{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:P2HFEIP65H3VW7ENHX5X454GAI","short_pith_number":"pith:P2HFEIP6","schema_version":"1.0","canonical_sha256":"7e8e5221fee9f75b7c8d3dfb7e778602342844e0cf2eee52aec639249c19ac62","source":{"kind":"arxiv","id":"1802.00676","version":1},"attestation_state":"computed","paper":{"title":"Spin-isomer conversion of water at room temperature, and quantum-rotor-induced nuclear polarization, in the water-endofullerene H$_2$O@C$_{60}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Benno Meier, Christian Bengs, Hana Kou\\v{r}ilov\\'a, Karel Kou\\v{r}il, Malcolm H. Levitt, Richard J. Whitby, Shamim Alom, Stuart J. Elliott, Timothy J. Barker","submitted_at":"2018-02-02T13:28:32Z","abstract_excerpt":"Water exists in two forms, para and ortho, that have nuclear spin states with different symmetries. Here we report the conversion of fullerene-encapsulated para-water to ortho-water. The enrichment of para-water at low temperatures is monitored via changes in the electrical polarizability of the material. Upon rapid dissolution of the material in toluene the excess para-water converts to ortho- water. In H$_2{}^{16}$O@C$_{60}$ the conversion leads to a slow increase in the NMR signal. In H$_2{}^{16}$O@C$_{60}$ the conversion gives rise to weak signal enhancements attributed to quantum-rotor-in"},"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":"1802.00676","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-02-02T13:28:32Z","cross_cats_sorted":[],"title_canon_sha256":"52a33e61f6a6a20b0f813ca0a8aab636d453e79872045cf4682eb57510a9b80b","abstract_canon_sha256":"42de71eaee9854c90b65bc05e082a869f5482e1d016d9d5a9309c9c2f2b62cd0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:38.515589Z","signature_b64":"kjVRnBcJ0TJd+D90bFk8ZSn6EMP3mMck96Y5z/u98Po1+gITtVcOcyAXacX+Bd1UxQ3LiDJh0/W4JfJVSbeHDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e8e5221fee9f75b7c8d3dfb7e778602342844e0cf2eee52aec639249c19ac62","last_reissued_at":"2026-05-18T00:11:38.514862Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:38.514862Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spin-isomer conversion of water at room temperature, and quantum-rotor-induced nuclear polarization, in the water-endofullerene H$_2$O@C$_{60}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Benno Meier, Christian Bengs, Hana Kou\\v{r}ilov\\'a, Karel Kou\\v{r}il, Malcolm H. Levitt, Richard J. Whitby, Shamim Alom, Stuart J. Elliott, Timothy J. Barker","submitted_at":"2018-02-02T13:28:32Z","abstract_excerpt":"Water exists in two forms, para and ortho, that have nuclear spin states with different symmetries. Here we report the conversion of fullerene-encapsulated para-water to ortho-water. The enrichment of para-water at low temperatures is monitored via changes in the electrical polarizability of the material. Upon rapid dissolution of the material in toluene the excess para-water converts to ortho- water. In H$_2{}^{16}$O@C$_{60}$ the conversion leads to a slow increase in the NMR signal. In H$_2{}^{16}$O@C$_{60}$ the conversion gives rise to weak signal enhancements attributed to quantum-rotor-in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00676","kind":"arxiv","version":1},"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":"1802.00676","created_at":"2026-05-18T00:11:38.514986+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.00676v1","created_at":"2026-05-18T00:11:38.514986+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00676","created_at":"2026-05-18T00:11:38.514986+00:00"},{"alias_kind":"pith_short_12","alias_value":"P2HFEIP65H3V","created_at":"2026-05-18T12:32:43.782077+00:00"},{"alias_kind":"pith_short_16","alias_value":"P2HFEIP65H3VW7EN","created_at":"2026-05-18T12:32:43.782077+00:00"},{"alias_kind":"pith_short_8","alias_value":"P2HFEIP6","created_at":"2026-05-18T12:32:43.782077+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/P2HFEIP65H3VW7ENHX5X454GAI","json":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI.json","graph_json":"https://pith.science/api/pith-number/P2HFEIP65H3VW7ENHX5X454GAI/graph.json","events_json":"https://pith.science/api/pith-number/P2HFEIP65H3VW7ENHX5X454GAI/events.json","paper":"https://pith.science/paper/P2HFEIP6"},"agent_actions":{"view_html":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI","download_json":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI.json","view_paper":"https://pith.science/paper/P2HFEIP6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.00676&json=true","fetch_graph":"https://pith.science/api/pith-number/P2HFEIP65H3VW7ENHX5X454GAI/graph.json","fetch_events":"https://pith.science/api/pith-number/P2HFEIP65H3VW7ENHX5X454GAI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI/action/storage_attestation","attest_author":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI/action/author_attestation","sign_citation":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI/action/citation_signature","submit_replication":"https://pith.science/pith/P2HFEIP65H3VW7ENHX5X454GAI/action/replication_record"}},"created_at":"2026-05-18T00:11:38.514986+00:00","updated_at":"2026-05-18T00:11:38.514986+00:00"}