Hydrogen‐Bonded Organic Frameworks as an Appealing Platform for Luminescent Sensing

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: April 19, 2024

Abstract Hydrogen‐bonded organic frameworks (HOFs), a novel subclass of porous crystalline materials self‐assembled from linkers through hydrogen bonding and other intermolecular interactions, have emerged as an exciting platform for developing multifunctional materials. Recently, luminescent HOF sensors drawn considerable attention due to their unique advantages, such hydrogen‐bonding flexibility, inherent centers in linkers, ease functionalization, low density toxicity, good stability. However, comprehensive study on the design strategies, functionalities, applications HOFs sensing is lacking. In this review, uniqueness development are outlined. The principles strategies enable performance summarized, including pre‐design post‐modification with additional species. state‐of‐the‐art advances diverse overviewed, detection chemical pollutants, biomolecules, gases, physical factors like temperature mechanical forces. Moreover, current challenges corresponding potential avenues discussed. This review aims inspire more innovative research fabrication advanced functions.

Language: Английский

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Ion Exchange‐Mediated 3D Cross‐Linked ZIF‐L Superstructure for Flexible Electrochemical Energy Storage

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(36)

Published: June 17, 2024

Metal-organic frameworks (MOFs) are considered as a promising candidate for advancing energy storage owing to their intrinsic multi-channel architecture, high theoretical capacity, and precise adjustability. However, the low conductivity poor structural stability lead unsatisfactory rate cycling performance, greatly hindering practical application. Herein, we propose sea urchin-like Co-ZIF-L superstructure using molecular template induce self-assembly followed by ion exchange method, which shows improved conductivity, successive channels, stability. The can gradually etch superstructure, leading reconstruction of with three-dimensional (3D) cross-linked ultrathin porous nanosheets. Moreover, control Co Ni ratios construct effective micro-electric field synergistically enhance rapid transfer electrons electrolyte ions, improving CoNi-ZIF-L.

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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Differentiated Intra‐Ligand Charge Transfer Boosting Multicolor Responsive MOF Heterostructures as Robust Anti‐Counterfeiting Labels

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Metal-organic framework (MOF) heterostructures with hybrid architectures and abundant functional sites possess great potential applications in advanced information security, yet still suffer from the harsh stimuli mechanisms restrained emission control. Herein, differentiated design strategy on intra-ligand charge transfer is first reported to realize smart-responsive multicolor MOF as robust anticounterfeiting labels. Designed similar blocks are integrated via time-dependent epitaxial growth form heterostructures. Different numbers of electron-donating groups offer distinct space regulation torsion ligands, which trigger diverse responsive emissions under same mild stimuli, thus generating multiple tunable color patterns These spatial-resolved stable modes permit encoding fingerprint information, further functions anti-counterfeiting labels high-security convert states. results a promising route for function-oriented exploitation heterosystems anticounterfeiting.

Language: Английский

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Engineering Supramolecular Binding Sites in an Ultrastable and Hydrophobic Metal–Organic Framework for C₂H₆/C₂H₄ Separation

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

Published: April 7, 2025

The separation of ethane (C2H6) from ethylene (C2H4) is critical for obtaining polymer-grade C2H4. Adsorptive with C2H6-selective MOFs offers a viable alternative to energy-intensive cryogenic distillation, enabling the direct production high-purity In this study, we developed an ultrastable ethane-selective metal-organic framework, UiO-67-(CH3)2, which demonstrates enhanced C2H6 adsorption (4.10 mmol g-1 at 1 bar and 298 K), higher C2H6/C2H4 selectivity 1.70, increased ratio 1.53 compared unmodified UiO-67. GCMC simulations demonstrate that forms more C-H···π interactions surrounding benzene rings C-H···C methyl groups C2H4, highlighting synergistic effects supramolecular interactions. Furthermore, hydrophobic pore environment also minimizes water interference, exceptionally low uptake (0.019 g 60% RH), ensuring robust capacity under high humid conditions. introduction not only significantly enhances performance but improves material's hydrophobicity.

Language: Английский

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On-Crystal Optical Modulator from Polarized Propagation of Lanthanide-Titanium Nanoclusters

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

The orientation and magnitude of optical polarization in trivalent lanthanides (Ln³⁺) depend on the directional arrangement individual transition dipole moments (TDMs), rendering great difficulty achieving polarized propagation that is highly determined by packing symmetry compositional coordination atomic precision. Here, we obtained crystals organic-monolayer protected titanium-alloyed lanthanide nanoclusters (i.e., Eu₈Ti₁₀ NCs), where TDMs Eu³⁺ ions generate typically orthogonal behaviors π/σ-light) from ⁵D₀→⁷F_1,2 transition. Most importantly, Eu₈Ti₁₀ single crystal presents a remarkable with unprecedented anisotropy relevant to crystallographic axis, thus resulting an on-crystal modulator.

Language: Английский

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Coordination-Defect-Driven Construction of Responsive Pure-MOF Microspheres for Switchable Mode-Dependent Anticounterfeiting Labels

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Luminescent metal–organic frameworks (MOFs) with exceptional dynamics and diverse active sites possess tremendous potential in information security anticounterfeiting applications. However, traditional MOF systems are based on broadband spectral signals spectrum overlap, which easily leads to low-resolution signal identification, compromising the overall level. Here, we report coordination-defect-induced amorphous pure-MOF microsphere switchable whispering-gallery-mode (WGM) as a mode-dependent platform. Amorphous microspheres prepared by chlorine coordination-defect-driven growth strategy aperiodic arrangement coordinate networks. The as-prepared well-defined circular morphology display typical WGM resonance dimension-dependent character, permitting creation of photonic barcodes substantial encoding capacity. Furthermore, exhibit optical mode switching behavior due reversible framework shrinkage, enables design covert labels, finally demonstrating responsive coding property enhanced security. results provide novel for exploring an MOF-based platform encryption anticounterfeiting.

Language: Английский

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Cooperative Immobilization of Transition-Metal Clusters into Kagome-Type Metal–Organic Framework for C₂H₂/CO₂ Separation

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

There has long been a pursuit for metal–organic framework (MOF)-based adsorbent various hydrocarbon separations. Herein, we utilized simple trimesic acid and 1,2,4-triazole, together with the heterometallic strategy to produce two quaternary MOFs kgm-type structure. The cooperative coordination allows immobilization of metal clusters into pore channels, creating an appropriate size high density open sites. resulting material shows excellent C2H2/CO2 separation performance good stability.

Language: Английский

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Ion Exchange‐Mediated 3D Cross‐Linked ZIF‐L Superstructure for Flexible Electrochemical Energy Storage

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(36)

Published: June 17, 2024

Abstract Metal–organic frameworks (MOFs) are considered as a promising candidate for advancing energy storage owing to their intrinsic multi‐channel architecture, high theoretical capacity, and precise adjustability. However, the low conductivity poor structural stability lead unsatisfactory rate cycling performance, greatly hindering practical application. Herein, we propose sea urchin‐like Co‐ZIF‐L superstructure using molecular template induce self‐assembly followed by ion exchange method, which shows improved conductivity, successive channels, stability. The can gradually etch superstructure, leading reconstruction of with three‐dimensional (3D) cross‐linked ultrathin porous nanosheets. Moreover, control Co Ni ratios construct effective micro‐electric field synergistically enhance rapid transfer electrons electrolyte ions, improving CoNi‐ZIF‐L. 6.53 Ni‐ZIF‐L electrode exhibits specific capacity (602 F g −1 at 1 A ) long (95.3 % retention after 4,000 cycles 5 ). Ni‐ZIF‐L//AC asymmetric flexible supercapacitor employing gel also excellent (93.3 4000 This discovery provides valuable insights material selection efficiency improvement.

Language: Английский

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Supramolecular systems and their connection with metal–organic structures

Frontiers in Chemistry, Journal Year: 2024, Volume and Issue: 12

Published: Nov. 5, 2024

Supramolecular structures with specific applications are a pillar in several areas of science. Thus, from contemporary point view, there reasons to embrace systematic order the supramolecular concept itself. First, structuring material seems safer now than it did decades ago. Second, interactions metal–organic frameworks (MOFs) and chemistry and, conversely, supramolecularity assemble MOFs create efficient complex systems multiple cutting-edge an image be safeguarded. Third, perhaps we should simply limit ourselves considering how researchers these fields have attempted correlate notion by linking self-assembly considerations. In any case, topics present advantages optimize innovative geometries that useful highlight significant practical applications. This review covers general introduction supramolecularity, key unit study presented here, followed survey recent advances confined space chemistry, relationships structures, synthesis electrochemistry switchable obtain greater understanding structure–property relationships. To conclude, some future perspectives on this promising plausible field science will mentioned.

Language: Английский

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