Affiliation:
1. School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China
Abstract
A multi-stimuli responsive fluorophore, named NBDNI, was developed by constructing a 1,8-naphthalimide derivative in which a rotatable electron-donating N,N-dimethylaniline group attached to its 4-position. This molecular structure endowed NBDNI with aggregate-induced emission (AIE) and twisted intramolecular charge transfer (TICT) properties, enabling remarkable fluorescence changes in response to multiple external stimuli: (i) sensitivity to polarity in various solvent systems and polymer matrix; (ii) significant fluorescence response and excellent linearity towards temperature changes in solution; (iii) distinct switch of fluorescence color upon acid and base treatments; (iv) reversible mechanochromism behavior in the solid state. Moreover, the mechanisms underlying the aforementioned stimuli-responsive phenomena have been proposed based on comprehensive systematic measurements. Furthermore, preliminary applications such as fluorescence thermometry and acid/base test paper have been demonstrated. This research will bring about new opportunities for the development of novel stimuli-responsive luminescent materials.
Funder
GuangDong Basic and Applied Basic Research Foundation
Professorial and Doctoral Scientific Research Foundation of Huizhou University
Key Projects of Guangdong Education Department
Guangdong Province key construction discipline research ability enhancement project
Key Research Projects in Colleges and Universities in Guangdong Province