研究了2,6-二氨基吡啶(DAPD)与金属离子作用前后的荧光光谱和吸收光谱.结果表明,在加入过渡金属离子后,其发射光谱和吸收光谱产生红移,且光谱强度随金属离子浓度的加大而增强;但加入K+,Na+,Mg2+,Ca2+,Pd2+等金属离子后,DAPD无响应.根据Irving-Williams顺序,以过渡金属中络合能力较强的Cu2+为代表,考察了其对DAPD吸收光谱及荧光光谱的影响.Cu2+浓度在2.5×10-7～3.5×10-6 mol/L范围内与荧光强度呈线性关系,求算出DAPD与Cu2+的结合比为2:1.比较了不同的过渡金属离子对DAPD荧光强度影响的强弱,即Cu2+＞Zn2+＞Co2+＞Ni2+＞Ag+,并探讨了荧光机理.结合其结构特点,认为DAPD是可逆的、灵敏的过渡金属离子荧光探针.
参考文献
| [1] | 李晶,姜效军,宋文娟,徐红波.示波极谱法测定铜精矿中镉和锌[J].冶金分析,2003(04):43-44. |
| [2] | Maksim Royzen;Zhaohua Dai;James W. Canary .Ratiometric Displacement Approach to Cu(Ⅱ) Sensing by Fluorescence[J].Journal of the American Chemical Society,2005(6):1612-1613. |
| [3] | Gunnlaugsson T;Leonard J P;Murray N S .Highly Selective Colorimetric Naked-Eye Cu(Ⅱ)Detection Using an Azobenzene Chemosensor[J].Organic Letters,2004,6:1557-1560. |
| [4] | Bricks, JL;Kovalchuk, A;Trieflinger, C;Nofz, M;Buschel, M;Tolmachev, AI;Daub, J;Rurack, K .On the development of sensor molecules that display Fe-III-amplified fluorescence[J].Journal of the American Chemical Society,2005(39):13522-13529. |
| [5] | Komatsu, K;Kikuchi, K;Kojima, H;Urano, Y;Nagano, T .Selective zinc sensor molecules with various affinities for Zn2+, revealing dynamics and regional distribution of synaptically released Zn2+ in hippocampal slices[J].Journal of the American Chemical Society,2005(29):10197-10204. |
| [6] | Ayyappanpillai Ajayaghosh;Priya Carol;Sivaramapanicker Sreejith .A Ratiometric Fluorescence Probe for Selective Visual Sensing of Zn~(2+)[J].Journal of the American Chemical Society,2005(43):14962-14963. |
| [7] | Aoki, S;Kagata, D;Shiro, M;Takeda, K;Kimura, E .Metal chelation-controlled twisted intramolecular charge transfer and its application to fluorescent sensing of metal ions and anions[J].Journal of the American Chemical Society,2004(41):13377-13390. |
| [8] | Bernard V;Isabelle L .Design principles of fluorescent molecular sensors for cation recognition[J].Coordination Chemistry Reviews,2000,205:3-40. |
| [9] | Rurack K. .Flipping the light switch 'ON' - the design of sensor molecules that show cation-induced fluorescence enhancement with heavy and transition metal ions [Review][J].Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy,2001(11):2161-2195. |
| [10] | Yu Xiang;Ai-Jun Tong .Simple and Efficient Ratiometric Fluorescent Probes for Near-neutral pH in Aqueous Solutions[J].Chemistry Letters,2005(7):926-927. |
| [11] | 慈云祥;周天泽.分析化学中的配位化合物[M].北京:北京大学出版社,1986 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%