Síntese, caracterização e comportamento térmico de amidossulfonatos de terras raras


Autoria(s): Luiz,José Marques; Nunes,Ronaldo Spezia; Matos,Jivaldo do Rosário
Data(s)

01/01/2013

Resumo

Hydrated compounds prepared in aqueous solution by reaction between amidosulfonic acid [H3NSO3] and suspensions of rare earth hydroxycarbonates [Ln2(OH)x(CO3)y.zH2O] were characterized by elemental analysis (% Ln, % N and % H), infrared spectroscopy (FTIR) and thermogravimetry (TG). The compounds presented the stoichiometry Ln(NH2SO3)3.xH2O (where x = 1, 5, 2.0 or 3.0). The IR spectra showed absorptions characteristic of H2O molecules and NH2SO3 groups. Degree of hydration, thermal decomposition steps and formation of stable intermediates of the type [Ln2(SO4)3] and (Ln2O2SO4), besides formation of their oxides, was determined by thermogravimetry.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000300013

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.36 n.3 2013

Palavras-Chave #amidosulfonates #lanthanides #thermogravimetry
Tipo

journal article