Quenching effect of nickel ions on fluorescent gold nanoparticles.
Herein, we reported the quenching effect of Ni(2+) on bovine serum albumin protected fluorescent gold nanoparticles (BSA-GNPs). The quenching mechanism was discussed and a static quenching mechanism was proposed. The number of binding sites (n), apparent stability constants (K) and corresponding thermodynamic parameters of BSA-GNPs-Ni(2+) complex were measured at different temperatures. Under optimum conditions, the fluorescence intensity of BSA-GNPs is linearly proportional to nickel concentration from 6.0x10(-8)mol/L to 8.0x10(-6)mol/L with a detection limit of 1.0x10(-8)mol/L. The result indicated that BSA-GNP was a potential Ni(2+) probe.
Zheng
Hu-Zhi
HZ
Chongqing Municipal Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, PR China. zhenghz@swu.edu.cn
Liu
Li
L
Zhang
Zhu-Jun
ZJ
Huang
Yu-Ming
YM
Zhou
Dong-Bo
DB
Hao
Jian-Yu
JY
Lu
Yi-Hui
YH
Chen
Su-Ming
SM
D001665:Binding Sites / Q000187:drug effects; D005453:Fluorescence; D006046:Gold / Q000737:chemistry* / Q000378:metabolism; D007477:Ions / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D009532:Nickel / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D012710:Serum Albumin, Bovine / Q000494:pharmacology; D013050:Spectrometry, Fluorescence
D007477:Ions; D012710:Serum Albumin, Bovine; D006046:Gold; D009532:Nickel