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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleElectrospray mass and tandem mass spectrometry of homologous and isomeric singly, doubly, triply and quadruply charged cationic ruthenated meso-(phenyl)(m)-(meta- and para-pyridyl)(n) (m+n=4) macrocyclic porphyrin complexespt_BR
dc.contributor.authorTomazela, DMpt_BR
dc.contributor.authorGozzo, FCpt_BR
dc.contributor.authorMayer, Ipt_BR
dc.contributor.authorEngelmann, RMpt_BR
dc.contributor.authorAraki, Kpt_BR
dc.contributor.authorToma, HEpt_BR
dc.contributor.authorEberlin, MNpt_BR
unicamp.author.emaileberlin@iqm.unicamppt_BR
unicamp.authorUniv Estadual Campinas, UNICAMP, Inst Chem, Thomson Mass Spectrometry Lab, BR-13083970 Campinas, SP, Brazil Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, BR-05513970 Sao Paulo, Brazilpt_BR
dc.subjectruthenated macrocyclic porphyrinspt_BR
dc.subjecttandem mass spectrometrypt_BR
dc.subjectelectrospray ionizationpt_BR
dc.subjectgas-phase ion chemistrypt_BR
dc.subject.wosMolecular-orientationpt_BR
dc.subject.wosEpitaxial-growthpt_BR
dc.subject.wosIonizationpt_BR
dc.subject.wosHomochirogenesispt_BR
dc.subject.wosElectrochemistrypt_BR
dc.subject.wosSpectroscopypt_BR
dc.subject.wosMechanismpt_BR
dc.subject.wosDimerspt_BR
dc.subject.wosSerinept_BR
dc.subject.wosKclpt_BR
dc.description.abstractTen homologous or isomeric singly, doubly, triply and quadruply charged cationic macrocyclic complexes I-Va,b(n+) (n = 1-4) formed by the coordination of [Ru(bipy)(2)Cl](+) to the pyridyl N-atoms of a series of meso-(phenyl)(m)-(meta or para-pyridyl)(n)-porphyrins (m+n = 4) were transferred to the gas phase and structurally characterized by electrospray ionization (ESI) mass (MS) and tandem mass (MS/MS) spectrometry. Previously known to be stable in solution and in the solid state, I-Va,b(n+) are found to constitute also a new class of stable, long-lived multiply charged gas-phase ions with spatially separated charge sites. Increasing intramolecular electrostatic repulsion from Ia,b(+) to IVa,b(3+) facilitates in-source and tandem collision-induced dissociation (CID). However, for the quadruply charged ions Va, b(4+), electrostatic repulsion is alleviated mainly by ion pairing with the CF3SO3- counterion forming the salt clusters [Va,b/CF3SO3](3+) and [Va,b/(CF3SO3)(2)](2+) with reduced charge states. Ion-pairing that yields [Va,b/CF3SO3](2+) is also observed as a minor ESI process for the triply charged ions IVa,b(3+). The gaseous ions I-Va,b(n+) (n = 2, 3 or 4) dissociate by sequential 'charge partitioning' with the formation of two cationic fragments by the release of [Ru(bipy)2Cl](+). The meta (a) and para (b) isomers and the positional isomers II2+ and III2+ display nearly identical ESI-MS and ESI-MS/MS spectra. ESI-MS/MS of I-Va,b(n+) shows that the Ru-py(P) is, intrinsically, the weakest bond since this bond breaks preferentially upon CID. Copyright (C) 2004 John Wiley Sons, Ltd.pt
dc.relation.ispartofJournal Of Mass Spectrometrypt_BR
dc.relation.ispartofabbreviationJ. Mass Spectrom.pt_BR
dc.publisher.cityChichesterpt_BR
dc.publisher.countryInglaterrapt_BR
dc.publisherJohn Wiley & Sons Ltdpt_BR
dc.date.issued2004pt_BR
dc.date.monthofcirculationOCTpt_BR
dc.identifier.citationJournal Of Mass Spectrometry. John Wiley & Sons Ltd, v. 39, n. 10, n. 1161, n. 1167, 2004.pt_BR
dc.language.isoenpt_BR
dc.description.volume39pt_BR
dc.description.issuenumber10pt_BR
dc.description.firstpage1161pt_BR
dc.description.lastpage1167pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.htmlpt_BR
dc.sourceWeb of Sciencept_BR
unicamp.cruespUSPpt_BR
dc.identifier.issn1076-5174pt_BR
dc.identifier.wosidWOS:000224593700008pt_BR
dc.identifier.doi10.1002/jms.699pt_BR
dc.date.available2014-11-17T05:49:56Z
dc.date.available2015-11-26T16:39:31Z-
dc.date.accessioned2014-11-17T05:49:56Z
dc.date.accessioned2015-11-26T16:39:31Z-
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dc.description.provenanceMade available in DSpace on 2015-11-26T16:39:31Z (GMT). No. of bitstreams: 2 WOS000224593700008.pdf: 208614 bytes, checksum: 20b9b51e2ba4d19ad5a84831e527d4ba (MD5) WOS000224593700008.pdf.txt: 23578 bytes, checksum: 1f6f54c0c3e7a0c5dd99d65b0209e2f3 (MD5) Previous issue date: 2004en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/64626pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/64626
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/64626-
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