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Fluorescent Molecular Logic Gates Driven by Temperature and by Protons in Solution and on Solid
Matthew E S West1, Chao-Yi Yao1, Gavin Melaugh1,2
1School of Chemistry and Chemical Engineering, Queen's University, Belfast, BT9 5AG, UK.
Abstract:
Temperature-driven fluorescent NOT logic is demonstrated by exploiting predissociation in a 1,3,5-trisubstituted Δ2 -pyrazoline on its own and when grafted onto silica microparticles. Related Δ2 -pyrazolines become proton-driven YES and NOT logic gates on the basis of fluorescent photoinduced electron transfer (PET) switches. Additional PASS 1 and YES+PASS 1 logic gates on silica are also demonstrated within the same family. Beside these small-molecule systems, a polymeric molecular thermometer based on a benzofurazan-derivatized N-isopropylacrylamide copolymer is attached to silica to produce temperature-driven fluorescent YES logic.
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