Inside Back Cover: Surfactant Directed Synthesis of Intrinsically Chiral Plasmonic Nanostructures and Precise Tuning of their Optical Activity through Controlled Self‐Assembly (Angew. Chem. Int. Ed. 21/2023)

Abstract

A modified seed‐mediated approach using a chiral co‐surfactant as capping ligand has been developed for the synthesis of intrinsically chiral gold dog‐bone‐shaped nanoparticles. The shape anisotropy at the edges was found to play a crucial role in driving the optical activity of these nanostructures, as reported by Jatish Kumar and co‐workers in their Research Article (e202300461). The intense plasmonic chirality observed in the visible and NIR region of the electromagnetic spectrum can be of potential use in biosensing and enantioselective catalysis.

Dynamic Near‐Infrared Circularly Polarized Luminescence Encoded by Transient Supramolecular Chiral Assemblies

“…[1][2][3][4][5] Supramolecular assembly has been proven to be an efficient strategy for developing such materials because it not only generates precise and high-order structures, enabling control of intra-/intermolecular interactions and tuning of fluorescence properties, but also increases chirality at the molecular level, on the assembly scale (superhelix) and in the bulk state (film, gel), thus inducing chiroptical properties. [6][7][8][9][10] In this respect, Liu and co-workers developed helical microtoroids and constructed a light-harvesting system through hierarchically self-assembly strategy, turning on CPL signals with luminescence dissymmetry factor (g lum ) of 10 À 3 . [10] The g lum value is calculated by 2×(I L À I R )/(I L + I R ), where I L and I R are the intensity of the left-and righthanded circularly polarized emissions, respectively.…”

Probing Interactions between Chiral Plasmonic Nanoparticles and Biomolecules

“…As any other chiral object, chiral plasmonic nanomaterials lack a plane of mirror symmetry and can be obtained through various strategies. Discrete chiral nanoparticles feature patterned or twisted geometries that are intrinsically chiral, and different varieties have been synthesized by using wet chemistry, [12,17] photochemistry, [18] or other methods. [19] Chiral nanoparticle assemblies consist of two or more achiral nanoparticles arranged in a chiral configuration with overall left or right handedness, resulting in coupled chiral plasmon modes.…”

Dual emissive optically active gold nanoclusters endowed with circularly polarized phosphorescence

“…Chirality is a unique geometrical property exhibited by materials on varying length scales. 1–3 Research interest towards optically active materials has seen a surge over the years due to the direct correlation between homochirality and the origin of life. 4 Emissive materials with optically active centres possess a combination of luminescence and chirality, thus exhibiting the phenomenon of circularly polarized luminescence (CPL).…”