Polarisations of the lowest-energy transitions of pyridine 1-oxide and 4-methylpyridine 1-oxide
Abstract
The polarisations of the two lowest energy transitions of pyridine 1-oxide have been determined by orienting the molecules in an electrically aligned nematic liquid crystal. Both are found to be polarised in the molecular plane; that at 30 000 cm–1 being perpendicular and that at 36 000 cm–1 being parallel to the long molecular axis.