Aromatic hydrocarbon probes of aromaticity and photochromic switching

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We investigate molecules that reversibly change properties when exposed to light of different wavelengths (color). One color of light switches the molecule to an "on" state, while a different color of light switches the molecule to an "off" state. We are investigating whether this "switch" can be connected to other molecules to change an observable property, just as a room light switch either permits electricity to flow through a circuit (light on) or not (light off). Light switches and wires are large, molecules are small. If we can use our molecules as the switch and other molecules as a wire, then this process can be made much smaller than with conventional switches, and as well we can selectively turn the switch on or off with light, rather than a mechanical device. Potential applications are in future computers and electronic devices that require switches.