Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 99: Issue 3
Thermal, spectral and antimicrobial study on some Cu(II) complexes with ligands bearing biguanide moieties
Authors:
Rodica Olar University of Bucharest Faculty of Chemistry, Department of Inorganic Chemistry 90-92 Panduri Str. Sector 5 050663 Bucharest Romania

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Mihaela Badea University of Bucharest Faculty of Chemistry, Department of Inorganic Chemistry 90-92 Panduri Str. Sector 5 050663 Bucharest Romania

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Dana Marinescu University of Bucharest Faculty of Chemistry, Department of Inorganic Chemistry 90-92 Panduri Str. Sector 5 050663 Bucharest Romania

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Emilia Iorgulescu University of Bucharest Faculty of Chemistry, Department of Analytical Chemistry 90-92 Panduri Str. Sector 5 050663 Bucharest Romania

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Eliza Frunza University of Bucharest Faculty of Chemistry, Department of Inorganic Chemistry 90-92 Panduri Str. Sector 5 050663 Bucharest Romania

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Veronica Lazar University of Bucharest Faculty of Biology, Department of Microbiology 1-3 Aleea Portocalilor St., Sector 6 060101 Bucharest Romania

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Carmen Chifiriuc University of Bucharest Faculty of Biology, Department of Microbiology 1-3 Aleea Portocalilor St., Sector 6 060101 Bucharest Romania

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Pages:
815–821
Online Publication Date:
16 Sep 2009
Publication Date:
01 Mar 2010
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-009-0414-8
Keywords:
Antimicrobial activity; Copper (II) complex; One pot condensation; Thermal behaviour; o-Tolylbiguanide
Restricted access

Abstract  

New complexes of type [Cu(HTBG)2]Cl2 (1), [Cu(TBG)2]·3H2O (2) and [CuL]·nH2O (3) L:L1, n = 2 and (4) L:L2, n = 1 (HTBG: 2-tolylbiguanide, L1 and L2: ligands resulted from 2-tolylbiguanide, ammonia/hydrazine and formaldehyde one pot condensation) were synthesised and characterised. The features of complexes have been assigned from microanalytical, IR and UV–Vis data. Redox behaviour was established by cyclic voltammetry. The in vitro qualitative and quantitative antimicrobial activity assays showed that the complexes exhibited variable antimicrobial activity against Gram-negative and Gram-positive strains isolated from the hospital environment. The thermal analyses have evidenced the thermal intervals of stability and also the thermodynamic effects that accompany them. After water elimination, complexes have a similar thermal behaviour. Processes as water elimination, melting, chloride anion removal as well as oxidative degradation of the organic ligands were observed. The final product of decomposition was copper (II) oxide.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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