期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 223, 期 -, 页码 59-67出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.09.064
关键词
Recognition of Zn2+; Fluorescence organic nanoparticles; Multivitamin analysis
资金
- Direccion General de Asuntos de Personal Academico (Project PAPIIT) [IN217813]
- Direccion General de Asuntos de Personal Academic (CONACYT-DST) [249516]
- CONACyT
The ligand N,N'-bis(pyridy1-2yl-methyl)ethylenediimine (PMEDI) was synthesized and then transformed into organic nanoparticles (ONPs) which were characterized by analytical methods. The ONPs were employed for the specific recognition of Zn2+ in an aqueous medium by measuring the fluorescence intensity that increased with the concentration of Zn2+ in the PMEDI solution. This proves that PMEDI-ONPs act as a chemo-sensor in detecting Zn2+ at low concentration in aqueous medium. This chemo-sensor (ONPs) is able to determine the concentration of Zn2+ ion in multi-vitamin formulations, and does so selectively for Zn2' in the presence of other nutrient metal ions. Apparently, photo induced electron transfer (PET) works in the PMEDI-ONPs when the fluorophore is excited. For [PMEDI-Zn]Zn2+ system, the PET is inhibited considerably by lowering the receptor HOMO energy due to the formation of a bond between the metal ion and the ligand. Due to inhibition of PET phenomenon the enhancement in the fluorescence emission of PMEDI-ONPs takes place. This is consistent with the theoretical study that the energy of the HOMO of the ligand is lowered when the [PMEDI-Zn]Zn2+ complex is formed. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据