Wen-Tong Chen

A three-dimensional porous and magnetic framework constructed from copper salt and 5-Methyltetrazole: [Cu8(Metz)9](OH)·xH2O

A new compound of [Cu8(Metz)9](OH)·xH2O (x≈3) (1) (Metzxa0=xa05-Methyltetrazole) has been prepared and characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. The crystal is of hexagonal, space group P63/m with axa0=xa0bxa0=xa013.988(1)xa0Å, cxa0=xa016.309(2)xa0Å, αxa0=xa0βxa0=xa090°, γxa0=xa0120°, Vxa0=xa02xa0763.5 (4)xa0Å3, Mrxa0=xa01327.13, Dcxa0=xa01.595xa0gxa0cm−3, Zxa0=xa02, F(000)xa0=xa01xa0316, μxa0=xa03.076xa0mm−1, the final Rxa0=xa00.0494 and wRxa0=xa00.1532 for 1,731 observed reflections (Ixa0>xa02σ(I)). In this compound, the [(CuII)2(CuI)6(Metz)9]+ cationic clusters are connected together through CuI cations and Metz ligands and result in a three-dimensional framework. Remarkable, three-dimensional intersecting channels exist in it. The variable temperature magnetic investigations indicate that 1 exhibits typical antiferromagnetic behaviors. N2 gas adsorption measurements at 77xa0K showed that compound 1 possesses permanent porosities.

SYNTHESIS, STRUCTURE AND LUMINESCENCE OF A HYDROGEN-BONDING HELICAL-CHAIN CU (II) COMPOUND BASED ON (8-QUINOLINYLOXY)ACETATE

A new compound of CuCl(QOA)(H2O) (1) [QOAxa0=xa0(8-quinolinyloxy)acetate] has been prepared and characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. The crystal is of orthorhombic, space group P212121 with axa0=xa05.364(1)xa0Å, bxa0=xa013.876(3)xa0Å, cxa0=xa015.435(3)xa0Å, Vxa0=xa01,148.8(4)xa0Å3, Mrxa0=xa0319.19, Dcxa0=xa01.846xa0gxa0cm−3, Zxa0=xa04, F(000)xa0=xa0644, μxa0=xa02.138xa0mm−1, flack parameterxa0=xa00.00(17), the final Rxa0=xa00.0311 and wRxa0=xa00.0646 for 2,179 observed reflections (Ixa0>xa02σ(I)). Compound 1 consists of one-dimensional helical chains deriving from CuCl(QOA)(H2O) units linked by hydrogen bonds and further extend into a 3D supramolecular structure through Van der Waals interactions, and it exhibits strong luminescent emission at room temperature.

Hydrothermal Synthesis, Crystal Structure and Spectroscopic Investigations of [Y(C6NO2H5)3(H2O)2]n(1.5nZnCl4)•nH2O with Unprecedented Polycationic Chains

Abstract A new heterometallic 4 f -3 d complex [Y(C 6 NO 2 H 5 ) 3 (H 2 O) 2 ] n (1.5 n ZnCl 4 ). n H 2 O( 1 ), was synthesized via a hydrothermal reaction and structurally characterized. Complex 1 crystallized in the monoclinic system with space group P 2 1 / c : a =0.94847(9) nm, b =2.0947(2) nm, c =1.6001(2) nm, β=104.467(2)°, V -3.0781(5) nm 3 , M r =823.04, D c =1.776 g/cm 3 , S =1.009, μ(Mo K α)=3.603 mm −1 , F (000)=1632, R =0.0787, and wR =0.2273. Complex 1 , with four formula units in a cell, was characteristic of a one-dimensional polycationic chain-like structure. Photolumincscent investigation showed that the title complex displayed a strong emission in the blue region, which was attributed to the intraligand π-π * transition of the nicotinic ligands. Optical absorption spectrum of complex 1 revealed the presence of a wide optical bandgap of 4.17 eV.