Thanks for the clarification. I've done some reactions in the past and found that practice is way different than theory. I'll try it some time this week and will post if I run into anything unusual.
I work in a polymer physics lab. We regularly use fluorophores to measure polymer thin film properties such as glass transition and aging effects. It's an interesting concept- fluorophores, such as pyrene, coumarin, etc undergo a radiative decay (fluorescence) and a nonradiative decay route (vibration) when excited. When these are doped into a polymer, say polystyrene, and cooled through the polymer's glass transition temperature, the density of the polymer changes and the nonradiative decay route becomes more restricted. This results in a change in fluorescence intensity that we can use to determine Tg, etc. I've found that fluorophores which possess conjugated rings, such as pyrene, anthracene, etc "react" with SBR in a way so that it appears that energy is not conserved. to make a long story short, I've started using these rotor dyes but they need to be anchored onto something, such as a polymer chain.