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Curini R, De Robertis A, Foti C, et al. Solubility and thermal stability of some amino-mellitate compounds. Talanta. 1999;48(1):151-62doi: 10.1016/s0039-9140(98)00232-x.
Curini, R., De Robertis, A., Foti, C., Materazzi, S., & Orrù, M. A. (1999). Solubility and thermal stability of some amino-mellitate compounds. Talanta, 48(1), 151-62. https://doi.org/10.1016/s0039-9140(98)00232-x
Curini, R, et al. "Solubility and thermal stability of some amino-mellitate compounds." Talanta vol. 48,1 (1999): 151-62. doi: https://doi.org/10.1016/s0039-9140(98)00232-x
Curini R, De Robertis A, Foti C, Materazzi S, Orrù MA. Solubility and thermal stability of some amino-mellitate compounds. Talanta. 1999 Jan;48(1):151-62. doi: 10.1016/s0039-9140(98)00232-x. PMID: 18967454.
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Talanta. 1999 Jan;48(1):151-62. doi: 10.1016/s0039-9140(98)00232-x.

Solubility and thermal stability of some amino-mellitate compounds.

Talanta

R Curini, A De Robertis, C Foti, S Materazzi, M A Orrù

Affiliations

  1. Dipartimento di Chimica, Università "La Sapienza", Piazzale A. Moro, I-00100 Rome, Italy.

PMID: 18967454 DOI: 10.1016/s0039-9140(98)00232-x

Abstract

By reaction between the anion of mellitic acid (benzenehexacarboxylic acid) and some protonated linear polyamines (diethylenetriamine, triethylenetetramine, tetraethylene-pentamine, pentaethylenehexamine, spermidine, and spermine), fairly insoluble complexes have been obtained, with the general formula (amine)(x)(mellitate)H(6) (diethylenetriamine and spermidine, x=1; triethylenetetramine and spermine, x=0.75; tetraethylenepentamine, x=0.6 and 0.8; pentaethylenehexamine, x=0.5). K(s0) values for these complexes have been determined at I=0 mol dm(-3) and T=25 degrees C (logK(s0) ranges between -48.2 and -56.6). The solubility has been studied as a function of pH and of ionic strength. The thermal analysis, performed using air or argon flow, showed that all the solids behave in a similar way. In the range 20-120 degrees C the loss of hydration water occurs, and in the range 150-350 degrees C the first step of non oxidative decomposition takes place, with complete decomposition at 650 degrees C in air flow, whilst in argon flow the decomposition is still incomplete at 900 degrees C. Preliminary results of a parallel diffractometric study are also reported.

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