The findings of the research have been published recently in the prestigious Journal Nature Communications.
Co-crystal engineering is a technique that enables the combination of compounds to enhance their functionality. These compounds find applications across diverse fields, ranging from drug development and materials science to new generation semiconductor devices and sustainable chemistry. However, the challenge in working with co-crystals is that most of the reported co-crystals are highly planar and rigid. They tend to clump together, exhibiting a behaviour called aggregation-caused quenching (ACQ) which makes it difficult to find suitable donor-acceptor pairs and applications.
A breakthrough in this evolving field has been documented through collaborative research, led by Prof Parameswar K Iyer of IIT Guwahati and scientists from the University of Hyderabad and IISc Bengaluru. The IIT Guwahati researchers have formulated four novel organic photo-functional co-crystals that can emit light efficiently with minimal loss.
Prof Parameswar K Iyer, Department of Chemistry & Centre for Nanotechnology, IIT Guwahati said, ”In our research, we engineered four luminescent Co-Crystals using a compound called Twisted Aromatic Hydrocarbons (TAH). The TAH are distorted in nature which leads to interesting electronic and optical properties. By adjusting the molecular structures, we formed a novel yet unusually highly efficient cis-isomeric co-crystal. These promising results opened unique avenues for the design and applications of TAH based co-crystals.”
Iyer further added, ”The interesting property of these co-crystals is that they easily disperse in water, hence are effectively taken up by cells, resulting in vivid cellular images. We tested the imaging application and effect of engineered fluorescent co-crystals on breast cancer cells.”This research has been funded by the Science and Engineering Research Board (SERB)-Department of Science and Technology (DST), Department of Electronics and Information Technology (DeitY), Indian Council of Medical Research (ICMR) and Max-Planck-Gesellschaft.Further, to the cancer therapy potential of these bright co-crystals, these tiny rod-shaped crystals efficiently guide light, making them promising for advanced technologies. Specifically designed, they could be essential materials for improving communication, particularly in high-speed internet via fiber-optic cables. These findings open new doors for innovative applications and technologies, marking several key milestones in the field.