Luminescent mechanochromic porous coordination polymers

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Solid-State Chemistry

Background:

• Porous coordination polymers (PCPs) offer tunable structures for diverse applications.
• Luminescent materials are crucial for sensing and optoelectronic devices.
• Mechanochromism, the change in optical properties upon mechanical stimuli, is an emerging area in materials science.

Purpose of the Study:

• To synthesize and characterize novel 2D luminescent isomeric porous coordination polymers.
• To investigate the mechanochromic behavior of these synthesized materials.
• To elucidate the underlying mechanisms responsible for the observed mechanochromic properties.

Main Methods:

• Synthesis of three distinct 2D luminescent isomeric porous coordination polymers.
• Characterization using techniques such as X-ray diffraction and spectroscopy.
• Mechanical testing involving grinding to assess changes in luminescence.

Main Results:

• Successful synthesis of three target 2D luminescent isomeric porous coordination polymers.
• Demonstration of tunable luminescence properties upon mechanical grinding.
• Identification of cuprophilicity and π-π interactions as likely contributors to mechanochromism.

Conclusions:

• The synthesized isomeric porous coordination polymers exhibit significant mechanochromic responses.
• Mechanical force can effectively modulate the luminescent output of these materials.
• Weak intermolecular interactions play a key role in governing the mechanochromic behavior of these coordination polymers.