Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems
2006
Аутори
Cakić, SuzanaLačnjevac, Časlav
Nikolić, Goran
Stamenković, Jakov
Rajković, Miloš
Gligorić, Miladin
Barać, Miroljub
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Кључне речи:
catalyst's selectivity / manganese(III) complexes / fourier transform infrared spectra (FTIR) / electronic spectra (UV) / electron spin resonance (ESR)Извор:
Sensors, 2006, 6, 11, 1708-1720Издавач:
- MDPI, BASEL
Финансирање / пројекти:
DOI: 10.3390/s6111708
ISSN: 1424-8220
WoS: 000244633800015
Scopus: 2-s2.0-33947407255
Институција/група
Poljoprivredni fakultetTY - 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 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" }
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
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 .
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 . .