Thermal Behavior of Sr（ll） and Ba（ll）-Diclofenac Complexes in Solid State： Study of the Dehydration and Thermal Decomposition  

作　　者：Kobelnik, Marcelo Cassimiro, Douglas Lopes Santos, Diogenesdos Dos Ribeiro, Clovis Augusto Crespi, Marisa Spirandelic 

机构地区：[1]Centro Universitdrio do Norte Paulista-UNORP, Rua Ipiranga, 3460, Sao Jose do Rio Preto, SP, Brazil [2]Instituto de Quimica, Sao Paulo State University, C.P. 355, 14800-900, Araraquara, SP, Brazil

出　　处：《Chinese Journal of Chemistry》2011年第11期2271-2277,共7页中国化学（英文版）

摘　　要：Solid state compounds of general formula Sr（Diclof）2 ·5.7H2O and Ba（Diclof）2·4.8H2O were obtained. Thermo- gravimetry （TG）, differential scanning calorimetry （DSC）, X-ray diffraction powder patterns and microscopy analysis were used to characterize these compounds. Details concerning the dehydration and thermal decomposition as well as data of kinetic parameters have been described here. The kinetic behaviors of these stages were evaluated from several heating rates with samples masses of 2 and 5 mg in open crucibles under a nitrogen atmosphere. The results of the present study improve the knowledge on these compounds including their dehydration and thermal stability. The obtained data depend on the mass of the sample which results in two kinetic behavior patterns.Solid state compounds of general formula Sr（Diclof）2 ·5.7H2O and Ba（Diclof）2·4.8H2O were obtained. Thermo- gravimetry （TG）, differential scanning calorimetry （DSC）, X-ray diffraction powder patterns and microscopy analysis were used to characterize these compounds. Details concerning the dehydration and thermal decomposition as well as data of kinetic parameters have been described here. The kinetic behaviors of these stages were evaluated from several heating rates with samples masses of 2 and 5 mg in open crucibles under a nitrogen atmosphere. The results of the present study improve the knowledge on these compounds including their dehydration and thermal stability. The obtained data depend on the mass of the sample which results in two kinetic behavior patterns.

关 键 词：DICLOFENAC divalent metal ions thermal behavior kinetic parameters 

分 类 号：TQ460.6[化学工程—制药化工] V512[航空宇航科学与技术—航空宇航推进理论与工程]