科研之友
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摘要
A type of N-unsubstituted-1,2,3-triazole-decorated conjugated polymer (P3), with the feature of aggregation-induced emission enhancement (AIEE), was successfully synthesized via a Cu+-catalyzed click reaction between an acetylene-substituted precursor polymer (P2) and azidotrimethylsilane. Except for Ag+, the introduction of other metal ions had only a slight influence on the optical properties of P3. With the introduction of aqueous Ag+, the fluorescence of P3 in a THF-water mixture (v(THF)/v(water) = 4/1) (buffered with Tris-CA, 1 mM, pH = 7.4) displayed a ratiometric alteration at the blue (B420 nm) and green (similar to 495 nm) bands. The corresponding I-495/I-420 ratio values maintained an upward trend throughout the titration process of Ag+. The detection limit of Ag+ reaches similar to 1.4 mM (3 sigma/k), as evaluated from the corresponding relationship between I-495/I-420 and [Ag+]. The aggregation between the polymer chains induced by a Ag+-triazole interrelation is the plausible reason for the alteration of P3's optical properties.
