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Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting

A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting

Published on: March 9, 2017

Developing red-emissive ruthenium(II) complex-based luminescent probes for cellular imaging.

Run Zhang¹, Zhiqiang Ye, Yuejiao Yin

¹State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, PR China.

Bioconjugate Chemistry

|March 23, 2012

Summary

Ruthenium(II) complexes were developed as luminescent probes for detecting thiophenol. The most asymmetric complex showed the highest luminescence contrast, enabling sensitive detection in living cells.

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Published on: July 7, 2015

Area of Science:

Coordination Chemistry
Photophysics
Analytical Chemistry

Background:

Ruthenium(II) complexes exhibit tunable photophysical properties for designing responsive luminescence probes.
Selective detection of biochemical analytes is crucial for diagnostics and research.

Purpose of the Study:

To develop novel Ru(II)-bipyridine complex derivatives as luminescent probes.
To achieve highly selective and sensitive detection of thiophenol in aqueous solutions and living cells.

Main Methods:

Synthesis of a series of Ru(II)-bipyridine complex derivatives: [Ru(bpy)(3-n)(DNP-bpy)(n)](PF(6))(2).
Investigation of the luminescence response upon reaction with thiophenol, triggering cleavage of the dinitrophenyl group.
Evaluation of luminescence enhancement and contrast ratios for different complex structures.

Main Results:

The complex [Ru(bpy)(DNP-bpy)(2)](2+) demonstrated a significantly enhanced on-to-off luminescence contrast ratio (37.8).
The probe exhibits high selectivity and sensitivity for thiophenol detection.
The probe is cell-membrane permeable and suitable for quantitative luminescence imaging of intracellular thiophenol.

Conclusions:

The most asymmetric Ru(II) complex structure provides the optimal luminescence probe performance.
This new probe offers a valuable tool for real-time luminescence imaging of toxic thiophenol in living cells.
The findings present a new strategy for designing advanced Ru(II) luminescence probes.