A novel reversible colorimetric chemosensor for the detection of Cu2+ based on a water-soluble polymer containing rhodamine receptor pendants

摘要

A novel reversible colorimetric chemosensor based on a water-soluble polymer containing rhodamine receptor pendants has been developed. The chemosensor exhibited high sensitivity and selectivity to Cu2+ ions with a short response time in pure aqueous solution, and the results could be monitored directly by the naked eye. The detection limit was 3.6 x 10(-7) M with UV-vis absorbance experiment. The absorption intensity of P(HEA-co-RhBBA) for Cu2+ remained unaffected over a wide pH range of 4-10. In addition, low-cost test strips were fabricated using P(HEA-co-RhBBA) for convenient and efficient detection of Cu2+ ions.