摘要
设计合成了识别Zn2+的荧光传感分子——2-羟基-1-萘甲醛缩-2-萘甲酰腙(3)。通过红外光谱、核磁共振谱和质谱测试技术表征了其结构。利用其光谱性质研究了该物质对几种过渡金属离子的识别性质,初步探讨了其结合模式。结果表明,在乙腈介质中,受体分子3表现出对Zn2+良好的选择性,Zn2+的加入导致受体分子3的吸收光谱在435nm处出现1新峰,其吸光度逐渐增强,同时于239、302、330、342和387nm处观察到5个清晰的等吸收点;在516nm处荧光增强101倍,而其它过渡金属只引起受体分子3的荧光略微增强。Job法实验揭示受体分子3与Zn2+的结合比为1:1。
A fluorescent chemosensor,N＇-（（2-hydroxynaphthalen-1-yl）methylene）-2-naphthohydrazone（3）,was designed and synthesized.Compound 3 was confirmed by IR,1H NMR and ESI-MS.Compound 3 was investigated to recognize transition metal ions such as Zn^2＋,Cd^2＋,Cu^2＋,Hg^2＋,Pb^2＋ and Ni^2＋ via the fluorescence spectroscopic method.Mechanism of enhancement of the fluorescence of compound 3 by Zn^2＋ was briefly discussed.The experiments show that acceptor 3 has a good selectivity of Zn^2＋ in acetonitrile.A new peak in the absorption spectrum of acceptor 3 at 435 nm appears for the addition of Zn^2＋ with the gradually increasing absorbancy,while five clear absorption points can be observed at 239,302,330,342 and 387 nm,respectively.The fluorescence of acceptor 3 shows a highly selective response to Zn^2＋ only.In acetonitrile Zn^2＋ induced a dramatic enhancement in the fluorescence of acceptor 3 by 101 folds at 516 nm,whereas the other transition metal ions had little influence on the fluorescence of acceptor 3.Job＇s test showed acceptor 3 coordinated to Zn^2＋ to form a 1∶1 model complex.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第6期632-636,共5页
Chinese Journal of Applied Chemistry
关键词
羟基萘甲醛缩萘甲酰腙
Zn2+
荧光传感
分子识别
N＇-（（hydroxynaphthalenyl）methylene）naphthohydrazone
Zn^2＋
fluorescence enhancement
molecular recognition
