A protective layer approach to solvatochromic sensors

Jung Lee, Hyun Taek Chang, Hyosung An, Sora Ahn, Jina Shim and Jong-Man Kim ()
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Jung Lee: Hanyang University
Hyun Taek Chang: Hanyang University
Hyosung An: Hanyang University
Sora Ahn: Hanyang University
Jina Shim: Hanyang University
Jong-Man Kim: Hanyang University

Nature Communications, 2013, vol. 4, issue 1, 1-9

Abstract: Abstract As they have been designed to undergo colorimetric changes that are dependent on the polarity of solvents, the majority of conventional solvatochromic molecule based sensor systems inevitably display broad overlaps in their absorption and emission bands. As a result, colorimetric differentiation of solvents of similar polarity has been extremely difficult. Here we present a tailor-made colorimetric and fluorescence turn-on type solvatochromic sensor that enables facile identification of a specific solvent. The sensor system displays a colorimetric transition only when a thin protective layer, which protects the solvatochromic materials, is destroyed or disrupted by a specific solvent. The versatility of the strategy is demonstrated by designing a sensor that differentiates chloroform and dichloromethane colorimetrically and one that performs sequence selective colorimetric sensing. In addition, the approach is employed to construct a solvatochromic molecular AND logic gate. The new strategy could open new avenues for the development of novel solvatochromic sensors.

Date: 2013
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DOI: 10.1038/ncomms3461

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