{"doi":"10.1021/jo8010057","title":"Hetero-Double-Helix Formation by an Ethynylhelicene Oligomer Possessing Perfluorooctyl Side Chains","abstract":null,"journal":"The Journal of Organic Chemistry","year":2008,"id":656575,"datarank":0.6284482113039639,"base_score":4.189654742026425,"endowment":4.189654742026425,"self_citation_contribution":0.6284482113039639,"citation_network_contribution":0.0,"self_endowment_contribution":0.6284482113039639,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":65,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1713904,"name":"Nozomi Saito","orcid":null,"position":1,"is_corresponding":false},{"id":177628,"name":"Masahiko Yamaguchi","orcid":null,"position":2,"is_corresponding":false},{"id":184328,"name":"Ryo Amemiya","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Hetero-Double-Helix Formation by an Ethynylhelicene Oligomer Possessing Perfluorooctyl Side Chains","abstract":"Monomeric to pentameric (P)-ethynylhelicene oligomers possessing perfluorooctyl side chains were synthesized. The circular dichroism (CD) and vapor pressure osomometry (VPO) studies indicated the formation of a helix-dimer for the (P)-pentamer, for example, in trifluoromethylbenzene at 5 degrees C at concentrations above 2 x 10(-6) M. Compared with a (P)-pentamer possessing decyloxycarbonyl side chains, the perfluorooctyl (P)-pentamer exhibited lower solubilities in organic solvents, formed a thermodynamically more stable helix-dimer, and exhibited a mirror image CD spectrum. The perfluorooctyl (P)-pentamer formed a hetero-helix dimer with a decyloxycarbonyl (M)-pentamer but not with a (P)-pentamer. It indicated higher stability of the hetero-helix dimer over the homo-helix dimers.","is_dataset_classified":null,"base_score":4.189654742026425,"endowment":4.189654742026425,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"18729324","pmcid":null,"openalex_id":"https://openalex.org/W2033719034","authors":[],"funders":[],"total_grants":0,"fwci":4.7915,"citation_percentile":0.94915443,"influential_citations":0,"citation_trend":[{"year":2012,"count":6},{"year":2013,"count":6},{"year":2014,"count":6},{"year":2015,"count":3},{"year":2016,"count":4},{"year":2017,"count":2},{"year":2018,"count":2},{"year":2019,"count":3},{"year":2020,"count":1},{"year":2021,"count":2},{"year":2022,"count":1},{"year":2023,"count":1},{"year":2024,"count":1},{"year":2025,"count":1}],"oa_status":"closed","license":null,"oa_locations":[{"url":"https://pubs.acs.org/doi/pdf/10.1021/jo8010057","host_type":"publisher"},{"url":"https://doi.org/10.1021/jo8010057","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/18729324","host_type":"repository"}],"fields_of_study":["Supramolecular Self-Assembly in Materials","Porphyrin and Phthalocyanine Chemistry","Synthesis and Properties of Aromatic Compounds","Acetylene","Circular Dichroism","Fluorocarbons","Hydrogen Bonding","Molecular Structure","Osmosis","Polycyclic Compounds","Pressure","Solubility","Thermodynamics","Volatilization"],"mesh_terms":["Acetylene","Circular Dichroism","Fluorocarbons","Hydrogen Bonding","Osmosis","Polycyclic Compounds","Pressure","Solubility","Thermodynamics","Volatilization","Molecular Structure"],"keywords":["Pentamer","Dimer","Chemistry","Oligomer","Helix (gastropod)","Monomer","Circular dichroism","Side chain","Crystallography","Trimer","Stereochemistry","Polymer chemistry","Polymer","Organic chemistry"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Clean water and sanitation"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-11T21:24:06.229661Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}