2011 - Europe Direct Iasi

EUROINVENT 2011
Title Post-doctoral research
Authors Dorina Mantu, Ionel I. Mangalagiu
Institution „Al. I. Cuza” University of Iasi, Faculty of Chemistry
Innovation lies in using ultrasounds as a non-conventional
method (environmental friendly) for the synthesis of new
derivatives of 1,2-diazines type 3(2H)-pyridazones, by Nalkylation
reactions. Since N-alkylation reactions under the
action of ultrasound on a nitrogen atom in a heterocycle have
been less studied, and in the class of 3(2H)-pyridazinones have
not been studied, the results are both new and current. Thus, a
comparative study conventional conditions versus ultrasound
irradiation, has made, in order to obtain the desired products
through a more efficient method. In the first stage, starting
Description heterocycles were synthesized (reactants), and then using
reactive halides, were obtained the appropriate 3(2H)pyridazinones
N-substituted.
Using ultrasonic energy has proven to be an effective method of
synthesis for all new compounds obtained. Thus, using
ultrasounds as a promoter of the N-alkylation reactions has
achieved a considerable decrease in reaction times (compared to
classical conditions) and an increase in product yield by 25%.
Since the reaction time was the same for all new compounds
synthesized, we appreciate that this method can be considered to
be general (at least for heterocyclic compounds with 1,2-diazines
structure type 3(2H)-6-phenyl-piridazones N 2 -substituted).
R.24.
Title
Authors
Institution
Description
Research on electrodeposited Zn-Co alloys thin films for
magnetic sensors applications
L. Vlad 1 , A.V. Sandu 2 , M. Dobromir 1 and V. Georgescu 1
1)
Faculty of Physics “Al. I. Cuza” University, Iasi 700506,
Romania, 2) Gheorghe Asachi Technical University of Iasi, 71
D. Mangeron Blv., 70005, Iasi, România
The purpose of our research was to obtain by a cheap
method Zn-Co thin films and to study their morphology and
magnetic properties, in order to find out technological
applications. We report here on the electrodeposition of Zn-Co
alloy of thin films onto a copper substrate, by using an original
bath based on: ZnSO4 x 7H2O, CoSO4 x 7H2O and some
additional substances (H3BO3, NaCl, Na2SO4). The alloy
composition, structure, morphology and the magnetic properties
of the films were strongly dependent on the electrodeposition
parameters, especially on the cathode potential.
Detailed SEM and XPS analyses indicated the presence of zinc
oxide (ZnO) in the samples (both in as-prepared films and after
Innovative Researches
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