Chiral‐Solvent‐Mediated Manganese‐Based Hierarchical Supraparticles with Chiroptical Activity. Issue 42 (15th September 2022)

• Record Type: Journal Article
• Authors: Zhang, Hongyu; Hao, Changlong; Xu, Liguang; Xu, Chuanlai; Kuang, Hua
• Is Part Of: Small. Volume 18:Issue 42(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-15
• Subjects: chiroptical activity -- hierarchical structures -- manganese -- solvent‐mediated -- supraparticles; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202202741
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: In this study, manganese‐based multiply hierarchical chiral supraparticles (SPs), with an anisotropy factor ( g ‐factor) of 0.102 and circular dichroism (CD) intensity of 260 mdeg at 530 nm, are successfully synthesized with polar‐solvent‐mediated strategies. Notably, the g ‐factor of the SPs is further enhanced to 0.121 by the addition of an external chiral solvent, generating a chiral biased environment, which increases their CD intensity to 320 mdeg at 500 nm. The mechanism underlying the different chirality is proposed to be a difference in the angle of tilt of ±33° between the two enantiomers of the chiral SPs, which involves a difference of ±7° between the orientation of individual nanoplatelets. Chiral solvents induce the angle between adjacent nanoplatelets to get smaller than the original structure that leads to their higher anisotropic value. These findings potentially provide a practical method for the construction of complex chiral superstructures and the regulation of chiroptical activity. Abstract : The solvent‐mediated Mn‐based hierarchical chiral architectures are fabricated. It is found that the developed organic‐solvent‐driven self‐assembly pathways for metal chiral ligand complexes provide an avenue for the design of multiple hierarchical structures with high optical activity.