FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2114721068> ?p ?o ?g. }

• W2114721068 endingPage "1532" @default.
• W2114721068 startingPage "1527" @default.
• W2114721068 abstract "The diprotonated, bishydroperchlorate forms of three isomeric β-octaalkyl-substituted tetrapyrrolic macro-cycles, namely, etioporphyrin II (1), etio porphycene (2), and etiocorrphycene (3), have been characterized both in chloroform solution, by UV/visible spectroscopy and 1H and proton-correlated 2D 15N NMR methods, and in the solid state, by single-crystal X-ray diffraction analyses. In the solid state, in marked contradistinction to what is observed for the corresponding free-base forms, the macrocyclic portion of these salts were found to be distorted significantly from planarity with the two perchlorate counteranions being held above and below the average N4 plane by N–H … O hydrogen bonds in all three cases. In solution, 1H and proton-correlated 2D 15N NMR experiments reveal molecular ions of relatively high symmetry (D2h, D2h, and C2v in the case of 1·(HClO4)2, 2·(HClO4)2, and 3·(HClO4)2, respectively) as would be anticipated on the basis of the solid-state results. These same NMR analyses, while revealing slight differences between the three salts in the NH and meso 1H NMR spectral regions, also serve to confirm the generalized congeneric nature of 1·(HClO4)2, 2·(HClO4)2, and 3·(HClO4)2 and support the assignment of the latter two species as being porphyrin-like salts. UV/vis analyses further support this conclusion; in all three instances, strong Soret- and Q-like transitions are observed in dichloromethane that are both distinct from each other (λmax=404, 549, 570, 593; 388, 409, 599, 666; and 419, 559, 604 for 1·(HClO4)2, 2·(HClO4)2, and 3·(HClO4)2, respectively) and from those of the corresponding free-base forms (λmax=396, 496, 530, 565, 619; 382, 570, 617, 657; and 410, 509, 539, 574, 628 for 1, 2, and 3 respectively). Protonation experiments were carried out by exposing dichloromethane solutions of the isomers to aqueous perchlorate/perchloric acid solutions of differing pH. These studies reveal that while porphycene 2 adds two protons readily and concurrently, becoming 50% diprotonated when exposed to perchlorate/perchloric solutions with a pH of around 3.6, porphyrin 1 and corrphycene 3 are protonated in a stepwise manner; they become 50% monoprotonated when exposed to perchlorate/perchloric solutions of pH≈︁3.7 and 3.9, respectively, and diprotonated at pH≤0.8 and 1.3, respectively." @default.
• W2114721068 created "2016-06-24" @default.
• W2114721068 creator A5000215293 @default.
• W2114721068 creator A5008891890 @default.
• W2114721068 creator A5055569467 @default.
• W2114721068 creator A5059722670 @default.
• W2114721068 creator A5079868859 @default.
• W2114721068 creator A5083189522 @default.
• W2114721068 date "1996-12-01" @default.
• W2114721068 modified "2023-10-03" @default.
• W2114721068 title "Solution Phase and Single Crystal Diffraction X-ray Analyses of Diprotonated Porphyrin Isomers—Etioporphyrin, Etioporphycene, and Etiocorrphycene Bishydroperchlorate Salts" @default.
• W2114721068 cites W1969093733 @default.
• W2114721068 cites W1970288957 @default.
• W2114721068 cites W1974651621 @default.
• W2114721068 cites W1988729827 @default.
• W2114721068 cites W1993759752 @default.
• W2114721068 cites W2002977794 @default.
• W2114721068 cites W2003063678 @default.
• W2114721068 cites W2008394736 @default.
• W2114721068 cites W2008838699 @default.
• W2114721068 cites W2017121266 @default.
• W2114721068 cites W2026021356 @default.
• W2114721068 cites W2036238086 @default.
• W2114721068 cites W2061645056 @default.
• W2114721068 cites W2064675063 @default.
• W2114721068 cites W2065569056 @default.
• W2114721068 cites W2073481489 @default.
• W2114721068 cites W2080470265 @default.
• W2114721068 cites W2084578179 @default.
• W2114721068 cites W2090873223 @default.
• W2114721068 cites W2094107361 @default.
• W2114721068 cites W2164964031 @default.
• W2114721068 cites W2186849486 @default.
• W2114721068 cites W4243560785 @default.
• W2114721068 doi "https://doi.org/10.1002/chem.19960021209" @default.
• W2114721068 hasPublicationYear "1996" @default.
• W2114721068 type Work @default.
• W2114721068 sameAs 2114721068 @default.
• W2114721068 citedByCount "17" @default.
• W2114721068 countsByYear W21147210682012 @default.
• W2114721068 countsByYear W21147210682015 @default.
• W2114721068 countsByYear W21147210682016 @default.
• W2114721068 countsByYear W21147210682017 @default.
• W2114721068 countsByYear W21147210682020 @default.
• W2114721068 crossrefType "journal-article" @default.
• W2114721068 hasAuthorship W2114721068A5000215293 @default.
• W2114721068 hasAuthorship W2114721068A5008891890 @default.
• W2114721068 hasAuthorship W2114721068A5055569467 @default.
• W2114721068 hasAuthorship W2114721068A5059722670 @default.
• W2114721068 hasAuthorship W2114721068A5079868859 @default.
• W2114721068 hasAuthorship W2114721068A5083189522 @default.
• W2114721068 hasConcept C103319777 @default.
• W2114721068 hasConcept C112887158 @default.
• W2114721068 hasConcept C116858620 @default.
• W2114721068 hasConcept C145148216 @default.
• W2114721068 hasConcept C147789679 @default.
• W2114721068 hasConcept C178790620 @default.
• W2114721068 hasConcept C185592680 @default.
• W2114721068 hasConcept C2776371256 @default.
• W2114721068 hasConcept C2779480358 @default.
• W2114721068 hasConcept C2780400988 @default.
• W2114721068 hasConcept C2780471494 @default.
• W2114721068 hasConcept C2780709120 @default.
• W2114721068 hasConcept C2781144210 @default.
• W2114721068 hasConcept C32909587 @default.
• W2114721068 hasConcept C71240020 @default.
• W2114721068 hasConcept C73922627 @default.
• W2114721068 hasConcept C75473681 @default.
• W2114721068 hasConcept C8010536 @default.
• W2114721068 hasConceptScore W2114721068C103319777 @default.
• W2114721068 hasConceptScore W2114721068C112887158 @default.
• W2114721068 hasConceptScore W2114721068C116858620 @default.
• W2114721068 hasConceptScore W2114721068C145148216 @default.
• W2114721068 hasConceptScore W2114721068C147789679 @default.
• W2114721068 hasConceptScore W2114721068C178790620 @default.
• W2114721068 hasConceptScore W2114721068C185592680 @default.
• W2114721068 hasConceptScore W2114721068C2776371256 @default.
• W2114721068 hasConceptScore W2114721068C2779480358 @default.
• W2114721068 hasConceptScore W2114721068C2780400988 @default.
• W2114721068 hasConceptScore W2114721068C2780471494 @default.
• W2114721068 hasConceptScore W2114721068C2780709120 @default.
• W2114721068 hasConceptScore W2114721068C2781144210 @default.
• W2114721068 hasConceptScore W2114721068C32909587 @default.
• W2114721068 hasConceptScore W2114721068C71240020 @default.
• W2114721068 hasConceptScore W2114721068C73922627 @default.
• W2114721068 hasConceptScore W2114721068C75473681 @default.
• W2114721068 hasConceptScore W2114721068C8010536 @default.
• W2114721068 hasIssue "12" @default.
• W2114721068 hasLocation W21147210681 @default.
• W2114721068 hasOpenAccess W2114721068 @default.
• W2114721068 hasPrimaryLocation W21147210681 @default.
• W2114721068 hasRelatedWork W1129757833 @default.
• W2114721068 hasRelatedWork W1972192647 @default.
• W2114721068 hasRelatedWork W1975187103 @default.
• W2114721068 hasRelatedWork W1979451697 @default.
• W2114721068 hasRelatedWork W2029210992 @default.
• W2114721068 hasRelatedWork W2031635967 @default.
• W2114721068 hasRelatedWork W2045757566 @default.

• next