dc.creatorNunes, LM
dc.creatorAiroldi, C
dc.date2005
dc.dateSEP 1
dc.date2014-11-17T13:44:02Z
dc.date2015-11-26T17:38:37Z
dc.date2014-11-17T13:44:02Z
dc.date2015-11-26T17:38:37Z
dc.date.accessioned2018-03-29T00:20:16Z
dc.date.available2018-03-29T00:20:16Z
dc.identifierThermochimica Acta. Elsevier Science Bv, v. 435, n. 1, n. 118, n. 123, 2005.
dc.identifier0040-6031
dc.identifierWOS:000231783600020
dc.identifier10.1016/j.tca.2004.06.019
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/58062
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/58062
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/58062
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1286256
dc.descriptionThe heterocyclic amines, 2-,3- and 4-aminopyridine, 2-amino-4-methylpyridine and 2-aminobenzylamine, were intercalated into alpha-titanium hydrogenphosphate and characterized through infrared spectroscopy, X-ray diffractometry and thermogravimetry. On intercalation, these heterocyclic amines expanded the original 760 pm interlayer distance to 1338, 1177, 1262, 1577 and 1060 pm, for the same sequence of amines. The change in P-OH and amine group frequencies clearly indicated cyclic amine intercalation. From the combination of batch intercalation and calorimetric titration, the variation in enthalpy was calculated at 298.15 +/- 0.02 K. The exothermic enthalpic results for the intercalation process gave the sequence of values: -36.75 +/- 0.78; -20.42 +/- 0.28, -35.22 +/- 0.70, -14.02 +/- 0.10 and -29.77 +/- 0.29 kJ mol(-1), respectively. The calculated negative Gibbs free energy and the majority of the positive entropic values are in agreement with the favorable intercalation of these guest molecules inside the cavity of the host inorganic crystalline lannellar compound. (C) 2004 Published by Elsevier B.V.
dc.description435
dc.description1
dc.description118
dc.description123
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationThermochimica Acta
dc.relationThermochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectintercalation
dc.subjectthermodynamic
dc.subjectalpha-titanium hydrogenphosphate
dc.subjectN-alkylamines
dc.subjectHydrogen Phosphate
dc.subjectThermodynamic Data
dc.subjectIon-exchange
dc.subjectSilica-gel
dc.subjectFeatures
dc.subjectAlkyldiamines
dc.subjectButylamine
dc.subjectCations
dc.subjectSodium
dc.titleThermochemical data on intercalation of aromatic amines into crystalline alpha-titanium hydrogenphosphate
dc.typeArtículos de revistas


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