{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361418519691746560.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1063/1.1734148"}},{"identifier":{"@type":"URI","@value":"https://pubs.aip.org/aip/jcp/article-pdf/39/11/3088/18831486/3088_1_online.pdf"}}],"dc:title":[{"@value":"Paramagnetic Resonance Measurements of the Phosphorescent State of Quinoxaline"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Paramagnetic resonance absorption has been observed in a single-crystal solid solution of quinoxaline in durene when irradiated at 77°K with uv light from an AH-6 mercury-arc source. The fine structure of the resonance spectrum observed at 9.8 Gc/sec may be described by the spin Hamiltonian H=BH·g·S+DSz2+E(Sx2−Sy2),in which S = 1. D/hc=±0.1007±0.0003 cm−1E/hc=∓0.0182±0.0002 cm−1  gxx=2.0047±0.0005  gyy=2.0035±0.0005gzz=2.0019±0.0005.The fine structure is practically identical to that of the naphthalene triplet state observed by Hutchison and Mangum.</jats:p>\n               <jats:p>The observed hyperfine structure is assigned to a coupling with the 5, 8 protons, and the two N14 nuclei. The angular dependence is in qualitative agreement with the tensor for C–H proton hyperfine interaction for doublet-state aromatic radicals measured by Cole, Heller, and McConnell, as well as the tensor for aromatic N14 interaction derived from experiments by Weissman. With the assumption that hyperfine interaction in a triplet state may be described by the same tensors, normalized π-electron spin densities are approximately 0.28 for the 5, 8 carbon atoms, and 0.1 for the N14 atoms. Satellite lines which are split from the primary hyperfine lines by the proton resonance frequency are observed and interpreted as simultaneous electron-spin nuclear-spin transitions. The interactions leading to these transitions are assumed to be primarily due to hyperfine coupling with protons whose unresolved first-order interaction is much smaller than the proton-resonance frequency.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381418519691746560","@type":"Researcher","foaf:name":[{"@value":"James S. Vincent"}],"jpcoar:affiliationName":[{"@value":"Mallinckrodt Chemical Laboratories, Harvard University, Cambridge, Massachusetts"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418519691746561","@type":"Researcher","foaf:name":[{"@value":"August H. Maki"}],"jpcoar:affiliationName":[{"@value":"Mallinckrodt Chemical Laboratories, Harvard University, Cambridge, Massachusetts"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00219606"},{"@type":"EISSN","@value":"10897690"}],"prism:publicationName":[{"@value":"The Journal of Chemical Physics"}],"dc:publisher":[{"@value":"AIP Publishing"}],"prism:publicationDate":"1963-12-01","prism:volume":"39","prism:number":"11","prism:startingPage":"3088","prism:endingPage":"3096"},"reviewed":"false","url":[{"@id":"https://pubs.aip.org/aip/jcp/article-pdf/39/11/3088/18831486/3088_1_online.pdf"}],"createdAt":"2005-01-06","modifiedAt":"2024-02-08","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002219099269248","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Triplet-State Zero-Field Splittings. III. Effect of the Two-Center Coulomb Repulsion Integrals"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002219099313024","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Phosphorescence of Quinoxaline-Durene Mixed Crystal — Analysis of Fine Structures and Decay Characteristics"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283694076500608","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Magnetic Properties of Some Iminoxyl Polyradicals. V. EPR Studies of the TEMPAD Biradical"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565169054755072","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"ESR Study of the Phosphorescent State of Benzo[<i>f</i>]quinoline"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1063/1.1734148"},{"@type":"CROSSREF","@value":"10.1246/bcsj.43.985_references_DOI_BXvLrbgvgbGsCmNAEefplhdavGg"},{"@type":"CROSSREF","@value":"10.1246/bcsj.43.3943_references_DOI_BXvLrbgvgbGsCmNAEefplhdavGg"},{"@type":"CROSSREF","@value":"10.1246/bcsj.53.1801_references_DOI_BXvLrbgvgbGsCmNAEefplhdavGg"},{"@type":"CROSSREF","@value":"10.1246/bcsj.46.1129_references_DOI_BXvLrbgvgbGsCmNAEefplhdavGg"}]}