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   Articles with "heptazine" as a keyword



Heptazine-based Ordered-Distorted Copolymers with Enhanced Visible-light Absorption for Photocatalytic Hydrogen Production.

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recommendations! Published in 2022 at "ChemSusChem"

DOI: 10.1002/cssc.202201616

Abstract: Poly heptazine imide (PHI), one of the attractive allotropes of polymeric carbon nitride, has recently received extensive attention in photocatalysis due to its extended conjugation for fast separation and transfer of the charges. However, pristine… read more here.

Keywords: heptazine; ordered distorted; hydrogen production; visible light ... See more keywords

Oxygenated Triazine-Heptazine Heterostructure Creates an Enormous Ascension to the Visible Light Photocatalytic Hydrogen Evolution Performance of Porous C3 N4 Nanosheets.

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recommendations! Published in 2023 at "Small"

DOI: 10.1002/smll.202301579

Abstract: A highly efficient g-C3 N4 photocatalyst is developed by a novel one-pot thermal polymerization method under a salt fog environment generated by heating the aqueous solution of urea and mixed metal salts of NaCl/KCl, namely… read more here.

Keywords: heptazine; triazine heptazine; heptazine heterostructure; visible light ... See more keywords

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine-Heptazine Homojunction.

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recommendations! Published in 2024 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.4c01333

Abstract: Establishing homojunctions at the molecular level between different but physicochemically similar phases belonging to the same family of materials is an effective approach to promoting the photocatalytic activity of polymeric carbon nitride (CN) materials. Here,… read more here.

Keywords: heptazine; triazine heptazine; carbon nitride; heptazine homojunction ... See more keywords

Optimizing the Optical Absorption of Poly(heptazine imide) by the n → π* Electron Transition for Improved Photocatalytic H2 Evolution.

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recommendations! Published in 2022 at "ACS applied materials & interfaces"

DOI: 10.1021/acsami.2c12959

Abstract: Poly(heptazine imide) (abbreviated as PHI), a heptazine-based crystalline carbon nitride photocatalyst, has attracted widespread attention in the photocatalytic H2 evolution benefiting from its high crystallinity. Nevertheless, the optical absorption range of the directly synthesized PHI… read more here.

Keywords: heptazine; photocatalytic evolution; optical absorption; phi ... See more keywords

Calcium Poly(Heptazine Imide): A Covalent Heptazine Framework for Selective CO2 Adsorption.

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recommendations! Published in 2022 at "ACS nano"

DOI: 10.1021/acsnano.1c08912

Abstract: Potassium poly(heptazine imide) (KPHI) has recently garnered attention as a crystalline carbon nitride framework with considerable photoelectrochemical activity. Here, we report a Ca2+-complexed analogue of PHI: calcium poly(heptazine imide) (CaPHI). Despite similar polymer backbone, CaPHI… read more here.

Keywords: heptazine; caphi; framework; heptazine imide ... See more keywords

Tip-Induced Nitrene Generation

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recommendations! Published in 2025 at "ACS Nano"

DOI: 10.1021/acsnano.5c08710

Abstract: We generated trinitreno-s-heptazine, a small molecule featuring three nitrene centers, by tip-induced chemistry from the precursor 2,5,8-triazido-s-heptazine on bilayer NaCl on Au(111). The precursor’s azide groups were dissociated to form mono-, di- and trinitreno-s-heptazine, yielding… read more here.

Keywords: heptazine; nitrene centers; tip induced; trinitreno heptazine ... See more keywords

Supramolecular Polymerization as a Tool to Reveal the Magnetic Transition Dipole Moment of Heptazines

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recommendations! Published in 2024 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.4c02174

Abstract: Heptazine derivatives have attracted significant interest due to their small S1-T1 gap, which contributes to their unique electronic and optical properties. However, the nature of the lowest excited state remains ambiguous. In the present study,… read more here.

Keywords: heptazine; transition dipole; transition; dipole moment ... See more keywords

Solvent-Free Isomerization of Heptazine-Trialkoxyl Derivatives Featuring the Efficient Intermolecular Rearrangements

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recommendations! Published in 2025 at "Materials Chemistry Frontiers"

DOI: 10.1039/d5qm00246j

Abstract: Graphitic carbon nitrides (GCNs) have garnered broad research interest due to their potential in various applications. This study reveals a unique characteristic of heptazine, a repeating structural unit of GCN.... read more here.

Keywords: heptazine; heptazine trialkoxyl; free isomerization; isomerization heptazine ... See more keywords