Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III)
Transition metal hexacyanocobaltates(III) correspond to coordination polymers that present physical properties that can be used for technological applications. In this sense, properties like spin-crossover under different physical stimuli (light, temperature, pression, etc) or the colossal mechanica...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Chemistry of Inorganic Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949746923000216 |
| _version_ | 1797237882564378624 |
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| author | R. Mojica A.E. Torres Y. Avila E. Reguera |
| author_facet | R. Mojica A.E. Torres Y. Avila E. Reguera |
| author_sort | R. Mojica |
| collection | DOAJ |
| description | Transition metal hexacyanocobaltates(III) correspond to coordination polymers that present physical properties that can be used for technological applications. In this sense, properties like spin-crossover under different physical stimuli (light, temperature, pression, etc) or the colossal mechanical negative thermal expansion has been reported as astonishing properties of these materials (Goodwin et al., 2008; Goodwin et al., 2008; Avila et al., 2022) [1–3]. In this contribution, the electronic properties of hexacyanocobaltates(III) that contain Zn2+, Cd2+ and Ag1+ as metal ions, with a closed d-shell electronic configuration, are studied by means of combined UV–Vis spectroscopy and ab-initio calculations. The influence of the outer metals (Zn, Cd, Ag) when forming the coordination polymers as well as the effect of the inner octahedral moiety [Co(CN)6]3- have on the macroscopic electronic properties is discussed. Metal to ligand charge transfer transitions that produce the optical behavior are also clarified. Furthermore, the origin of the band gap transitions for Zn and Cd hexacyanocobaltates(III) is reported for the first time and supported by ab-initio calculations. New optical band gap energy values are proposed from a combined Urbach and Tauc analysis. Finally, the effects of metal substitution in Prussian blue analogues and the structural phase shift towards a zeolite-like phase on the band gap are analyzed. |
| first_indexed | 2024-04-24T17:26:49Z |
| format | Article |
| id | doaj.art-43e9db912a894e83a0edd3e3ca1f17e1 |
| institution | Directory Open Access Journal |
| issn | 2949-7469 |
| language | English |
| last_indexed | 2024-04-24T17:26:49Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemistry of Inorganic Materials |
| spelling | doaj.art-43e9db912a894e83a0edd3e3ca1f17e12024-03-28T06:40:08ZengElsevierChemistry of Inorganic Materials2949-74692023-12-011100021Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III)R. Mojica0A.E. Torres1Y. Avila2E. Reguera3Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada - Unidad Legaria, Instituto Politécnico Nacional, Legaria 694, M. Hidalgo, 11500, México City, MexicoInstituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, CU, Coyoacán, 04510, México City, Mexico; Corresponding author.Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada - Unidad Legaria, Instituto Politécnico Nacional, Legaria 694, M. Hidalgo, 11500, México City, MexicoCentro de Investigación en Ciencia Aplicada y Tecnología Avanzada - Unidad Legaria, Instituto Politécnico Nacional, Legaria 694, M. Hidalgo, 11500, México City, Mexico; Corresponding author.Transition metal hexacyanocobaltates(III) correspond to coordination polymers that present physical properties that can be used for technological applications. In this sense, properties like spin-crossover under different physical stimuli (light, temperature, pression, etc) or the colossal mechanical negative thermal expansion has been reported as astonishing properties of these materials (Goodwin et al., 2008; Goodwin et al., 2008; Avila et al., 2022) [1–3]. In this contribution, the electronic properties of hexacyanocobaltates(III) that contain Zn2+, Cd2+ and Ag1+ as metal ions, with a closed d-shell electronic configuration, are studied by means of combined UV–Vis spectroscopy and ab-initio calculations. The influence of the outer metals (Zn, Cd, Ag) when forming the coordination polymers as well as the effect of the inner octahedral moiety [Co(CN)6]3- have on the macroscopic electronic properties is discussed. Metal to ligand charge transfer transitions that produce the optical behavior are also clarified. Furthermore, the origin of the band gap transitions for Zn and Cd hexacyanocobaltates(III) is reported for the first time and supported by ab-initio calculations. New optical band gap energy values are proposed from a combined Urbach and Tauc analysis. Finally, the effects of metal substitution in Prussian blue analogues and the structural phase shift towards a zeolite-like phase on the band gap are analyzed.http://www.sciencedirect.com/science/article/pii/S2949746923000216Metal hexacyanocobaltate(III)Prussian blue analoguesMetal to ligand charge transferDensity functional theoryElectronic structureOptical response |
| spellingShingle | R. Mojica A.E. Torres Y. Avila E. Reguera Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III) Chemistry of Inorganic Materials Metal hexacyanocobaltate(III) Prussian blue analogues Metal to ligand charge transfer Density functional theory Electronic structure Optical response |
| title | Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III) |
| title_full | Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III) |
| title_fullStr | Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III) |
| title_full_unstemmed | Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III) |
| title_short | Electronic structure that gives rise to the optical properties of zinc, cadmium and silver hexacyanocobaltates(III) |
| title_sort | electronic structure that gives rise to the optical properties of zinc cadmium and silver hexacyanocobaltates iii |
| topic | Metal hexacyanocobaltate(III) Prussian blue analogues Metal to ligand charge transfer Density functional theory Electronic structure Optical response |
| url | http://www.sciencedirect.com/science/article/pii/S2949746923000216 |
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