An EXAFS study of phenanthroline-holmium complex

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2021, Vol.75 (1), Article 38
• Main Authors: Shahedi, Abdolhamed, Rahighi, Javad, Bolorizadeh, Mohammad Agha
• Format: Article
• Language: English
• Subjects: Absorptivity; Applications of Nonlinear Dynamics and Chaos Theory; Atomic; Coordination numbers; Fine structure; Fourier transforms; Holmium; Infrared spectroscopy; Molecular; Optical and Plasma Physics; Physical Chemistry; Physics; Physics and Astronomy; Quantum Information Technology; Quantum Physics; Regular Article - Molecular Physics and Chemical Physics; Spectra; Spectroscopy/Spectrometry; Spectrum analysis; Spintronics; Structural models; X ray absorption
• ISSN: 1434-6060; 1434-6079
• DOI: 10.1140/epjd/s10053-020-00019-x

A holmium complex, [ Ho ( phen ) 2 ( H 2 O) 2 ( Cl ) 2 ]Cl.H 2 O, as a luminescent/bio probe has been made and characterized using extended X-ray absorption fine structure (EXAFS) as well as IR spectroscopy, UV-Vis spectroscopy, and elemental analysis. Structural data of the formed Ho(III)–phen species are determined from the Ho L III -edge EXAFS spectra as well as its k 2 -weighted and k 3 -weighted spectra. The coordination numbers and distances between the holmium and the first shell atoms, i.e., O, N, and Cl, are measured. The EXAFS spectra are also analyzed by Fourier transform of the normalized absorption coefficient into the molecular distance coordinates to further verify the determined Ho(III) structural model. Graphic abstract