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论文类型：期刊论文

发表时间：2010-06-23

发表刊物：ADVANCED FUNCTIONAL MATERIALS

收录刊物：SCIE、EI

卷号：20

期号：12

页面范围：1903-1909

ISSN号：1616-301X

摘要：An inorganic-organic silica material (SBA-P2), prepared by immobilization of the 1,8-naphthalimide-based receptor P2 within the channels of the mesoporous silica material SBA-15, is characterized by transmission electron microscopy and several spectroscopic methods. SBA-P2 features a high affinity Cu2+-specific fluorescence response in aqueous solution with a detection limit for Cu2+ of ca. 0.65 ppb (10 x 10(M)(-9)) under optimized conditions. It can extract Cu2+ from the solution with only trace amounts remaining. Through isolating of the toxic ions within the mesopores of the silica, SBA-P2 has the potential to work as a toxicide for Cu2+ in living systems. The fluorogenical responses are reversible and do not vary over a broad (4.0 to 9.0) pH range suitable for application under physiological conditions. The fluorescence responses of Cu2+ in vitro (human breast cancer cells) and in vivo (five-day-old zebrafish) demonstrate the possibility of further application in biology.