Synthesis, characterization and study on the dissimilar reactivity of a Ni(II)-bis(iminosemiquinone) complex core to ligand-appended hemilabile –CH2OH and –CH2NH2 units

Publication date: 1 March 2020Source: Inorganica Chimica Acta, Volume 502Author(s): Prasenjit Sarkar, Samir Ghorai, Ganesh Chandra Paul, Mahmuda Khannam, Surajit Barman, Chandan MukherjeeAbstractNoninnocent ligand H3LCH2OH reacted with NiCl2·6H2O under aerial atmosphere and provided corresponding complexes 1 {[NiII(HLCH2OH)2]0} and 1a {[NiII(LCHO)2]0} in the presence of Et3N and NaOH, respectively. Ligand H4LCH2NH2 provided complex 2 {[NiII(HL3]0} in the presence of NiCl2·6H2O and Et3N under air. All the complexes were characterized by various spectroscopic and spectrometric techniques, which included FT-IR, mass, UV-vis/NIR, 1H NMR, cyclic voltammetry and single crystal X-ray diffraction methods. Molecular structural analyses on complexes 1 and 1a revealed that both four-coordinate complexes were neutral in charge and consisted of two ligand-centered iminosemiquinone radicals and a Ni(II) ion. While, the hemilabile –CH2OH group remained unaffected and did not make any coordination with the central Ni(II) ion in complex 1, two-electron oxidation of each –CH2OH group to –CHO group was realized in complex 1a. In complex 2, the ligand backbone was an innocent tetradentate salen unit, which was formed by a complete modification of the initial noninnocent ligand H4LCH2NH2. To find out the mechanistic path for the formation of complex 2, ligand H3L1 and H4L2 were also introduced and it was presumed that transimination took place in the ligand backbon...
Source: Inorganica Chimica Acta - Category: Chemistry Source Type: research

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Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Nirala Singh, Udishnu Sanyal, Griffin Ruehl, Kelsey A. Stoerzinger, Oliver Y. Gutiérrez, Donald M. Camaioni, John L. Fulton, Johannes A. Lercher, Charles T. CampbellAbstractThe mechanisms of aqueous-phase thermal catalytic hydrogenation (TCH) and electrocatalytic hydrogenation (ECH) of organic molecules over Pt group metals are not as well-understood as gas-phase thermal catalytic hydrogenation. In gas-phase, the reactions generally occur via a Langmuir-Hinshelwood mechanism with adsorbed hydrogen adding to adsorbed organics. Here, we ...
Source: Journal of Catalysis - Category: Chemistry Source Type: research
As the prevalence of type 1 and type 2 diabetes increases and population-level patterns of alcohol and illicit drug use evolve, clinicians will continue to encounter people with diabetes whose substance use is affecting health outcomes. Substance use contr...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Alcohol and Other Drugs Source Type: news
Contributors : Muralidhara R Maradana ; Brendan J O'Sullivan ; Ranjeny ThomasSeries Type : Expression profiling by high throughput sequencingOrganism : Mus musculusNon-alcoholic fatty liver disease (NAFLD) is a common complication of obesity, where insulin resistance and hepatocyte fat deposition may progress to steatohepatitis (NASH) and fibrosis/ cirrhosis. NASH has no approved treatment. Consequent upon hepatic fat deposition, NF- κB activation in hepatic myeloid cells mediates inflammation and NASH progression. We delivered micro-doses of liposome-encapsulated lipophilic NF-κB inhibitors, curcumin or 1,25-d...
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Expression profiling by high throughput sequencing Mus musculus Source Type: research
Contributors : Muralidhara R Maradana ; Brendan J O'Sullivan ; Ranjeny ThomasSeries Type : Expression profiling by high throughput sequencingOrganism : Mus musculusNon-alcoholic fatty liver disease (NAFLD) is a common complication of obesity, where insulin resistance and hepatocyte fat deposition may progress to steatohepatitis (NASH) and fibrosis/ cirrhosis. NASH has no approved treatment. Consequent upon hepatic fat deposition, NF- κB activation in hepatic myeloid cells mediates inflammation and NASH progression. We delivered micro-doses of liposome-encapsulated lipophilic NF-κB inhibitors, curcumin or 1,25-d...
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Expression profiling by high throughput sequencing Mus musculus Source Type: research
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Source: Substance Abuse - Category: Addiction Authors: Source Type: research
Publication date: Available online 20 January 2020Source: Materials Today: ProceedingsAuthor(s): I.A. Malbakhova, A.I. Titkov, N.F. Uvarov, A.S. UlihinAbstractNanocomposite electrode materials composed of graphite, Ag and AgCl were prepared by impregnation of graphite with a suspension of silver nanoparticles followed by anodizing in hydrochloric acid to obtain a layer of silver chloride on the surface of the nanoparticles. Silver nanoparticles were synthesized by the reduction of silver salts in benzyl alcohol. It was shown that the mass fraction of 1% Ag in the nanocomposite is optimal for creating a uniform coating of c...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: April 2020Source: Materials Science and Engineering: C, Volume 109Author(s): Κarine Modolon Zepon, Morgana Souza Marques, Alana Witt Hansen, Caroline do Amaral Fetzner Pucci, Fernando Dal Pont Morisso, Ana Luiza Ziulkoski, Jose Heriberto Oliveira do Nascimento, Rachel Faverzani Magnago, Luiz Alberto ΚanisAbstractPolymer-based wafers containing gold nanoparticles (AuNP) were prepared using κ-carrageenan (κC), locust bean gum (LBG) and polyvinyl alcohol (PVA) at ratios of 42/22/13% w/w and 35/15/17% w/w. The synthesized AuNPs were evaluated for their particle size and morphology. The...
Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research
ConclusionBoth WHtR and BMI were important predictors of NCD prevalence. These findings can contribute to the validity of the WHtR in clinical application and encourage the use of these anthropometric indices in clinical settings.
Source: Journal of Public Health - Category: Health Management Source Type: research
The objective of this study was to develop a simple method for detecting lipid oxidation through the color change of a composite film. Schiff's reagent which can form color compound with lipid oxidation products—aldehydes was incorporated into polyvinyl alcohol (PVA) to form the composite film. The effects of PVA molecular weight (Mw), Schiff's reagent/PVA ratio and glycerol content on the response of the composite film to aldehyde were investigated. Sunflower seed oil with various extent of oxidation was used to evaluate the effectiveness of the composite film for lipid oxidation detection. The results showed that t...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
CONCLUSIONS: Increased IP is found in 23% of cirrhotic patients. Permeability alterations are significantly more pronounced in patients with advanced LC with the presence of ascites and in those with alcoholic etiology. PMID: 31957845 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
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