Single Molecule Fluorescence

Argon-Ion blue
[HeNe shines greenly]
lone molecule fluoresces
a distinct state seen

PPV Color Change Project (J. Phys. Chem. A 2005, 109, 10846)

Azobenzene twists
polymer backbone when lit
PPV's glow shifts

Azobenzene Stacking Project (RIP, 2002-2005)

Azobenzene links
aromatics stacked two high
flip from cis- to trans-