Complexation studies of Eu(III) by a novel soft n and hard o donor combined ligand including N, N, N', N'-tetrakis(2-pyridylmethyl)-1, 3-diaminopropane-2-amide structure: UV-vis titration, x-ray crystallography, EXAFS spectroscopy analysis

Hao Wu, Masahiko Nakase, Yusuke Inaba, Miki Harigai, Tohru Kobayashi, Tsuyoshi Yaita, Kenji Takeshita, Seong Yun Kim

Research output: Contribution to journalArticlepeer-review

Abstract

A novel soft N and hard O donor combined ligand including N, N, N', N'-tetrakis(2-pyridylmethyl)-1, 3- diaminopropane-2-amide structure (TPTNA) was successfully synthesized. Its structure and complexation of Eu3+in solid state and methanol solution respectively were investigated by X-ray crystallography, UV-vis titration and EXAFS spectroscopy. As a result, the chemical stoichiometry of Eu3+complex with TPTNA was determined to be 1: 1 by X-ray crystallography. It was found that one amide unit, two pyridine groups from TPTNA coordinated with one Eu3+. However, the Eu-O and Eu-N bond lengths obtained from theoretical fitting of the EXAFS data were consistent with the results from X-ray crystallography studies, reflecting retention of the structure in methanol solution.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalSolvent Extraction Research and Development
Volume28
Issue number1
DOIs
Publication statusPublished - 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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