Zinc-based polymers with N-heterocyclic ligands: multifunctional fluorescent sensors for Fe3+, Cr2O72- and ceftriaxone sodium (CRO)

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 142485 - 142485

Published: April 1, 2025

Language: Английский

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Thiazolo[5,4-d]thiazole-Based Metal–Organic Framework for Catalytic CO₂ Cycloaddition and Photocatalytic Benzylamine Coupling Reactions

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(47), P. 19288 - 19297

Published: Nov. 13, 2023

Metal–organic frameworks (MOFs) with permanent porosity and multifunctional catalytic sites constructed by two or more organic ligands are regarded as effective heterogeneous catalysts to improve certain reactions. In this work, a pillared-layer Zn-MOF (MOF-LS10) was 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine (H4TCPP) 2,5-di(pyridin-4-yl)thiazolo[5,4-d]thiazole (DPTZTZ). After activation, MOF-LS10 has moderate CO2 adsorption capacity. The introduction of thiazolo[5,4-d]thiazole (TZTZ), photoactive unit, into the framework endows excellent photocatalytic performance. can not only efficiently catalyze formation cyclic carbonates from epoxide substrates under mild conditions but also photocatalyze benzylamine coupling at room temperature. addition, we used another 1,2,4,5-tetrakis(4-carboxyphenyl)benzene (H4BTEB) 1,4-di(pyridin-4-yl)benzene (DPB) synthesize MOF-LS11 (constructed BTEB4– DPTZTZ) MOF-LS12 TCPP4– DPB) in order explore whether pyrazine structural unit TZTZ synergistically reaction. electron paramagnetic resonance spectrum demonstrates that superoxide radical (·O2–), generated transfer MOF excited light oxidant, is main active substance oxidation. design synthesis provide an synthetic strategy for development versatile various reactions wide range substrates.

Language: Английский

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Defect-engineered indium–organic framework displays the higher CO2 adsorption and more excellent catalytic performance on the cycloaddition of CO2 with epoxides under mild conditions

Molecular Diversity, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 14, 2024

Language: Английский

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Robust {Cd₂Zn}_n–Organic Framework for Efficiently Catalyzing CO₂ Cycloaddition and Knoevenagel Condensation

Crystal Growth & Design, Journal Year: 2023, Volume and Issue: 23(9), P. 6701 - 6711

Published: Aug. 3, 2023

Generally, mixed-metal-based metal–organic frameworks (MOFs) own a broader application prospect such as gas adsorption, catalysis, and energy conversion because of their better physicochemical properties, which inspire us to develop new heterometallic materials by using designed multifunctional organic ligands. Herein, highly robust CdZn–organic framework {(Me2NH2)5[Cd2Zn(CPPDA)2(H2O)2]·5DMF·4H2O}n (NUC-86) was obtained the ligand 4,4′-(4-(4-carboxyphenyl)pyridine-2,6-diyl)diisophthalic acid (H5CPPDA), contains five carboxyl groups with three kinds coordination modes μ1-η1:η1 μ1-η1:η0 coordinate Cd2+ Zn2+ ions. In NUC-86, ions are bridged CPPDA5– form two-dimensional (2D) layer [Cd2(CPPDA)]n double-stranded left-handed chains [Cd2(COO)3(H2O)]n secondary building units (SBUs). Furthermore, 2D layers propagated into three-dimensional host [Cd2Zn(CPPDA)(H2O)]n via [Zn(COO)4] units. As result, there rich Lewis acid–base sites Cd2+, Npyridine, oxygen atoms on inner surface void volume, activated NUC-86a has moderate adsorption capacity for CO2 displays high heterogeneous catalytic performance cycloaddition epoxides Knoevenagel condensation aldehydes malononitrile under mild conditions. Therefore, this work provides perspective more practical structural design MOFs, can be potentially applied in wider fields adsorption–separation–storage, proton conduction, fluorescence sensing, so on.

Language: Английский

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Sulfonylcalix[4]arene-based Al4 clusters: three aluminum oxo clusters with different coordinated solvents for the CO2 cycloaddition reaction

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(23), P. 8502 - 8509

Published: Jan. 1, 2024

By using a macrocyclic H 4 BTC4A-SO 2 ligand, we successfully synthesized three Al clusters with different solvents, which exhibit potentials to expose metal active sites for the catalytic reaction. of cycloaddition carbon dioxide.

Language: Английский

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Nanoporous Thulium(III)–Organic Framework for High Catalytic Performance on the CO₂-Epoxide Cycloaddition

Crystal Growth & Design, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 8, 2024

Considering that the greenhouse effect is most concerning environmental issue globally, selective capture and resource utilization of CO2 have attracted widespread attention. Herein, we report a highly robust thulium(III)–organic framework {[Tm2(μ2-OH)(CPPDDA)(H2O)2]·3DMF·2H2O}n (NUC-108), which obtained from exquisite combination undocumented multifunctional clusters [Tm4(μ2-OH)2(COO)10(H2O)4] organic ligands 4,4′-(4-(4-carboxyphenyl)pyridine-2,6-diyl)diisophthalic acid (H5CPPDDA). NUC-108 possesses following unique merits: (i) functional tetranuclear rare-earth serve as nodes, in Tm3+ ions can be activated Lewis sites μ2-OH anions are base sites; (ii) high-porosity zeolite architecture contains three kinds channels: 12.29 × 9.74 Å2 8.92 4.97 along b axis 12.76 8.95 c axis; (iii) uncoordinated pyridine moieties further endow host with functionality; (iv) resistance to weak acidic alkaline aqueous solutions well various solvents. Notably, NUC-108a effectively separate binary CO2/CH4 mixture high adsorption selectivity, should due enough basic groups moieties. Furthermore, under mild conditions without any solvent, also used an effective recoverable catalyst facilitate cycloaddition epoxides aid tetrabutylammonium bromide. Hence, these findings beneficial for guiding development stable active catalysts carbon utilization.

Language: Английский

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