A Novel Polymeric Chemosensor: Dual Colorimetric Detection of Metal Ions Through Click Synthesis

作者：Li Yongrong; Ashizawa Minoru; Uchida Satoshi; Michinobu Tsuyoshi^*

来源：Macromolecular Rapid Communications, 2011, 32(22): 1804-1808.

DOI：10.1002/marc.201100397

• charge transfer
• cooperative effects
• functionalization of polymers
• sensors

A highly colored polystyrene derivative bearing side chain chromophores composed of dialkylanilino donor and cyano-based acceptor groups, prepared by atom-economic click postfunctionalization, displays the dual colorimetric detection behavior of several metal ions based on the specific interactions with different nitrogen atoms. Hard to borderline metal ions, such as Fe3+, Fe2+, and Sn2+, are always recognized by the dialkylanilino nitrogen atom, resulting in a decrease in the charge-transfer (CT) band intensity of the donoracceptor chromophores. On the other hand, the recognition site of a soft metal ion of Ag+ is the cyano nitrogen atom due to the readily formed multivalent coordination, which produces a bathochromic shift of the CT band.

• 出版日期2011-11-15