Secondary nucleation guided noncovalent synthesis of dendritic homochiral superstructures via growth on and from surface

Sai Rachana Pramatha, Dasari Srideep, Udaijit Pattnaik, Rahul Sahu, Devamrutha Ilayidathu Suresh, Aditya Chandrakant Yadav, Chinmayee Muduli, Sandeep K. Reddy, Satyaprasad P. Senanayak () and Kotagiri Venkata Rao ()
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Sai Rachana Pramatha: Indian Institute of Technology Hyderabad, Kandi
Dasari Srideep: Indian Institute of Technology Hyderabad, Kandi
Udaijit Pattnaik: Bhubaneswar, OCC of HBNI, Jatni
Rahul Sahu: Indian Institute of Technology Kharagpur
Devamrutha Ilayidathu Suresh: Bhubaneswar, OCC of HBNI, Jatni
Aditya Chandrakant Yadav: Indian Institute of Technology Hyderabad, Kandi
Chinmayee Muduli: ICAR-Central Institute of Freshwater Aquaculture
Sandeep K. Reddy: Indian Institute of Technology Kharagpur
Satyaprasad P. Senanayak: Bhubaneswar, OCC of HBNI, Jatni
Kotagiri Venkata Rao: Indian Institute of Technology Hyderabad, Kandi

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Secondary nucleation is an emerging approach for synthesizing higher-order supramolecular polymers with exciting topologies. However, a detailed understanding of growth processes and the synthesis of homochiral superstructures is yet to be demonstrated. Here, we report the non-covalent synthesis of dendritic homochiral superstructures using NIR triimide dyes as building blocks via a secondary nucleation elongation process. Detailed analysis of kinetics and temporal evolution of morphology indicates that the formation of dendritic homochiral superstructures proceeds via growth on the surface and growth from the surface of the seeds. The combination of these two processes leads to the formation of elegant homochiral superstructures with a size of ~0.4 mm2, having a superhelix at the center and helical fibres as branches. Moreover, these dendritic homochiral superstructures exhibit significantly high chiro-optical photoresponse with the magnitude of gfactor reaching a value as high as 0.55 - 0.6. Thus, our results provide insights into the growth process of homochiral superstructures with dendritic topology, which can be critically important for the design and optimization of chiral-selective optoelectronic devices leveraging controlled self-assembly.

Date: 2024
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DOI: 10.1038/s41467-024-55107-y

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