Optical Activity at Different Length Scales: A Journey from Chiral Molecules to Chiral Nanomaterials

Giovedì 27 marzo 2023 - Ore 15:00 - Aula 20
Prof. Jatish Kumar - Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, India

Chirality is a unique geometric property observed in nature at different hierarchical scales ranging from subatomic particles through molecules to galaxies. The fundamental understanding of optical activity in molecules is of relevance to a broad community including chemistry, biology, physics and pharmacology. The field of chirality has seen a rejuvenation after the observation of optical activity in different classes of nanomaterials. Moreover, these materials have found application in the field of light emitting devices, enantioselective catalysis, and biosensing. A combination of two techniques, namely circular dichroism (CD) and circularly polarised luminescence (CPL), helps unravel the underlying mechanism of ground state and excited state chirality in these materials. The talk in addition to focussing on the chiral investigations of organic and inorganic molecular systems, will also touch upon the relevance of optical activity in nanomaterials. Nanoscale chirality in different class of materials ranging from chiral plasmonic nanomaterials to luminescent chiral carbon nanodots and metal nanoclusters will be discussed.