Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional Manancial UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/14091 |
Resumo: | This work describes the synthesis and structural characterization of new organochalcogenoxanes polymer and clusters compounds containing yttrium(III) ion. The synthetized compounds have structure of unidimensional coordination polymer [Y(C6H5SeO2)2(NO3)(CH3OH)]n (1) which grows along crystallographic axis a and macromolecular clusters [(C6H5Te)18O24{Y(NO3)(H2O)}216+] (2), [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)2}212+] (3) and [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)3}210+] (4). There is a lack of study of compounds containing organocalcogenoxanes (R-E-O, where R = aryl, E = Se, Te) and its known that they compose a great variety of compounds of interesting morphologies. So, knowing that yttrium(III) ion is one of the hardest species according to Pearson’s Theory, this property was utilized to synthetize compounds where this ion coordinates to oxygen, the hard atom of organocalcogenoxanes ligands. From the reaction of phenylseleninic acid with yttrium(III) salt, a coordination polymer was synthetized (1) and the versatility of coordination modes of this ligand can be observed. In the synthesis of compounds 2, 3 and 4, phenyltellurium(IV) triiodide was utilized, which doesn’t contain any oxygen originally, but suffer an in situ hydrolysis reaction producing phenyltellurinic acid. Due to the hypervalent character of the tellurium atom, half-spheres were formed interconnected by iodine rings in (2) or phenylseleninate bridges in (3) and (4). Yttrium(III) plays an important role in the formation of this clusters because it acts as a template, confirmed due the attempt to perform the same reaction without the presence of this ion, and the impossibility to get the same compounds. The compounds were characterized by X-ray diffraction, infrared spectroscopy, elemental analysis and mass spectrometry. |
id |
UFSM-20_afc460587f7fe3e00a0941093cac0cda |
---|---|
oai_identifier_str |
oai:repositorio.ufsm.br:1/14091 |
network_acronym_str |
UFSM-20 |
network_name_str |
Repositório Institucional Manancial UFSM |
repository_id_str |
3913 |
spelling |
2018-08-23T20:38:03Z2018-08-23T20:38:03Z2017-07-26http://repositorio.ufsm.br/handle/1/14091This work describes the synthesis and structural characterization of new organochalcogenoxanes polymer and clusters compounds containing yttrium(III) ion. The synthetized compounds have structure of unidimensional coordination polymer [Y(C6H5SeO2)2(NO3)(CH3OH)]n (1) which grows along crystallographic axis a and macromolecular clusters [(C6H5Te)18O24{Y(NO3)(H2O)}216+] (2), [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)2}212+] (3) and [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)3}210+] (4). There is a lack of study of compounds containing organocalcogenoxanes (R-E-O, where R = aryl, E = Se, Te) and its known that they compose a great variety of compounds of interesting morphologies. So, knowing that yttrium(III) ion is one of the hardest species according to Pearson’s Theory, this property was utilized to synthetize compounds where this ion coordinates to oxygen, the hard atom of organocalcogenoxanes ligands. From the reaction of phenylseleninic acid with yttrium(III) salt, a coordination polymer was synthetized (1) and the versatility of coordination modes of this ligand can be observed. In the synthesis of compounds 2, 3 and 4, phenyltellurium(IV) triiodide was utilized, which doesn’t contain any oxygen originally, but suffer an in situ hydrolysis reaction producing phenyltellurinic acid. Due to the hypervalent character of the tellurium atom, half-spheres were formed interconnected by iodine rings in (2) or phenylseleninate bridges in (3) and (4). Yttrium(III) plays an important role in the formation of this clusters because it acts as a template, confirmed due the attempt to perform the same reaction without the presence of this ion, and the impossibility to get the same compounds. The compounds were characterized by X-ray diffraction, infrared spectroscopy, elemental analysis and mass spectrometry.O presente trabalho descreve a síntese e caracterização estrutural de novos compostos poliméricos e clusters derivados de organocalcogenoxanos contendo o íon ítrio(III). Os compostos sintetizados estão na forma do polímero de coordenação unidimensional [Y(C6H5SeO2)2(NO3)(CH3OH)]n (1), o qual cresce ao longo do eixo cristalográfico a, e clusters polinucleares macromoleculares [(C6H5Te)18O24{Y(NO3)(H2O)}216+] (2), [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)2}212+] (3) e [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)3}210+] (4). O estudo de compostos contendo organocalcogenoxanos (R-E-O, onde R = arila, E = Se, Te) é escasso e sabe-se que o uso dos mesmos compõe uma classe de grande variedade estrutural e morfologias interessantes. Sendo assim, sabendo-se que o íon ítrio(III) é uma das espécies de maior caráter duro de acordo com a Teoria de Pearson, utilizou-se esta propriedade para sintetizar compostos onde o ítrio(III) se coordena ao oxigênio, centro duro de ligantes derivados de organocalcogenoxanos. A partir da reação do ácido fenilselenínico com o sal de ítrio(III), obteve-se o complexo polimérico (1), no qual se pode observar a versatilidade deste ligante quanto aos seus modos de coordenação. Na síntese dos compostos (2, 3 e 4), utilizou-se triiodeto de feniltelúrio, o qual não contém originalmente oxigênio em sua composição, mas sofre uma reação de hidrólise in situ, formando o ácido feniltelurínico. Devido ao maior caráter metálico e maior raio atômico do telúrio, formam-se meia esferas interligadas por anéis de iodo em 2 ou fenilseleninatos em 3 e 4. O ítrio(III) possui papel fundamental na formação dos clusters pois atua como template, o que pode ser confirmado devido à tentativa de realizar a mesma reação sem a presença deste íon, não sendo possível obter os mesmos compostos. Os compostos obtidos foram caracterizados por difração de raios X em monocristal, espectroscopia na região do infravermelho, análise elementar e espectrometria de massas.Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqporUniversidade Federal de Santa MariaCentro de Ciências Naturais e ExatasPrograma de Pós-Graduação em QuímicaUFSMBrasilQuímicaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessOrganocalcogenoxanosÍtrio(III)Polímero de coordenaçãoCluster macromolecularOrganochalcogenoxanesYttrium(III)Coordination polymerMacromolecular clusterCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICASíntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III)Synthesis and structural characterization of new organochalcogenoxanes compounds containing yttrium(III)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisLang, Ernesto Schulzhttp://lattes.cnpq.br/4481982189769819Stieler, Rafaelhttp://lattes.cnpq.br/6824260536594075Schumacher, Ricardo Fredericohttp://lattes.cnpq.br/7856034546434135http://lattes.cnpq.br/7793853870530762Rodrigues, Jéssica Fonseca1006000000006000c9d7568-d5c4-466d-b807-0125a7d37b975d0c00dc-a90f-49b2-85ab-243052b42d704e2eba6e-3462-4f5f-85b0-3cb2ae5c69d56a26f817-0d52-41d8-9183-c785c92d110areponame:Repositório Institucional Manancial UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdfDIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdfDissertação de Mestradoapplication/pdf4595562http://repositorio.ufsm.br/bitstream/1/14091/1/DIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf1bc78c02aeae483d5f04d4deb6f80913MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8804http://repositorio.ufsm.br/bitstream/1/14091/2/license_rdfc1efe8e24d7281448e873be30ea326ffMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81956http://repositorio.ufsm.br/bitstream/1/14091/3/license.txt2f0571ecee68693bd5cd3f17c1e075dfMD53TEXTDIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.txtDIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.txtExtracted texttext/plain128146http://repositorio.ufsm.br/bitstream/1/14091/4/DIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.txtf93b61c77b37260365c04e4d54b290aeMD54THUMBNAILDIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.jpgDIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.jpgIM Thumbnailimage/jpeg4973http://repositorio.ufsm.br/bitstream/1/14091/5/DIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.jpgd7417c1fb64105ed6b2c4bf8c014d88fMD551/140912018-08-23 17:38:03.415oai:repositorio.ufsm.br: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ório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestouvidoria@ufsm.bropendoar:39132018-08-23T20:38:03Repositório Institucional Manancial UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
dc.title.alternative.eng.fl_str_mv |
Synthesis and structural characterization of new organochalcogenoxanes compounds containing yttrium(III) |
title |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
spellingShingle |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) Rodrigues, Jéssica Fonseca Organocalcogenoxanos Ítrio(III) Polímero de coordenação Cluster macromolecular Organochalcogenoxanes Yttrium(III) Coordination polymer Macromolecular cluster CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
title_full |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
title_fullStr |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
title_full_unstemmed |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
title_sort |
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III) |
author |
Rodrigues, Jéssica Fonseca |
author_facet |
Rodrigues, Jéssica Fonseca |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Lang, Ernesto Schulz |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4481982189769819 |
dc.contributor.referee1.fl_str_mv |
Stieler, Rafael |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/6824260536594075 |
dc.contributor.referee2.fl_str_mv |
Schumacher, Ricardo Frederico |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/7856034546434135 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7793853870530762 |
dc.contributor.author.fl_str_mv |
Rodrigues, Jéssica Fonseca |
contributor_str_mv |
Lang, Ernesto Schulz Stieler, Rafael Schumacher, Ricardo Frederico |
dc.subject.por.fl_str_mv |
Organocalcogenoxanos Ítrio(III) Polímero de coordenação Cluster macromolecular |
topic |
Organocalcogenoxanos Ítrio(III) Polímero de coordenação Cluster macromolecular Organochalcogenoxanes Yttrium(III) Coordination polymer Macromolecular cluster CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Organochalcogenoxanes Yttrium(III) Coordination polymer Macromolecular cluster |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
This work describes the synthesis and structural characterization of new organochalcogenoxanes polymer and clusters compounds containing yttrium(III) ion. The synthetized compounds have structure of unidimensional coordination polymer [Y(C6H5SeO2)2(NO3)(CH3OH)]n (1) which grows along crystallographic axis a and macromolecular clusters [(C6H5Te)18O24{Y(NO3)(H2O)}216+] (2), [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)2}212+] (3) and [{(C6H5Te)18O24Y(NO3)(H2O)(C6H5SeO2)3}210+] (4). There is a lack of study of compounds containing organocalcogenoxanes (R-E-O, where R = aryl, E = Se, Te) and its known that they compose a great variety of compounds of interesting morphologies. So, knowing that yttrium(III) ion is one of the hardest species according to Pearson’s Theory, this property was utilized to synthetize compounds where this ion coordinates to oxygen, the hard atom of organocalcogenoxanes ligands. From the reaction of phenylseleninic acid with yttrium(III) salt, a coordination polymer was synthetized (1) and the versatility of coordination modes of this ligand can be observed. In the synthesis of compounds 2, 3 and 4, phenyltellurium(IV) triiodide was utilized, which doesn’t contain any oxygen originally, but suffer an in situ hydrolysis reaction producing phenyltellurinic acid. Due to the hypervalent character of the tellurium atom, half-spheres were formed interconnected by iodine rings in (2) or phenylseleninate bridges in (3) and (4). Yttrium(III) plays an important role in the formation of this clusters because it acts as a template, confirmed due the attempt to perform the same reaction without the presence of this ion, and the impossibility to get the same compounds. The compounds were characterized by X-ray diffraction, infrared spectroscopy, elemental analysis and mass spectrometry. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-07-26 |
dc.date.accessioned.fl_str_mv |
2018-08-23T20:38:03Z |
dc.date.available.fl_str_mv |
2018-08-23T20:38:03Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/14091 |
url |
http://repositorio.ufsm.br/handle/1/14091 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
100600000000 |
dc.relation.confidence.fl_str_mv |
600 |
dc.relation.authority.fl_str_mv |
0c9d7568-d5c4-466d-b807-0125a7d37b97 5d0c00dc-a90f-49b2-85ab-243052b42d70 4e2eba6e-3462-4f5f-85b0-3cb2ae5c69d5 6a26f817-0d52-41d8-9183-c785c92d110a |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Naturais e Exatas |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Química |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Naturais e Exatas |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional Manancial UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Repositório Institucional Manancial UFSM |
collection |
Repositório Institucional Manancial UFSM |
bitstream.url.fl_str_mv |
http://repositorio.ufsm.br/bitstream/1/14091/1/DIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf http://repositorio.ufsm.br/bitstream/1/14091/2/license_rdf http://repositorio.ufsm.br/bitstream/1/14091/3/license.txt http://repositorio.ufsm.br/bitstream/1/14091/4/DIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.txt http://repositorio.ufsm.br/bitstream/1/14091/5/DIS_PPGQUIMICA_2017_RODRIGUES_JESSICA.pdf.jpg |
bitstream.checksum.fl_str_mv |
1bc78c02aeae483d5f04d4deb6f80913 c1efe8e24d7281448e873be30ea326ff 2f0571ecee68693bd5cd3f17c1e075df f93b61c77b37260365c04e4d54b290ae d7417c1fb64105ed6b2c4bf8c014d88f |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional Manancial UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
ouvidoria@ufsm.br |
_version_ |
1808854692778737664 |