Document Type

Article

Department/Program

Chemistry

Journal Title

Journal of Physical Chemistry B

Pub Date

3-28-2013

Volume

117

Issue

12

Journal Article URL

http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC3627219&blobtype=pdf

First Page

3323

Abstract

The local solvent acidities (SA scale) of six 6-carbonyl-2-aminonaphthalene derivatives as beta-cyclodextrin complexes in water are determined through fluorescence quenching. The local polarities (E-T(N) scale) are determined through the shift of the emission center-of-mass. The apparent SA values reflect the solvent structure surrounding the guest's carbonyl group, whereas the apparent E-T(N) values reveal the net polarity of the entire guest molecule. Comparison of these values affords greater insight into the structures of the host-guest complexes. Derivatives 1 and 5 show unusually large acidities, indicative of highly exposed carbonyl groups. The remaining compounds give emission intensities pointing to shielded carbonyl groups. In this study, PRODAN and its derivatives are functioning as dual channel sensors of their local environment.

DOI

10.1021/jp400765x

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