{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2004:KLEJLEP7M5MAUO5IPMSCEXZX47","short_pith_number":"pith:KLEJLEP7","schema_version":"1.0","canonical_sha256":"52c89591ff67580a3ba87b24225f37e7e907e1cc27446bb918d94d5b9df6fb1a","source":{"kind":"arxiv","id":"cond-mat/0411448","version":2},"attestation_state":"computed","paper":{"title":"Highly 13C isotope enriched azafullerene, C59N, for nuclear spin labelling","license":"","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Rockenbauer, F. Fulop, F. Simon, H. Kuzmany, L. Korecz","submitted_at":"2004-11-17T17:44:24Z","abstract_excerpt":"Synthesis of highly $^{13}$C isotope enriched azafullerene, C$_{59}$N embedded in C$_{60}$ is reported. $^{13}$C enriched fullerenes, produced with the Kr\\\"{a}tschmer-Huffmann process, were subject to a N$_{2}$ discharge that produces C$_{59}$N with a low probability. Raman spectroscopy indicates a homogeneous $^{13}$C distribution. Electron spin resonance measurement (ESR) proves that the C$_{59}$N concentration, 0.2 %, is similar as in non-enriched fullerenes. The ESR spectrum is simulated accurately with the known $^{14}$N and $^{13}$C hyperfine coupling constants. The material enables the "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"cond-mat/0411448","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2004-11-17T17:44:24Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"6623fb8a55674f46dba442ecdaa292f16aef7bdb99b58691a30bda030c3dd2bf","abstract_canon_sha256":"271947b356a623f8628b5a2fb264aafd0cc1b8de93d9a589e297fddcd784079f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:39:57.365095Z","signature_b64":"Uh8GUmsXBvvmJzjXNvyHHo2jd+2B7WNK8qal3VEQjBQ6vNIW9MokhT+jwlpj5RMFnCJQqswkvgJG0/cBQq+WDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52c89591ff67580a3ba87b24225f37e7e907e1cc27446bb918d94d5b9df6fb1a","last_reissued_at":"2026-05-18T01:39:57.364680Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:39:57.364680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Highly 13C isotope enriched azafullerene, C59N, for nuclear spin labelling","license":"","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Rockenbauer, F. Fulop, F. Simon, H. Kuzmany, L. Korecz","submitted_at":"2004-11-17T17:44:24Z","abstract_excerpt":"Synthesis of highly $^{13}$C isotope enriched azafullerene, C$_{59}$N embedded in C$_{60}$ is reported. $^{13}$C enriched fullerenes, produced with the Kr\\\"{a}tschmer-Huffmann process, were subject to a N$_{2}$ discharge that produces C$_{59}$N with a low probability. Raman spectroscopy indicates a homogeneous $^{13}$C distribution. Electron spin resonance measurement (ESR) proves that the C$_{59}$N concentration, 0.2 %, is similar as in non-enriched fullerenes. The ESR spectrum is simulated accurately with the known $^{14}$N and $^{13}$C hyperfine coupling constants. The material enables the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0411448","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0411448","created_at":"2026-05-18T01:39:57.364731+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0411448v2","created_at":"2026-05-18T01:39:57.364731+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0411448","created_at":"2026-05-18T01:39:57.364731+00:00"},{"alias_kind":"pith_short_12","alias_value":"KLEJLEP7M5MA","created_at":"2026-05-18T12:25:52.687210+00:00"},{"alias_kind":"pith_short_16","alias_value":"KLEJLEP7M5MAUO5I","created_at":"2026-05-18T12:25:52.687210+00:00"},{"alias_kind":"pith_short_8","alias_value":"KLEJLEP7","created_at":"2026-05-18T12:25:52.687210+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47","json":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47.json","graph_json":"https://pith.science/api/pith-number/KLEJLEP7M5MAUO5IPMSCEXZX47/graph.json","events_json":"https://pith.science/api/pith-number/KLEJLEP7M5MAUO5IPMSCEXZX47/events.json","paper":"https://pith.science/paper/KLEJLEP7"},"agent_actions":{"view_html":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47","download_json":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47.json","view_paper":"https://pith.science/paper/KLEJLEP7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/0411448&json=true","fetch_graph":"https://pith.science/api/pith-number/KLEJLEP7M5MAUO5IPMSCEXZX47/graph.json","fetch_events":"https://pith.science/api/pith-number/KLEJLEP7M5MAUO5IPMSCEXZX47/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47/action/storage_attestation","attest_author":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47/action/author_attestation","sign_citation":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47/action/citation_signature","submit_replication":"https://pith.science/pith/KLEJLEP7M5MAUO5IPMSCEXZX47/action/replication_record"}},"created_at":"2026-05-18T01:39:57.364731+00:00","updated_at":"2026-05-18T01:39:57.364731+00:00"}