Interactions of Pyrene-Labeled Silica Particles.
Silica spheres were prepared by the Stöber method, and the method of labeling with pyrene, using aminopropylysilane as the linking agent, was optimized. Excimers between particles were formed when high concentrations of label were used. Both surfactant and polyelectrolyte addition were able to cause floc formation when added to suspensions of the silica, but only the surfactant changed the I(1)/I(3) ratio and diminished excimer formation. Copyright 2000 Academic Press.
Dewar
PJ
Chemistry Department, St Francis Xavier University, Antigonish, Nova Scotai, B2G 2W5, Canada
MacGillivray
TF
Crispo
SM
Smith-Palmer
T