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Title: 1-Naphthol as an excited state proton transfer fluorescent probe for sensing bound-water hydration of polyvinyl alcohol
Authors: Kumar, A.C.
Mishra, A.K.
Keywords: Excited states
Polyvinyl alcohols
Proton transfer
Excited state proton transfer
Excited state prototropism (ESPT)
Fluorescent probe
Polymer hydration
Issue Date: 2007
Citation: Talanta, 71(5), 2003-2006
Abstract: When 1-naphthol incorporated polyvinyl alcohol (PVA) films are allowed to swell in water, there is a loss of fluorescence intensity of the neutral form with a concomitant increase of the anionic form fluorescence intensity. This fluorescence response due to the excited state prototropism (ESPT) of 1-naphthol is very sensitive to the initial stage of hydration of the PVA. Using an existing model of hydrogel swelling and DSC experiments, it was reasoned that 1-naphthol senses the bound-water component of PVA hydration. Thus, 1-naphthol is proposed as an ESPT fluorescent sensor for the specific sensing of bound-water hydration of PVA hydrogel. � 2006 Elsevier B.V. All rights reserved.
ISSN: 399140
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