Metal-organic frameworks (MOFs), porous materials composed of metal ions and organic linkers, have broad applications in separation, small molecule storage, and catalysis. Luminescent metal-organic frameworks (LMOFs) hold great potential in the development of sensors, and, with their relatively straightforward syntheses that produce predictable, homogeneous, extended structures, should result in good sensor-to-sensor reproducibility and uniform response. In addition, subtle differences in overall LMOF structure, metal ion coordination, pore surfaces, and host-guest interactions within pores should have significant impact on observed photoluminescence and provide numerous strategies for analyte detection. Highlighted here is the development of prototype LMOFs for oxygen sensing which incorporate Zn(II) cations and [Ru(L)<sub>2</sub>(dc-L)]<sup>2+</sup>, where L is 2,2’-bipyridine or 1,10-phenanthroline and dc-L is 2,2’-bypyridine-4,4’-dicarboxilic acid or 1,10-phenanthroline-4,7-dicarboxylic acid. Photophysical characterization of the LMOFs includes acquisition of luminescence excitation and emission spectra and Stern-Volmer oxygen quenching plots. When possible, the LMOF structures are also determined by single crystal X-ray diffraction. The potential for applications of LMOFs beyond oxygen-based sensing is also assessed.

Development of luminescent metal-organic frameworks for use as oxygen sensors

251st National Meeting (2016)

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