文献类型：期刊文献

英文题名：Multiple logic fluorescent thermometer system based on N-isopropyl- methacrylamide copolymer bearing dicyanomethylene-4H-pyran moiety

作者：Guo, Zhiqian[1]; Zhu, Weihong[1]; Xiong, Yuyan[1]; Tian, He[1]

机构：[1] Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China

年份：2009

卷号：42

期号：5

起止页码：1448

外文期刊名：Macromolecules

收录：EI(收录号：20092412127365)

语种：英文

外文关键词：Computer circuits - Ions - Logic gates - Fluorescence quenching - Solutions

摘要：The development of polymeric systems that can integrate individual basic logic gates into combinational circuits has been extremely interesting as smart materials. A novel thermometer fluorescent sensor poly(NIPMAM-co-MDCPDP) consisting of N -isopropylmethacrylamide (NIPMAM) as a thermoresponsive unit and dicyanomethylene-4H-pyran derivative as a dipolar-sensitive fluorophore unit was designed. Poly(NIPMAM- co-MDCPDP) performs fluorescence quenching merely by coordination with Cu2+ ions or increasing temperature in neutral or acid aqueous solution. The ON-OFF fluorescence response of poly(NIPMAM-co- MDCPDP) is driven by a temperature-induced phase transition from coil to globule and the capture of Cu2+ ions, resulting in a decrease of the ICT efficiency in neutral solution. The combinational serial NOR logic operation as well as two INHIBIT logic gates was constructed with three inputs: various pH, temperature change, and Cu2+ ions. The proposed combinational logic circuits play a key role in mimicking comprehensive arithmetic operations at the nanoscale level. ? 2009 American Chemical Society.