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Title: Synthesis, photophysical properties and two-photon absorption study of tetraazachrysene-based N-heteroacenes
Authors: Li, Gang
Wang, Shuaihua
Yang, Shufan
Liu, Guangfeng
Hao, Pin
Zheng, Yusen
Long, Guankui
Li, Dandan
Zhang, Yu
Yang, Wenbin
Xu, Liang
Gao, Weibo
Zhang, Qichun
Cui, Guanwei
Tang, Bo
Keywords: Science::Chemistry
Issue Date: 2019
Source: Li, 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.
Project: RG 111/17
RG 2/17
RG 114/16
RG 8/16
MOE 2017-T2-1-021
MOE 2018-T2-1-070
Journal: Chemistry - An Asian Journal
Abstract: Three 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.
ISSN: 1861-4728
DOI: 10.1002/asia.201801656
Rights: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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