Polystyrene (PS), poly(methyl methacrylate), poly(vinyl acetate), and
1,2-poly(1,3-butadiene) were labeled with naphthyl groups using a focu
sed UV lamp irradiation technique. Photolabelings of PS with anthracen
e, fluorene, and phenanthrene chromophores were also readily achieved.
Fast labeling rates and high labeling efficiency (greater-than-or-equ
al-to 40 labels per PS chain) were achieved when PS was irradiated in
the presence of 9-bromofluorene or 9-bromophenanthrene. No significant
molecular-weight changes were observed in the PS photolabeling system
s. The fluorescent labels attached to the PS chain were characterized
by spectroscopic analysis.