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金虫 (初入文坛)

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Abstract  In this study a new fluorescent Schiff base; 1,1′-
(4,4′-oxybis(4,1-phenylene)bis(azan-1-yl-1-ylidene))bis
(methan-1-yl-1-ylidene)dinaphthalen-2-ol (2-HNA) was
synthesized and characterized by FT-IR, UV-vis, and 1H
and 13C-NMR techniques. Photoluminescent properties of
2-HNA were investigated in different solvents including
methanol, THF, DMF, DMSO, acetone, acetonitrile, and
dichloromethane. 2-HNA was found to have higher emission
intensity and Stoke’s shift value (ΔλST) in methanol
solution. Relative emission intensity changes (I0−I/I0) of 2-
HNA in methanol/water mixtures depending on different
Cu+2 ion concentrations were determined and a linearized
plot was obtained. Possible interference of some other
transition metal ions was also determined. Sensitivity limit
of the new sensor was found to be higher than 5×10−7 mol/L.
2-HNA has quite high selectivity against Cu+2 ion and, thus,
can be used as a new fluorescence Cu+2 ion sensor in
practice.
Keywords Fluorescence sensor . Cu(II) sensor . Schiff base .
Chemosensor
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至尊木虫 (职业作家)

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转弯为你相遇: 金币+25, 翻译EPI+1, ★★★★★最佳答案 2012-04-27 07:23:50
摘要:本文研究了一种新型荧光西弗碱2-HNA,研究了这种西弗碱的合成并通过红外,紫外-可见光谱,H谱C谱技术检测了其结构。我们研究了2-HNA在不同溶剂中的荧光性能,溶剂包括甲醇,四氢呋喃,N,N-二甲基甲酰胺,二甲亚砜,丙酮 ,乙腈,和二氯甲烷。我们发现2-HNA具有更强的发射光 而且 在甲醇中的Stoke’s 位移值(ΔλST) 更大。2-HNA化合物相应的发射强度变化值在甲醇与水的混和液中为 I0−I/I0,这主要取决于二价铜离子的浓度
以及获得的线性关系。我们也检测了其它过渡金属离子的可能界面。 新检测器的灵敏度要求浓度高于  5×10−7 mol/L.2-HNA对二价铜离子有高度的选择性,能用于新荧光检测器的制备。
关键词:荧光探测器,二价铜探测器,西弗碱,化学检测器
相逢,相识,相知
2楼2012-04-27 00:16:28
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