Intercalation of 2-, 4-sulfanylpyridine, 2,2′-and 4,4′-dithiobispyridine into VOPO4 and gel-V2O5 interlayer spaces

Abstract

2-(2-Spy) and 4-sulfanylpyridine (4-Spy) have been inserted into the gel-V₂O₅ interlayer space, accompanied by oxidative S–S coupling, to form intercalation compounds including mostly N-protonated 2,2′-(2,2′-pySSpy) and 4,4′-dithiobipyridine (4,4′-pySSpy) moieties as a guest. 2,2′-pySSpy and 4,4′-pySSpy were also intercalated into the gel-V₂O₅ interlayer space to yield similar intercalation compounds. 2-Spy, 4-Spy and 4,4′-pySSpy formed no stable intercalation compounds with VOPO₄ solids, while 2,2′-pySSpy was inserted into the VOPO₄ lattice to afford an intercalation compound with fewer N-protonation sites. X-Ray diffraction patterns and X-ray photoelectron spectra of the intercalation compounds are discussed.