The intercalation of some heterocyclic amines into alpha-titanium hydrogenphosphate - Structural and calorimetric data

dc.creatorNunes, LM
dc.creatorAiroldi, C
dc.date2000
dc.date37196
dc.date2014-12-02T16:27:09Z
dc.date2015-11-26T16:27:32Z
dc.date2014-12-02T16:27:09Z
dc.date2015-11-26T16:27:32Z
dc.date.accessioned2018-03-28T23:08:29Z
dc.date.available2018-03-28T23:08:29Z
dc.identifierJournal Of Solid State Chemistry. Academic Press Inc, v. 154, n. 2, n. 557, n. 563, 2000.
dc.identifier0022-4596
dc.identifierWOS:000165617300032
dc.identifier10.1006/jssc.2000.8879
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/73550
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/73550
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/73550
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269216
dc.descriptionThe intercalation of the heterocyclic amines 2,6-lutidine, pyrazine, piperazine, and piperidine into or-titanium hydrogenphosphate gave the maximum amounts intercalated in aqueous solutions of 0.45, 0.65, 2.77, and 6.52 mmol g(-1), respectively, through a batch method at 298 +/- 1 It. The original interlamellar distance of 760 pm increased after intercalation of piperazine and piperidine molecules, while for 2,6-lutidine and pyrazine molecules no change was observed. These results suggested that the amines were bonded only on the surface of the host. All thermochemical data were obtained on a differential isothermic microcalorimetric instrument by means of a titration procedure. From thermal effect data, the variation in enthalpy for each system gave exothermic values of - 6.56 +/- 0.10, - 1.00 +/- 0.10, - 10.10 +/- 0.34, and - 31.44 +/- 0.71 kJ mol(-1) for intercalations of the above sequence of heterocyclic amines. The infrared spectra are in agreement with acid-base reactions, involving the layered acid host O3P-OH of the inorganic matrix and the basic center atoms of the guest molecules. (C) 2000 Academic Press.
dc.description154
dc.description2
dc.description557
dc.description563
dc.languageen
dc.publisherAcademic Press Inc
dc.publisherSan Diego
dc.publisherEUA
dc.relationJournal Of Solid State Chemistry
dc.relationJ. Solid State Chem.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectlayered compounds
dc.subjectintercalation
dc.subjectalpha-titanium hydrogenphosphate
dc.subjectcalorimetry
dc.subjectheterocyclic amine
dc.subjectGamma-zirconium Phosphates
dc.subjectHydrogen Phosphate
dc.subjectN-alkylamines
dc.subjectSilica-gel
dc.subjectThermochemistry
dc.subjectAdsorption
dc.subjectPyridine
dc.subjectFeatures
dc.subjectExchange
dc.subjectSodium
dc.titleThe intercalation of some heterocyclic amines into alpha-titanium hydrogenphosphate - Structural and calorimetric data
dc.typeArtículos de revistas


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