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J. Müller</field><field name="mods.name.top">Thomas J. J. Müller</field></doc><doc><field name="id">rosdok_disshab_0000003493-d2161524e99</field><field name="mods.nameIdentifier">gnd:38329-6</field><field name="mods.name">Universität Rostock</field><field name="mods.name.top">Universität Rostock</field></doc><doc><field name="id">rosdok_disshab_0000003493-d2161524e112</field><field name="mods.nameIdentifier">gnd:2147083-2</field><field name="mods.name">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="mods.name.top">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field></doc><field name="mods.name">Jonas Polkaehn</field><field name="mods.name">Peter Langer</field><field name="mods.name">Thomas J. J. Müller</field><field name="mods.name">Universität Rostock</field><field name="mods.name">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="mods.name.top">Jonas Polkaehn</field><field name="mods.name.top">Peter Langer</field><field name="mods.name.top">Thomas J. J. Müller</field><field name="mods.name.top">Universität Rostock</field><field name="mods.name.top">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="mods.author">Jonas Polkaehn</field><field name="mods.place">Rostock</field><field name="mods.publisher">Universität Rostock</field><field name="mods.genre">epub.dissertation</field><field name="mods.identifier">https://purl.uni-rostock.de/rosdok/id00005264</field><field name="mods.identifier">urn:nbn:de:gbv:28-rosdok_id00005264-9</field><field name="mods.identifier">10.18453/rosdok_id00005264</field><field name="mods.abstract">The main focus of the dissertation was initially on the synthesis of novel ullazine derivatives and the optimization of the individual synthesis steps. Various modifications such as substitution, π-expansion, and nitrogen doping were employed. The new structures were thoroughly investigated using different analytical methods. On the one hand, the substitution patterns of the final products were evaluated; on the other hand, the influence of the modifications was extensively compared and analyzed with ullazine structures already known from the literature.</field><field name="mods.abstract">Der Schwerpunkt der Dissertation lag zunächst auf der Synthese neuartiger Ullazin-Derivate sowie der Optimierung der einzelnen Syntheseschritte. Dabei kamen verschiedene Modifikationen wie Substitution, π-Expansion und Stickstoffdotierung zum Einsatz. Die neuen Strukturen wurden mit Hilfe von unterschiedlichen Analysemethoden eingehend untersucht. Einerseits wurde dabei eine Bewertung des Substitutionsmusters der Endprodukte, anderseits der Einfluss der Modifikationen eingehend mit bereits aus der Literatur bekannten Ullazin-Strukturen verglichen und analysiert.</field><field name="mods.dateIssued">2024</field><field name="mods.yearIssued">2024</field><field name="mods.note.other">Enthält Zeitschriftenartikel</field><field name="mods.note.referee">Peter Langer (Universität Rostock) ; Thomas J. J. Müller (Heinrich-Heine-Universität Düsseldorf)</field><field name="mods.note.personal_details">[{"name":"Langer, Peter","affil":"Universität Rostock"},{"name":"Müller, Thomas J. J.","affil":"Heinrich-Heine-Universität Düsseldorf"}]</field><field name="mods.note.university_thesis_note">Dissertation, Universität Rostock, 2025, Kumulative Dissertation</field><field name="mods.note.statement of responsibility">vorgelegt von Jonas Polkaehn</field><field name="mods.type">epub.dissertation</field><field name="search_result_link_text">1
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        rosdok/id000052641967332231Oau2026-03-262026-03-26T16:50:02ZrdaConverted from PICA to MODS using Pica2MODS XSLT Transformer 2.10 [SCM: "f6c168af690edb7cb65ef34e4a2bf7f8714c5d38" "v2.10" "2024-03-28T14:43:08+0100"] with mode 'DEFAULT'.DissertationHochschulschriftSynthesis and properties of ullazine derivativesThe main focus of the dissertation was initially on the synthesis of novel ullazine derivatives and the optimization of the individual synthesis steps. Various modifications such as substitution, π-expansion, and nitrogen doping were employed. The new structures were thoroughly investigated using different analytical methods. On the one hand, the substitution patterns of the final products were evaluated; on the other hand, the influence of the modifications was extensively compared and analyzed with ullazine structures already known from the literature.Der Schwerpunkt der Dissertation lag zunächst auf der Synthese neuartiger Ullazin-Derivate sowie der Optimierung der einzelnen Syntheseschritte. Dabei kamen verschiedene Modifikationen wie Substitution, π-Expansion und Stickstoffdotierung zum Einsatz. Die neuen Strukturen wurden mit Hilfe von unterschiedlichen Analysemethoden eingehend untersucht. Einerseits wurde dabei eine Bewertung des Substitutionsmusters der Endprodukte, anderseits der Einfluss der Modifikationen eingehend mit bereits aus der Literatur bekannten Ullazin-Strukturen verglichen und analysiert.JonasPolkaehn1997 -VerfasserInaut1394148151PeterLanger1969 -AkademischeR BetreuerIndgs132314614Universität RostockThomas J. J.MüllerAkademischeR BetreuerIndgs11370979X0000-0001-9809-724XHeinrich-Heine-Universität Düsseldorf38329-6Universität Rostock1419 - 19761990 -Grad-verleihende Institutiondgg2147083-2Universität Rostock. Mathematisch-Naturwissenschaftliche FakultätGrad-verleihende Institutiondgghttps://purl.uni-rostock.de/rosdok/id00005264urn:nbn:de:gbv:28-rosdok_id00005264-910.18453/rosdok_id00005264540 ChemieMathematisch-Naturwissenschaftliche Fakultätalle Rechte vorbehaltenNutzungsrechte erteiltLizenz Metadaten: CC0frei zugänglich (Open Access)en1 Online-Ressource (verschiedene Seitenzählungen)202407.08.2024Universität RostockRostockmonographic20252026Universitätsbibliothek RostockRostock2026Universitätsbibliothek Rostockhttps://purl.uni-rostock.de/rosdok/id00005264Enthält ZeitschriftenartikelPeter Langer (Universität Rostock) ; Thomas J. J. Müller (Heinrich-Heine-Universität Düsseldorf)[{"name":"Langer, Peter","affil":"Universität Rostock"},{"name":"Müller, Thomas J. J.","affil":"Heinrich-Heine-Universität Düsseldorf"}]Dissertation, Universität Rostock, 2025, Kumulative Dissertationvorgelegt von Jonas Polkaehn
              
                Langer, Peter
                Universität Rostock
              
              
                Müller, Thomas J. J.
                Heinrich-Heine-Universität Düsseldorf
              
            
      
    
  
  
    
      2026-03-26T16:42:49.174Z
      2026-03-26T17:12:34.752Z
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      MCRJANITOR</field><field name="derivateLabel">fulltext</field><field name="ir.pdffulltext_url">file/rosdok_disshab_0000003493/rosdok_derivate_0000226576/Polkaehn_Dissertation_2026.pdf</field><field name="mods.title">Synthesis and properties of ullazine derivatives</field><field name="mods.title.main">Synthesis and properties of ullazine derivatives</field><field name="mods.title.subtitle"></field><field name="mods.nameIdentifier">gnd:1394148151</field><field name="mods.nameIdentifier">gnd:132314614</field><field name="mods.nameIdentifier">gnd:11370979X</field><field name="mods.nameIdentifier">orcid:0000-0001-9809-724X</field><field name="mods.nameIdentifier">gnd:38329-6</field><field name="mods.nameIdentifier">gnd:2147083-2</field><field name="mods.nameIdentifier.top">gnd:1394148151</field><field name="mods.nameIdentifier.top">gnd:132314614</field><field name="mods.nameIdentifier.top">gnd:11370979X</field><field name="mods.nameIdentifier.top">orcid:0000-0001-9809-724X</field><field name="mods.nameIdentifier.top">gnd:38329-6</field><field name="mods.nameIdentifier.top">gnd:2147083-2</field><doc><field name="id">rosdok_disshab_0000003493-d2161524e54</field><field name="mods.nameIdentifier">gnd:1394148151</field><field name="mods.name">Jonas Polkaehn</field><field name="mods.name.top">Jonas Polkaehn</field></doc><doc><field name="id">rosdok_disshab_0000003493-d2161524e68</field><field name="mods.nameIdentifier">gnd:132314614</field><field name="mods.name">Peter Langer</field><field name="mods.name.top">Peter Langer</field></doc><doc><field name="id">rosdok_disshab_0000003493-d2161524e83</field><field name="mods.nameIdentifier">gnd:11370979X</field><field name="mods.nameIdentifier">orcid:0000-0001-9809-724X</field><field name="mods.name">Thomas J. J. Müller</field><field name="mods.name.top">Thomas J. J. Müller</field></doc><doc><field name="id">rosdok_disshab_0000003493-d2161524e99</field><field name="mods.nameIdentifier">gnd:38329-6</field><field name="mods.name">Universität Rostock</field><field name="mods.name.top">Universität Rostock</field></doc><doc><field name="id">rosdok_disshab_0000003493-d2161524e112</field><field name="mods.nameIdentifier">gnd:2147083-2</field><field name="mods.name">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="mods.name.top">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field></doc><field name="mods.name">Jonas Polkaehn</field><field name="mods.name">Peter Langer</field><field name="mods.name">Thomas J. J. Müller</field><field name="mods.name">Universität Rostock</field><field name="mods.name">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="mods.name.top">Jonas Polkaehn</field><field name="mods.name.top">Peter Langer</field><field name="mods.name.top">Thomas J. J. Müller</field><field name="mods.name.top">Universität Rostock</field><field name="mods.name.top">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="mods.author">Jonas Polkaehn</field><field name="mods.place">Rostock</field><field name="mods.publisher">Universität Rostock</field><field name="mods.genre">epub.dissertation</field><field name="mods.identifier">https://purl.uni-rostock.de/rosdok/id00005264</field><field name="mods.identifier">urn:nbn:de:gbv:28-rosdok_id00005264-9</field><field name="mods.identifier">10.18453/rosdok_id00005264</field><field name="mods.abstract">The main focus of the dissertation was initially on the synthesis of novel ullazine derivatives and the optimization of the individual synthesis steps. Various modifications such as substitution, π-expansion, and nitrogen doping were employed. The new structures were thoroughly investigated using different analytical methods. On the one hand, the substitution patterns of the final products were evaluated; on the other hand, the influence of the modifications was extensively compared and analyzed with ullazine structures already known from the literature.</field><field name="mods.abstract">Der Schwerpunkt der Dissertation lag zunächst auf der Synthese neuartiger Ullazin-Derivate sowie der Optimierung der einzelnen Syntheseschritte. Dabei kamen verschiedene Modifikationen wie Substitution, π-Expansion und Stickstoffdotierung zum Einsatz. Die neuen Strukturen wurden mit Hilfe von unterschiedlichen Analysemethoden eingehend untersucht. Einerseits wurde dabei eine Bewertung des Substitutionsmusters der Endprodukte, anderseits der Einfluss der Modifikationen eingehend mit bereits aus der Literatur bekannten Ullazin-Strukturen verglichen und analysiert.</field><field name="mods.dateIssued">2024</field><field name="mods.yearIssued">2024</field><field name="mods.note.other">Enthält Zeitschriftenartikel</field><field name="mods.note.referee">Peter Langer (Universität Rostock) ; Thomas J. J. Müller (Heinrich-Heine-Universität Düsseldorf)</field><field name="mods.note.personal_details">[{"name":"Langer, Peter","affil":"Universität Rostock"},{"name":"Müller, Thomas J. J.","affil":"Heinrich-Heine-Universität Düsseldorf"}]</field><field name="mods.note.university_thesis_note">Dissertation, Universität Rostock, 2025, Kumulative Dissertation</field><field name="mods.note.statement of responsibility">vorgelegt von Jonas Polkaehn</field><field name="ir.identifier">[xslt]Saxon</field><field name="recordIdentifier">rosdok/id00005264</field><field name="purl">https://purl.uni-rostock.de/rosdok/id00005264</field><field name="ppn">1967332231</field><field name="doi">10.18453/rosdok_id00005264</field><field name="urn">urn:nbn:de:gbv:28-rosdok_id00005264-9</field><field name="ir.creator.result">Jonas Polkaehn</field><field name="ir.creator.sort">Polkaehn Jonas</field><field name="ir.title.result">Synthesis and properties of ullazine derivatives</field><field name="ir.doctype.result">Dissertation</field><field name="ir.doctype_en.result">doctoral thesis</field><field name="ir.originInfo.result">Universität Rostock, 07.08.2024</field><field name="ir.abstract300.result">The main focus of the dissertation was initially on the synthesis of novel ullazine derivatives and the optimization of the individual synthesis steps. Various modifications such as substitution, π-expansion, and nitrogen doping were employed. The new structures were thoroughly investigated using…</field><field name="ir.creator_all">Jonas Polkaehn</field><field name="ir.title_all">Synthesis and properties of ullazine derivatives</field><field name="ir.location_all">Universitätsbibliothek Rostock</field><field name="ir.location_all">https://purl.uni-rostock.de/rosdok/id00005264</field><field name="ir.creator_all">Jonas</field><field name="ir.creator_all">Polkaehn</field><field name="ir.creator_all">1997 -</field><field name="ir.creator_all"></field><field name="ir.creator_all">VerfasserIn</field><field name="ir.creator_all">aut</field><field name="ir.creator_all">1394148151</field><field name="ir.creator_all">Peter</field><field name="ir.creator_all">Langer</field><field name="ir.creator_all">1969 -</field><field name="ir.creator_all"></field><field name="ir.creator_all">AkademischeR BetreuerIn</field><field name="ir.creator_all">dgs</field><field name="ir.creator_all">132314614</field><field name="ir.creator_all">Universität Rostock</field><field name="ir.creator_all">Thomas J. J.</field><field name="ir.creator_all">Müller</field><field name="ir.creator_all"></field><field name="ir.creator_all">AkademischeR BetreuerIn</field><field name="ir.creator_all">dgs</field><field name="ir.creator_all">11370979X</field><field name="ir.creator_all">0000-0001-9809-724X</field><field name="ir.creator_all">Heinrich-Heine-Universität Düsseldorf</field><field name="ir.creator_all">38329-6</field><field name="ir.creator_all">Universität Rostock</field><field name="ir.creator_all">1419 - 1976</field><field name="ir.creator_all">1990 -</field><field name="ir.creator_all"></field><field name="ir.creator_all">Grad-verleihende Institution</field><field name="ir.creator_all">dgg</field><field name="ir.creator_all">2147083-2</field><field name="ir.creator_all">Universität Rostock. Mathematisch-Naturwissenschaftliche Fakultät</field><field name="ir.creator_all"></field><field name="ir.creator_all">Grad-verleihende Institution</field><field name="ir.creator_all">dgg</field><field name="ir.identifier">[purl]https://purl.uni-rostock.de/rosdok/id00005264</field><field name="ir.identifier">[urn]urn:nbn:de:gbv:28-rosdok_id00005264-9</field><field name="ir.identifier">[doi]10.18453/rosdok_id00005264</field><field name="ir.oai.setspec.open_access">open_access</field><field name="ir.pubyear_start">2024</field><field name="ir.pubyear_end">2024</field><field name="ir.epoch_class.facet">epoch:21th_century</field><field name="ir.language_class.facet">rfc5646:en</field><field name="ir.doctype_class.facet">doctype:epub.dissertation</field><field name="ir.accesscondition_class.facet">accesscondition:openaccess</field><field name="ir.sdnb_class.facet">SDNB:540</field><field name="ir.institution_class.facet">institution:unirostock.mnf</field><field name="ir.state_class.facet">state:published</field></doc></add>