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Handedness Inversion in Preparing Chiral 4, 4(')-biphenylene-silica Nanostructures

Handedness Inversion in Preparing Chiral 4, 4(')-biphenylene-silica Nanostructures

Yi Li, Hairui Wang, Liwen Wang, Feng Zhou, Yuanli Chen, Baozong Li, Yonggang Yang

Nanotechnology. 2011 Apr 1;22(13):135605.

PMID: 21343637

Abstract:

An anionic gelator, D-C12ValC10COONa, derived from D-valine can cause physical gels in water and organic solvents. Helical 4,4(')-biphenylene-silica nanotubes and nanoribbons were prepared using it with 3-aminopropyltrimethoxysilane as a co-structure-directing agent and 4,4(')-bis(triethoxysilyl)-1,1(')-biphenyl (BTESB) as precursor. It was found that the handedness of the hybrid silica nanotubes/nanoribbons is sensitive to the pH value and the concentration of the reaction mixtures. However, handedness inversion was not found by changing the reaction temperature. Circular dichroism spectra of the 4,4(')-biphenylene-silica nanotubes indicated that the chirality of the organic self-assemblies were successfully transferred to the twist of the biphenylene rings through the co-structure-directing agent. The handedness of the 4,4(')-biphenylene rings was also tunable by changing the pH value and the concentration of the reaction mixtures. The FESEM images and CD spectra taken after different reaction times indicated that the handedness inversion occurred after adding BTESB.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP123640937	4,4′-Bis(triethoxysilyl)-1,1′-biphenyl		123640-93-7	Price

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