Ahmed samir mahmoud ahmed
Asst. Professor
Structural-optical spectroscopic investigation of new Ni2+ bearing fluoro aluminoborate glasses
Optical Materials 149 (2024) 115078 • 2024
Publication Information
Authors
Kareem T. Abul-Nasr, A. Samir, Moukhtar A. Hassan, Hesham Y. Amin
Keywords
Ni2+ ions; Aluminum fluoride; Ligand field effects; Glass color; Optics realm
Journal
Optical Materials 149 (2024) 115078
Publisher
Elsever
Volume
Not Available
Issue
Not Available
Pages
Not Available
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Ni2+ bearing fluoro-aluminoborate glass composition [(AlF3)x - (B2O3)0.63-x - (NiO)0.2 - (Na2O)0.35] was prepared
via the melt-quenching method. The structure of glass was confirmed by X-Ray diffraction patterns, density,
molar volume and infrared spectroscopy. The oxygen and fluorine bonds with the other constituent cations are
the backbone of network. Additionally, the ligand field transitions of nickel ions were assigned for octahedral and
tetrahedral forms. Unexpectedly, the addition of fluorine, mixed with oxygen, increased the splitting energy of
3d-orbitals of Ni2+ ions. This unexpected behavior is back to the influence of the high field intensity of aluminum
cations at the expense of boron cations. The splitting energy of 3d-orbitals (10Dq) increased, while interelectronic
repulsion parameters (B and C) decreased. The chemical bonding nature was evaluated. The color
variation of samples from dark brown to light brown was explained. Furthermore, the optical band gap decreased
owing to the high delocalization of electrons.
via the melt-quenching method. The structure of glass was confirmed by X-Ray diffraction patterns, density,
molar volume and infrared spectroscopy. The oxygen and fluorine bonds with the other constituent cations are
the backbone of network. Additionally, the ligand field transitions of nickel ions were assigned for octahedral and
tetrahedral forms. Unexpectedly, the addition of fluorine, mixed with oxygen, increased the splitting energy of
3d-orbitals of Ni2+ ions. This unexpected behavior is back to the influence of the high field intensity of aluminum
cations at the expense of boron cations. The splitting energy of 3d-orbitals (10Dq) increased, while interelectronic
repulsion parameters (B and C) decreased. The chemical bonding nature was evaluated. The color
variation of samples from dark brown to light brown was explained. Furthermore, the optical band gap decreased
owing to the high delocalization of electrons.