A facile strategy for realizing room temperature phosphorescence and single molecule white light emission

Jianguo Wang, Xinggui Gu (), Huili Ma, Qian Peng, Xiaobo Huang, Xiaoyan Zheng, Simon H. P. Sung, Guogang Shan, Jacky W. Y. Lam, Zhigang Shuai and Ben Zhong Tang ()
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Jianguo Wang: The Hong Kong University of Science and Technology, Clear Water Bay
Xinggui Gu: The Hong Kong University of Science and Technology, Clear Water Bay
Huili Ma: Tsinghua University
Qian Peng: Chinese Academy of Sciences
Xiaobo Huang: Wenzhou University
Xiaoyan Zheng: The Hong Kong University of Science and Technology, Clear Water Bay
Simon H. P. Sung: The Hong Kong University of Science and Technology, Clear Water Bay
Guogang Shan: The Hong Kong University of Science and Technology, Clear Water Bay
Jacky W. Y. Lam: The Hong Kong University of Science and Technology, Clear Water Bay
Zhigang Shuai: Tsinghua University
Ben Zhong Tang: The Hong Kong University of Science and Technology, Clear Water Bay

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Research on materials with pure organic room temperature phosphorescence (RTP) and their application as organic single-molecule white light emitters is a hot area and relies on the design of highly efficient pure organic RTP luminogens. Herein, a facile strategy of heavy-atom-participated anion–π+ interactions is proposed to construct RTP-active organic salt compounds (1,2,3,4-tetraphenyloxazoliums with different counterions). Those compounds with heavy-atom counterions (bromide and iodide ions) exhibit outstanding RTP due to the external heavy atom effect via anion–π+ interactions, evidently supported by the single-crystal X-ray diffraction analysis and theoretical calculation. Their single-molecule white light emission is realized by tuning the degree of crystallization. Such white light emission also performs well in polymer matrices and their use in 3D printing is demonstrated by white light lampshades.

Date: 2018
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DOI: 10.1038/s41467-018-05298-y

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