A chemically robust SIFSIX MOF as electrocatalyst in alkaline hydrogen evolution reaction (HER)

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 117, P. 135 - 145

Published: March 15, 2025

Language: Английский

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Pyrene-Linked Covalent Organic Polymer/Single-Walled Carbon Nanotubes Hybrids as High-Performance Electrodes for Supercapacitive Energy Storage

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

Language: Английский

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Mechanistic Insights into the Formation of Nanofibrous Covalent Organic Frameworks (COFs) and their Promotion to the Catalysis of Hydrodechlorination

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract The nanoscale morphologies of COFs deeply affect their performance in practical applications. However, it still lacks studies to well understand formation mechanism for guiding and controlling the synthesis desired nanomorphology. To achieve more mechanistic insights into nanofibrous COFs, herein a series non‐fibrous are synthesized intrinsic relationships among morphology, chemical constituent, structure planarity, DFT calculated interlayer stacking energy investigated comprehensively. study reveals planarity building monomers is not decisive forming COFs. presence electron‐withdrawing triazine group amine electron‐donating ─OH aldehyde essential suppressing growth COF crystallites x‐y plane promoting z ‐direction form morphology can be modulated by functional groups regulating competition between lateral reaction activity energy. prepared exhibited two‐fold increased catalytic better stability than counterpart hydrodechlorination. new proposed here help open up domain precise designing modulating nanomorphology from molecular level specific application.

Language: Английский

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A Precise Preparation Strategy for 2D Nanoporous Thulium-Organic Framework: High Catalytic Performance in CO₂-Epoxide Cycloaddition and Knoevenagel Condensation

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

Published: Feb. 22, 2025

Efficient conversion of carbon dioxide (CO2) into high-value chemicals is viewed as one the most promising approaches for solving problem an energy shortage and serious environment pollution. However, design synthesis confined multifunctional catalysts with in situ engineered task-specific sites nanoporous environments remain a complex challenging task due to lack in-depth understanding their structure reaction mechanism. Herein, we report highly robust 2D framework {[Tm(HFPDC)(DMF)2]·DMF·H2O}n (NUC-120) (H4FPDC = 4,4′-(4-(4-fluorophenyl)pyridine-2,6-diyl)diisophthalic acid). The thermally activated host [Tm(HFPDC)]n (NUC-120a) has following two merits: (i) structure, (ii) massive quantity functional sites. Moreover, NUC-120 NUC-120a display high thermal chemical stability, which have been proved by TGA soaking experiments acid–base water organic solvents. Catalytic that NUC-120a, presence n-Bu4NBr cocatalyst could efficiently catalyze coupling CO2 epoxides under comparatively mild conditions. Furthermore, also displays catalytic performance Knoevenagel condensation reactions aldehydes malononitrile, should be because coexisting Lewis acidic basic can separately activate aldehyde malononitrile molecules. Thereby, this work further provides insight desired materials generated using existing suitable secondary building units (SBUs) meticulously regulating growth environments.

Language: Английский

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Open‐Metal and Carboxamide‐Tethered Redox‐Active Undulated Framework for Mild‐Condition Synthesis of Therapeutic Drugs and Tandem Catalysis with Size‐Selectivity

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

A mixed-ligand-based thermo-chemically robust and undulated metal-organic framework (MOF) is developed that embraces carboxamide moiety-grafted porous channels activation-induced generation of open-metal site (OMS). The guest-free MOF acts as an outstanding heterogeneous catalyst in Hantzsch condensation for electronically assorted substrates with low loading short duration under greener conditions than the reported materials. Besides Lewis acidic OMS, group activates substrate via two-point hydrogen bonding, highlighting effectiveness custom-made functionalities this multi-component reaction. Importantly, demonstrates first ever one-pot synthesis 1,4-dihydropyridine-based antihypertensive drug foridon, along four therapeutic molecules ethidine, nifedipine, nemadipine B Nitrendipine, which are characterized X-ray crystallography besides conventional spectroscopic analyses. integration redox-active Co(II) center acid-base dual sites benefit activated catalyzing mild-condition alcohol oxidation-Knoevenagel to produce benzylidene malononitriles wide tolerance multicyclic performance. For both atom-economic reactions, astutely designed control experiments density functional theory-based reaction energy profile rationalize synergistic catalysis pore-decked antagonistic predominantly transpires inside channel. This study marks a paradigm shift sustainable through task-specific functionality fuelling, provides valuable insights on structure-property synergism at cutting-edge design.

Language: Английский

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Custom-built charged covalent-organic polymer for elevated-temperature boosted separation cum selective and benign fixation of CO2 with bi-phasic iodine scavenging

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158981 - 158981

Published: Dec. 1, 2024

Language: Английский

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Hydrothermal synthesis, structures, and catalytic performance of five coordination compounds driven by 5-aminoisophthalic acid

RSC Advances, Journal Year: 2024, Volume and Issue: 14(38), P. 28160 - 28167

Published: Jan. 1, 2024

The structural and catalytic properties of five new compounds were investigated.

Language: Английский

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