Water soluble new bimetallic catalyst [CuZn(bz)3(bpy)2]PF6 in hydrogen peroxide mediated oxidation of alcohols to aldehydes/ketones and C-N functional groups

2018 ◽  
Vol 878 ◽  
pp. 48-59 ◽  
Author(s):  
Ibanphylla Syiemlieh ◽  
Mrityunjaya Asthana ◽  
Sharad K. Asthana ◽  
Sunshine D. Kurbah ◽  
Angira Koch ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Functional Groups ◽  
Bimetallic Catalyst ◽  
Water Soluble ◽  
Oxidation Of Alcohols ◽  
Mediated Oxidation

scholarly journals Structure and properties of tempo-oxidized cotton fibers

2012 ◽  
Vol 18 (3) ◽  
pp. 473-481 ◽  
Author(s):  
Jovana Milanovic ◽  
Mirjana Kostic ◽  
Petar Skundric
Keyword(s):  
Mechanical Properties ◽  
Functional Groups ◽  
Nitroxyl Radical ◽  
Crystallinity Index ◽  
Cellulose Fibers ◽  
Water Soluble ◽  
Carboxyl Groups ◽  
Cotton Fibers ◽  
Structure And Properties ◽  
Mediated Oxidation

In this paper, the influence of the catalytic oxidation using water soluble and stable nitroxyl radical 2,2?,6,6?-tetramethylpiperidine-1-oxyl (TEMPO) on structure and properties of cotton fibers was studied. In particular, the selective TEMPO-mediated oxidation has become very interesting way for introduction of functional groups into cellulose fibers with the aim to obtain oxycellulose fibers with specific properties. Unmodified and modified fibers were characterized in terms of weight loss values, introduced functional groups and crystallinity index. Also, oxidized fibers were characterized in terms of the sorption, morphological, and physico-mechanical properties. The TEMPO-oxidized cotton fibers show a minimum increase of fineness (from 1.32 to 1.28 dtex) and increase of crystallinity index (up to 91.9%), while the tensile strength of fibers decreases (up to 10.82 cN/tex). By the TEMPO-mediated oxidation of cotton fibers significant amount of carboxyl groups (up to 0.795 mmol/g cell) can be introduced into cellulose fibers. Introduced hydrophilic carboxyl groups increases the sorption properties of oxidized fibers, that can be used directly or for further chemical modification.

Neurotoxicity and Neuroprotective Effects of Polyimides (PI) and Polyphenylenevinylene (PPV) against Hydrogen Peroxide (H2O2)

2011 ◽  
Vol 8 (2) ◽  
pp. 33
Author(s):  
Norfaezah Mazalan ◽  
Mazatulikhma Mat Zain ◽  
Nor Saliyana Jumali ◽  
Norhanim Mohalid ◽  
Zurina Shaameri ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Drug Delivery Systems ◽  
Neuronal Cells ◽  
Water Soluble ◽  
Brain Delivery ◽  
Specific Therapy ◽  
Neuroprotective Effects ◽  
Water Soluble Polymer ◽  
Site Specific ◽  
Novel Drugs

Recently, research and development in the field of drug delivery systems (DDS) facilitating site-specific therapy has reached significant progression. DDS based on polymer micelles, coated micro- and nanoparticles, and various prodrug systems including water-soluble polymer have been prepared and extensively studied as novel drugs designed for cancer chemotherapy and brain delivery. Since polymers are going to be used in human, this study has the interest of testing two types of polymer, polyimides (PI) and polyphenylenevinylene (PPV) on neuronal cells. The objective of this study was to determine the possible neurotoxicity and potential neuroprotective effects of PI and PPV towards SH-SY5Y neuronal cells challenged by hydrogen peroxide (H2O2) as an oxidant. Cells were pretreated with either PI or PPV for 1 hour followed by incubation for 24 hour with 100 µM of H2O2. MTS assay was used to assess cell viability. Results show that PI and PPV are not harmful within the concentration up to 10 µM and 100 µM, respectively. However, PI and PPV do not protect neuronal cells against toxicity induced by H2O2 or further up the cell death.

scholarly journals RuIII(edta) mediated oxidation of azide in the presence of hydrogen peroxide. Azide versus peroxide activation

2014 ◽  
Vol 43 (8) ◽  
pp. 3087-3094 ◽  
Author(s):  
Debabrata Chatterjee ◽  
Alicja Franke ◽  
Maria Oszajca ◽  
Rudi van Eldik
Keyword(s):  
Hydrogen Peroxide ◽  
Peroxide Activation ◽  
Mediated Oxidation

Decoloration of Azo Dyes by Hydrogen Peroxide Catalyzed by Water-Soluble Manganese Porphyrins

1999 ◽  
Vol 69 (12) ◽  
pp. 956-960 ◽  
Author(s):  
J. Tokuda ◽  
R. Ohura ◽  
T. Iwasaki ◽  
Y. Takeuchi ◽  
A. Kashiwada ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Azo Dyes ◽  
Water Soluble ◽  
Manganese Porphyrins
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