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Selectively regulating and UV–visible-NIR full spectrum blocked ECD based on single molecule-multivalences & resonances strategy.

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Title: Selectively regulating and UV–visible-NIR full spectrum blocked ECD based on single molecule-multivalences & resonances strategy.
Authors: Ling, Huan1,2,3 (AUTHOR) 15602150032@163.com, Wu, Shuangdui1,4,5 (AUTHOR), Han, Jingxin6 (AUTHOR), Zhang, Jie2 (AUTHOR), Lin, Borong1,4,5 (AUTHOR) linbr@tsinghua.edu.cn, Zeng, Xiping1,3 (AUTHOR) xzengad@connect.ust.hk, Wang, Yu1,2 (AUTHOR) wangyu@szu.edu.cn
Source: Chemical Engineering Journal. May2026, Vol. 535, pN.PAG-N.PAG. 1p.
Subjects: Electrochromic devices, Multivalent molecules, Optical modulation, Ab-initio calculations, Thiophene derivatives
Abstract: Full-spectrum blocked electrochromic devices (ECD) suffered from color mixing methods involving multiple optically complementary EC molecules, resulting in complex fabrication processes and poor stability. In this study, a novel strategy termed "single molecule-multivalence & resonances" (SMMR) was introduced. A tetra-pyridinium salt substituted thiophene compound, TTMP, was synthesized, featuring four resonance hybrids and twelve resonance structures. The combination of these distinct yet spectrum-complementary EC resonance hybrids enabled full spectrum blocking in UV–visible to near-infrared (NIR) range, with multiple resonance structures contributing to high stability. The newly developed TTMP-based ECD exhibited high average optical modulation (60.2% in the visible region (380–800 nm) and 65.5% in the NIR region (800–1400 nm)) at a low voltage of 1.2 V, and excellent stability (only 3.3% degradation after 20,000 cycles). Electrochemical energy storage and insulation experiments demonstrated the potential of the ECD for use in EC supercapacitors and solar heat shielding displays. Theoretical calculations using TD-DFT provided insights into the red shift, full spectrum blocking, and selective vis-NIR light regulation capabilities of the ECD. Building simulations indicated significant energy-saving potential of EC windows in various climate zones, with greater energy savings observed in cities with four seasons and hotter climates, reaching over 10%. • Novel SMMR Strategy : A "single molecule-multivalence & resonances" (SMMR) approach enables full-spectrum (UV–Vis-NIR) blocking with one molecule (TTMP). • Ultra-Low Transmittance & High Stability ECD : Achieving near-zero transmittance (0% UV, 4.7% Vis, 7.1% NIR) in colored state with only 3.3% degradation after 20,000 cycles. • Smart Light-Heat Regulation : Realizing three tunable modes (bright/hot, dark/hot, dark/cool) via voltage control (0 V, 0.9 V, 1.2 V) for adaptive light and heat management. • Theoretical & Practical Impact : TD-DFT calculations reveal structure-performance relationships; building simulations predict >10% energy savings in diverse climates. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Journal is the property of Elsevier B.V. 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: 192968713
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  Data: Selectively regulating and UV–visible-NIR full spectrum blocked ECD based on single molecule-multivalences & resonances strategy.
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  Data: <searchLink fieldCode="AR" term="%22Ling%2C+Huan%22">Ling, Huan</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> 15602150032@163.com</i><br /><searchLink fieldCode="AR" term="%22Wu%2C+Shuangdui%22">Wu, Shuangdui</searchLink><relatesTo>1,4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Jingxin%22">Han, Jingxin</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jie%22">Zhang, Jie</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Borong%22">Lin, Borong</searchLink><relatesTo>1,4,5</relatesTo> (AUTHOR)<i> linbr@tsinghua.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Xiping%22">Zeng, Xiping</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> xzengad@connect.ust.hk</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Yu%22">Wang, Yu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> wangyu@szu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Journal%22">Chemical Engineering Journal</searchLink>. May2026, Vol. 535, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Electrochromic+devices%22">Electrochromic devices</searchLink><br /><searchLink fieldCode="DE" term="%22Multivalent+molecules%22">Multivalent molecules</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+modulation%22">Optical modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Ab-initio+calculations%22">Ab-initio calculations</searchLink><br /><searchLink fieldCode="DE" term="%22Thiophene+derivatives%22">Thiophene derivatives</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Full-spectrum blocked electrochromic devices (ECD) suffered from color mixing methods involving multiple optically complementary EC molecules, resulting in complex fabrication processes and poor stability. In this study, a novel strategy termed "single molecule-multivalence & resonances" (SMMR) was introduced. A tetra-pyridinium salt substituted thiophene compound, TTMP, was synthesized, featuring four resonance hybrids and twelve resonance structures. The combination of these distinct yet spectrum-complementary EC resonance hybrids enabled full spectrum blocking in UV–visible to near-infrared (NIR) range, with multiple resonance structures contributing to high stability. The newly developed TTMP-based ECD exhibited high average optical modulation (60.2% in the visible region (380–800 nm) and 65.5% in the NIR region (800–1400 nm)) at a low voltage of 1.2 V, and excellent stability (only 3.3% degradation after 20,000 cycles). Electrochemical energy storage and insulation experiments demonstrated the potential of the ECD for use in EC supercapacitors and solar heat shielding displays. Theoretical calculations using TD-DFT provided insights into the red shift, full spectrum blocking, and selective vis-NIR light regulation capabilities of the ECD. Building simulations indicated significant energy-saving potential of EC windows in various climate zones, with greater energy savings observed in cities with four seasons and hotter climates, reaching over 10%. • Novel SMMR Strategy : A "single molecule-multivalence & resonances" (SMMR) approach enables full-spectrum (UV–Vis-NIR) blocking with one molecule (TTMP). • Ultra-Low Transmittance & High Stability ECD : Achieving near-zero transmittance (0% UV, 4.7% Vis, 7.1% NIR) in colored state with only 3.3% degradation after 20,000 cycles. • Smart Light-Heat Regulation : Realizing three tunable modes (bright/hot, dark/hot, dark/cool) via voltage control (0 V, 0.9 V, 1.2 V) for adaptive light and heat management. • Theoretical & Practical Impact : TD-DFT calculations reveal structure-performance relationships; building simulations predict >10% energy savings in diverse climates. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Engineering Journal is the property of Elsevier B.V. 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:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.cej.2026.175626
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Electrochromic devices
        Type: general
      – SubjectFull: Multivalent molecules
        Type: general
      – SubjectFull: Optical modulation
        Type: general
      – SubjectFull: Ab-initio calculations
        Type: general
      – SubjectFull: Thiophene derivatives
        Type: general
    Titles:
      – TitleFull: Selectively regulating and UV–visible-NIR full spectrum blocked ECD based on single molecule-multivalences & resonances strategy.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Ling, Huan
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          Name:
            NameFull: Wu, Shuangdui
      – PersonEntity:
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            NameFull: Han, Jingxin
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            NameFull: Zhang, Jie
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            NameFull: Lin, Borong
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            NameFull: Zeng, Xiping
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            NameFull: Wang, Yu
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          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 13858947
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              Value: 535
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            – TitleFull: Chemical Engineering Journal
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