Polymer Chemistry, Год журнала: 2024, Номер unknown
Опубликована: Янв. 1, 2024
Two emissive hydrazone-linked COFs with abundance of interaction sites were synthesized, showing high sensitivity and selectivity for hydrazine sensing.
Язык: Английский
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(45)
Опубликована: Июль 18, 2024
Abstract Helicenes represent a class of fascinating π compounds with fused yet folded backbones. Despite their broad structural diversity, harnessing helicenes to develop well‐defined materials is still formidable challenge. Here we report the synthesis crystalline porous helicene by exploring synthesize covalent 2D lattices and layered frameworks. Topology‐directed polymerization [6]helicenes porphyrin creates networks alternate helicene‐porphyrin alignment along x y directions at 1.5‐nm interval develops [6]helicene frameworks through reversed anti‐AA stack z direction form segregated columnar arrays. Notably, this configuration enables be highly red luminescent benchmark quantum yields. The trigger effieicnt intra‐framework singlet‐to‐singlet state energy transfer from facilitate intermolecular triplet‐to‐triplet molecular oxygen produce reactive species, harvesting wide range photons ultraviolet near‐infrared regions for light emitting photo‐to‐chemical conversion. This study introduces new family extended frameworks, laying groundwork unprecedented structures functions.
Язык: Английский
Процитировано
6
ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(14), С. 8498 - 8504
Опубликована: Июль 4, 2024
Creating highly emissive covalent organic frameworks (COFs) has traditionally been difficult, owing to strong π–π interactions between adjacent layers, resulting in aggregation-caused quenching properties. In this article, we report the use of a vertex strategy create COFs with enhanced fluorescence performances. This involved introducing different units into COF structure. These including N atoms possessed p orbital lone pairs electrons, which formed p−π conjugation linkages and walls COFs. The from effectively suppressed effect COFs, leading development emission designed were evaluated for their ability detect 2,4,6-trinitrophenol, specific type nitro-explosive, water. demonstrated high sensitivity selectivity 2,4,6-trinitrophenol detection compared other nitro-explosives. summary, controllable is promising method designing enhancing properties, paving way luminescent materials diverse applications.
Язык: Английский
Процитировано
3
Journal of Colloid and Interface Science, Год журнала: 2024, Номер 681, С. 250 - 260
Опубликована: Ноя. 20, 2024
Язык: Английский
Процитировано
3
Microporous and Mesoporous Materials, Год журнала: 2025, Номер 386, С. 113506 - 113506
Опубликована: Янв. 11, 2025
Язык: Английский
Процитировано
0
Trends in Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
Microporous and Mesoporous Materials, Год журнала: 2025, Номер unknown, С. 113579 - 113579
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
0
Chemical Reviews, Год журнала: 2025, Номер unknown
Опубликована: Май 14, 2025
Semiconductors form the foundational bedrock of modern electronics and numerous cutting-edge technologies. Particularly, semiconductors crafted from organic building blocks hold immense promise as next-generation pioneers, thanks to their vast array chemical structures, customizable frontier orbital energy levels bandgap easily adjustable π electronic properties. Over past 50 years, advancements in chemistry materials science have facilitated extensive investigations into small compounds, oligomers, polymers, resulting a rich library semiconductors. However, longstanding challenge persists: how organize units or chains well-defined which are crucial for performance Consequently, pursuit methodologies capable synthesizing and/or fabricating with ordered structures has emerged polymeric semiconductor research. In this context, covalent frameworks (COFs) stand out unique platforms allowing integration periodically thus facilitating development extended yet precisely defined architectures. Since initial report 2008, significant strides been made exploring various chemistries develop semiconducting COFs, properties, functions, applications. This review provides comprehensive focused exploration general structural features outlining basic principles design, illustrating linkage synthetic strategies based on typical one-pot polymerization reactions demonstrate growth bulk materials, nanosheets, films, membranes. By elucidating interactions between COFs entities such photons, phonons, electrons, holes, ions, molecules, spins, categorizes nine distinct sections: semiconductors, photoconductors, light emitters, sensors, photocatalysts, photothermal conversion electrocatalysts, storage electrodes, radical spin focusing disclosing structure-originated properties functions. Furthermore, scrutinizes structure-function correlations highlights features, breakthroughs, challenges associated COFs. Furnished knowledges state-of-the-art insights, predicts fundamental issues be addressed outlines future directions offering overview rapidly evolving remarkable field.
Язык: Английский
Процитировано
0
Microporous and Mesoporous Materials, Год журнала: 2025, Номер unknown, С. 113687 - 113687
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0
Organic Letters, Год журнала: 2025, Номер unknown
Опубликована: Июнь 2, 2025
Azobenzenes are arguably the most frequently used photoswitches, but systems in which benzene units replaced by larger π rare. Azonaphthalene is known, next higher homologue azoanthracene already undergoes irreversible intramolecular cycloaddition during photoisomerization. Such side reactions not possible with rigid diazocines. In present work, we have succeeded integrating triphenylene groups into diazocines, making them azo switches largest aromatic, annulated ring published to date. Both unsubstituted system and several derivatives easy access. The extension of results a molecular switching amplitude compared parent diazocine, should lead better force transmission environment material applications. wavelengths shifted bathochromically visible range, although photostationary equilibria decreased. Potential applications include switchable liquid crystals, mechanophores, photoactuators, many other responsive materials. Particularly noteworthy 4-fold substitution system, allows incorporation systems, e.g. as multifunctional cross-linkers polymers or building blocks COFs MOFs.
Язык: Английский
Процитировано
0
Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124628 - 124628
Опубликована: Сен. 1, 2024
Язык: Английский
Процитировано
2