Dinuclear Metal Complex-Mediated Formation of CO2-Based Polycarbonates

2015 ◽  
pp. 101-141 ◽  
Author(s):  
Charles Romain ◽  
Arnaud Thevenon ◽  
Prabhjot K. Saini ◽  
Charlotte K. Williams
Keyword(s):  
Metal Complex

Metal-Complex Ions in Hydrocarbons

1957 ◽  
Vol 12 (1_2) ◽  
pp. 96-109 ◽  
Author(s):  
Andrew Gemant
Keyword(s):  
Metal Complex ◽  
Complex Ions

Preparation and Gas Sensitivity of Crown Ether Metal Complex Film Gas Sensor

2020 ◽  
Vol 2 (1) ◽  
pp. 1-12
Author(s):  
Gulgina Mamtimin ◽  
Halisa Arkin ◽  
Patima Nizamidin ◽  
Erkin Tursun ◽  
Abliz Yimit
Keyword(s):  
Crown Ether ◽  
Metal Complex ◽  
Gas Sensor ◽  
Gas Sensitivity ◽  
Complex Film

Conducting Cation-Radical Salts Bedt-TTF with Metal Complex Anions

1991 ◽  
Vol 62-64 ◽  
pp. 513-514
Author(s):  
N.D. Kushch ◽  
A.A. Ignatiev ◽  
V.N. Laukhin ◽  
M.K. Makova ◽  
V.A. Merzhanov ◽  
...  
Keyword(s):  
Metal Complex ◽  
Cation Radical ◽  
Complex Anions

Synthesis of Polycycles and Oxacycles by Tandem Metathesis of endo–norbornene Derivatives

Synthesis ◽  
2021 ◽  
Author(s):  
Sambasivarao Kotha ◽  
Sunil Pulletikurti ◽  
Ambareen Fatma ◽  
gopal dhangar ◽  
gonna somu Naidu
Keyword(s):  
Natural Products ◽  
Metal Complex ◽  
Carbonyl Group ◽  
Single Step ◽  
Time Dependent ◽  
Computational Studies ◽  
Nmr Studies ◽  
Tricyclic Compounds ◽  
One Step ◽  
Norbornene Derivatives

Here, we have demonstrated that the presence of a carbonyl group at C7 position is preventing the olefin metathesis of endo-norbornene derivatives due to the complexation of the metal alkylidene. Time-dependent NMR studies showed the presence of new proton signals in the metal alkylidene region, which indicate the formation of metal complex with the carbonyl group of the substrate. These observations were further proved by ESI-MS analysis. Whereas, computational studies provided that the catalyst was interacting with the C7 carbonyl group and aligned perpendicular to that of norbornene olefin. Later, these endo-keto norbornene derivatives were reduced to hydroxyl derivatives diastereoselectively. Ring-rearrangement metathesis (RRM) of these hydroxyl derivatives, produced the [6/5/6], and [5/6/5] carbo-tricyclic cores of the natural products in one step. Whereas the RRM of O-allyl derivatives, delivered the oxa-tricyclic compounds in a single step with excellent yields.

The Prepartion of Co@C3N4 Catalyst and Applications on Synthesis of Quinolines from 2-Aminobenzyl Alcohols with Ketones

2021 ◽  
Author(s):  
Fei Cao ◽  
Anruo Mao ◽  
Bobin Yang ◽  
Chenyang Ge ◽  
Dawei Wang
Keyword(s):  
Energy Consumption ◽  
Metal Complex ◽  
Environmental Friendliness ◽  
Triazole Ligand ◽  
Earth Abundant

The unsymmetrical diphenylphosphino-pyridinyl-triazole ligand was synthesized and characterized through IR, NMR and MS and the corresponding earth-abundant metal complex (cobalt) was prepared. Considering energy consumption and environmental friendliness, it is...

scholarly journals Transcutaneous Drug Delivery Systems Based on Collagen/Polyurethane Composites Reinforced with Cellulose

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1845
Author(s):  
Narcis Anghel ◽  
Valentina Maria Dinu ◽  
Liliana Verestiuc ◽  
Irene Alexandra Spiridon
Keyword(s):  
Drug Delivery ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Metal Complex ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Fickian Diffusion ◽  
Mechanical Resistance ◽  
Natural Polymers ◽  
Transcutaneous Drug Delivery

Designing composites based on natural polymers has attracted attention for more than a decade due to the possibility to manufacture medical devices which are biocompatible with the human body. Herein, we present some biomaterials made up of collagen, polyurethane, and cellulose doped with lignin and lignin-metal complex, which served as transcutaneous drug delivery systems. Compared with base material, the compressive strength and the elastic modulus of biocomposites comprising lignin or lignin-metal complex were significantly enhanced; thus, the compressive strength increased from 61.37 to 186.5 kPa, while the elastic modulus increased from 0.828 to 1.928 MPa. The release of ketokonazole from the polymer matrix follows a Korsmeyer–Peppas type kinetics with a Fickian diffusion. All materials tested were shown to be active against pathogenic microorganisms. The mucoadhesiveness, bioadhesiveness, mechanical resistance, release kinetic, and antimicrobial activity make these biocomposites to be candidates as potential systems for controlled drug release.

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