Facile and Rapid Visualization of Colorless Endocrine Disruptor Bisphenol A by Interfacial Charge‐Transfer Transitions with TiO 2 Nanoparticles

Bisphenol A (BPA) is an estrogen‐mimicking endocrine disruptor, which has been widely used in the production of polycarbonates and epoxy resins. Because BPA is a colorless material owing to the wide HOMO‐LUMO gap of ca. 4.3 eV, we cannot discern toxic BPA dissolved in solution with eyes. Here, we re...

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Bibliographic Details
Published in:ChemistrySelect (Weinheim) 2017-07, Vol.2 (21), p.6097-6099
Main Authors: Fujisawa, Jun‐ichi, Matsumura, Shingo, Hanaya, Minoru
Format: Article
Language:English
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Summary:Bisphenol A (BPA) is an estrogen‐mimicking endocrine disruptor, which has been widely used in the production of polycarbonates and epoxy resins. Because BPA is a colorless material owing to the wide HOMO‐LUMO gap of ca. 4.3 eV, we cannot discern toxic BPA dissolved in solution with eyes. Here, we report a facile and rapid method for visible‐light sensing of BPA with TiO 2 nanoparticles. The chemical adsorption of BPA on anatase TiO 2 nanoparticles via the two phenol groups induces interfacial charge‐transfer (ICT) transitions from BPA to TiO 2 in the visible region. The ICT transitions give rise to visible‐light absorption up to ca. 600 nm, allowing visible‐light sensing of BPA. This method is also applicable to other phenol‐containing endocrine disruptors. More generally, to our best knowledge, this is the first demonstration for visible‐light sensing of colorless toxic organic compounds based on ICT transitions.
ISSN:2365-6549
2365-6549
DOI:10.1002/slct.201700590