Bis(η2-ethyl­ene)[aza­nidediylbis(diiso­propyl­phosphine selenide)-κ2 Se,Se′]iridium(III)

In the title compound, [Ir(η2-C2H4)2(C12H28NP2Se2)], the central Ir atom is chelated by the [N(iPr2PSe)2]− ligand via two Se atoms and is coordinated by two η2-ethyl­ene mol­ecules via four C atoms in an octa­hedral coordination geometry

Tetra­ethyl­ammonium trichlorido(η6-p-cymene)ruthenate(II)

In the title salt, [(C2H5)4N][RuCl3(C10H14)], the RuII atom shows an octa­hedral coordination in which the aromatic ring of the p-cymene mol­ecule occupies three coordination positions

Tris(2,2′-bipyridine-κ2 N,N′)cadmium(II) bis­(perchlorate) hemihydrate

The asymmetric unit of the title compound, [Cd(C10H8N2)3](ClO4)2·0.5H2O, consists of one complex [Cd(bpy)3]2+ cation (bpy = 2,2′-bipyridine), two perchlorate anions and one water molecule with half-occupancy. The central cadmium(II) ion is bound to six N atoms from three bpy ligands in a distorted octa­hedral coordination, with Cd—N bond distances ranging from 2.304 (3) to 2.395 (2) Å

Hexa-μ2-bromido-μ4-oxo-tetra­kis[(nicotine)copper(II)]

In the title compound, hexa-μ2-bromido-μ4-oxo-tetra­kis{[3-(1-methyl-2-pyrrolidin­yl)pyridine-κN]copper(II)}, [Cu4Br6O(C10H14N2)4], the four Cu atoms are tetra­hedrally arranged around the O atom at the cluster center. The Cu and coordinated N atoms lie along directions which correspond to four of the eight threefold axial directions of a regular octa­hedron. Each Cu atom lies at the center of a trigonal bipyramid, with the O atom and the pyridine N atom of a nicotine ligand in the axial positions and three Br atoms in the equatorial positions. Average bond distances are: Cu—N = 1.979 (8), Cu—O = 1.931 (6), Cu—Br = 2.514 (14) and Cu⋯Cu = 3.154 (6) ÅÅ. The configuration of the nicotine ligands is that of the trans diastereomer. In addition, the crystal structure contains five intra­molecular C—H⋯Br hydrogen bonds, which determine (or support) the orientation of the nicotine mol­ecules relative to their three equatorial Br atoms. One of the nicotine mol­ecules has two C—H⋯Br contacts, while the other three nicotine mol­ecules show only one C—H⋯Br bond each. Two other inter­molecular C—H⋯Br hydrogen bonds connect the complex mol­ecules, forming ribbons which extend in the b- and c-axis directions

catena-Poly[[diiodidomercury(II)]-μ-nicotine-κ2 N:N′]

The title polymeric complex, [HgI2(C10H14N2)]n, was prepared from a solution of nicotine, mercury(II) iodide and 4-cyano­pyridine in dimethyl­formamide. Each nicotine mol­ecule is bonded to two Hg atoms, one through the pyrrolidine N atom and the other through the pyridine N atom, forming infinite zigzag polymeric chains. The coordin­ation around mercury is completed by two iodide ligands, resulting in a distorted tetra­hedral arrangement

Preparation and Characterization of Mesoporous Zirconia Made by Using a Poly (methyl methacrylate) Template

Superfine powders of poly (methyl methacrylate) (PMMA) have been prepared by means of an emulsion polymerization method. These have been used as templates in the synthesis of tetragonal phase mesoporous zirconia by the sol–gel method, using zirconium oxychloride and oxalic acid as raw materials. The products have been characterized by infrared spectroscopy, X-ray diffraction analysis, transmission electron microscopy, N2adsorption-desorption isotherms, and pore size distribution. The results indicate that the average pore size was found to be 3.7 nm

catena-Poly[[tetra­kis(hexa­methyl­phospho­ramide-κO)bis­(nitrato-κ2 O,O′)lanthanum(III)] [silver(I)-di-μ2-sulfido-tungstate(VI)-di-μ2-sulfido]]

Hexamethyl­phospho­ramide (hmp), tetra­thio­tungstate(VI), silver sulfide and lanthanum(III) nitrate are self-assembled to form discrete cations one-dimensional poylmeric anionic chains [AgWS4]nn − in the title compound, {[La(NO3)2(C6H18N3OP)4][AgWS4]}n. The central La atom in the cation is coordinated by eight O atoms from two nitrate and four hmp ligands. Together with the two nitrate ligands, the cation is monovalent, which leads to the anionic chain having a monovalent repeat unit. The polymeric anionic chain with W⋯Ag⋯W and Ag⋯W⋯Ag angles of 165.94 (3) and 155.894 (14)° presents a distorted linear configuration. Five N atoms, 18 C atoms and their attached H atoms are disordered equally over two positions

4,4′-[(2,7-Dibromo­fluorene-9,9-di­yl)dimethyl­ene]dipyridinium bis­(perchlorate)

In the crystal of the title compound, C25H20Br2N2 2+·2ClO4 −, inter­molecular N—H⋯O and C—H⋯O hydrogen bonds, along with C—H⋯π inter­actions, stabilize the crystal structure

Study of Preparation, Growth Mechanism and Catalytic Performance of Carbon Based Embedded Silver Nano Composite Materials

Novel and stable carbon based embedded silver nano composite materials (Ag/CSs) were successfully prepared by a facile one-pot hydrothermal method with trioctylamine (TOA) as soft template and stabilizer. These as-prepared Ag/CSs exhibit well-defined shape and relatively uniform size with an average diameter of 1.5 μm and uniformly embedded Ag nanoparticles about 5 nm. The proper proportion of glucose, AgNO3 and TOA is the key to the common growth of hydrothermal carbon materials and silver nanoparticles in an embedded way. Besides, the thickness of carbon sphere matrix and the size of Ag particles can be tailored precisely by adjusting the experimental parameters. In order to facilitate comparative analysis, carbon spheres (CSs) without Ag particles embedded were also prepared with glucose under the same hydrothermal reaction conditions. The composition, structure and morphology of the as-prepared Ag/CSs and CSs were confirmed by X-ray powder diffraction (XRD), FT-IR spectroscopy, Raman spectrum, Transmission electron microscopy (TEM) and scanning electron microscopy (SEM). In addition, the possible formation mechanism of the Ag/CSs has been proposed based on experimental evidences. Finally, the as-prepared Ag/CSs and CSs were used as catalysts in the experiments of photocatalytic degradation of methylene MB in water under visible light irradiation and the high efficiency of photocatalytic performance of Ag/CSs has been verified

An epigenome-wide association study identifies multiple DNA methylation markers of exposure to endocrine disruptors

Background: Exposure to environmental endocrine disrupting chemicals (EDCs) may play an important role in the epidemic of metabolic diseases. Epigenetic alterations may functionally link EDCs with gene expression and metabolic traits. Objectives: We aimed to evaluate metabolic-related effects of the exposure to endocrine disruptors including five parabens, three bisphenols, and 13 metabolites of nine phthalates as measured in 24-hour urine on epigenome-wide DNA methylation. Methods: A blood-based epigenome-wide association study was performed in 622 participants from the Lifelines DEEP cohort using Illumina Infinium HumanMethylation450 methylation data and EDC excretions in 24-hour urine. Out of the 21 EDCs, 13 compounds were detected in >75% of the samples and, together with bisphenol F, were included in these analyses. Furthermore, we explored the putative function of identified methylation markers and their correlations with metabolic traits. Results: We found 20 differentially methylated cytosine-phosphate-guanines (CpGs) associated with 10 EDCs at suggestive p-value < 1 × 10−6, of which four, associated with MEHP and MEHHP, were genome-wide significant (Bonferroni-corrected p-value < 1.19 × 10−7). Nine out of 20 CpGs were significantly associated with at least one of the tested metabolic traits, such as fasting glucose, glycated hemoglobin, blood lipids, and/or blood pressure. 18 out of 20 EDC-associated CpGs were annotated to genes functionally related to metabolic syndrome, hypertension, obesity, type 2 diabetes, insulin resistance and glycemic traits. Conclusions: The identified DNA methylation markers for exposure to the most common EDCs provide suggestive mechanism underlying the contributions of EDCs to metabolic health. Follow-up studies are needed to unravel the causality of EDC-induced methylation changes in metabolic alterations