The photophysical properties of diastereomeric oligostyrenes, meso (m) and racemic (r) 4,6-diphenylnonanes (PS2); mm-, mr-, and rr-4,6,8-triphenylundecanes (PS3); and mmm-, mmr-, rrm-, and rrr-4,6,8,10-tetraphenyltridecanes (PS4), in poly(methyl methacrylate) (PMMA) were studied by photostationary and transient measurements. The fluorescence spectra of PS2, PS3, and PS4 with meso diads exhibited excimer fluorescence even in PMMA solid solution where conformational changes are restricted, suggesting that the population of tt, an excimer conformer, in the meso diad is noticeable even in low molecular weight compounds such as PS2, PS3, or PS4. Monomer fluorescence of oligostyrenes in PMMA decayed single exponentially with the same time constant as that of cumene.
|Number of pages||5|
|Publication status||Published - 1990 Jan 1|
ASJC Scopus subject areas
- Materials Chemistry