General Synthesis of Chiral Mesostructured Carbonates Using Chiral Vicinal Polyhydroxy Molecules.

Area of Science:

• Inorganic Chemistry
• Materials Science
• Chirality Studies

Background:

• Integrating chirality into inorganic materials offers significant application potential but faces challenges in general synthesis and achieving high optical activity.
• Biomineralization principles inspire novel approaches for creating chiral inorganic structures.

Purpose of the Study:

• To develop a general synthetic method for producing chiral inorganic carbonates.
• To achieve high optical activity in synthesized chiral carbonates.
• To investigate the mechanism of chirality transfer and optical response enhancement.

Main Methods:

• A hydrothermal synthesis method utilizing chiral vicinal polyhydroxy molecules (CVPMs) was employed.
• The method was applied to synthesize various carbonates including CaCO3, BaCO3, SrCO3, MnCO3, and CdCO3.
• Structural analyses, including circular dichroism (CD) spectroscopy, were used to characterize the chiral properties.

Main Results:

• Chiral mesostructured carbonates were successfully synthesized, exhibiting pronounced circular dichroism (CD) in the UV-Vis regions.
• The dissymmetry factor (g-factor) for MnCO3 and CdCO3 reached as high as 10^-2.
• CVPMs played a dual role as symmetry-breaking agents and in-situ carbonate sources, enhancing chirality transfer.
• Multilevel hierarchical chirality and lattice distortions were observed, influenced by CVPMs and crystallization kinetics.

Conclusions:

• The developed hydrothermal method offers a versatile strategy for synthesizing chiral carbonates with enhanced optical properties.
• The findings provide insights into chirality regulation mechanisms in inorganic materials.
• This approach expands the possibilities for designing advanced chiral inorganic materials.