Chirality hierarchical transfer in homochiral polymer crystallization under high-pressure CO2

Lei Zhang, Guoqun Zhao (), Zhiping Chen and Xianhang Yan
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Lei Zhang: Shandong University
Guoqun Zhao: Shandong University
Zhiping Chen: Shandong University
Xianhang Yan: Shandong University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Ordered phase transitions are commonly correlated to symmetry breaking, while disordered phase transitions are characterized by symmetry restoration. Nevertheless, this study demonstrates that these correlation relations are not always applicable in chiral polymers under high-pressure Carbon Dioxide. Without racemization, homochiral Poly (lactide acid) can generate two vortex-shaped dendritic crystals with opposite spiral chirality, and snowflake-shaped dendritic crystals without spiral chirality. The transition from homochiral molecules to achiral crystals signifies the chiral symmetry restoration during the ordering process. The primary elements responsible for the various hierarchical transfers of homochiral Poly (lactide acid) are related to chain tilt, surface stress, and frustrated structures of Poly (lactide acid) crystals. Here, we show the entropy impact of Carbon Dioxide can be utilized to programmatically regulate the morphological chirality of crystal superstructure and crystal form of homochiral Poly (lactide acid).

Date: 2024
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DOI: 10.1038/s41467-024-51292-y

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