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Abnormal Room Temperature Phosphorescence of Purely Organic Boron-Containing Compounds: the Relationship between the Emissive Behavior and the Molecular Packing, and the Potential Related Applications

Abstract

Purely organic materials with the characteristic of room-temperature phosphorescence (RTP) under ambient conditions demonstrate potential benefits in advanced optoelectronic applications. Exploration of versatile and efficient RTP compounds with low price are full of challenges due to the slow intersystem crossing process and ultrafast deactivation of the active excited states for organic compounds. Here, a series of boron-containing phosphors were found to present RTP with long-lived lifetimes. Among these commercially available and cheap compounds, (4-methoxyphenyl)boronic acid (PBA-MeO) exhibits long-lived RTP with a lifetime of 2.24 s, among the longest lifetime of single-component small molecules. Our extensive experiments illustrate that both rigid conformation and expanded conjugation induced by molecular alignment contribute to the persistent RTP. Because of strong intermolecular interactions through hydrogen bonds, these arylboronic acids are easy to form crystals and quite appropriate for anti-forgery materials. Subsequently, we develop the precise, speedy and convenient inkjet printing technology for the fabrication of optoelectronic displaying. Furthermore, PBA-MeO is used as an additive to feed the bombyx mori silkworms and showed low toxicity over inorganic materials. Our finding may pave a new way for the development of RTP phosphors and promote the process of practical applications.

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Publication details

The article was received on 19 Sep 2017, accepted on 09 Oct 2017 and first published on 09 Oct 2017


Article type: Edge Article
DOI: 10.1039/C7SC04098A
Citation: Chem. Sci., 2017, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Abnormal Room Temperature Phosphorescence of Purely Organic Boron-Containing Compounds: the Relationship between the Emissive Behavior and the Molecular Packing, and the Potential Related Applications

    Z. Chai, C. Wang, J. Wang, F. Liu, Y. Xie, Y. Zhang, J. J. Li, Q. Li and Z. Li, Chem. Sci., 2017, Accepted Manuscript , DOI: 10.1039/C7SC04098A

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