{"doi":"10.1021/jacs.0c00646","title":"The Structural Origins of Intense Circular Dichroism in a Waggling Helicene Nanoribbon","abstract":"We report the synthesis of a new perylene-diimide-based helical nanoribbon, which exhibits the largest molar electronic circular dichroism in the visible range of any molecule. This nanoribbon also displays a substantial increase in molar circular dichroism relative to a smaller helical analogue, even though they share a similar structure: both nanoribbons incorporate two conformationally dynamic double-[4]helicene termini and a rigid [6]helicene-based core within their helical superstructures. Using DFT and TDDFT calculations, we find that the double-[4]helicenes within both nanoribbons orient similarly in solution; as such, conformational differences do not account for the disparities in circular dichroism. Instead, our results implicate the configuration of the double-[6]helicene within the larger nanoribbon as the source of the observed chiroptical amplification.","journal":"Journal of the American Chemical Society","year":2020,"id":58459,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":72,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9561,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":306034,"name":"Leo A. Joyce","orcid":"0000-0002-8649-4894","position":1,"is_corresponding":false},{"id":306035,"name":"Daniel W. Paley⧓","orcid":"0000-0003-1161-5142","position":2,"is_corresponding":false},{"id":306754,"name":"Fay Ng","orcid":null,"position":3,"is_corresponding":false},{"id":256248,"name":"Michael L. Steigerwald","orcid":"0000-0001-6337-2707","position":4,"is_corresponding":false},{"id":256250,"name":"Colin Nuckolls","orcid":"0000-0002-0384-5493","position":5,"is_corresponding":false},{"id":257315,"name":"Nathaniel J. Schuster","orcid":null,"position":0,"is_corresponding":true}],"reference_count":92,"raw_metadata":null,"created_at":"2026-07-18T21:07:11.345501Z","pmid":"32243156","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":[]}