A pH-sensitive excited state intramolecular proton transfer fluorescent probe for imaging mitochondria and Helicobacter pylori

Kyeong Im Hong, Seong Hyun Park, Seong Min Lee, Injae Shin, Woo Dong Jang

Research output: Contribution to journalArticle

6 Citations (Scopus)


An hydroxythiophene-conjugated benzothiazole (T2(OH)B) was synthesized as a pH sensitive fluorescent probe. T2(OH)B displayed dual emission behavior due to the excited state intramolecular proton transfer (ESIPT) process, while the methoxy analogs, T2(OMe)B, did not. T2(OH)B showed strong fluorescence enhancement above physiological pHs. The applicability of T2(OH)B as a biological pH indicator was demonstrated by its use for staining mitochondrial compartment and H. pylori. Owing to its strong fluorescence emission with a large stokes shift and its effective response to pH, T2(OH)B serves as a platform for the design of new types of fluorescent probes.

Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 2019 May 1


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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