Novel optical pH-sensor based on a boradiaza-indacene derivative

DOI to cite this document:: 10.5283/epub.21082

Werner, T. ; Huber, Ch. ; Heinl, S. ; Kollmannsberger, M. ; Daub, J. ; Wolfbeis, Otto S.

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Date of publication of this fulltext: 07 Jun 2011 11:17

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Abstract

A pH-optode is described based on 1, 3, 5, 7-tetramethyl-8-(4-dimethylamino)-4-difluorobora-3a, 4a-diaza-(s)-indacene (1) immobilized in a hydrogel matrix. Its uncharged form is non-fluorescent, whereas the protonated form displays strong emission. The quenching of the emission can be mechanistically explained by a PET (photoinduced electron transfer) from the dimethylamino group to the ...