Synthesis and Characterization of a Phosphorus-containing Tripod Ligand and Its Europium Comphex

doi:10.11944/j.issn.1000-0518.2015.07.140408

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (7): 777-787.DOI: 10.11944/j.issn.1000-0518.2015.07.140408

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Synthesis and Characterization of a Phosphorus-containing Tripod Ligand and Its Europium Comphex

LIU Wei, YANG Shuilan, SONG Pan, YANG Tianlin^*

College of Chemistry and Chemical Engineering,Key Laboratory of Energy Sources and Chemical Engineering,Ningxia University,Yinchuan 750021,China

Received:2014-11-25 Accepted:2015-04-03 Published:2015-06-30 Online:2015-06-30
Contact: Tianlin YANG
Supported by:
Supported by the National Natural Science Foundation of China(No.21261018), the Ministry of Education Science Foundation of Key Projects(No.208195)

Abstract

Abstract:

A novel water-soluble phosphorus-containing tripod ligand [L:N-bis(pyridine-aminoacetyl) methyl phosphate] and its europium complexes was synthesized and characterized by elemental analysis, TG-DSC, IR spectroscopy, UV spectroscopy and molar conductance analysis. In addition, the interaction between bovine serum albumin (BSA) and complexes was investigated with fluorescence spectra at room temperature. The experimental results show that the ligand forms the 1:1 complex Eu(pic)₃L with europium picrate. There exists a strong combination action between complexes and BSA. The acting forces between the complexes and BSA are hydrogen bonding and van der Waals interaction. The quenching of BSA by complexes follows the static quenching mechanism. The influence of Fe³⁺ and Cu²⁺ on the combination process of the complexes with BSA was investigated. It is found that Fe³⁺ and Cu²⁺ can strengthen the interaction of the complex with BSA through the formation a metal bridge bond with the complex. According to Foster type dipole-dipole nonradiative energy transfer mechanism, there is no radiation energy transfer between complexes and BSA by dipole-dipole.

Key words: tripod phosphorus ligands, europium complexes, bovine serum albumin

CLC Number:

LIU Wei, YANG Shuilan, SONG Pan, YANG Tianlin. Synthesis and Characterization of a Phosphorus-containing Tripod Ligand and Its Europium Comphex[J]. Chinese Journal of Applied Chemistry, 2015, 32(7): 777-787.

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Synthesis and Characterization of a Phosphorus-containing Tripod Ligand and Its Europium Comphex

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