Quick and Selective H2S Detection

  • Author: Jonathan Faiz
  • Published Date: 19 January 2013
  • Source / Publisher: Angewandte Chemie International Edition/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Quick and Selective H<sub>2</sub>S Detection

Researchers from Nanjing University, China, have synthesized a ratiomeric fluorescent probe that reacts rapidly to H2S and is specific to mitochondria. H2S mediates a range of physiological processes, and there is a correlation between H2S levels and the occurrence of some diseases.

Zijian Guo and his team constructed their probe from coumarin and merocyanine building blocks. The merocyanine unit not only acts as a fluorophore but also a receptor for HS ions, which are the main form of H2S under physiological conditions. Addition of HS ions at neutral pH values results in the conversion of the merocyanine to the spiroform and subsequent reduction of its emission intensity, whilst the emission intensity of the coumarin unit is retained.

The probe is selective toward HS ions, and stands out from other sensing systems as it provides a very quick response (20−30 s). Imaging studies showed that the probe was preferentially distributed in mitochondria, and incubation of cells with NaHS resulted in an enhancement of the merocyanine/coumarin emission ratio. As well as its speed, one further advantage of the probe is that it can be recovered from the nucleophilic addition product at low pH values.

Article Views: 2945

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH