Fused Isoindigo Ribbons with Absorption Bands Reaching Near‐Infrared |
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| Authors: | Yu Jiang Xiaohua Zheng Dr Yunfeng Deng Dr Hongkun Tian Prof Junqiao Ding Prof Zhigang Xie Prof Yanhou Geng Prof Fosong Wang |
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| Institution: | 1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China;2. University of Chinese Academy of Sciences, Beijing, P. R. China;3. School of Materials Science and Engineering, Tianjin University, Tianjin, P. R. China;4. Tianjin Key Laboratory of Molecular Optoelectronic Science and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, P. R. China |
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| Abstract: | Through fusing isoindigo (IID) units at 6,7;6′,7′‐positions, a series of new near‐infrared (NIR) absorbing and stable ribbon‐like conjugated molecules, namely nIIDs in which n represents the number of IID units, have been synthesized. The optical band gaps of the molecules are lowered from 2.03 eV of 1IID to 1.12 eV of 6IID with the increase of the conjugation length. 3IID, 4IID, and 6IID have strong absorption in the NIR region and exhibit photothermal conversion efficiencies of greater than 50 % under laser irradiation at λ=808 nm. |
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| Keywords: | conjugation dyes fused isoindigo NIR absorption photothermal properties |
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