DIRECT INTERCALATION OF PYRIDINIUM-DERIVATIVE CATIONS INTO THE ALPHA-ZIRCONIUM PHOSPHATE INTERLAYER BY A REDOX REACTION AND FLUORESCENCE BEHAVIOR OF THE INTERCALATION COMPOUNDS

摘要

N-alkylquinolinium (R-Qu(+)), -isoquinolinium (R-isoQu(+)) and -acridinium (R-Ac+) (R=Me, Et, Pr-n, Bu(n)) cations were directly intercalated into the alpha-zirconium phosphate (alpha-ZrP) interlayer space by redox reactions of their iodide salts. These pyridinium-derivative cations fluoresce intensively even in the alpha-ZrP interlayer, the fluorescence band being similar to the band observed in solution. The fluorescence decay curves measured for the intercalation compounds suspended in acetonitrile were reasonably fitted by assuming a double-exponential model. The compounds contain cation components with short fluorescence lifetimes compared with those observed in acetonitrile, which is explained by self-quenching due to high densities of these cations in the interlayer space. [References: 32]