Related Experiment Video
Updated: Apr 29, 2026
12:52
IridiumIII Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II
Published on: July 7, 2015
11.2K
A selectively rhodamine-based colorimetric probe for detecting copper(II) ion.
Jiangang Zhang1, Li Zhang1, Yanli Wei2
1College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China; School of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, PR China.
Summary
A new rhodamine derivative, BMSRH, acts as a colorimetric probe for detecting copper ions (Cu2+). This probe offers a quick, selective, and sensitive method for Cu2+ determination with potential environmental applications.
Area of Science:
- Chemical Sensing
- Analytical Chemistry
- Materials Science
Background:
- Rhodamine derivatives are widely used in chemical sensing.
- Developing selective and sensitive probes for metal ions is crucial for environmental monitoring.
- Copper ions (Cu2+) play vital roles in biological systems but can be toxic at high concentrations.
Purpose of the Study:
- To synthesize a novel rhodamine derivative, 3-bromo-5-methylsalicylaldehyde rhodamine B hydrazone (BMSRH).
- To develop BMSRH as a colorimetric probe for the selective and sensitive detection of Cu2+.
- To evaluate the probe's performance, including its response, selectivity, and dynamic range.
Main Methods:
- Synthesis of BMSRH via reaction of rhodamine B hydrazide with 3-bromo-5-methylsalicylaldehyde.
- Colorimetric detection of Cu2+ using UV-vis absorption spectroscopy.
- Stoichiometric and association constant determination through spectroscopic titration.
- Evaluation of selectivity against common interfering ions.
Main Results:
- BMSRH exhibited a rapid color change from colorless to red upon addition of Cu2+.
- A new absorption band at 552 nm was observed, indicating successful Cu2+ binding.
- The probe demonstrated a 1:1 binding stoichiometry with Cu2+ and an association constant of 3.2×10(4) L mol(-1).
- A linear dynamic range of 0.667–240 μmol/L for Cu2+ was established with high selectivity.
Conclusions:
- BMSRH is a highly effective colorimetric probe for selective and sensitive Cu2+ detection.
- The probe's facile synthesis and rapid response make it suitable for practical applications.
- BMSRH shows potential for environmental monitoring and other applications requiring Cu2+ determination.
