CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST

Thiourea and urea can modify their typical host properties to form new ternary polymolecular anionic halogen hosts in which the diquinuclidinium cation is included. A comparative study of the proton conductivity properties of this kind of inclusion compounds is presented. The hexagonal binary inclus...

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Autores principales:	MERCHAN,JUAN, LAVAYEN,VLADIMIR, JARA,PAUL, SANCHEZ,VICTOR, YUTRONIC,NICOLAS
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	conductivity properties supramolecular compounds ternary urea and thiourea inclusion compounds
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200011
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spelling	oai:scielo:S0717-970720080002000112009-06-09CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUESTMERCHAN,JUANLAVAYEN,VLADIMIRJARA,PAULSANCHEZ,VICTORYUTRONIC,NICOLAS conductivity properties supramolecular compounds ternary urea and thiourea inclusion compounds Thiourea and urea can modify their typical host properties to form new ternary polymolecular anionic halogen hosts in which the diquinuclidinium cation is included. A comparative study of the proton conductivity properties of this kind of inclusion compounds is presented. The hexagonal binary inclusion compound [quinuclidine]3thiourea 1 was taken as reference. The study shows the conductivity properties of [quinuclidine2H]+[thiourea2Cl]-2, [quinuclidine2H]+[thiourea2Br]- 3, [quinuclidine2H]2(2+)[thiourea2I2]2- 4, [quinuclidine2H]+[urea5Cl]- 5, [quinuclidine2H]+[urea2Br]- 6, and [quinuclidine2H]+[urea2I]- 7. Ionic conductivities of all the compounds in pellets, and of 2 and 3 in large single crystals were measured by electrochemical impedance spectroscopy (EIS). Anisotropic conductivity behaviour in crystals of adequate dimensions of 2 and 3 was detected. The conductivity values of 2 and 3 in the crystals were 2.19x10-4 and 6.03x10-6(S/cm), respectively, in the assµmed channel direction, and 2.42x10-6 and 8.27x10-9 (S/cm), respectively, in the perpendicular direction to the former, at 298 K. Conductivities at room temperature of the thiourea-halide derivatives in pellets show a changing behaviour from insulator (10-11 S/cm) for 2,3 and 4 measured in vacuµm, to semiconductor (10-7-10-8S/cm) for the thiourea-halide derivative measured at atmospheric pressure. For the urea-halide system the highest conductivity value corresponds to derivative 7 (8.66x10-5 S/cm) at atmospheric pressure, and the lowest to derivative 5 (5.48x10-7 S/cm) measured in vacuµm. Comparisons considering structural aspects are also discussed.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.2 20082008-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200011en10.4067/S0717-97072008000200011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	conductivity properties supramolecular compounds ternary urea and thiourea inclusion compounds
spellingShingle	conductivity properties supramolecular compounds ternary urea and thiourea inclusion compounds MERCHAN,JUAN LAVAYEN,VLADIMIR JARA,PAUL SANCHEZ,VICTOR YUTRONIC,NICOLAS CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST
description	Thiourea and urea can modify their typical host properties to form new ternary polymolecular anionic halogen hosts in which the diquinuclidinium cation is included. A comparative study of the proton conductivity properties of this kind of inclusion compounds is presented. The hexagonal binary inclusion compound [quinuclidine]3thiourea 1 was taken as reference. The study shows the conductivity properties of [quinuclidine2H]+[thiourea2Cl]-2, [quinuclidine2H]+[thiourea2Br]- 3, [quinuclidine2H]2(2+)[thiourea2I2]2- 4, [quinuclidine2H]+[urea5Cl]- 5, [quinuclidine2H]+[urea2Br]- 6, and [quinuclidine2H]+[urea2I]- 7. Ionic conductivities of all the compounds in pellets, and of 2 and 3 in large single crystals were measured by electrochemical impedance spectroscopy (EIS). Anisotropic conductivity behaviour in crystals of adequate dimensions of 2 and 3 was detected. The conductivity values of 2 and 3 in the crystals were 2.19x10-4 and 6.03x10-6(S/cm), respectively, in the assµmed channel direction, and 2.42x10-6 and 8.27x10-9 (S/cm), respectively, in the perpendicular direction to the former, at 298 K. Conductivities at room temperature of the thiourea-halide derivatives in pellets show a changing behaviour from insulator (10-11 S/cm) for 2,3 and 4 measured in vacuµm, to semiconductor (10-7-10-8S/cm) for the thiourea-halide derivative measured at atmospheric pressure. For the urea-halide system the highest conductivity value corresponds to derivative 7 (8.66x10-5 S/cm) at atmospheric pressure, and the lowest to derivative 5 (5.48x10-7 S/cm) measured in vacuµm. Comparisons considering structural aspects are also discussed.
author	MERCHAN,JUAN LAVAYEN,VLADIMIR JARA,PAUL SANCHEZ,VICTOR YUTRONIC,NICOLAS
author_facet	MERCHAN,JUAN LAVAYEN,VLADIMIR JARA,PAUL SANCHEZ,VICTOR YUTRONIC,NICOLAS
author_sort	MERCHAN,JUAN
title	CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST
title_short	CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST
title_full	CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST
title_fullStr	CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST
title_full_unstemmed	CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST
title_sort	conductivity properties of thiourea- and urea-halogen inclusion compounds with diquinuclidinium cation as guest
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200011
work_keys_str_mv	AT merchanjuan conductivitypropertiesofthioureaandureahalogeninclusioncompoundswithdiquinuclidiniumcationasguest AT lavayenvladimir conductivitypropertiesofthioureaandureahalogeninclusioncompoundswithdiquinuclidiniumcationasguest AT jarapaul conductivitypropertiesofthioureaandureahalogeninclusioncompoundswithdiquinuclidiniumcationasguest AT sanchezvictor conductivitypropertiesofthioureaandureahalogeninclusioncompoundswithdiquinuclidiniumcationasguest AT yutronicnicolas conductivitypropertiesofthioureaandureahalogeninclusioncompoundswithdiquinuclidiniumcationasguest
_version_	1718445387034918912

CONDUCTIVITY PROPERTIES OF THIOUREA- AND UREA-HALOGEN INCLUSION COMPOUNDS WITH DIQUINUCLIDINIUM CATION AS GUEST

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