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A sensitive photoluminescent sensor based on highly charged monoruthenium(II) complexes for dopamine detection
Qingqing Wang1, Kai Zheng1, Wanqing Zhang1
1Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, State Key Laboratory of Photocatalysis on Energy and Environment, Department of Chemistry, Fuzhou University, Fuzhou 350116, PR China.
A novel ruthenium(II) complex-based sensor detects dopamine (DA) with high sensitivity and selectivity. This photoluminescent sensor offers a simple, rapid method for DA detection in biological samples.
Area of Science:
- Analytical Chemistry
- Materials Science
- Biochemistry
Background:
- Dopamine (DA) is a crucial neurotransmitter implicated in various neurological processes.
- Accurate and sensitive detection of DA is vital for diagnosing and monitoring neurological disorders.
- Existing detection methods often face challenges in selectivity and sensitivity, especially in complex biological matrices.
Purpose of the Study:
- To develop a sensitive and selective photoluminescent sensor for dopamine detection.
- To investigate the assembly of highly charged monoruthenium(II) complexes with anionic surfactants for enhanced sensing.
- To evaluate the sensor's performance, including linear range, detection limit, and selectivity.
Main Methods:
- Synthesis of novel highly charged cationic ruthenium(II) complexes.
- Assembly of ruthenium(II) complexes with sodium dodecylbenzene sulfonate (SDBS) to form a photoluminescent system.
- Photoluminescence spectroscopy to monitor the quenching effect upon dopamine addition.
- Evaluation of sensor selectivity against structurally similar compounds like adrenaline and norepinephrine.
Main Results:
- The assembled system exhibited enhanced photoluminescence intensity.
- Dopamine addition caused a significant photoluminescence quenching via an energy transfer effect.
- The sensor demonstrated a wide linear range (0.1-50 μM) and a low detection limit (10 nM).
- High selectivity for dopamine was observed, even in the presence of interfering species.
Conclusions:
- The designed photoluminescent sensor based on ruthenium(II) complexes is effective for sensitive and selective dopamine detection.
- The sensor's simple operation, obvious signal change, and fast response speed make it promising for practical applications.
- This sensor holds potential for analyzing dopamine in human urine samples, aiding in clinical diagnostics.
