吲哚衍生物改性的碳纳米管铜离子荧光传感器
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摘要
用吲哚衍生物(INDOLE)共价修饰在碳纳米管的表面获得了一种高效的荧光检测器,并通过红外光谱和热重分析对其表征。研究了常见金属离子Zn~(2+),Cd~(2+),Mg~(2+),Ca~(2+),Ni~(2+)和Cu~(2+)对吲哚衍生物共价修饰的碳纳米管(MWNTs-INDOLE)荧光光谱的影响,通过荧光测试表明MWNTs-INDOLE对铜离子具有荧光选择性,并且随着铜离子浓度的增加荧光强度逐渐减弱,加入1×10~(-5)mol/L的Cu~(2+),MWNTs-INDOLE的荧光被淬灭50%。
A highly fluorescent material( MWNTs-INDOLE) was synthesized by carbon nanotube-based indole derivative,and characterized by FTIR and TGA. The characterization data indicated that the organic ligand was successfully grafted on the surface of the carbon nanotube. This material showed excellent selective for the Cu~(2+) ion over other cations,such as Zn~(2+),Cd~(2+),Mg~(2+),Ca~(2+) and Ni~(2+). The fluorescence intensity decreased with the increase of the concentration of Cu~(2+) ion. Moreover,the fluorescence intensity quenched to 50% when 1×10~(-5)mol/L of Cu~(2+) was added.
A highly fluorescent material( MWNTs-INDOLE) was synthesized by carbon nanotube-based indole derivative,and characterized by FTIR and TGA. The characterization data indicated that the organic ligand was successfully grafted on the surface of the carbon nanotube. This material showed excellent selective for the Cu~(2+) ion over other cations,such as Zn~(2+),Cd~(2+),Mg~(2+),Ca~(2+) and Ni~(2+). The fluorescence intensity decreased with the increase of the concentration of Cu~(2+) ion. Moreover,the fluorescence intensity quenched to 50% when 1×10~(-5)mol/L of Cu~(2+) was added.
引文
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[3] K M Gattas-Asfura,R M Leblanc. Peptide-coated CdS quantum dots for the optical detection of copper(ii)and silver(i)[J]. Chemical Communications,2003,21(21):2684-2685.
[4] S Kolusheva, O Molt, M Herm, et al. Selective Detection of Catecholamines by Synthetic Receptors Embedded in Chromatic Polydiacetylene Vesicles[J]. Journal of the American Chemical Society,2005,127(28):10000-10001.
[5] K P Mc Namara,N Rosenzweig,Z Rosenzweig. Liposome-Based Optochemical Nanosensors[J]. Microchimica Acta,1999,131:57-64.
[6]曲松.纳米管复合材料的制备及在生物传感器中的应用[D].上海:复旦大学,2007.
[7] S Iijima. Helieal mierotubules of graphitic carbon[J]. Nature,1991,354:56-58.
[8] V A Karachevtsev,A Y Glamazda,V S Leontiev,et al. Glucose sensing based on NIR fluorescence of DNA-wrapped single-walled carbon nanotubes[J]. Chemical Physics Letters,2007,435:104-108.
[9] R Yang, J Jin, Y Chen, et al. Carbon Nanotube-Quenched Fluorescent Oligonucleotides:Probesthat Fluoresce upon Hybridization[J]. Journal of the American Chemical Society,2008,130:8351-8358.
[10] S H Lee,J S Im,S C Kang,et al. An increase in gas sensitivity and recovery of an MWCNT-based gas sensor system in response to an electric field,Chemical Physics Letters,2010,497(4):191-195.
[11] Z Dong,B Yang,J Jin,et al. Quinoline Group Modified Carbon Nanotubes for the Detection of Zinc Ions[J]. Nanoscale Research Letters,2009,4(4):335-340.
[12] Z Dong,J Jin,W Zhao,et al. Quinoline group grafted carbon nanotube fluorescent sensor for detection of Cu2+ion[J]. Applied Surface Science,2009,255(23):9526-9530.
[13] R Aucejo,J Alarcon,C Soriano,et al. New sensing devices part 1:indole-containing polyamines supported in nanosized boehmite particles[J]. Journal of Materials Chemistry,2005,15(27-28):2920-2927.