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Amplified Dimensionality Effect from 2D to 3D Covalent Organic Frameworks for Enhanced Fluorescent Sensing of Nitroaromatic Explosives.

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Title: Amplified Dimensionality Effect from 2D to 3D Covalent Organic Frameworks for Enhanced Fluorescent Sensing of Nitroaromatic Explosives.
Authors: Song, Jia-Long1 (AUTHOR), Ren, Jun-Xia2 (AUTHOR), Miao, Bo2 (AUTHOR), Huang, Zheng-Hao1 (AUTHOR), Lv, Xiao1 (AUTHOR), Cheng, Lei1 (AUTHOR), Huang, Run-Lin1 (AUTHOR), Huang, Yu-Xuan1 (AUTHOR), Zhong, Tian3 (AUTHOR), Liu, Yao-Zu2 (AUTHOR) yaozuliu@jlu.edu.cn, An, Jing1 (AUTHOR) anjing@jluzh.edu.cn, Fang, Qian-Rong2 (AUTHOR)
Source: Chinese Journal of Polymer Science (Springer Science & Business Media B.V.). May2026, Vol. 44 Issue 5, p1373-1380. 8p.
Subjects: Explosives detection, Nitroaromatic compounds, Photoluminescence, Photoinduced electron transfer, Fluorescent probes, Polymer structure
Abstract: Efficient detection of nitroaromatic explosives remains a great challenge, and covalent organic frameworks (COFs) incorporating aggregation-induced emission (AIE) units provide a promising platform for high-performance fluorescent sensing. Herein, we designed and synthesized both two-dimensional (2D) and three-dimensional (3D) AIE-active COFs to systematically investigate how dimensional differences (pore architecture, charge transfer efficiency, and AIE behavior) regulate sensing performance. Through a "4+4" imine condensation strategy, a 2D sql topological COF (TPPDA-TPTPE) was obtained from a planar tetraamine (TPPDA), whereas a 3D pts topological COF (JUC-646) was constructed from a twisted tetraamine (BMTA) with Td geometry—using the same TPTPE linker. Both COFs exhibit high crystallinity, stability, and strong AIE-derived luminescence, but show strikingly different sensing performances. In particular, JUC-646 achieves a quenching constant of 6.99×104 L/mol toward 2,4,6-trinitrophenol (TNP), nearly five times higher than that of TPPDA-TPTPE. This superior performance originates from the 3D open-channel structure (facilitating analyte diffusion), enhanced host-guest interactions, and energetically favorable photoinduced electron transfer—all of which are derived from dimensional differences. This comparative study explicitly establishes a structure-function relationship between framework dimensionality and sensing performance, offering direct guidance for the rational design of AIE-active COFs with tailored dimensionality for efficient explosive detection. [ABSTRACT FROM AUTHOR]
Copyright of Chinese Journal of Polymer Science (Springer Science & Business Media B.V.) is the property of Springer Nature 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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  Data: Amplified Dimensionality Effect from 2D to 3D Covalent Organic Frameworks for Enhanced Fluorescent Sensing of Nitroaromatic Explosives.
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  Data: <searchLink fieldCode="AR" term="%22Song%2C+Jia-Long%22">Song, Jia-Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ren%2C+Jun-Xia%22">Ren, Jun-Xia</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Miao%2C+Bo%22">Miao, Bo</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Zheng-Hao%22">Huang, Zheng-Hao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lv%2C+Xiao%22">Lv, Xiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Lei%22">Cheng, Lei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Run-Lin%22">Huang, Run-Lin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Yu-Xuan%22">Huang, Yu-Xuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhong%2C+Tian%22">Zhong, Tian</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Yao-Zu%22">Liu, Yao-Zu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> yaozuliu@jlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22An%2C+Jing%22">An, Jing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> anjing@jluzh.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Fang%2C+Qian-Rong%22">Fang, Qian-Rong</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Chinese+Journal+of+Polymer+Science+%28Springer+Science+%26+Business+Media+B%2EV%2E%29%22">Chinese Journal of Polymer Science (Springer Science & Business Media B.V.)</searchLink>. May2026, Vol. 44 Issue 5, p1373-1380. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Explosives+detection%22">Explosives detection</searchLink><br /><searchLink fieldCode="DE" term="%22Nitroaromatic+compounds%22">Nitroaromatic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Photoinduced+electron+transfer%22">Photoinduced electron transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Fluorescent+probes%22">Fluorescent probes</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+structure%22">Polymer structure</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Efficient detection of nitroaromatic explosives remains a great challenge, and covalent organic frameworks (COFs) incorporating aggregation-induced emission (AIE) units provide a promising platform for high-performance fluorescent sensing. Herein, we designed and synthesized both two-dimensional (2D) and three-dimensional (3D) AIE-active COFs to systematically investigate how dimensional differences (pore architecture, charge transfer efficiency, and AIE behavior) regulate sensing performance. Through a "4+4" imine condensation strategy, a 2D sql topological COF (TPPDA-TPTPE) was obtained from a planar tetraamine (TPPDA), whereas a 3D pts topological COF (JUC-646) was constructed from a twisted tetraamine (BMTA) with Td geometry—using the same TPTPE linker. Both COFs exhibit high crystallinity, stability, and strong AIE-derived luminescence, but show strikingly different sensing performances. In particular, JUC-646 achieves a quenching constant of 6.99×104 L/mol toward 2,4,6-trinitrophenol (TNP), nearly five times higher than that of TPPDA-TPTPE. This superior performance originates from the 3D open-channel structure (facilitating analyte diffusion), enhanced host-guest interactions, and energetically favorable photoinduced electron transfer—all of which are derived from dimensional differences. This comparative study explicitly establishes a structure-function relationship between framework dimensionality and sensing performance, offering direct guidance for the rational design of AIE-active COFs with tailored dimensionality for efficient explosive detection. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Chinese Journal of Polymer Science (Springer Science & Business Media B.V.) is the property of Springer Nature 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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        Value: 10.1007/s10118-025-3531-3
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      – Code: eng
        Text: English
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        StartPage: 1373
    Subjects:
      – SubjectFull: Explosives detection
        Type: general
      – SubjectFull: Nitroaromatic compounds
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      – SubjectFull: Photoluminescence
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      – SubjectFull: Photoinduced electron transfer
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      – SubjectFull: Polymer structure
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      – TitleFull: Amplified Dimensionality Effect from 2D to 3D Covalent Organic Frameworks for Enhanced Fluorescent Sensing of Nitroaromatic Explosives.
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              Text: May2026
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              Y: 2026
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