Phosphorescent chemosensor for Hg2+ and acetonitrile based on iridium(III) complex

Area of Science:

• Coordination Chemistry
• Materials Science
• Analytical Chemistry

Background:

• Iridium(III) complexes are valuable in developing advanced chemosensors.
• Selective detection of metal ions and organic molecules remains a challenge.

Purpose of the Study:

• To synthesize and characterize a new iridium(III) complex, Ir(dpp)2(dtc) (Ir1), for sensing applications.
• To investigate the potential of Ir1 as a phosphorescent chemosensor for mercury ions (Hg2+) and acetonitrile (MeCN).

Main Methods:

• Synthesis and characterization of the iridium(III) complex Ir1.
• Spectroscopic analysis (fluorescence and colorimetric) of Ir1 in the presence of Hg2+ and MeCN.
• Evaluation of Ir1 as a logic gate sensor.

Main Results:

• Ir1 exhibited a visual color change and significant fluorescence quenching upon addition of Hg2+ in dichloromethane (DCM).
• A new fluorescent emission was observed when MeCN was added to the Ir1 solution, indicating selective MeCN sensing.
• The complex Ir1 demonstrated AND logic gate behavior with Hg2+ and MeCN as inputs.

Conclusions:

• The iridium(III) complex Ir1 is a versatile phosphorescent chemosensor for both Hg2+ and MeCN.
• Ir1 shows potential for developing advanced molecular logic systems.
• This study highlights the utility of iridium(III) complexes in creating multifunctional sensing materials.