Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy

Bucharest, Romania

Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy

Bucharest, Romania
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Oprisanu A.,Polytechnic University of Bucharest | Inel G.A.,Polytechnic University of Bucharest | Ungureanu E.-M.,Polytechnic University of Bucharest | Birzan L.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy
UPB Scientific Bulletin, Series B: Chemistry and Materials Science | Year: 2016

This work is devoted to the electrochemical characterization of two seleninyl azulene compounds. The investigations were performed by cyclic voltammetry and differential pulse voltammetry. The redox processes for each compound were established, analyzed and assessed to the particular processes which can take place during oxidation and reduction scans. This assessment was based on the similarity of the two seleninyl compounds structure connected to the number of substituents. © 2016, Politechnica University of Bucharest. All rights reserved.


Nica S.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Hanganu A.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Tanase A.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Duldner M.,Romanian National Institute for Research and Development in Chemistry and Petrochemistry | And 4 more authors.
Revista de Chimie | Year: 2015

An improved synthetic protocol for glycolytic depolymerization of of polyethylene terephthalate) (PET) from various PET wastes is described. This has been established by a screening of commercially available organocatalysts in order to determine the most efficient catalytic system for PET depolymerisation. The main products of the glycolytic reaction were found to be bis(hydroxyethyl) terephthalate (BHET) and its oligomers or unsymmetrically substituted terephtalates depending on the glycol involved in the destruction. The monitoring of the catalytic reaction and the characterization of both, PET waste and glycolyzed products were performed by 1H-NMR spectroscopy. Cyclic amidine are the most effective catalysts for the glycolytic destruction of PET with ethylene glycol, whereas guanidine - based catalyst perform better the glycolysis of PET with longer-chain diols. Outstanding catalytic activity for both 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and 1, 5,7-triazabicyclo [4.4.0] dec-5-ene (TBD) was observed for glycolytic reaction of PET with ethylene glycol - isosorbide mixture.


Razus A.C.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Cristian L.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Nica S.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Nica S.,Petru Poni Institute of Macromolecular Chemistry | And 2 more authors.
Arkivoc | Year: 2011

The synthesis of pyrylium perchlorates substituted with one or more azulen-1-ylvinyl groups was performed using conventional coupling conditions and microwave-assisted protocol. The microwave-assisted synthesis protocol is characterized by shorter reaction times, higher product selectivity and enhanced yields. High bathochromic effect was observed in the electronic spectra by substitution of the heterocycle with azulen-1-ylvinyl groups. The 1H-NMR spectra confirmed the push-pull property of the products. © ARKAT-USA, Inc.


Negut C.,Polytechnic University of Bucharest | Negut C.,Romanian National Institute for Chemical Pharmaceutical Research and Development | Ungureanu E.-M.,Polytechnic University of Bucharest | Arnold G.-L.,Polytechnic University of Bucharest | And 2 more authors.
Studia Universitatis Babes-Bolyai Chemia | Year: 2015

Electrochemical characterization of two oleamide analogues was performed by cyclic voltammetry, differential pulse voltammetry, and rotating disk electrode voltammetry. Modified electrodes have been obtained by scanning the potential in the domain of the first oxidation peaks. © 2015, Universitatea Babes-Bolyai, Catedra de Filosofie Sistematica. All rights reserved.


Inel G.A.,Polytechnic University of Bucharest | Negut C.C.,Polytechnic University of Bucharest | Mirsky V.,Sudan University of Science and Technology | Birzan L.,Institute Of Organic Chemistry Cd Nenitzescu Of Romanian Academy | Ungureanu E.-M.,Polytechnic University of Bucharest
UPB Scientific Bulletin, Series B: Chemistry and Materials Science | Year: 2015

The work has started with the electrochemical characterization of (6-methylazulene-1-yl)(phenyl)selane (L). The investigations were performed by cyclic voltammetry, differential pulse voltammetry, and rotating disk electrode. The redox processes for this new synthesized selanyl-azulenic compound were established, analyzed and assessed to the particular moieties at which they take place. Evidence for the polyL film formation by electrochemistry was obtained. Measurements of the conductivity of the polymer films obtained by two-and four-point techniques were performed in order to evaluate the contact resistance for the polymer/metal interface.

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