University of Belgrade - Faculty of Agriculture
AgroSpace - Faculty of Agriculture Repository
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrillic)
    • Serbian (Latin)
  • Login
View Item 
  •   AgroSpace
  • Poljoprivredni fakultet
  • Radovi istraživača / Researchers’ publications
  • View Item
  •   AgroSpace
  • Poljoprivredni fakultet
  • Radovi istraživača / Researchers’ publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems

Thumbnail
2006
1335.pdf (264.4Kb)
Authors
Cakić, Suzana
Lačnjevac, Časlav
Nikolić, Goran
Stamenković, Jakov
Rajković, Miloš
Gligorić, Miladin
Barać, Miroljub
Article (Published version)
Metadata
Show full item record
Abstract
The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) an...d at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.

Keywords:
catalyst's selectivity / manganese(III) complexes / fourier transform infrared spectra (FTIR) / electronic spectra (UV) / electron spin resonance (ESR)
Source:
Sensors, 2006, 6, 11, 1708-1720
Publisher:
  • MDPI, BASEL
Funding / projects:
  • Nove metode i tehnike za separaciju i specijaciju hemijskih elemenata u tragovima, organskih supstanci i radionuklida i identifikaciju njihovih izvora (RS-142039)

DOI: 10.3390/s6111708

ISSN: 1424-8220

WoS: 000244633800015

Scopus: 2-s2.0-33947407255
[ Google Scholar ]
20
18
URI
http://aspace.agrif.bg.ac.rs/handle/123456789/1338
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Poljoprivredni fakultet
TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Nikolić, Goran
AU  - Stamenković, Jakov
AU  - Rajković, Miloš
AU  - Gligorić, Miladin
AU  - Barać, Miroljub
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1338
AB  - The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) and at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems
EP  - 1720
IS  - 11
SP  - 1708
VL  - 6
DO  - 10.3390/s6111708
UR  - conv_4281
ER  - 
@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Nikolić, Goran and Stamenković, Jakov and Rajković, Miloš and Gligorić, Miladin and Barać, Miroljub",
year = "2006",
abstract = "The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) and at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems",
pages = "1720-1708",
number = "11",
volume = "6",
doi = "10.3390/s6111708",
url = "conv_4281"
}
Cakić, S., Lačnjevac, Č., Nikolić, G., Stamenković, J., Rajković, M., Gligorić, M.,& Barać, M.. (2006). Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems. in Sensors
MDPI, BASEL., 6(11), 1708-1720.
https://doi.org/10.3390/s6111708
conv_4281
Cakić S, Lačnjevac Č, Nikolić G, Stamenković J, Rajković M, Gligorić M, Barać M. Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems. in Sensors. 2006;6(11):1708-1720.
doi:10.3390/s6111708
conv_4281 .
Cakić, Suzana, Lačnjevac, Časlav, Nikolić, Goran, Stamenković, Jakov, Rajković, Miloš, Gligorić, Miladin, Barać, Miroljub, "Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems" in Sensors, 6, no. 11 (2006):1708-1720,
https://doi.org/10.3390/s6111708 .,
conv_4281 .

DSpace software copyright © 2002-2015  DuraSpace
About the AgroSpace Repository | Send Feedback

re3dataOpenAIRERCUB
 

 

All of DSpaceInstitutions/communitiesAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About the AgroSpace Repository | Send Feedback

re3dataOpenAIRERCUB