A New Zn(II) Compound: Luminescent Property and Promoting Knee Cartilage Repair by Modulating Iron Death

The hydrothermal reactions of bis{6-{5-methyl-1 H,7 H-[1,2,4]triazolo[1,5-a]pyrimidin-7-one}}methane (L) and Zn(NO3)2·6H2O at 180 ℃ afforded a novel Zn(II) coordination polymer (CP), that is, {[Zn2(L)(µ2-O)2]·3H2O}n (1), which further characterized via Single crystal X-ray diffraction (SCXRD), elemental analysis (EA), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA). Besides, this CP reveals strong luminescence that may be caused by the charge transfer within the ligand. In biological study, the new compound was evaluated for its protective effect on chondrocytes. This compound significantly up-regulated GPX4 and down-regulated HO-1 mRNA levels, thereby inhibiting iron death in chondrocytes.

Hydrogen bond donor functionalized poly(ionic liquid)s for efficient synergistic conversion of CO2 to cyclic carbonates

The development of metal-free, high effective and recyclable catalysts plays a pivotal role in transforming CO2 into high value-added products such as cyclic carbonates. In this paper, we introduced the hydrogen bond donor (HBD) groups into poly(ionic liquid)s via free radical polymerization, which successfully combined the HBD and ionic liquids (ILs) into one heterogeneous catalyst. The HBD could synergistically activate epoxides with hydroxyl functionalized ionic liquids and efficiently catalyze the cycloaddition of CO2 into cyclic carbonates. The yield of propylene carbonate (PC) reached 94% (at 105 °C, 2 MPa CO2, 3 h), which far exceeded poly(ionic liquid)s without HBDs functionalization (PC yield 72%), and even approached bulk ionic liquids (PC yield 95%). Moreover, HBD-functionalized poly(ionic liquid)s (HPILs) exhibited excellent recyclability after five runs and afforded wide substrate scope. According to the experimental results, 1H NMR spectra and density functional theory (DFT) calculations showed 2-hydroxyethyl methacrylate (HEMA) and the hydroxyl of ILs would form strong H-bonds with epoxides contributing to the ring-opening process of epoxides, and a possible HBD and nucleophilic anion synergistically catalytic mechanism was proposed. The method herein paved a brand new way for green technology and utilization of poly(ionic liquid)s.

Crystal structure of catena-poly[bis(μ2-1,4-bis(triazol-1-ylmethyl)benzene-κ2 N:N′)-bis(5-tert-butyl-isophthalate-κO)copper(II)]tetrahydrate, C36H46CuN6O12

C36H46CuN6O12, triclinic, P1̅ (no. 2), a = 8.3759(18) Å, b = 10.749(2) Å, c = 11.873(3) Å, α = 63.165(2)°, β = 82.979(2)°, γ = 80.932(2)°, V = 940.3(3) Å3, Z = 1, R gt(F) = 0.0460, wR ref(F 2) = 0.1107, T = 296(2) K.

Crystal structure of catena-poly[diaqua-(μ2-5-methylisophthalato-κ2 O:O′)(μ2-1,4-bis((1H-1,2,4-triazol-1-yl)methyl)benzene-κ2 N:N′)], NiC21H22O6N6

NiC21H22O6N6, orthorhombic, Pnma, a = 18.214(3) Å, b = 20.934(3) Å, c = 5.5296(8) Å, V = 2108.3(5) Å3, Z = 4, R gt(F) = 0.0279, wR ref(F 2) = 0.798, T = 296(2) K.

Crystal structure of catena-poly[hexakis(μ2-chlorido)-hexakis(4-(1H-pyrazol-5-yl)pyridine-κN)tricadmium(II)], Cd3C48H42Cl6N18

Cd3C48H42Cl6N18, monoclinic, C2/c (no. 15), a = 11.4564(7) Å, b = 21.1547(15) Å, c = 21.3475(13) Å, β = 95.192(5)°, V = 5152.5(6) Å3, Z = 4, R gt(F) = 0.0381, wR ref(F 2) = 0.1152, T = 293(2) K.

Imparting Brønsted acidity into a zeolitic imidazole framework

The impartment of Brønsted acidity into a zeolitic imidazole framework, ZIF-90 has been achieved via post-synthetically oxidizing the aldehyde group into carboxylate group.

Coligand syntheses, crystal structures, luminescence and photocatalytic properties of five coordination polymers based on rigid tetracarboxylic acids and imidazole linkers

Coligand syntheses, crystal structures, luminescence and photocatalytic properties of five coordination polymers based on rigid tetracarboxylic acids and imidazole linkers.

Structural diversity of five coordination polymers based on 2,6-bis(3,5-dicarboxyphenyl)pyridine ligand: solvothermal syntheses, structural characterizations, and magnetic properties

Five CPs, featuring diverse structures, have been assembled from the mixed ligands of H₄BDP and bib under different reaction conditions.