biostudies-literatureLiu QNatural Science Foundation of ChinaEducation Department of Shaanxi Province805-811https://www.ebi.ac.uk/biostudies/studies/S-EPMC9076932biostudies-literatureUnknown8(2)Two conjugated small molecules with different molecular conjugation, 4',4''-(diazene-1,2-diyl)bis(2',3',5',6'-tetrafluoro-<i>N</i>,<i>N</i>-diphenyl-[1,1'-biphenyl]-4-amine) (TPA-azo-TPA) and 4,4'-(perfluorophenazine-2,7-diyl)bis(<i>N</i>,<i>N</i>-diphenylaniline) (TPA-ph-TPA), in which the electron donor triphenylamine moiety is bridged using different electron-accepting azobenzene or phenazine blocks, were designed and synthesized. The TPA-ph-TPA molecule with a larger conjugation acceptor regularly formed a nanocrystalline film and the as-fabricated memory devices exhibited outstanding non-volatile write once read many (WORM) memory effects with an ON/OFF ratio ten times higher than that of TPA-azo-TPA. Using theoretical calculations, it was speculated that the memory performance is a rRSC advancesChanging molecular conjugation with a phenazine acceptor for improvement of small molecule-based organic electronic memory performance.PMC90769322150312515JF0132013JK0658Zhao CTian GGe HLiu QfalseChanging molecular conjugation with a phenazine acceptor for improvement of small molecule-based organic electronic memory performance.Two conjugated small molecules with different molecular conjugation, 4',4''-(diazene-1,2-diyl)bis(2',3',5',6'-tetrafluoro-<i>N</i>,<i>N</i>-diphenyl-[1,1'-biphenyl]-4-amine) (TPA-azo-TPA) and 4,4'-(perfluorophenazine-2,7-diyl)bis(<i>N</i>,<i>N</i>-diphenylaniline) (TPA-ph-TPA), in which the electron donor triphenylamine moiety is bridged using different electron-accepting azobenzene or phenazine blocks, were designed and synthesized. The TPA-ph-TPA molecule with a larger conjugation acceptor regularly formed a nanocrystalline film and the as-fabricated memory devices exhibited outstanding non-volatile write once read many (WORM) memory effects with an ON/OFF ratio ten times higher than that of TPA-azo-TPA. Using theoretical calculations, it was speculated that the memory performance is a r2018-01-01T00:00:00Z2018 Jan2025-04-19T09:21:37.955Z2025-04-19T09:21:37.955ZS-EPMC90769323553897410.1039/c7ra11932a