{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:VINWMIWH5X6HGR47U5OBTKVOEQ","short_pith_number":"pith:VINWMIWH","canonical_record":{"source":{"id":"2107.13795","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2021-07-29T07:43:53Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"592a21258acae1146a91c8c914f9495b7801b68ddd7422962d18d432e792270a","abstract_canon_sha256":"9589161560f2c18f60ff90bea07e8ba1a4137bb5672f45384cfe2a7ccb6037a1"},"schema_version":"1.0"},"canonical_sha256":"aa1b6622c7edfc73479fa75c19aaae240ec03c2fea7d6d3261500b0908de0b0e","source":{"kind":"arxiv","id":"2107.13795","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.13795","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"arxiv_version","alias_value":"2107.13795v1","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.13795","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"pith_short_12","alias_value":"VINWMIWH5X6H","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"pith_short_16","alias_value":"VINWMIWH5X6HGR47","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"pith_short_8","alias_value":"VINWMIWH","created_at":"2026-07-05T03:01:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:VINWMIWH5X6HGR47U5OBTKVOEQ","target":"record","payload":{"canonical_record":{"source":{"id":"2107.13795","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2021-07-29T07:43:53Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"592a21258acae1146a91c8c914f9495b7801b68ddd7422962d18d432e792270a","abstract_canon_sha256":"9589161560f2c18f60ff90bea07e8ba1a4137bb5672f45384cfe2a7ccb6037a1"},"schema_version":"1.0"},"canonical_sha256":"aa1b6622c7edfc73479fa75c19aaae240ec03c2fea7d6d3261500b0908de0b0e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:01:40.299750Z","signature_b64":"W8J7KNzLOh4rkPy11IaDL8QtAPWtF/W0fjamJTh2L10FSM44IStFsjU6G23mMtUamJdECzOApjxuwm28JKBcCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa1b6622c7edfc73479fa75c19aaae240ec03c2fea7d6d3261500b0908de0b0e","last_reissued_at":"2026-07-05T03:01:40.299334Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:01:40.299334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.13795","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:01:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OcF4qFlEtYHh+5+cZuvycGTSkdYCkiJC2LcjsJPzXU2a/N6WHfgGkJgZELmlz3pOQTxnTivDbugQgPlWajCaDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:35:55.077442Z"},"content_sha256":"c1daf13c6c5df729576d3c9ea3c3a1f95c0a34f8ed620b11a7736b97c656f22b","schema_version":"1.0","event_id":"sha256:c1daf13c6c5df729576d3c9ea3c3a1f95c0a34f8ed620b11a7736b97c656f22b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:VINWMIWH5X6HGR47U5OBTKVOEQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effect of Alkyl-group Flexibility on the Melting Point of Imidazolium-based Ionic Liquids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"physics.chem-ph","authors_text":"Edward J. Maginn, Kalil Bernardino, Mauro C. C. Ribeiro, Yong Zhang","submitted_at":"2021-07-29T07:43:53Z","abstract_excerpt":"The low melting point of room temperature ionic liquids is usually explained in terms of the presence of bulky, low symmetry and flexible ions, with the first two factors related to the lattice energy while an entropic effect is attributed to the latter. By means of molecular dynamics simulations, the melting points of 1-ethyl-3-methylimidazolium hexafluorophosphate and 1-decyl-3-methyl-imidazolium hexafluorophosphate were determined and the effect of the molecular flexibility over the melting point was explicitly computed by restraining the rotation of dihedral angles in both the solid and th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.13795","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.13795/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:01:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R57RLAx/IQlMqQrNSpVg1SDNNFq9nrnRIrnTLudJqUhyT0H/VMKErVOaM0d4G1S7B1Q1CaTC9esJ3Pu6mSCMDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:35:55.078021Z"},"content_sha256":"5d7c23d6391e87a9f31573411cd7c418dbec27d45f81482684fae59fcaa5b2e7","schema_version":"1.0","event_id":"sha256:5d7c23d6391e87a9f31573411cd7c418dbec27d45f81482684fae59fcaa5b2e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VINWMIWH5X6HGR47U5OBTKVOEQ/bundle.json","state_url":"https://pith.science/pith/VINWMIWH5X6HGR47U5OBTKVOEQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VINWMIWH5X6HGR47U5OBTKVOEQ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T17:35:55Z","links":{"resolver":"https://pith.science/pith/VINWMIWH5X6HGR47U5OBTKVOEQ","bundle":"https://pith.science/pith/VINWMIWH5X6HGR47U5OBTKVOEQ/bundle.json","state":"https://pith.science/pith/VINWMIWH5X6HGR47U5OBTKVOEQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VINWMIWH5X6HGR47U5OBTKVOEQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:VINWMIWH5X6HGR47U5OBTKVOEQ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"9589161560f2c18f60ff90bea07e8ba1a4137bb5672f45384cfe2a7ccb6037a1","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2021-07-29T07:43:53Z","title_canon_sha256":"592a21258acae1146a91c8c914f9495b7801b68ddd7422962d18d432e792270a"},"schema_version":"1.0","source":{"id":"2107.13795","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.13795","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"arxiv_version","alias_value":"2107.13795v1","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.13795","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"pith_short_12","alias_value":"VINWMIWH5X6H","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"pith_short_16","alias_value":"VINWMIWH5X6HGR47","created_at":"2026-07-05T03:01:40Z"},{"alias_kind":"pith_short_8","alias_value":"VINWMIWH","created_at":"2026-07-05T03:01:40Z"}],"graph_snapshots":[{"event_id":"sha256:5d7c23d6391e87a9f31573411cd7c418dbec27d45f81482684fae59fcaa5b2e7","target":"graph","created_at":"2026-07-05T03:01:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2107.13795/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The low melting point of room temperature ionic liquids is usually explained in terms of the presence of bulky, low symmetry and flexible ions, with the first two factors related to the lattice energy while an entropic effect is attributed to the latter. By means of molecular dynamics simulations, the melting points of 1-ethyl-3-methylimidazolium hexafluorophosphate and 1-decyl-3-methyl-imidazolium hexafluorophosphate were determined and the effect of the molecular flexibility over the melting point was explicitly computed by restraining the rotation of dihedral angles in both the solid and th","authors_text":"Edward J. Maginn, Kalil Bernardino, Mauro C. C. Ribeiro, Yong Zhang","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2021-07-29T07:43:53Z","title":"Effect of Alkyl-group Flexibility on the Melting Point of Imidazolium-based Ionic Liquids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.13795","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c1daf13c6c5df729576d3c9ea3c3a1f95c0a34f8ed620b11a7736b97c656f22b","target":"record","created_at":"2026-07-05T03:01:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"9589161560f2c18f60ff90bea07e8ba1a4137bb5672f45384cfe2a7ccb6037a1","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2021-07-29T07:43:53Z","title_canon_sha256":"592a21258acae1146a91c8c914f9495b7801b68ddd7422962d18d432e792270a"},"schema_version":"1.0","source":{"id":"2107.13795","kind":"arxiv","version":1}},"canonical_sha256":"aa1b6622c7edfc73479fa75c19aaae240ec03c2fea7d6d3261500b0908de0b0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa1b6622c7edfc73479fa75c19aaae240ec03c2fea7d6d3261500b0908de0b0e","first_computed_at":"2026-07-05T03:01:40.299334Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:01:40.299334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W8J7KNzLOh4rkPy11IaDL8QtAPWtF/W0fjamJTh2L10FSM44IStFsjU6G23mMtUamJdECzOApjxuwm28JKBcCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:01:40.299750Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.13795","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c1daf13c6c5df729576d3c9ea3c3a1f95c0a34f8ed620b11a7736b97c656f22b","sha256:5d7c23d6391e87a9f31573411cd7c418dbec27d45f81482684fae59fcaa5b2e7"],"state_sha256":"d3eb5f64cd5cbb79d70075dd82065a75e9e4db53c75566710e76fcbaca989bd5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3GAlBldofHEF05wVOdO+/V+uymVmqv222j0aKQNQOAIbyMSOCuh/NIQZ8rffHnE2OVq4KlZi3EYi0joc4/z3Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:35:55.082041Z","bundle_sha256":"97f2e70cbe29cb016cb8cbc04945dda42176378da53b20941a5aa9d0464834df"}}