Kinetically controlled Ag+-coordinated chiral supramolecular polymerization accompanying a helical inversion.

Chemical Science
Heekyoung ChoiJong Hwa Jung

Abstract

We report kinetically controlled chiral supramolecular polymerization based on ligand-metal complex with a 3 : 2 (L : Ag+) stoichiometry accompanying a helical inversion in water. A new family of bipyridine-based ligands (d-L1, l-L1, d-L2, and d-L3) possessing hydrazine and d- or l-alanine moieties at the alkyl chain groups has been designed and synthesized. Interestingly, upon addition of AgNO3 (0.5-1.3 equiv.) to the d-L1 solution, it generated the aggregate I composed of the d-L1AgNO3 complex (d-L1 : Ag+ = 1 : 1) as the kinetic product with a spherical structure. Then, aggregate I (nanoparticle) was transformed into the aggregate II (supramolecular polymer) based on the (d-L1)3Ag2(NO3)2 complex as the thermodynamic product with a fiber structure, which led to the helical inversion from the left-handed (M-type) to the right-handed (P-type) helicity accompanying CD amplification. In contrast, the spherical aggregate I (nanoparticle) composed of the d-L1AgNO3 complex with the left-handed (M-type) helicity formed in the presence of 2.0 equiv. of AgNO3 and was not additionally changed, which indicated that it was the thermodynamic product. The chiral supramolecular polymer based on (d-L1)3Ag2(NO3)2 was produced via a nucleation-e...Continue Reading

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Citations

Mar 18, 2020·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Dinesh N NadimetlaSheshanath V Bhosale
Jul 30, 2020·Angewandte Chemie·Souvik SarkarSubi J George
Dec 9, 2020·Nature Communications·Joonsik SeoJong-Man Kim
May 20, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Jingqi ChenLingyan Feng
Jan 23, 2021·The Journal of Physical Chemistry Letters·Li YangChuanliang Feng
Oct 25, 2020·Angewandte Chemie·Zizhao HuangHe Tian
Jul 27, 2021·Journal of the American Chemical Society·Souvik SarkarSubi J George

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Methods Mentioned

BETA
circular dichroism
linear dichroism
X-ray
atomic force microscopy
AFM
dynamic light scattering

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