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Related Concept Videos

Properties of Transition Metals02:58

Properties of Transition Metals

29.5K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
13.9K
Valence Bond Theory02:42

Valence Bond Theory

11.2K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.2K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
23.9K
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

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Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.6K

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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Electronic and Optical Properties of Transition-Metal-Modified BiFeO3: A First Principles Study.

A P Aslla Quispe1, L C Huamani Aslla2, B Barzola Moscoso1

  • 1Grupo de Investigación en Ciencias e Ingeniería GICI-UNIQ, Universidad Nacional Intercultural de Quillabamba, Cusco 08741, Peru.

Materials (Basel, Switzerland)
|January 10, 2026
PubMed
Summary
This summary is machine-generated.

Substituting iron with transition metals in bismuth ferrite (BiFeO3) creates new materials with tunable electronic, magnetic, and optical properties. This research explores these changes for potential electronic device applications.

Keywords:
BiFeO3electronic propertiesfirst-principles calculationsoptical properties

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Computational Chemistry

Background:

  • Bismuth ferrite (BiFeO3) is a multiferroic material with G-type antiferromagnetic ordering.
  • Its structural, electronic, magnetic, and optical properties are of interest for various applications.

Purpose of the Study:

  • To investigate the effects of substituting Fe with transition metals (Mn, Co, Ni) in BiFeO3.
  • To explore the resulting changes in structural, electronic, magnetic, and optical properties.

Main Methods:

  • First-principles DFT+U and TDDFT calculations were employed.
  • Structural optimization and property calculations were performed for BiFe0.834X0.166O3 (X = Mn, Co, Ni).

Main Results:

  • Substitutions maintained the rhombohedral structure but altered octahedral distortions and bond angles.
  • Antiferromagnetic BiFeO3 transitioned to metallic behavior with Ni, Co, or Mn inclusion.
  • Antiferromagnetic ordering shifted to ferrimagnetic behavior upon substitution.
  • Co and Ni enhanced optical absorption and extinction coefficients, while Mn had a lesser effect.

Conclusions:

  • Controlled transition metal substitution in BiFeO3 significantly modifies its properties.
  • These modified materials show potential for multifunctional electronic devices.