Trimethylenedipyridinium Dendrimers Synthesis and Sequential Complexation of Anthraquinone Disulfonate in Molecular Shells

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dc.contributor.authorKathiresan, Murugavel
dc.contributor.authorWalder, Lorenz
dc.date.accessioned2021-12-23T16:03:51Z-
dc.date.available2021-12-23T16:03:51Z-
dc.date.issued2010
dc.identifier.issn00249297
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/6232-
dc.description.abstractThe synthesis of a new class of polycationic dendrimers of generation 0 1 and 2 (G(0) (1 07 nm), G(1) (1 63 nm), and G(2) (3 03 nm)) is described Core and 2-fold branching units consist of interconnected 1 3 5-tris(methylene)benzene and 4,4'-trimethylenedipyridinium units 4-tert-Butylbenzyl has been used as the peripheral end group because best solubility of the dendrimers was achieved The dendrimers act as a host for anthraquinone 2,6-disulfonate (AQDS) and can be stoichiometrically titrated and even overcharged as shown by H-1 NMR DOSY and cyclic voltammetry Upon loading them with AQDS, the dendrimers undergo first a contraction, they reach a minimum hydrodynamic radius for complete charge compensation and they reopen when overcharging takes place The contraction is supported by MM+ calculations Upon stepwise loading of G(2) (42 positive charges) with AQDS (2 negative charges), the first 3 mol equiv (6 negative charges) occupy the Innermost dendrimer shell (consisting of 6 positive charges) the next 6 equiv (12 negative charges) occupy the middle shell (12 positive charges), and the last 12 equiv AQDS (24 negative charges) occupy the outermost shell of the dendrimer (24 positive charges), as supported by H-1 NMR titrations yielding the magic equivalent numbers of 3 9 = 3 6 and 21 = 3 6 12
dc.description.sponsorshipDFGGerman Research Foundation (DFG)European Commission; M K thanks Graduate College 612 funded by the DFG for financial assistance M Gather's assistance during DOSY and NOESY measurements is greatly acknowledged
dc.language.isoen
dc.publisherAMER CHEMICAL SOC
dc.relation.ispartofMACROMOLECULES
dc.subjectBINDING
dc.subjectDENDRITIC MACROMOLECULES
dc.subjectDIFFUSION
dc.subjectENCAPSULATION
dc.subjectHOST-GUEST CHEMISTRY
dc.subjectPolymer Science
dc.subjectPOLYMERS
dc.subjectRECOGNITION
dc.subjectSPECTROSCOPY
dc.subjectSTEPWISE RADIAL COMPLEXATION
dc.subjectVIOLOGEN
dc.titleTrimethylenedipyridinium Dendrimers Synthesis and Sequential Complexation of Anthraquinone Disulfonate in Molecular Shells
dc.typejournal article
dc.identifier.doi10.1021/ma101925x
dc.identifier.isiISI:000284177000006
dc.description.volume43
dc.description.issue22
dc.description.startpage9248
dc.description.endpage9256
dc.contributor.orcid0000-0002-1208-5879
dc.contributor.orcid0000-0002-5497-034X
dc.contributor.researcheridC-3889-2019
dc.identifier.eissn15205835
dc.publisher.place1155 16TH ST, NW, WASHINGTON, DC 20036 USA
dcterms.isPartOf.abbreviationMacromolecules
crisitem.author.deptInstitut für Chemie neuer Materialien-
crisitem.author.deptidinstitute11-
crisitem.author.orcid0000-0002-5497-034X-
crisitem.author.parentorgFB 05 - Biologie/Chemie-
crisitem.author.grandparentorgUniversität Osnabrück-
crisitem.author.netidWaLo966-
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