the resulted gels showed self-healing properties and tunable emission color when incorporating inorganic ions into the gel matrices. By heating-cooling process, the gel transformed to sol again. Simultaneously, the vesicle-tube morphology transition controlled by sonication and heating-cooling was also observed, together with aggregation induced emission enhancement (AIE) property of the gel. The results suggested that ultrasound promoted the J aggregations of terpyridine motifs and enhanced the hydrogen bonding interactions of TEC molecules, leading to the gelation process.
Agid:
6289016