Premium
Unique Property of Nontraditional Intrinsic Luminescence in the Transforming of Solution‐Hydrogel‐Solid and Its Applications
Author(s) -
Wang Hongyang,
Lan Shuai,
Zhang Yu,
Zhang Lu,
Jia Dandan,
Zhang Weiguo,
Liu Chun,
Cao Lei,
Wang Dongjun
Publication year - 2021
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.202100070
Subject(s) - fluorescence , luminescence , excitation , self healing hydrogels , photochemistry , excitation wavelength , solid state , wavelength , materials science , amine gas treating , phase (matter) , chemistry , nanotechnology , optoelectronics , analytical chemistry (journal) , optics , polymer chemistry , chromatography , organic chemistry , physics , quantum mechanics
For the unusual phenomenon of nontraditional intrinsic luminescence, a systematic fluorescence study is conducted in the phase transformation from solution through hydrogel to solid states. In this process, significant differences are found in fluorescence intensity, peak position, lifetime, and excitation‐dependent emission. In particular, the samples in the hydrogel state show two fluorescent peaks at 480 and 516 nm, respectively, while only one fluorescent peak is detected in the cases of solution (at 516 nm) or solid (at around 450 nm). More interestingly, the longer wavelength peak presents excitation‐dependent fluorescence, and the shorter one is excitation‐independent. These unique fluorescent observations can be ascribed to the fact that the aggregates of amine groups act as the actual fluorescent centers, which are quite sensitive to their surrounding microenvironments. Based on these results, some simulation tests of sensors and intelligent hydrogels in response to water are also studied.