I am looking for a commercially available fluorescent molecule which is uncharged
Is there a specific application or emission wavelength you are looking for?
Laser dye companies (like http://www.exciton.com/) will have selections of different types and wavelengths of emissive dyes available.
Antracene, pyrene, coumarin, fluorescein and their derivatives are few of many commercially available uncharged fluorescent molecule. https://omlc.org/spectra/PhotochemCAD/
there are many
depends on what you want to use if for and spectral properties
check here for available dyes
http://www.fluorophores.tugraz.at/substance/
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