ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Recently, highly luminescent lanthanide complexes with mixed ligands such as andβ-diketone and two herobiaryl ligands have been synthesized and suggested as promisinglight-conversion molecular devices as described by several authors. The synthesis,luminescence, quantum yields, spectroscopic characteristics, structure, among othersproperties of these complexes, including the possibility of production thin film films fromthese materials have been discussed, but little is known about their thermal decompositionkinetics. In this work we report the determination of kinetic parameters of thermaldecomposition of the complexes Gd(thd)3phen and Er(thd)3phen (thd=2,2,6,6-tetramethyl-3,5-heptanodione; phen=1,10-phenantroline) using the method proposed by Ozawa (1965). Thekinetic parameters obtained for activation energy were: 90 and 87 kJ.mol-1, the values offrequency factor were: 2.3x107 and 2.0x107 s-1 for Gd(thd)3phen and Er(thd)3phen,respectively. On the kinetic energy of the complexes, we notice the following order in thermalstability: Gd(thd)3phen 〈 Er(thd)3phen
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.513.pdf
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