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dc.contributor.authorMiyoshi, Hirokazuen_US
dc.contributor.authorNabe, Akinoen_US
dc.contributor.authorChatterjee, Shreyamen_US
dc.contributor.authorTobe, Yoshitoen_US
dc.date.accessioned2019-05-02T00:25:48Z-
dc.date.available2019-05-02T00:25:48Z-
dc.date.issued2019-04-05en_US
dc.identifier.issn0022-3263en_US
dc.identifier.urihttp://dx.doi.org/10.1021/acs.joc.8b03049en_US
dc.identifier.urihttp://hdl.handle.net/11536/151575-
dc.description.abstractTwo isomers of 9,10-dihydro-as-indacenodithiophenes (DIDTs) and the corresponding diketones having an as-indacene core were synthesized. Their thermal, photophysical, and electrochemical properties were investigated, revealing that they depend on the direction of the fusion of the thiophene rings. For the DIDTs, the effect of the mode of ring fusion on the physical properties is discussed by comparison with the previously reported derivatives of DIDT isomers with an s-indacene core. The observed difference between the highest occupied molecular orbital (HOMO)/ lowest unoccupied molecular orbital (LUMO) levels of the DIDT isomers is ascribed to the efficiency of 7z-conjugation, which depends on a- or f3-linkage between the terminal thiophenes with the central benzene ring. In addition, the effect of the peripheral aromatic ring (thiophene or benzene) is elucidated by comparison with indeno[2,1-a]fluorene (DIF) bearing an as-indacene core. The HOMO levels of DIDTs are significantly raised compared to that of structurally related DIF because of electron-donating character of the thiophene rings. For the DIDT diketones, structural effect due to the proximate carbonyl groups is discussed by comparison with the isomers with remote carbonyl groups. In diketones bearing proximate carbonyl groups, the LUMO levels are destabilized owing to antibonding interaction between the carbonyl oxygen atoms, resulting in approach of the LUMO and LUMO+1 energy levels.en_US
dc.language.isoen_USen_US
dc.title9,10-Dihydro-as-indacenodithiophenes: Isomers with an asIndacene Coreen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/acs.joc.8b03049en_US
dc.identifier.journalJOURNAL OF ORGANIC CHEMISTRYen_US
dc.citation.volume84en_US
dc.citation.issue7en_US
dc.citation.spage3927en_US
dc.citation.epage3939en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000464250800017en_US
dc.citation.woscount0en_US
Appears in Collections:Articles