Selective gas adsorption and separation in metal-organic frameworks.

Adsorptive separation is very important in industry. Generally, the process uses porous solid materials such as zeolites, activated carbons, or silica gels as adsorbents. With an ever increasing need for a more efficient, energy-saving, and environmentally benign procedure for gas separation, adsorbents with tailored structures and tunable surface properties must be found.

Interconversion between molecular polyhedra and metal-organic frameworks.

The construction of a metal-organic framework (MOF) with a pcu-a topology using a preassembled soluble molecular octahedron has been realized experimentally. The resulting MOF can also be reversibly converted to the molecular octahedron. All such conversions are based on axial-ligand substitution reactions on the molecular octahedron.

Tuning the framework topologies of Co(II)-doped Zn(II)-tetrazole-benzoate coordination polymers by ligand modifications: structures and spectral studies.

In our continuing efforts to explore the effects of ligand modifications on the structures and properties of their metal complexes, we studied the in situ [2 + 3] cycloaddition reactions of benzonitrile, o-phthalodinitrile, 3-cyanobenzoic acid, 4-cyanobenzoic acid with NaN(3) in the presence of Zn(II) and/or Co(II) salts under hydrothermal conditions, and obtained four new Co(II)-doped Zn(II)-tetrazole-benzoate coordination polymers with the formula of [Co(x)Zn(1-x)(L(m))(y)](n) [5-phenyl-1H-tetrazole (HL(1)) for 1, 2-(1H-tetrazol-5-yl)benzoic acid (H(2)L(2)) for 2, 3-(1H-tetrazol-5-yl)benzoic acid (H(2)L(3)) for 3, and 4-(1H-tetrazol-5-yl)benzoic acid (H(2)L(4)) for 4]. The structure of 1 shows a classical diamondoid net, while 2 and 3, take 2D layer structure with (4.6(2))(4.

The first examples of lanthanide selenite-carboxylate compounds: syntheses, crystal structures and properties.

[Ln(8)(SeO(3))(4)(2,6-pdc)(8)(H(2)O)(10)].2H(2)O (Ln = La (1), Nd (2), Eu (3); 2,6-pdcH(2) = pyridine-2,6-dicarboxylic acid) represent the first examples of luminescent lanthanide selenite-carboxylate compounds. The compounds have been hydrothermally synthesized and structurally characterized.

The synthesis of MP-CDCA conjugates and dissolution kinetics of model cholesterol gallstones.

The comb-like copolymers of polycarboxylic acid were synthesized and then reacted with chenodeoxycholic acid (CDCA) to obtain a series of conjugates, MPn-CDCA, where n is the number of the groups of oxyethylene in each graft chain. This was confirmed by infrared spectroscopy and thin-layer chromatography. We investigated the effects of dissolving model cholesterol gallstones with the MPn-CDCA conjugates in phosphate-buffered saline at pH 7.

[Improvement effects of Jincao tablet on immune function of model of hysteromyoma in rats].

Objective: To investigate the improvement effects of Jincao tablet on immune function of the model of hysteromyoma in rat and the relationship between the model and pathogenesis.

Method: Rats were randomly divided into 6 groups: normal group, model group, treatment groups including low,middle and high dosage groups of Jincao tablet and Guizhi Fuling pill. Rats were injected respectively with diethyl stilbestrol and progesterone.

d(10) Metal complexes assembled from isomeric benzenedicarboxylates and 3-(2-pyridyl)pyrazole showing 1D chain structures: syntheses, structures and luminescent properties.

Seven new d10 metal coordination polymers with isomeric benzenedicarboxylates and 3-(2-pyridyl)pyrazole ligands, [Zn2 L2(1,2-BDC)(H2O)]n ( 1), {[Cd2(H L)2(1,2-BDC)2] x H2O}n ( 2), [Cd(H L)(1,2-BDC)(H2O)]n (3), [Zn(H L)(1,3-BDC)(H2O) x 3H2O]n ( 4), [Cd2 L2(1,3-BDC)(H2O)]n (5), [Zn(H L)2(1,4-BDC)]n ( 6) and [Cd(H L)2(1,4-BDC)]n (7) (BDC = benzenedicarboxylate, H L = 3-(2-pyridyl)pyrazole), have been synthesized and structurally characterized by elemental analysis, IR and X-ray diffraction. Single-crystal X-ray analyses reveal that each complex takes a different one-dimensional (1D) chain structure. In 1-7, the BDCs act as bridging ligands, exhibiting rich coordination modes to link metal ions.

Selective gas adsorption and unique structural topology of a highly stable guest-free zeolite-type MOF material with N-rich chiral open channels.

A new multifunctional di-topic tetrazolate-based ligand, 2,3-di-1H-tetrazol-5-ylpyrazine (H(2)dtp) has been designed and synthesized. The solvothermal reaction of this ligand with ZnCl(2) gave a robust guest-free three-dimensional zeolite-like chiral metal-organic framework (MOF) complex, [Zn(dtp)], which crystallized in chiral space group P6(1) and possessed chiral open channels with nitrogen-rich walls and the diameter of approximately 4.1 A.

[Studies on protective effects of Niuhuang Shangqing pills on cerebral ischemia].

Objective: To discuss the protective effect of Niuhuang Shangqing pills (NSP) on the experimental cerebral ischemia and the influence of blood rheology in animals.

Method: Using the middle cerebral artery occlusion (MCAO), bilateral common carotid artery ligation and lipopolysaccharide (LPS) in combination with carrogeenin (Ca)-induced stagnation of blood model rats, we investigated the influence of NSP on the physical sign indexes, brain infarct size and the water content, the content of lactate(LD), glutathione peroxidase (GPx), catalase (CAT), malondialdehyde (MDA) and the blood rheology.

Result: The 3.

An azido-Cu(II)-triazolate complex with utp-type topological network, showing spin-canted antiferromagnetism.

An azido-metal-1,2,4-triazolate coordination polymer, [Cu(trz)(N(3))](n) (trz = 1,2,4-triazolate) was synthesized using hydrothermal methods; the complex has a rare three-dimensional non-interpenetrated utp or (10,3)-d topological network structure and exhibits spin-canted antiferromagnetism at low temperature.

Magnetic canting or not? Two isomorphous 3D CoII and NiII coordination polymers with the rare non-interpenetrated (10,3)-d topological network, showing spin-canted antiferromagnetism only in the CoII system.

The in situ solvothermal reaction of 3,4-dicyano-1,2,5-thiadiazole with MCl(2) (M = Co, Ni) and NaOH afforded two isomorphous complexes, [M2(L)2(H(2)O)2]n (L = 2,1,3-thiadiazole-4,5-dicarboxylate), which exhibit a rare non-interpenetrated (10,3)-d (utp) network topology and interesting magnetic behaviors: spin-canted antiferromagnetism for the Co(II) complex, but simple antiferromagnetic coupling for the Ni(II).

Study on the blood-borne virus co-infection and T lymphocyte subset among intravenous drug users.

Aim: To investigate the features of various blood-borne virus infections and co-infection in intravenous drug users (IDUs), and to examine the correlation of T lymphocyte subsets with virus co-infection.

Methods: Four hundred and six IDUs without any clinical manifestation of hepatitis and 102 healthy persons were enrolled in this study. HBV-DNA and HCV-RNA were detected by fluorescence quantitative PCR.

Expression of Cu, Zn-superoxide dismutase gene from Saccharomyces cerevisiae in Pichia pastoris and its resistance to oxidative stress.

The gene for the Cu, Zn-superoxide dismutase (SOD) from the yeast Saccharomyces cerevisiae was cloned, characterized, and overexpressed in the methylotrophic Pichia pastoris. The sod gene sequence obtained is 465 bp and encodes 154 amino acid residues. The sod gene sequence was cloned into the pPIC9K vector, yielding pAB22.

A pcu-type metal-organic framework with spindle [Zn7(OH)8]6+ cluster as secondary building units.

The in situ solvothermal reaction of 9,10-dicyanoanthracene and ZnCl(2)/NaN(3) gave the complex, {[Zn(7)(OH)(8)(DTA)(3)].H(2)O}(n) () (DTA(2-) = 9,10-ditetrazolateanthracene), which presents a pcu-type topological framework formed by DTA(2-) bridging unprecedented heptanuclear spindle [Zn(7)(OH)(8)](6+) clusters as SBUs, and exhibits strong luminescent emission with long lifetime.

Poly[bis-(μ(2)-5-n-butyl-tetra-zolato-κN:N)zinc(II)].

In the title complex, [Zn(C(5)H(9)N(4))(2)](n), the Zn(II) center is coordinated by four N atoms of different tetra-zolate ligands with a slightly distorted tetra-hedral geometry [Zn-N distances and N-Zn-N angles are in the ranges 1.991 (2)-2.007 (2) Å and 104.

Novel heterometallic 3d-4f metal-azido complex of mixed ligands with unprecedented structure type: synthesis, structure, and magnetic properties.

A novel heterometallic 3d-4f metal-azido complex of mixed ligands, showing unprecedented structure type and interesting magnetic properties, has been hydrothermally synthesized and characterized.

[Determination of acetylharpagide in Ajuga decumbens by HPLC].

Objective: To establish a method of the quantitative determination of acetylharpagide in Ajuga decumbens.

Method: The chromatographic conditions were as follows: a Phenomenex Luna C18 column was used, the mobile phase was composed of acetontrile-water (15:85), the flow rate was 1.0 mL x min(-1) and the UV absorbance detection was set at 197 nm.

[Study on the metabolism of the precipitation of Xiexin decoction in rats I].

Objective: To study the process in vivo of the components in the precipitation of Xiexin decoction.

Method: The components in the rats' urine samples after oral administration of baicalin, single herb decoction of Radix Scutellariae or the precipitation of Xiexin decoction were analyzed by LC-MS-MS method; and the absorption of baicalin in different samples were calculated by intestinal in situ loop method.

Result: The urinary excretion amounts of baicalin in three samples were not obviously different, whereas the time reach elimination-peak of baicalin in them had significant difference.

Syntheses, crystal structures, and magneto-structural correlations of novel Cu(II) complexes containing a planar [Cu(mu-L1)]2 (HL1 = 3-(2-pyridyl)pyrazole) unit: from dinuclear to tetranuclear and then to one-dimensional compounds.

Seven new Cu(II) complexes based on a binuclear planar unit [Cu(mu-L(1))](2), [[Cu(mu-L(1))(NO(3))(H(2)O)](2) (1), [Cu(mu-L(1))(HL(1))(ClO(4))](2) (2), [Cu(4)(mu-L(1))(6)(NO(3))(2)] (3), [Cu(4)(mu-L(1))(6)(L(1))(2)] (4), [Cu(4)(mu-L(1))(6)(mu-L(2))](n) (5), [Cu(4)(mu-L(1))(6)(mu-L(3))](n) (6), [[Cu(4)(mu-L(1))(4)(mu-L(4))(2)](H(2)O)(3)](n) (7) (HL(1) = 3-(2-pyridyl)pyrazole, L(2) = 1,8-naphthalenedicarboxylate, L(3) = terephthalate, L(4) = 2,6-pyridinedicarboxylate)}, have been synthesized and characterized by elemental analysis, IR, and X-ray diffraction. In 1 and 2, the Cu(II) centers are linked by deprotonated pyrazolyl groups to form dinuclear structures. 3 and 4 have similar gridlike tetranuclear structures in which two additional deprotonated L(1) ligands bridge two [Cu(mu-L(1))](2) units perpendicularly.

Synthesis, structures, and magnetic properties of the copper(II), cobalt(II), and manganese(II) complexes with 9-acridinecarboxylate and 4-quinolinecarboxylate ligands.

To explore the relationships between the structures of ligands and their complexes, we have synthesized and characterized a series of metal complexes with two structurally related ligands, 9-acridinecarboxylic acid (HL(1)) and 4-quinolinecarboxylate acid (HL(2)), [Cu(2)(mu(2)-OMe)(2)(L(1))(2)(H(2)O)(0.69)](n) 1, [Cu(2)(L(1))(4)(CH(3)OH)(2)] 2, [Cu(3)(L(1))(6)(CH(3)OH)(6)].3H(2)O 3, [Mn(3)(L(1))(6)(CH(3)OH)(6)].

Novel 3-D framework nickel(II) complex with azide, nicotinic acid, and nicotinate(1-) as coligands: hydrothermal synthesis, structure, and magnetic properties.

The hydrothermal reaction of Ni(NO3)2, NaN3, and nicotinic acid (Hnic) yielded a 3-D supramolecular framework complex, [Ni(1.5)(N3)(nic)2(Hnic)]n (1) with unusual magnetic properties. In 1, Hnic and nic-1 coexist and show different coordination modes (mu2-Hnic-N,O, mu2-nic-N,O, and mu3-nic-N,O,O bridging NiII ions), and azide groups adopt mu-1,1 (EO) bridging mode linking NiII ions with an unusual Ni-N-Ni angle.

[Expression of the infectious bursal disease virus polyprotein in Vero cells using attenuated Salmonella typhimurium as transgenic carrier].

To examine if polyprotein gene (VP2/VP4/VP3) of Infectious Bursal Disease Virus (IBDV) could be delivered into mammalian cells and expressed using attenuated Salmonella typhimurium as vector. The IBDV polyprotein gene was amplified by RT-PCR and inserted in to pCI, an eukaryotic expression plasmid. The resulting recombinant pCI-VP2/VP4/VP3 was transformed by electroporation into attenuated Salmonella typhimurium strain ZJ111 (dam- and phoP-), which was then use to transfect the Vero cells.

Ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-methyl-1H-pyrazole-4-carboxylate and ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-(2-nitrophenylsulfonyl)-1H-pyrazole-4-carboxylate.

The molecular structures of ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-methyl-1H-pyrazole-4-carboxylate, C13H18N6O2, (I), and ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-(2-nitrophenylsulfonyl)-1H-pyrazole-4-carboxylate, C18H19N7O6S, (II), have been determined. There are two intramolecular N-H..

Novel dithioether-silver(I) coordination architectures: structural diversities by varying the spacers and terminal groups of ligands.

An investigation into the dependence of the framework formation of coordination architectures on ligand spacers and terminal groups was reported based on the self-assembly of AgClO4 and eight structurally related flexible dithioether ligands, RS(CH2)nSR (Lan, R = ethyl group; Lbn, R = benzyl group, n= 1-4). Eight novel metal-organic architectures, [Ag(La1)3/2ClO4]n (1a), [Ag2(La2)2(ClO4)2]2 (2a), [AgLa3ClO4]n (3a), {[Ag(La4)2]ClO4}n (4a), [AgLb1ClO4]2 (1b), [Ag(Lb2)2]ClO4 (2b), {[Ag(Lb3)3/2(ClO4)1/2](ClO4)1/2}n (3b) and [Ag(Lb4)3/2ClO4]n(4b), were synthesized and structurally characterized by X-ray crystallography. Structure diversities were observed for these complexes: 1a forms a 2-D (6,3) net, while 2a is a discrete tetranuclear complex, in which the AgI ion adopts linear and tetrahedral coordination modes, and the S donors in each ligand show monodentate terminal and mu2-S bridging coordination fashions; 3a has a chiral helical chain structure in which two homo-chiral right-handed single helical chains (Ag-La3-)n are bound together through mu2-S donors, and simultaneously gives rise to left-handed helical entity (Ag-S-)n.