{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T10:13:46Z","timestamp":1790504026995,"version":"4.1.0"},"reference-count":91,"publisher":"Wiley","issue":"14","license":[{"start":{"date-parts":[[2021,2,26]],"date-time":"2021-02-26T00:00:00Z","timestamp":1614297600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["91956118"],"award-info":[{"award-number":["91956118"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2021,3,29]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This work reports the first double \u03c0\u2010extended undecabenzo[7]helicene<jats:bold>1<\/jats:bold>, which is a large chiral nanographene, composed of 65 fused rings and 186 conjugated carbon atoms. The molecular identity of<jats:bold>1<\/jats:bold>has been confirmed by single crystal X\u2010ray diffraction. A wine coloured solution of<jats:bold>1<\/jats:bold>in dichloromethane absorbs light from ultraviolet to the near infrared, featuring an extremely large molar absorption coefficient of 844\u2009000\u2005M<jats:sup>\u22121<\/jats:sup>\u2009cm<jats:sup>\u22121<\/jats:sup>at 573\u2005nm. Optically pure<jats:bold>1<\/jats:bold>shows a record high electronic circular dichroism intensity in the visible spectral range (|\u0394<jats:italic>\u03f5<\/jats:italic>|=1375\u2005M<jats:sup>\u22121<\/jats:sup>\u2009cm<jats:sup>\u22121<\/jats:sup>at 430\u2005nm) known for any discrete polycyclic aromatic hydrocarbon. These unusual photophysical properties of<jats:bold>1<\/jats:bold>contrast sharply with those of a mono\u2010undecabenzo[7]helicene derivative<jats:bold>2<\/jats:bold>.<\/jats:p>","DOI":"10.1002\/anie.202014621","type":"journal-article","created":{"date-parts":[[2021,1,10]],"date-time":"2021-01-10T05:36:01Z","timestamp":1610256961000},"page":"7796-7801","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":123,"title":["Double \u03c0\u2010Extended Undecabenzo[7]helicene"],"prefix":"10.1002","volume":"60","author":[{"given":"Ying","family":"Chen","sequence":"first","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chaojun","family":"Lin","sequence":"additional","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhixing","family":"Luo","sequence":"additional","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhibo","family":"Yin","sequence":"additional","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haonan","family":"Shi","sequence":"additional","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanpeng","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3647-3825","authenticated-orcid":false,"given":"Jiaobing","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Chemistry Sun Yat-Sen University Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,2,26]]},"reference":[{"key":"e_1_2_6_1_1","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr990322p"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/nn503283d"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1038\/natrevmats.2015.2"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.8b09232"},{"key":"e_1_2_6_6_1","unstructured":"\u00a0"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1059552"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja109671f"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201805063"},{"key":"e_1_2_6_9_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201805063"},{"key":"e_1_2_6_10_1","unstructured":"\u00a0"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja807803j"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.201302086"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201601433"},{"key":"e_1_2_6_13_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201601433"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.9b06617"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201612301"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201612301"},{"key":"e_1_2_6_16_1","unstructured":"\u00a0"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200461868"},{"key":"e_1_2_6_17_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200461868"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.7b07887"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202012335"},{"key":"e_1_2_6_19_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.202012335"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1002\/tcr.201402056"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.1021\/ar500355d"},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1039\/C6CS00623J"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201807004"},{"key":"e_1_2_6_23_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201807004"},{"key":"e_1_2_6_24_1","unstructured":"For reviews on helicene see"},{"key":"e_1_2_6_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr200087r"},{"key":"e_1_2_6_26_2","doi-asserted-by":"publisher","DOI":"10.1039\/C2CS35134J"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1002\/asia.201800073"},{"key":"e_1_2_6_28_2","first-page":"370","volume":"30","author":"Kato K.","year":"2018","journal-title":"Synlett"},{"key":"e_1_2_6_29_1","unstructured":"For double helicene 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triple helicene see"},{"key":"e_1_2_6_40_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201105105"},{"key":"e_1_2_6_40_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201105105"},{"key":"e_1_2_6_41_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.6b04368"},{"key":"e_1_2_6_42_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201805852"},{"key":"e_1_2_6_42_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201805852"},{"key":"e_1_2_6_43_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.0c01723"},{"key":"e_1_2_6_44_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.6b01303"},{"key":"e_1_2_6_45_1","unstructured":"For quintuple helicene see"},{"key":"e_1_2_6_46_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201711985"},{"key":"e_1_2_6_46_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201711985"},{"key":"e_1_2_6_47_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.9b00053"},{"key":"e_1_2_6_48_1","unstructured":"For hexapole helicene 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