Hydrogen-Bonded Organic Framework Nanosheets with Rich Free Oxygen Atoms for NO₂ Sensing

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Hydrogen-bonded organic frameworks (HOFs) are under fast development in broad applications but have not been well explored for chemiresistive gas sensing yet primarily due to insufficient active sites. Herein, a new porphyrin-based HOF-199 is constructed by OH···O hydrogen bonds featuring layered networks and rich free oxygen (O) atoms, which further exfoliated into few-layer nonosheets with more dangling O sites through an ultrasound-assisted liquid exfoliation method (namely L-HOF-199). Benefiting from electron-donor sites, L-HOF-199 demonstrates exceptional NO2 properties ambient conditions, achieving remarkable 3.25-fold improvement sensitivity (152% toward 5 ppm of NO2) faster response speed (52 s), relative HOF-199. This work provides promising platform the rational design advanced sensors via functional HOF chemistry.

Language: Английский

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Lanthanide Molecular Clusters and Metal–Organic Layers Constructed by Manipulation of Substituents

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Usually, complexes with different connections and shapes are constructed by regulating the substituents. However, it is extremely challenging to construct two lanthanide dimensions only fine-tuning substituents of ligands, especially (−CH3 −CH2CH3) almost similar physical chemical properties. Herein, multidentate chelating connection modes were successfully using a multicomponent "one-pot method" under guidance coordination method (MCC). They 11-nuclear molecular cluster (Dy11) metal–organic layer (2D-Dy). Specifically, when selected ligand an imidazole-2-carboxaldehyde derivative its substituent −CH3, layered 2D-Dy obtained. The linker [Dy(HL1)3] propeller configuration formed Dy(III) ion acylhydrazone (HL1) condensation three salicylhydrazides 1-methyl-1H-imidazole-2-carboxaldehyde. above linkers further linked alternately propeller-shaped [Dy(NO3)3] as secondary building unit (SBU) form 2D-Dy. In addition, changing −CH3 on −CH2CH3, we obtained example Dy11 epitaxial assembly ions hourglass-shaped Dy9 core, formula [Dy11(HL2)8(μ3–OH)8(μ4-O)2(CH3O)4(NO3)4](NO3)5 18CH3OH. was bombarded high-resolution electrospray ionization mass spectrometry (HRESI-MS) peaks various fragments captured. Based peaks, possible fragmentation mechanisms inferred be → Dy4(HL2)4 Dy3(HL2)2 Dy2(HL2)2 Dy(HL2)2 Dy(HL2)2/Dy2(HL2)2/Dy3(HL2)2/Dy4(HL2)4. This work one rare examples where leads formation dimensions, which promotes progress crystal engineering complexes.

Language: Английский

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Comparing Hydrogen-Bonded Organic Frameworks and Metal-Organic Frameworks for Biosensor Applications

TrAC Trends in Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 118211 - 118211

Published: Feb. 1, 2025

Language: Английский

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Hydrogen-bonded organic framework nanoflowers for near-room-temperature sensing

Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 138372 - 138372

Published: March 1, 2025

Language: Английский

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Monochromatic Responsive HOF Heterostructures via VIA‐Group‐Based Framework Hybridization for Fully‐Covert Photonic Barcode

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract 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 at initial state, making it easy to decode hidden confidential information. Herein, first monochromatic hydrogen‐bonded organic framework (HOF) are reported based on VIA‐group‐based hybridization toward fully‐covert photonic barcodes. Designed HOF blocks different VIA‐group elements via a configuration‐assimilation‐based assembly method generate intrinsic heterostructures. Differentiated electronegativity endows each block distinct bonding stability, which triggers actions same stimuli, finally forming multicolor mode state. These can effectively hide information, further demonstrates coding capability as high‐security anti‐counterfeiting labels. findings offer novel insight exploitation smart‐responsive hetero‐HOF systems for advanced encryption anticounterfeiting applications.

Language: Английский

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Algorithm in chemistry: molecular logic gate-based data protection

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review focuses on stimuli-responsive material (SRM)-based data protection, emphasizing the integration of intricate logic and algorithms in SRM-constructed hardware. It also discusses current challenges future directions field.

Language: Английский

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Tunable Room‐Temperature Phosphorescence in Hydrogen‐Bonded Organic Crystals via H‐Bonding Units

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Abstract Organic room‐temperature phosphorescence (RTP) materials with tunable emission colors, lifetime, and quantum yield have important implications for applications in optoelectronics, bioimaging, anti‐counterfeiting. Herein, a facile strategy is presented multi‐parameters switchable RTP by introducing second H‐bonding units (SHUs) capable of adsorption desorption, such as H 2 O DMSO, into hydrogen‐bonded organic crystals. It found that the incorporation molecules HOC‐PM‐H structure establishes robust hydrogen bonding network stabilizes triplet excited states, thereby suppressing non‐radiative transitions extending lifetime to 904 ± 45 ms. In contrast, DMSO HOC‐PM‐DMSO promote separation aggregate leading transition from yellow‐green blue up 63%. The performance can be reversibly switched SHUs. By leveraging temporal spatial changes color, an information security system afterglow displays activated SHUs are developed. SHUs‐activated not only provides platform revealing structure‐property relationships but also offers novel approach designing advanced functional specific luminescent properties.

Language: Английский

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Decoding the Thermal Conductivity of Ionic Covalent Organic Frameworks: Optical Phonons as Key Determinants Revealed by Neuroevolution Potential

Materials Today Physics, Journal Year: 2025, Volume and Issue: unknown, P. 101724 - 101724

Published: April 1, 2025

Language: Английский

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