| Abstract
| - The sorption of anthracene (ANT) in non Brønsted acidic ZSM-5 zeolite through the mere exposure at roomtemperature of solid ANT and dehydrated zeolite crystals with Li3.4(AlO2)n(SiO2)96-n chemical formulas perunit cell generates spontaneous ionization of ANT (IP 7.44 eV in the gas phase). In contrast, ANT was foundto be sorbed as an intact molecule in M3.4ZSM-5 with M = Na+, K+, Rb+, and Cs+. The radical cation(ANT•+) of the long-lived ANT•+@Li3.4ZSM-5•- pair was characterized by conventional diffuse reflectanceUV−visible and resonance Raman spectrometry. In contrast, the X-band continuous wave (CW) EPR signalwas found to be typical of a weakly coupled spin correlated ion pair. The two-dimension hyperfine sublevelcorrelation (2D-HYSCORE) spectra provide a detailed description of the microenvironment of the trappedelectron of the ANT•+@LinZSM-5•- pair. The trapped electron appears localized in close proximity of occludedANT•+, Li+, and the Si−O−Al nearest group of the zeolite framework.
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