TY - JOUR
T1 - Structural and thermal study of calcium undecanoate
AU - Valor, A.
AU - Kycia, S.
AU - Torres-García, E.
AU - Reguera, E.
AU - Vázquez-Ramos, C.
AU - Sánchez-Sinencio, F.
N1 - Funding Information:
The present research was partially performed at LNLS—National Synchrotron Light Laboratory, Brazil. A. Valor wants to thank LNLS for partial financial support for carrying out the project XRD858/01 and LNLS staff for their help and kindness. Also, the support with laboratory facilities of Dr. Ciro Falcony, as well as, the assistance of Eng. Marcela Guerrero and Eng. Angel Martı́nez are acknowledged.
PY - 2003/5
Y1 - 2003/5
N2 - In the present work, an X-ray diffraction (XRD) and thermal study of calcium undecanoate is presented. The measured high-resolution XRD powder pattern of the synthesized salt at room temperature, using synchrotron radiation, showed that the salt is a mixture of monohydrated and anhydrous calcium undecanoate. Calcium undecanoate monohydrate proved to have a monoclinic cell with a symmetry described by the P21/a space group. The structure dehydrates at about 100°C. After dehydration, the salt undergoes a phase transformation which results in a thermotropic mesophase. Further heating of the salt leads to decomposition and melting. Ketones are the probable products of decomposition at 400°C.
AB - In the present work, an X-ray diffraction (XRD) and thermal study of calcium undecanoate is presented. The measured high-resolution XRD powder pattern of the synthesized salt at room temperature, using synchrotron radiation, showed that the salt is a mixture of monohydrated and anhydrous calcium undecanoate. Calcium undecanoate monohydrate proved to have a monoclinic cell with a symmetry described by the P21/a space group. The structure dehydrates at about 100°C. After dehydration, the salt undergoes a phase transformation which results in a thermotropic mesophase. Further heating of the salt leads to decomposition and melting. Ketones are the probable products of decomposition at 400°C.
KW - Calcium undecanoate
KW - Infrared spectroscopy
KW - Powder diffraction
KW - Synchrotron radiation
KW - Thermal analysis
KW - Thermal decomposition
UR - http://www.scopus.com/inward/record.url?scp=0344496287&partnerID=8YFLogxK
U2 - 10.1016/S0022-4596(03)00042-2
DO - 10.1016/S0022-4596(03)00042-2
M3 - Artículo
SN - 0022-4596
VL - 172
SP - 471
EP - 479
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 2
ER -