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Hydrogen-bonded organic frameworks (HOFs) possess various merits, such as high porosity, tunable structure, facile modification, and ready regeneration. These properties have yet to be explored in the context of new functional HOF materials. The facile and inexpensive electrophoretic deposition (EPD) method applied in this study generated a transparent HOF film at room temperature in just 2 min and is applicable to other HOFs. The resulting film exhibited reversible electrochromism with the advantage of long cycle life (>500 cycles). More strikingly, this all-organic film could be readily regenerated (through rinsing with DMF and redeposition) and showed tunable electrochromic behavior (through low-cost postsynthetic modification) with the ability to undergo successive color changes, which is difficult to achieve with conventional electrochromic materials. An electrochromic device was manufactured to further demonstrate the application potential of the film.
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http://dx.doi.org/10.1002/anie.202006926 | DOI Listing |
Chem Commun (Camb)
March 2025
Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.
A photochromic ionic hydrogen-bonded organic framework (iHOF-51) was synthesized by reacting organic carboxylic acids with amidinium salts. Fast, reversible, and high-contrast stimulus-responsive behavior anionic radical naphthalenediimide (NDI) is observed. iHOF-51exhibits time-dependent photochromism in the powder state and excellent photoluminescent properties based on the synergistic interaction of FRET and radical anions in the 1%-iHOF-51-PVA composite membrane.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
March 2025
Chinese Academy of Sciences Fujian Institute of Research on the Structure of Matter, State Key Laboratory of Structural Chemistry, 155 Yangqiao road west, 350002, Fuzhou, CHINA.
Proton transport channels in biological systems are constructed by the specific amino acid residues with hanging carboxylic acid groups acting as proton donors and acceptors, enabling rapid proton conduction via the Grotthuss mechanism. Hydrogen-bonded organic frameworks (HOFs) are promising candidates for artificially simulating proton channels due to their designable structure and abundant proton sources in the network. However, these protons were usually immobilized within hydrogen bonds between two building blocks, which require a high energy barrier for initiating proton transport.
View Article and Find Full Text PDFACS Nano
March 2025
State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
In this study, we construct a quantum well effect-based two-dimensional Z-scheme superlattice heteronanostructure photocatalyst constructed from hydrogen-bonded porphyrin organic frameworks (HOFs) and carbon nitride. Porphyrin HOFs extend spectral absorption, while their π-conjugation and electron density variations significantly enhance charge separation and exhibit favorable alignment with the energy levels of carbon nitride, thereby enabling efficient charge transfer. Carboxylic acid channels in the HOFs further promote the decomposition of water molecules, thereby boosting hydrogen production.
View Article and Find Full Text PDFNat Commun
March 2025
Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
Photocatalysis provides a sustainable and environment-friendly strategy to produce HO, yet the catalytic efficiency of HO overall photosynthesis (O + 2HO → 2HO) needs to be further improved, especially in the absence of additional cocatalysts, photosensitizers and sacrificial agents. Here we find that hydrogen-bonded organic frameworks can serve as photocatalysts for HO overall photosynthesis under the above-mentioned conditions. Specifically, we constructed a donor-acceptor hydrogen-bonded organic framework that exhibits a high photocatalytic activity for HO overall photosynthesis, with a production rate of 681.
View Article and Find Full Text PDFAdv Mater
March 2025
Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China.
Luminescent responsive heterostructures with region-domained emission and integrated responsiveness exhibit great potential in information security, but always suffer from the direct exposure of fingerprint information at the initial state, making it easy to decode the hidden confidential information. Herein, the first monochromatic responsive hydrogen-bonded organic framework (HOF) heterostructures are reported based on VIA-group-based framework hybridization toward fully-covert photonic barcodes. Designed HOF blocks with different VIA-group elements are integrated via a configuration-assimilation-based assembly method to generate the intrinsic monochromatic HOF heterostructures.
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