Whodunit? [Re(phen)(CO)3Cl] (phen=1,10-phenanthroline) has been entrapped within a faujasite zeolite. For this material, changes in the photoluminescence intensity, wavelength, and lifetime are observed upon exposure to solvent vapors. Every solvent vapor produces a unique combination of photophysical parameters that can be used as a fingerprint of the vapor.
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