Huitao Fan

A novel open-framework copper borovanadate with enhanced catalytic performance for oxidation of benzylic C-H bond

A novel open-framework copper borovanadate, with a 6-connected topological net and 1D 8-membered ring channels, has been obtained for the first time. The compound not only exhibits a unique -B3 O7 (OH)-Cu-B(OH)3 linkage and features the largest ratio between TM2+ (Cu2+ ) and the borovanadate anion, but also possesses enhanced catalytic performance, high recyclability, and stability during the oxidation of benzylic C-H bonds.

Synthesis, crystal structure, photophysical property and metal ion-binding behavior of a cyclometalated platinum(II) terpyridylacetylide with efficient π-conjugation degree

A cyclometalated Pt(II) acetylide derivative bearing a carbazole donor and a terpyridine (TPY) receptor has been successfully synthesized and characterized. X-ray crystallography shows its monoclinic crystal system with the P2(1)/c space group and the three-component co-planarity molecular structure. This efficient π-conjugation system displays an intense low-energy absorption band (e = 1.51 × 104 dm3 mol−1 cm−1) at λmax = 442 nm and a strong phosphorescence emission (Φ = 0.045) at λmax = 596 nm in an air-saturated CH2Cl2 solution at room temperature, resulting from the dπ(Pt) → π*(C^N^N) metal-to-ligand charge transfer (MLCT) mixing with the π(CC–Ar) → π*(C^N^N) ligand-to-ligand charge transfer (LLCT) transition. With the introduction of the TPY receptor, this complex possesses ca. 1.6-fold luminescence-enhancing response for Zn2+ and Cd2+ but dramatic luminescence quenching response toward other common transition metal cations. Consecutive titrations exhibit that the added metal ions bond to its free TPY receptor with 1 : 2 stoichiometry to form the heterotrinuclear (Pt–M–Pt) complex. The Fe2+-quenched and Zn2+-enhanced luminescence behaviors with the maximum PET efficiency of 92.4% and 62.7%, respectively, strongly suggest the presence of the intra-molecular energy transfer between the [M(TPY)2]2+ core and the terminal phosphorescent Pt(II) complex units.

Crystal structure of poly[μ3-5-(4-(2,6-di(pyridine-2-yl)pyridine-4-yl)phenoxy)isophthalato-κ5O:O′,O′′:N,N′,N′′cobalt(II)], C29H17CoN3O5

Abstract C29H17CoN3O5, monoclinic, P21/c (no. 14), a = 11.1893(6) Å, b = 13.9922(10) Å, c = 14.1772(7) Å, β = 94.544(5)°, V = 2212.6(2) Å3, Z = 4, Rgt(F) = 0.0460, wRref(F2) = 0.0975, T = 293(2) K.

Crystal structure of diaqua-(acetato-κ3O,O′:O′′)-(μ3-4,6-di(1H-imidazol-1-yl)isophthalato-κ4O:O′:O′′,O′′′)lanthanum(III), C16H15LaN4O8

Abstract C16H15LaN4O8, monoclinic, P21/c (no. 14), a = 13.2370(6) Å, b = 15.4658(5) Å, c = 9.5723(4) Å, β = 108.834(4)°, V = 1854.72(14) Å3, Z = 4, Rgt(F) = 0.0342, wRref(F2) = 0.0814, T = 293(2) K.

Metal- and Multicarboxylate-Dependent Structural Diversity in Metal–Organic Frameworks with Acylamide-Based Ligand

AbstractThree new metal–organic frameworks, [Co2(L)2(ip)2·(H2O)4] (1), [Cu(L)(ip)·(H2O)2] (2), [Cd(µ-H2O)(L)(oip)·(H2O)3.5] (3) (ip = isophthalate, H2oip = 5-hydroxyl-isophthalate), built by acylamide-based ligand and multi-carboxylate ligand were synthesized and structurally characterized by X-ray crystallography. Complex 1 crystallizes in monoclinic space group P21, with a = 9.9171(3), b = 31.9531(10), c = 10.1780(3) Å, β = 118.8270(10)°. Complex 2 crystallizes in the monoclinic space group Cc, with a = 17.7490(3), b = 9.7363(2), c = 18.1202(3) Å, β = 115.0090(10)°. Complex 3 crystallizes in the monoclinic space group P21/c, with a = 9.7670(5), b = 30.3199(15), c = 10.3277(5) Å, β = 102.1680(10)°. All these compounds feature 2D 44 layers with two-fold interpenetration.Graphical AbstractHerein we describe the crystal structures of [Co2(L)2(ip)2(H2O)2]·(H2O)2 (1), [Cu(L)(ip)·(H2O)2] (2), [Cd(µ-H2O)(L)(oip)·(H2O)3.5] (3) (ip = isophthalate, H2oip = 5-hydroxyl-isophthalate). All these compounds feature 2D 44 layers with two-fold interpenetration.