Polymers with aggregation-induced emission (AIE) characteristics have aroused tremendous interest because of their potential applications in large-area flexible display and luminescent self-assembling, and as stimuli-responsive and porous materials. However, the design of AIE-active polymers is always not as easy as that of small molecules because their properties are hard to predict. In some cases, the polymers prepared from the AIE-active monomers show the aggregation-caused quenching (ACQ) instead of AIE effect. To understand the structure-property relationship of the polymers constructed from the AIE monomers, in this paper, two pyrazine-containing AIE monomers were utilized to construct luminescent polymers by click polymerization. The photophysical property investigation indicates that the polytriazole containing tetraphenylpyrazine units is AIE-active, whereas that bearing 2,3-dicyano-5,6-diphenylpyrazine units suffers from the ACQ effect. Through systematical investigation, the cause for such difference was unveiled. Thus, this work provides a useful guidance for further design of AIE-active polymers.
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Article Synopsis
- The study focuses on improving the solubility of cellulose to expand its applications, particularly in detecting mercury ions.
- The researchers synthesized cellulose probes that exhibit aggregation-induced emission (AIE) properties, enhancing sensitivity and efficiency in detecting Hg ions.
- By modifying cellulose through esterification, they created oil-soluble fluorescent polymers that connect to cellulose, allowing these new probes to dissolve in various organic solvents and be fabricated into films and gels for detection purposes.
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