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Temperature dependence of photoluminescence and hydrogen bonding revealed for the first time in templated borate family: synthesis, structure and properties of a pentborate [Emmim][B5O6(OH)4]

Abstract

A templated borate [Emmim][B5O6(OH)4] (denoted 1, Emmim = 1-ethyl-2, 3-dimethylimidazolium) has been synthesized. It is unexpectedly observed that 1 exhibits a series of broadened luminescence curves from -183 to 75℃, the emission intensities are measured as a decreasing function of temperature and line width of the PL emission is strongly enhanced when temperatures decreased below -100℃. Besides that, hydrogen bonding (H-B) in 1 with distinctly enlarging trends was observed as temperature increasing. The influence of temperature on H-Bs and physical properties was explored through single crystal X-ray diffraction analysis, theoretical calculation, PL, and dielectric constant test. The results indicate that the temperature is important and can combine with borate crystallization to impact weak H-Bs interactions and PL can be seen as a prober to the varying of structure such as H-Bs in borate crystal.

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Publication details

The article was received on 17 Oct 2017, accepted on 05 Nov 2017 and first published on 06 Nov 2017


Article type: Paper
DOI: 10.1039/C7DT03896H
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Temperature dependence of photoluminescence and hydrogen bonding revealed for the first time in templated borate family: synthesis, structure and properties of a pentborate [Emmim][B5O6(OH)4]

    C. Pan, K. Zhou, J. Li, F. Zhao, Z. Liu and Z. Chen, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03896H

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