Extended X-ray Absorption Fine Structure of Copper(II) Complexes at the Air-Water Interface by a Polarized Total-Reflection X-ray Absorption Technique

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概要

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• Copper(II) complexes spread on an aqueous solution surface were studied by a polarized total-reflection X-ray absorption fine structure (TR-XAFS) technique. The polarized TR-XAFS spectra at the Cu-K edge for copper(II) porphyrins and copper(II) chlorophyllin in a monolayer were measured in situ at the air-water interface. The polarization dependences of X-ray absorption near-edge structure (XANES) involving a 1s→4pz transition allowed us to estimate the molecular orientation and the local coordination structure around the copper(II) atom in the polarization plane selectively. The extended X-ray absorption fine structure (EXAFS) region of the polarized TR-XAFS spectra for the metal complexes present at the air-water interface was successfully analyzed for the first time. The relative coordination number for the copper center evaluated from the EXAFS analysis indicated larger values in the vertical polarization than in the horizontal one, in agreement with the standing-up molecular orientation at the air-water interface estimated from the XANES region.

• 日本分析化学会の論文
• 2009-04-10

著者

• 谷田 肇

  JASRI SPring-8

• 谷田 肇

  高輝度光科学研究センター

• 谷田 肇

  財団法人高輝度光科学研究センター

• 谷田 肇

  Jasri

• 谷田 肇

  (財)高輝度光科学研究センター 利用促進部門

• TANIDA Hajime

  Japan Synchrotron Radiation Research Institute

• 谷田 肇

  (財)高輝度光科学研究センター

• Tanida Hajime

  Materials Sci. Div. Japan Synchrotron Radiation Res. Inst.

• Tanida Hajime

  Materials Science Division Japan Synchrotron Radiation Research Institute

• Tanida Hajime

  Experimental Facilities Division Japan Synchrotron Radiation Research Institute

• NAGATANI Hirohisa

  Department of Natural Sciences, Hyogo University of Teacher Education

• Tanida H

  Japan Synchrotron Radiation Research Institute

• Tanida Hajime

  Spring-8 Japan Synchrotron Radiation Research Institute (jasri)

• Sagara Takamasa

  Department Of Applied Chemistry Faculty Of Engineering Nagasaki University

• Watanabe Iwao

  Sr Center Ritsumeikan Univ.

• Nagatani Hirohisa

  Department Of Applied Chemistry Faculty Of Engineering Nagasaki University

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