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Issue 3, 2010
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From PASS 1 to YES to AND logic: building parallel processing into molecular logic gates by sequential addition of receptors

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Abstract

The synthesis and photophysical characterization of a novel molecular logic gate 4, operating in water, is demonstrated based on the competition between fluorescence and photoinduced electron transfer (PET). It is constructed according to a ‘fluorophore–spacer–receptor1–spacer–receptor2’ format where anthracene is the fluorophore, receptor1 is a tertiary amine and receptor2 is a phenyliminodiacetate ligand. Using only protons and zinc cations as the chemical inputs and fluorescence as the output, 4 is demonstrated to be both a two-input AND and INH logic gate. When 4 is examined in context to the YES logic gates 1 and 2, and the two-input AND logic gate 3 and three-input AND logic gate 5, each with one or more of the following receptors including a tertiary amine, phenyliminodiacetate or benzo-15-crown-5 ether, logic gate 4 is the missing link in the homologous series. Collectively, the molecular logic gates 1–5 corroborate the PET ‘fluorophore–spacer–receptor’ model using chemical inputs and a light-signal output and provide insight into controlling the fluorescence quantum yield of future PET-based molecular logic gates.

Graphical abstract: From PASS 1 to YES to AND logic: building parallel processing into molecular logic gates by sequential addition of receptors

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Article information


Submitted
14 Oct 2009
Accepted
03 Dec 2009
First published
12 Jan 2010

New J. Chem., 2010,34, 476-481
Article type
Paper

From PASS 1 to YES to AND logic: building parallel processing into molecular logic gates by sequential addition of receptors

D. C. Magri and A. P. de Silva, New J. Chem., 2010, 34, 476
DOI: 10.1039/B9NJ00564A

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