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Broadband infrared-transparent crystals enabled by heterologous isomorphic substitution.

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Title: Broadband infrared-transparent crystals enabled by heterologous isomorphic substitution.
Authors: Yang, Bo1,2 (AUTHOR), Chen, Ziqi2,3 (AUTHOR), Lu, Zhenjiang1 (AUTHOR) luzj@xju.edu.cn, Lu, Juanjuan2 (AUTHOR) lujuan@ms.xjb.ac.cn
Source: Dalton Transactions: An International Journal of Inorganic Chemistry. 5/12/2026, Vol. 55 Issue 18, p7056-7061. 6p.
Subjects: Optical materials, Zinc halides, Infrared technology, Optical properties, Electronic band structure
Abstract: Broadband infrared-transparent crystals that simultaneously possess a short ultraviolet cut-off edge and extended infrared transmission are highly desirable for optical applications but remain challenging due to the inverse relationship between bandgap and infrared transparency. Here, we report a simple but effective heterologous isomorphic substitution strategy to address these issues. Using chalcogenide Ba3GaS4I as a structural template, we synthesized a series of inorganic halides A3ZnCl4I (A = K, Rb, NH4) via room-temperature aqueous methods. Remarkably, these compounds are isostructural to the Ba3GaS4I parent compound, where [ZnCl4] tetrahedra isomorphically replace [GaS4] units, K ions substitute Ba ions, and I ions remain in their identical crystallographic position. This functional unit substitution significantly expands the transmission range: the ultraviolet cut-off edge blue-shifts from 322 nm in Ba3GaS4I to 236–247 nm in A3ZnCl4I (A = K, Rb, NH4), while the infrared absorption edge extends from 13.2 μm to 17.5–17.7 μm. This work demonstrates that heterologous isomorphic substitution is an effective approach for modulating electronic structures and designing broadband infrared-transparent optical materials. [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 193654671
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PubTypeId: academicJournal
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  Data: Broadband infrared-transparent crystals enabled by heterologous isomorphic substitution.
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  Data: <searchLink fieldCode="AR" term="%22Yang%2C+Bo%22">Yang, Bo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Ziqi%22">Chen, Ziqi</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Zhenjiang%22">Lu, Zhenjiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> luzj@xju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Juanjuan%22">Lu, Juanjuan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> lujuan@ms.xjb.ac.cn</i>
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  Data: <searchLink fieldCode="DE" term="%22Optical+materials%22">Optical materials</searchLink><br /><searchLink fieldCode="DE" term="%22Zinc+halides%22">Zinc halides</searchLink><br /><searchLink fieldCode="DE" term="%22Infrared+technology%22">Infrared technology</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+properties%22">Optical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+band+structure%22">Electronic band structure</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Broadband infrared-transparent crystals that simultaneously possess a short ultraviolet cut-off edge and extended infrared transmission are highly desirable for optical applications but remain challenging due to the inverse relationship between bandgap and infrared transparency. Here, we report a simple but effective heterologous isomorphic substitution strategy to address these issues. Using chalcogenide Ba3GaS4I as a structural template, we synthesized a series of inorganic halides A3ZnCl4I (A = K, Rb, NH4) via room-temperature aqueous methods. Remarkably, these compounds are isostructural to the Ba3GaS4I parent compound, where [ZnCl4] tetrahedra isomorphically replace [GaS4] units, K ions substitute Ba ions, and I ions remain in their identical crystallographic position. This functional unit substitution significantly expands the transmission range: the ultraviolet cut-off edge blue-shifts from 322 nm in Ba3GaS4I to 236–247 nm in A3ZnCl4I (A = K, Rb, NH4), while the infrared absorption edge extends from 13.2 μm to 17.5–17.7 μm. This work demonstrates that heterologous isomorphic substitution is an effective approach for modulating electronic structures and designing broadband infrared-transparent optical materials. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1039/d6dt00568c
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        Text: English
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      – SubjectFull: Optical materials
        Type: general
      – SubjectFull: Zinc halides
        Type: general
      – SubjectFull: Infrared technology
        Type: general
      – SubjectFull: Optical properties
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      – SubjectFull: Electronic band structure
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      – TitleFull: Broadband infrared-transparent crystals enabled by heterologous isomorphic substitution.
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            NameFull: Chen, Ziqi
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            NameFull: Lu, Zhenjiang
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            – D: 12
              M: 05
              Text: 5/12/2026
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              Y: 2026
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