Journal
JOURNAL OF LUMINESCENCE
Volume 210, Issue -, Pages 485-492Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2019.01.062
Keywords
Synchronous; Fluorescence; Solid-state; Metal-organic framework; Bandgap; Electronic transition
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Funding
- Morgan State University, USA
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We report, for the first time, an experimental study of interaction of metal-organic framework (MOF) with dimethyl sulfoxide (DMSO). Adsorption of DMSO on aluminum MOF Basolite A100 results in formation of the stoichiometric complex [A100](2)[DMSO](3). The solid-state synchronous fluorescence spectroscopy allows observation of the following major excitation/emission transitions in Basolite A100 and its adsorption complex [A100](2)[DMSO](3) which are not well-resolved in conventional fluorescence spectra: 1) narrow resonance of the isolated BDC linker, 2) excitation across optical bandgap, and 3) excimers. In the adsorption complex [A100](2)[DMSO](3), the DMSO molecules interact with the mu(2)-OH group of Basolite A100 and with its BDC linker through the p-p system. We present, for the first time, the new variety of the solid-state synchronous fluorescence spectroscopy, which we denote as the solid-state enhanced-resolution synchronous fluorescence (excitation) spectroscopy. The accurate measurements of small changes in the optical bandgap of the adsorption complex [A100](2)[DMSO](3) and Basolite A100 are described by the solid-state enhanced-resolution synchronous fluorescence (excitation) spectroscopy.
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