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dc.contributor.authorLi, Gangen_US
dc.contributor.authorWang, Shuaihuaen_US
dc.contributor.authorYang, Shufanen_US
dc.contributor.authorLiu, Guangfengen_US
dc.contributor.authorHao, Pinen_US
dc.contributor.authorZheng, Yusenen_US
dc.contributor.authorLong, Guankuien_US
dc.contributor.authorLi, Dandanen_US
dc.contributor.authorZhang, Yuen_US
dc.contributor.authorYang, Wenbinen_US
dc.contributor.authorXu, Liangen_US
dc.contributor.authorGao, Weiboen_US
dc.contributor.authorZhang, Qichunen_US
dc.contributor.authorCui, Guanweien_US
dc.contributor.authorTang, Boen_US
dc.identifier.citationLi, G., Wang, S., Yang, S., Liu, G., Hao, P., Zheng, Y., Long, G., Li, D., Zhang, Y., Yang, W., Xu, L., Gao, W., Zhang, Q., Cui, G. & Tang, B. (2019). Synthesis, photophysical properties and two-photon absorption study of tetraazachrysene-based N-heteroacenes. Chemistry - An Asian Journal, 14(10), 1807-1813.
dc.description.abstractThree novel N-heteroacene molecules (SDNU-1, SDNU-2 and SDNU-3) based on tetraazachrysene units as cores have been designed, synthesized and fully characterized. Their photophysical, electrochemical and fluorescence properties were investigated, and they exhibited blue to green emission in the solid state. Interestingly, SDNU-2 exhibited high solid photoluminescence quantum efficiencies (75.3 %), which is the highest value of N-heteroacenes derivatives to date. Two-photon absorption studies have been conducted by using the open and close aperture Z-san technique. SDNU-3 showed a significant enhancement in the two-photon absorption cross-section with magnitudes as high as about 700 GM (1 GM = 1×10⁻⁵⁰ cm⁴s/photon) when excited with 800 nm light, which is the largest value based on a heteroacene system measured by using a Z-scan experiment so far. We attribute the outcome to sufficient electronic coupling between the strong charge transfer of quadrupolar substituents and the tetraazachrysene core. Our result would provide a new guideline to design novel efficient two-photon materials based on N-heteroacene cores.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.relationRG 111/17en_US
dc.relationRG 2/17en_US
dc.relationRG 114/16en_US
dc.relationRG 8/16en_US
dc.relationMOE 2017-T2-1-021en_US
dc.relationMOE 2018-T2-1-070en_US
dc.relation.ispartofChemistry - An Asian Journalen_US
dc.rights© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.en_US
dc.titleSynthesis, photophysical properties and two-photon absorption study of tetraazachrysene-based N-heteroacenesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsFluorescence Quantum Yieldsen_US
dc.description.acknowledgementThis work was supported by the National Natural Science Foundation of China (NSFC) (No. 21535004, 91753111, 21390411, 21702132), the Key Research and Development Program of Shandong Province (No. 2018YFJH0502), Shandong Province Natural Science Foundation (No. ZR2016BM24) and STU Scientific Research Foundation for Talents (NTF15005). Q.Z acknowledges financial support from AcRF Tier 1 (RG 111/17, RG 2/17, RG 114/16, RG 8/16) and Tier 2 (MOE 2017-T2-1-021 and MOE 2018-T2-1-070), Singapore for example, L thanks the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement (No. 791207).en_US
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