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Synthesis, Cellular Delivery and In vivo Application of Dendrimer-based pH Sensors
Published on: September 10, 2013
A new half-condensed Schiff base compound: highly selective and sensitive pH-responsive fluorescent sensor.
Uday Chand Saha1, Koushik Dhara, Basab Chattopadhyay
1Department of Chemistry, Burdwan University, Golapbag, West Bengal, India.
Organic Letters
|August 11, 2011
Summary
A novel fluorescent probe exhibits high selectivity for pH sensing. This sensor shows a significant fluorescence increase across a biologically relevant pH range, making it valuable for organelle studies.
Area of Science:
- Analytical Chemistry
- Biophysical Chemistry
Background:
- Developing selective fluorescent probes is crucial for real-time biological monitoring.
- Existing sensors may lack specificity or operate outside optimal biological pH ranges.
Purpose of the Study:
- To synthesize and characterize a new fluorescent probe for pH sensing.
- To evaluate the probe's performance in a biologically relevant pH range.
Main Methods:
- Synthesis of 3-[(3-benzyloxypyridin-2-ylimino)methyl]-2-hydroxy-5-methylbenzaldehyde (1-H).
- Fluorescent pH titration in Britton-Robinson buffer at 25 °C.
- Determination of pK(a) value.
Main Results:
- The probe demonstrated high selectivity as a fluorescent pH sensor.
- A 250-fold increase in fluorescence intensity was observed between pH 4.2 and 8.3.
- The determined pK(a) value was 6.63.
Conclusions:
- The new probe is a highly selective fluorescent pH sensor.
- Its operational pH range is suitable for studying biological organelles.
- This sensor offers potential for advanced biological imaging and analysis.
