A New Half-Condensed Schiff Base Compound : Highly Selective and Sensitive pH-Responsive Fluorescent Sensor

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Saha, Uday Chand ; Dhara, Koushik ; Chattopadhyay, Basab ; Mandal, Sushil Kumar ; Mondal, Swastik ; Sen, Supriti ; Mukherjee, Monika ; van Smaalen, Sander ; Chattopadhyay, Pabitra:
A New Half-Condensed Schiff Base Compound : Highly Selective and Sensitive pH-Responsive Fluorescent Sensor.
In: Organic Letters. Bd. 13 (2011) Heft 17 . - S. 4510-4513.
ISSN 1523-7052
DOI: https://doi.org/10.1021/ol201652r

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Abstract

A new probe, 3-(3-benzyloxypyridin-2-ylimino)methyl-2-hydroxy-5-methylbenzaldehyde (1-H) behaves as a highly selective fluorescent pH sensor in a Britton–Robinson buffer at 25 °C. The pH titrations show a 250-fold increase in fluorescence intensity within the pH range of 4.2 to 8.3 with a pKa value of 6.63 which is valuable for studying many of the biological organelles.