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Citation: LIU Wei, YANG Shuilan, SONG Pan, YANG Tianlin. Synthesis and Characterization of a Phosphoruscontaining Tripod Ligand and Its Europium Comphex[J]. Chinese Journal of Applied Chemistry, ;2015, 32(7): 777-787. doi: 10.11944/j.issn.1000-0518.2015.07.140408 shu

Synthesis and Characterization of a Phosphoruscontaining Tripod Ligand and Its Europium Comphex

1.
College of Chemistry and Chemical Engineering, Key Laboratory of Energy Sources and Chemical Engineering, Ningxia University, Yinchuan 750021, China

Corresponding author: YANG Tianlin,
Received Date: 25 November 2014
Available Online: 12 December 2014
Fund Project: 国家自然科学基金资助项目(21261018) (21261018)教育部科学基金重点资助项目(208195) (208195)

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.
- tripod phosphorus ligands,
- europium complexes,
- bovine serum albumin
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