一种新合成的荧光氨基脲衍生物的光谱表征及其作为铜（II）选择性光纤传感器的应用。
Spectral characterization of a newly synthesized fluorescent semicarbazone derivative and its usage as a selective fiber optic sensor for copper(II).
作者信息
Oter Ozlem, Ertekin Kadriye, Kirilmis Cumhur, Koca Murat
机构信息
University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Tinaztepe, Izmir, Turkey.
出版信息
Anal Chim Acta. 2007 Feb 19;584(2):308-14. doi: 10.1016/j.aca.2006.11.052. Epub 2006 Nov 25.
In this work photoluminescent properties of highly Cu(2+) selective organic fluoroionophore, semicarbazone derivative; bis(naphtho[2,1-b]furan-2-yl)methanone semicarbazone (BNF) was investigated in different solvents (dichloromethane, tetrahydrofuran, toluene and ethanol) and in polymer matrices of polyvinylchloride (PVC) and ethyl cellulose (EC) by absorption and emission spectrometry. The BNF derivative displayed enhanced fluorescence emission quantum yield, Q(f)=6.1 x 10(-2) and molar extinction coefficient, epsilon=29,000+/-65 cm(-1)M(-1) in immobilized PVC matrix, compared to 2.6 x 10(-3) and 24,573+/-115 in ethanol solution. The offered sensor exhibited remarkable fluorescence intensity quenching upon exposure to Cu(2+) ions at pH 4.0 in the concentration range of 1.0 x 10(-9) to 3.0 x 10(-4)M [Cu(2+)] while the effects of the responding ions (Ca(2+), Hg(+), Pb(2+), Al(3+), Cr(3+), Mn(2+), Mg(2+), Sn(2+), Cd(2+), Co(2+) and Ni(2+)) were less pronounced.
在本研究中，通过吸收光谱和发射光谱，研究了高选择性铜（II）有机氟离子载体——氨基脲衍生物双（萘并[2,1 - b]呋喃 - 2 - 基）甲酮氨基脲（BNF）在不同溶剂（二氯甲烷、四氢呋喃、甲苯和乙醇）以及聚氯乙烯（PVC）和乙基纤维素（EC）聚合物基质中的光致发光特性。与乙醇溶液中的2.6×10⁻³和24,573±115相比，BNF衍生物在固定化PVC基质中显示出增强的荧光发射量子产率，Q(f)=6.1×10⁻²，以及摩尔消光系数，ε=29,000±65 cm⁻¹M⁻¹。所提供的传感器在pH 4.0、铜（II）离子浓度范围为1.0×10⁻⁹至3.0×10⁻⁴M [Cu(2+)]时，对铜（II）离子表现出显著的荧光强度猝灭，而响应离子（Ca(2+)、Hg(+)、Pb(2+)、Al(3+)、Cr(3+)、Mn(2+)、Mg(2+)、Sn(2+)、Cd(2+)、Co(2+)和Ni(2+)）的影响则不太明显。
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