INTERCALATION OF SUBSTITUTED PYRIDINE-DERIVATIVES AND BIPYRIDINE COMPOUNDS INTO GEL-V2O5 AND VOPO4 INTERLAYER SPACES AND PROTONATION OF THEGUEST MOLECULES

Substituted pyridine derivatives (X-py: X = H, 2,4-Me-2, 2-Me, 3-Cl, 3 -Br and 4-CN) and bipyridine compounds (2,2'- and 4,4'-pyYpy: -Y- = no ne, -C2H2-, -SS- and -C2H4-) reacted with powdered gel-V2O4 . 1.6H(2)O or VOPO4 . 2H(2)O suspended in ethanol to afford intercalation compou nds. They contained 0.1-0.4 mol of guest molecules per vanadium ion. I n the V2O5-intercalation compounds, intercalation essentially occurs t hrough the diffusion of the guest molecules accompanied by the protona tion on the nitrogen atoms to some extent in the interlayer space, res ulting in a net expansion of the spacings of 4.0-5.0 Angstrom. The lon g-axis direction of the guest molecules is arranged approximately para llel to the V2O5-sheet, and hydrogen bonds are formed between the N-co mponents of the protonated guest molecules and the V=O sites. The inte rlayer distances are lengthened with an increase of the amount of the N-protonated pyridyl moieties in the interlayer space. In the VOPO4-in tercalation compounds, the net expansions of the interlayer spaces wer e 7.0-12.0 Angstrom, the guest molecules being arranged approximately perpendicular to the host layer. There is no appreciable relationship between the interlayer distances and the amounts of N-protonated pyrid yl moieties.