{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:7M5344EJC3H7X2M3RGDCACVIAT","short_pith_number":"pith:7M5344EJ","schema_version":"1.0","canonical_sha256":"fb3bbe708916cffbe99b8986200aa804fb3ed14b548ca116a4875e84fbcc8be9","source":{"kind":"arxiv","id":"1810.09905","version":1},"attestation_state":"computed","paper":{"title":"A Defect-Free Naphthalene Diimide Bithiazole Copolymer via Regioselective Direct Arylation Polycondensation","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alessandro Luzio, Hartmut Komber, Mario Caironi, Michael Sommer, Michele Giorgio, Rukiya Matsidik","submitted_at":"2018-10-23T15:14:00Z","abstract_excerpt":"An optimized direct arylation polycondensation (DAP) protocol for the synthesis of a novel naphthalene diimide (NDI) 2,2'-bithiazole (2-BTz) copolymer (PNDI-2-BTz) is presented. The regioselective C-H activation of 2-BTz at the 5-positions allows for the synthesis of fully regioregular and homocoupling-free PNDI-2-BTz of high molecular weight in less than 1 h in quantitative yield. Complete end group assignment shows functionalities according to monomer structures or to nucleophilic substitution, and allows for the reliable determination of absolute molecular weight. Compared to the well-known"},"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":"1810.09905","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-23T15:14:00Z","cross_cats_sorted":[],"title_canon_sha256":"3a92af3917661b10e878cf530ff850891b48712f4714a1b725693072f731ce7d","abstract_canon_sha256":"3c1b07e83d7a6fb83dbed2382ccb568c49b2a01f80df6049b05a40aaa2b6dc40"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:28.995964Z","signature_b64":"uDLHO1febf2JtiS8ArrRxy6OFIlcTdZ2UO2N1QkutYV9BRXSOuW7Dq01AnUWyosmwEVi4e/BMccgf19UwcrJCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fb3bbe708916cffbe99b8986200aa804fb3ed14b548ca116a4875e84fbcc8be9","last_reissued_at":"2026-05-18T00:02:28.994499Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:28.994499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Defect-Free Naphthalene Diimide Bithiazole Copolymer via Regioselective Direct Arylation Polycondensation","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alessandro Luzio, Hartmut Komber, Mario Caironi, Michael Sommer, Michele Giorgio, Rukiya Matsidik","submitted_at":"2018-10-23T15:14:00Z","abstract_excerpt":"An optimized direct arylation polycondensation (DAP) protocol for the synthesis of a novel naphthalene diimide (NDI) 2,2'-bithiazole (2-BTz) copolymer (PNDI-2-BTz) is presented. The regioselective C-H activation of 2-BTz at the 5-positions allows for the synthesis of fully regioregular and homocoupling-free PNDI-2-BTz of high molecular weight in less than 1 h in quantitative yield. Complete end group assignment shows functionalities according to monomer structures or to nucleophilic substitution, and allows for the reliable determination of absolute molecular weight. Compared to the well-known"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.09905","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":"1810.09905","created_at":"2026-05-18T00:02:28.994584+00:00"},{"alias_kind":"arxiv_version","alias_value":"1810.09905v1","created_at":"2026-05-18T00:02:28.994584+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.09905","created_at":"2026-05-18T00:02:28.994584+00:00"},{"alias_kind":"pith_short_12","alias_value":"7M5344EJC3H7","created_at":"2026-05-18T12:32:11.075285+00:00"},{"alias_kind":"pith_short_16","alias_value":"7M5344EJC3H7X2M3","created_at":"2026-05-18T12:32:11.075285+00:00"},{"alias_kind":"pith_short_8","alias_value":"7M5344EJ","created_at":"2026-05-18T12:32:11.075285+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/7M5344EJC3H7X2M3RGDCACVIAT","json":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT.json","graph_json":"https://pith.science/api/pith-number/7M5344EJC3H7X2M3RGDCACVIAT/graph.json","events_json":"https://pith.science/api/pith-number/7M5344EJC3H7X2M3RGDCACVIAT/events.json","paper":"https://pith.science/paper/7M5344EJ"},"agent_actions":{"view_html":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT","download_json":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT.json","view_paper":"https://pith.science/paper/7M5344EJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1810.09905&json=true","fetch_graph":"https://pith.science/api/pith-number/7M5344EJC3H7X2M3RGDCACVIAT/graph.json","fetch_events":"https://pith.science/api/pith-number/7M5344EJC3H7X2M3RGDCACVIAT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT/action/storage_attestation","attest_author":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT/action/author_attestation","sign_citation":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT/action/citation_signature","submit_replication":"https://pith.science/pith/7M5344EJC3H7X2M3RGDCACVIAT/action/replication_record"}},"created_at":"2026-05-18T00:02:28.994584+00:00","updated_at":"2026-05-18T00:02:28.994584+00:00"}