Diphenylphosphoryl-Triazole-Tethered, AIEE-Type Conjugated Polymer as Optical Probe for Silver Ion in Relatively High-Water-Fraction Medium

作者：Shi, Wei^*; Sun, Xinhua; Chen, Xin; Zhao, Shiyu; Xie, Zhengfeng

来源：Macromolecular Chemistry and Physics, 2015, 216(23): 2263-2269.

DOI：10.1002/macp.201500207

• Ag+ optical probe
• aggregation-induced emission enhancement
• conjugated polymer
• diphenylphosphoryl-triazole
• fluorescence alteration

A type of conjugated polymer (P3) with the feature of aggregation-induced emission enhancement, and with diphenylphosphoryl-triazole (DPPT) attachment, was successfully synthesized by Cu+-catalyzed click postpolymerization. P3 displayed specific optical response toward Ag+ in organic/aqueous mixtures with relatively high-water-fraction ratio (V-THF/V-water = 2:3). With the addition of Ag+, absorption profile of P3 exhibited obvious redshift (approximate to 30 nm), accompanied by the decrease of absorbance and fluorescence (at approximate to 500 nm). As evaluated from the detailed fluorescence alteration of P3 against incremental Ag+, the detection limit of Ag+ reached approximate to 11 x 10(-9)m (3 sigma, S/N = 3). The presence of other common background metal ions brought insignificant interference for the Ag+ probing by P3. Further investigation revealed that the presence of DPPT segment played a key role for the detection of Ag+ by P3.

• 出版日期2015-12
• 单位西南石油大学; 新疆大学