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https://www.readbyqxmd.com/read/28938452/dose-specific-effects-of-di-isononyl-phthalate-on-the-endocannabinoid-system-and-on-liver-of-female-zebrafish
#1
Isabel Forner-Piquer, Francesca Maradonna, Giorgia Gioacchini, Stefania Santangeli, Marco Allarà, Fabiana Piscitelli, Hamid R Habibi, Vincenzo Di Marzo, Oliana Carnevali
Phthalates, used as plasticizers, have become a ubiquitous contaminant and have been reported for their potential to induce toxicity in living organisms. Among them, the Di-isononyl phthalate (DiNP) has been recently used to replace the bis(2-ethylhexyl) phthalate (DEHP). Nowadays, there is evidence that DiNP is an Endocrine Disrupting Chemical (EDC), however little is known about its effects on the Endocannabinoid System (ECS) and lipid metabolism. Hence, the aim of our study was to investigate the effects of DiNP on the ECS in zebrafish liver and brain and on hepatic lipid storage...
August 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28937745/mononuclear-fe-ii-complexes-based-on-the-methylpyrazinyl-diamine-ligand-chemical-thermo-and-photocontrol-of-their-magnetic-switchability
#2
Xue Liu, Jian Zhou, Xin Bao, Zheng Yan, Guo Peng, Mathieu Rouzières, Corine Mathonière, Jun-Liang Liu, Rodolphe Clérac
Two new mononuclear Fe(II) complexes, [Fe((2Me)Lpz)(NCX)2] (L = N,N'-dimethyl-N,N'-bis((pyrazin-2-yl)methyl)-1,2-ethanediamine and X = S (1), BH3 (2)), have been synthesized and characterized by single-crystal X-ray diffraction, magnetic, optical reflectivity, and photomagnetic measurements. They have similar FeN6 coordination environments offered by the tetradentate ligand with a cis-α conformation and two NCX(-) coligands in cis positions. However, 1 and 2 have different molecular arrangements and crystal packings, and are isolated in orthorhombic Pbnb and monoclinic C2/c space groups, respectively...
September 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28937744/methane-c-h-activation-via-3d-metal-methoxide-complexes-with-potentially-redox-noninnocent-pincer-ligands-a-density-functional-theory-study
#3
Ahmad Najafian, Thomas R Cundari
This paper reports a density functional theory study of 3d transition-metal methoxide complexes with potentially redox-noninnocent pincer supporting ligands for methane C-H bond activation to form methanol (LnM-OMe + CH4 → LnM-Me + CH3OH). The three types of tridentate pincer ligands [terpyridine (NNN), bis(2-pyridyl)phenyl-C,N,N' (NCN), and 2,6-bis(2-phenyl)pyridine-N,C,C' (CNC)] and different first-row transition metals (M = Ti, V, Cr, Mn, Fe, Co, Ni, and Cu) are used to elucidate the reaction mechanism as well as the effect of the metal identity on the thermodynamics and kinetics of a methane activation reaction...
September 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28937175/chiral-six-coordinate-dy-iii-and-tb-iii-complexes-of-an-achiral-ligand-structure-fluorescence-and-magnetism
#4
Mei-Jiao Liu, Juan Yuan, Yi-Quan Zhang, Hao-Ling Sun, Cai-Ming Liu, Hui-Zhong Kou
Two new chiral six-coordinate lanthanide complexes (1 for Dy and 2 for Tb) have been synthesized using the achiral flexible ligand H2L (2,2'-[1,2-ethanediylbis[(methylimino)methylene]]bis[4,5-dimethylphenol]). Both complexes crystallize in the chiral P1 group space, and the enantiomers [Zn(L)Cl]3Dy·MeOH·0.5H2O (Λ-1), [Zn(L)Cl]3Dy·1.5H2O (Δ-1), [Zn(L)Cl]3Tb·1.5H2O (Λ-2) and [Zn(L)Cl]3Tb·H2O (Δ-2) are isolated in the reaction. Three [Zn(L)Cl](-) anions coordinate to the central lanthanide ion using two phenoxo oxygen atoms of L(2-), and the lanthanide ion has the coordination geometry of D3...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28937174/tantallacyclopentadiene-as-a-unique-metal-containing-diene-ligand-coordinated-to-nickel-for-preparing-tantalum-nickel-heterobimetallic-complexes
#5
Payel Laskar, Keishi Yamamoto, Anga Srinivas, Alexis Mifleur, Haruki Nagae, Hayato Tsurugi, Kazushi Mashima
A mononuclear tantallacyclopentadiene complex, TaCl3(C4H2tBu2) (3), serves as a unique ligand to nickel: the addition of Ni(COD)2 to 3 selectively afforded heterobimetallic Ta-Ni complex 4. The cyclooctadiene ligand bound to the nickel center in complex 4 was readily substituted by monodentate and bidentate phosphine ligands, such as dimethylphenylphosphine, 1,2-bis(diphenylphosphino)ethane, and 1,2-bis(diethylphosphino)ethane, to give the corresponding phosphine complexes 5, 6a, and 6b. We also examined a ligand substitution reaction with 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) to produce the corresponding Ta-Ni complex 7...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28936770/a-one-pot-synthesis-of-bis-phenylimino-thiazolidines-from-ketene-n-s-acetals-and-formula-see-text-formula-see-text-diphenyloxalimidoyl-dichloride
#6
Issa Yavari, Nooshin Zahedi, Leila Baoosi, Stavroula Skoulika
A synthesis of functionalized 4,5-bis(phenylimino)-1,3-thiazolidine-2-ylidenes via a simple reaction between ketene [Formula: see text]-acetals (derived from isothiocyanates and acetonitrile derivatives) with N,[Formula: see text]-diphenyloxalimidoyl dichloride in the presence of KOH in DMF is described. When CS[Formula: see text] was used as the heterocumulene component, the reaction led to the formation of 4,5-bis(phenylimino)-1,3-dithiolan-2-ylidene derivatives, in moderate to good yields.
September 21, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/28936497/the-au-111-il-interfacial-nanostructure-in-the-presence-of-precursors-and-its-influence-on-the-electrodeposition-process
#7
Natalia Borisenko, Abhishek Lahiri, Giridhar Pulletikurthi, Tong Cui, Timo Carstens, Janine Zahlbach, Rob Atkin, Frank Endres
Ionic liquids have attracted significant interest as electrolytes for the electrodeposition of metals and semiconductors, but the details of the deposition processes are not yet well understood. In this paper, we give an overview of how the addition of various precursors (TaF5, SiCl4, and GaCl3) affects the solid/IL interfacial structure. In situ Atomic Force Microscopy (AFM) and vibrational spectroscopy have been employed to study the changes of the Au(111)/IL interface and in the electrolytes, respectively...
September 22, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28935856/sequence-controlled-supramolecular-terpolymerization-directed-by-specific-molecular-recognitions
#8
Takehiro Hirao, Hiroaki Kudo, Tomoko Amimoto, Takeharu Haino
Nature precisely manipulates primary monomer sequences in biopolymers. In synthetic polymer sequences, this precision has been limited because of the lack of polymerization techniques for conventional polymer synthesis. Engineering the primary monomer sequence of a polymer main chain represents a considerable challenge in polymer science. Here, we report the development of sequence-controlled supramolecular terpolymerization via a self-sorting behavior among three sets of monomers possessing mismatched host-guest pairs...
September 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28935606/calcimycin-mediates-mycobacterial-killing-by-inducing-intracellular-calcium-regulated-autophagy-in-a-p2rx7-dependent-manner
#9
Shradha Mawatwal, Assirbad Behura, Abhirupa Ghosh, Saqib Kidwai, Abtar Mishra, Amar Deep, Sakshi Agarwal, Sudipto Saha, Ramandeep Singh, Rohan Dhiman
Phenotypic screening led to the identification of calcimycin as a potent inhibitor of Mycobacterium bovis BCG (M. bovis BCG) growth in vitro and in THP-1 cells. In the present study, we aim to decipher the mechanism of antimycobacterial activity of calcimycin. We noticed that treatment with calcimycin led to up-regulation of different autophagy markers like Beclin-1, autophagy-related gene (Atg) 7, Atg 3 and enhanced microtubule-associated protein 1A/1B-light chain 3-I (LC3-I) to LC3-II conversion in macrophages...
September 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28934852/stereoselective-tandem-bis-electrophile-couplings-of-diborylmethane
#10
Stephanie A Murray, Michael Z Liang, Simon J Meek
A copper-catalyzed three-component linchpin coupling method for the stereoselective union of readily available epoxides and allyl electrophiles is disclosed. Transformations employ [B(pin)]2-methane as a conjunctive reagent, resulting in the formation of two C-C bonds at a single carbon center bearing a C(sp3) organoboron functional group. Products are obtained in 42-99% yield, and up to >20:1 dr. The utility of the approach is highlighted by stereospecific transformations entailing allylation, tandem cross coupling, and application to the synthesis 1,3-polyol motifs...
September 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28934666/behavioral-approach-and-orbitofrontal-cortical-activity-during-decision-making-in-substance-dependence
#11
Dorothy J Yamamoto, Marie T Banich, Michael F Regner, Joseph T Sakai, Jody Tanabe
Behavioral approach, defined as behavior directed toward a reward or novel stimulus, when elevated, may increase one's vulnerability to substance use disorder. Behavioral approach has been associated with relatively greater left compared to right frontal activity; behavioral inhibition may be associated with relatively greater right compared to left frontal brain activity. We hypothesized that substance dependent individuals (SDI) would have higher behavioral approach than controls and greater prefrontal cortical activity during decision-making involving reward...
September 14, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28934346/antibacterial-effects-of-carbon-dots-in-combination-with-other-antimicrobial-reagents
#12
Xiuli Dong, Mohamad Al Awak, Nicholas Tomlinson, Yongan Tang, Ya-Ping Sun, Liju Yang
This study was designed to investigate the antimicrobial effects of CDots in combination with other antimicrobial reagents, including H2O2, Na2CO3, and AcOH (acetic acid). CDots were synthesized and passivated with 2,2'-(ethylenedioxy)bis(ethylamine) (EDA). The minimal inhibitory concentration (MIC) of CDots was 64 μg/mL on both Gram negative bacteria E.coli cells and Gram positive bacteria Bacillus subtilis cells. When CDots were combined with H2O2, antibacterial synergistic effects were observed based on the fractional inhibitory concentration (FIC) index, and further confirmed by an isobologram analysis and viable cell number counting methods...
2017: PloS One
https://www.readbyqxmd.com/read/28933864/cyanide-ligand-assembly-by-carbon-atom-transfer-to-an-iron-nitride
#13
Jorge L Martinez, Hsiu-Jung Lin, Wei-Tsung Lee, Maren Pink, Chun-Hsing Chen, Xinfeng Gao, Diane A Dickie, Jeremy M Smith
The new iron(IV) nitride complex PhB((i)Pr2Im)3Fe≡N reacts with two equivalents of bis(diisopropylamino)cyclopropenylidene (BAC) to provide PhB((i)Pr2Im)3Fe(CN)(N2)(BAC). This unusual example of a four-electron reaction involves carbon atom transfer from BAC to create a cyanide ligand along with the alkyne (i)Pr2N-C≡C-N(i)Pr2. The iron complex is in equilibrium with an N2-free species. Further reaction with CO leads to formation of a CO analogue, which can be independently prepared using NaCN as the cyanide source, while reaction with B(C6F5)3 provides the cyanoborane derivative...
September 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28933856/understanding-the-coordination-modes-of-cu-acac-2-imidazole-n-1-2-adducts-by-epr-endor-hyscore-and-dft-analysis
#14
Nadine Ritterskamp, Katherine Sharples, Emma Richards, Andrea Folli, Mario Chiesa, James A Platts, Damien M Murphy
The interaction of imidazole with a [Cu(acac)2] complex was studied using electron paramagnetic resonance (EPR), electron nuclear double resonance (ENDOR), hyperfine sublevel correlation spectroscopy (HYSCORE), and density functional theory (DFT). At low Im ratios (Cu:Im 1:10), a 5-coordinate [Cu(acac)2Imn=1] monoadduct is formed in frozen solution with the spin Hamiltonian parameters g1 = 2.063, g2 = 2.063, g3 = 2.307, A1 = 26, A2 = 15, and A3 = 472 MHz with Im coordinating along the axial direction. At higher Im concentrations (Cu:Im 1:50), a 6-coordinate [Cu(acac)2Imn=2] bis-adduct is formed with the spin Hamiltonian parameters g1 = 2...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933838/gold-iii-nhc-complexes-for-catalyzing-dihydroalkoxylation-and-hydroamination-reactions
#15
Ashwin G Nair, Roy T McBurney, Mark R D Gatus, Samantha C Binding, Barbara A Messerle
A gold(III) complex of an N-heterocyclic carbene based hemilabile ligand with two pendant pyrazole arms (1,3-bis((1H-pyrazol-3-yl)methyl)-2,3-dihydro-1H-imidazole, LH) was synthesized. Complex [LAu(III)Cl3] is an excellent catalyst for promoting dihydroalkoxylation at room temperature, even catalyzing this reaction at 0 °C. [LAu(III)Cl3] is one of the most efficient catalysts reported to date for the spirocyclization of alkynyl diols. Furthermore, [LAu(III)Cl3] catalyzed intra- and intermolecular hydroamination reactions, achieving good to excellent conversions...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933830/immobilized-cobalt-bis-benzenedithiolate-complexes-exceptionally-active-heterogeneous-electrocatalysts-for-dihydrogen-production-from-mildly-acidic-aqueous-solutions
#16
Shawn C Eady, Molly M MacInnes, Nicolai Lehnert
A series of cobalt bis(benzenedithiolate) complexes with varying benzenedithiolate (general abbreviation: bdt(2-)) ring substitutions (S2C6X4(2-)) were prepared and adsorbed on inexpensive electrodes composed of (a) reduced graphene oxide (RGO) electrodeposited on fluorine-doped tin oxide (FTO) and (b) highly ordered pyrolytic graphite (HOPG). The catalyst-adsorbed electrodes are characterized by X-ray photoelectron spectroscopy. Catalyst loading across the ligand series improved notably with increasing halide substitution [from 2...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933826/a-modern-twist-to-a-classic-synthetic-route-ph3bi-based-redox-transmetalation-protolysis-rtp-for-the-preparation-of-barium-metalorganic-species
#17
Yuriko Takahashi, Anna O'Brien, Glen B Deacon, Philip C Andrews, Melanie Wolf, Ana Torvisco, Miriam M Gillett-Kunnath, Karin Ruhlandt-Senge
This paper reports advances in redox transmetalation/protolysis (RTP) utilizing the readily available Ph3Bi for the synthesis of a series of barium metal-organic species. On the basis of easily available starting materials, an easy one-pot procedure, and workup, we have obtained BaL2 compounds (L = bis(trimethylsilyl)amide, phenyl(trimethylsilyl)amide, pentamethylcyclopentadienide, fluorenide, 2,6-di-isopropylphenolate, and 3,5-diphenylpyrazolate) quantitatively by sonication of an excess of barium metal with triphenylbismuth and HL in perdeuterotetrahydrofuran, as established by NMR measurements...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933539/a-3d-coordination-network-built-from-cu-ii-4cl3-h2o-2-linear-clusters-and-tetrapyridyl-tetrahedral-silane-ligands-reversible-iodine-uptake-and-friedel-crafts-alkylation-reactions
#18
Mahesh S Deshmukh, Atul Chaudhary, Pavel N Zolotarev, Ramamoorthy Boomishankar
A novel three-dimensional coordination network 1 in a new 4,5,6-connected topology (4,5,6T115) built from linear Cu(II)4Cl3(H2O)2 clusters and tetrahedral tetrakis(3-pyridyl)vinylsilane ligands is reported. Utilizing a similar tetrahedral ligand, tetrakis(3-pyridyl)ethylsilane, a different framework 2 having Cu(II)2Cl(H2O)2 clusters is obtained in tcs topology. The activated sample of 1 shows an excellent and reversible uptake of I2 in solid as well as in solution phases owing to the presence of uncoordinated chloride ions and electron rich vinylic groups in it...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933538/bulky-%C3%AE-diketones-enabling-new-lewis-acidic-ligand-platforms
#19
Eser S Akturk, Steven J Scappaticci, Rachel N Seals, Michael P Marshak
The synthesis of a sterically encumbered β-diketone ligand ((Ar)acac) substituted with 2,6-(2,4,6-Me3C6H2)2C6H3 is described. Coordination complexes of the type M((Ar)acac)2Cl(solv) (M = Ti, V, Cr; solv = THF, CH3CN) were prepared by the reaction of (Ar)acac with MCl3 (M = V, Cr) or with TiCl4 to generate Ti((Ar)acac)2Cl2, followed by reduction. These complexes show a trend of alternating the cis/trans geometric preference with increasing d(n) electron count (n = 0, 1, 2, 3), which is rationalized in part by the unusual ability of β-diketonates to behave as either a weak π donor or a π acceptor in the cis and trans geometries, respectively...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933473/effects-of-the-ether-oxygen-atom-in-alkyl-side-chains-on-the-physical-properties-of-piperidinium-ionic-liquids
#20
T Nokami, T Yamashita, T Komura, N Handa, M Shimizu, K Yamaguchi, Y Domi, H Usui, H Sakaguchi, T Itoh
Various types of piperidinium ionic liquids (ILs) equipped with an oxygen atom-containing alkyl side chain on the positively charged nitrogen atom were systematically synthesized and their physical properties investigated. The thermal stability, viscosity, electrochemical window, and ion conductivity were influenced significantly by changing the position of the oxygen atom in the alkyl chain. Although the lowest viscosity was recorded for 1-((2-methoxyethoxy)methyl)-1-methylpiperidin-1-ium bis(trifluoromethylsulfonyl)amide ([PP1MEM][Tf2N]), 1-methyl-1-(2-propoxyethyl)piperidin-1-ium bis(trifluoromethylsulfonyl)amide ([PP1PE][Tf2N]) can be recommended as the best IL as an electrolyte due to its low viscosity and high thermal and electrochemical stability among the seven ILs tested...
September 21, 2017: Faraday Discussions
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