scholarly journals Spontaneous mirror symmetry breaking in benzil-based soft crystalline, cubic liquid crystalline and isotropic liquid phases

2020 ◽  
Vol 11 (23) ◽  
pp. 5902-5908 ◽  
Author(s):  
Tino Reppe ◽  
Silvio Poppe ◽  
Xiaoqian Cai ◽  
Yu Cao ◽  
Feng Liu ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Symmetry Breaking ◽  
Mirror Symmetry ◽  
Liquid Crystalline ◽  
Isotropic Liquid ◽  
Missing Link ◽  
Liquid Phases ◽  
Fluid Systems ◽  
Symmetry Breaking Phenomena

Achiral multi-chain benzil derivatives provide a missing link between mirror symmetry breaking phenomena in fluid systems of polycatenar and bent-core liquid crystals.

Spontaneous Mirror-Symmetry Breaking in Isotropic Liquid Phases of Photoisomerizable Achiral Molecules

2015 ◽  
Vol 128 (1) ◽  
pp. 320-324 ◽  
Author(s):  
Mohamed Alaasar ◽  
Marko Prehm ◽  
Yu Cao ◽  
Feng Liu ◽  
Carsten Tschierske
Keyword(s):  
Symmetry Breaking ◽  
Mirror Symmetry ◽  
Isotropic Liquid ◽  
Liquid Phases

Spontaneous Mirror-Symmetry Breaking in Isotropic Liquid Phases of Photoisomerizable Achiral Molecules

2015 ◽  
Vol 55 (1) ◽  
pp. 312-316 ◽  
Author(s):  
Mohamed Alaasar ◽  
Marko Prehm ◽  
Yu Cao ◽  
Feng Liu ◽  
Carsten Tschierske
Keyword(s):  
Symmetry Breaking ◽  
Mirror Symmetry ◽  
Isotropic Liquid ◽  
Liquid Phases

scholarly journals Mirror Symmetry Breaking in Liquids and Their Impact on the Development of Homochirality in Abiogenesis: Emerging Proto-RNA as Source of Biochirality?

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1098 ◽  
Author(s):  
Carsten Tschierske ◽  
Christian Dressel
Keyword(s):  
Symmetry Breaking ◽  
Mirror Symmetry ◽  
Liquid Crystalline ◽  
Dynamic Network ◽  
Stable States ◽  
Fluid Systems ◽  
Single Process ◽  
Local Mirror Symmetry ◽  
Rna Formation ◽  
Biological Chirality

Recent progress in mirror symmetry breaking and chirality amplification in isotropic liquids and liquid crystalline cubic phases of achiral molecule is reviewed and discussed with respect to its implications for the hypothesis of emergence of biological chirality. It is shown that mirror symmetry breaking takes place in fluid systems where homochiral interactions are preferred over heterochiral and a dynamic network structure leads to chirality synchronization if the enantiomerization barrier is sufficiently low, i.e., that racemization drives the development of uniform chirality. Local mirror symmetry breaking leads to conglomerate formation. Total mirror symmetry breaking requires either a proper phase transitions kinetics or minor chiral fields, leading to stochastic and deterministic homochirality, respectively, associated with an extreme chirality amplification power close to the bifurcation point. These mirror symmetry broken liquids are thermodynamically stable states and considered as possible systems in which uniform biochirality could have emerged. A model is hypothesized, which assumes the emergence of uniform chirality by chirality synchronization in dynamic “helical network fluids” followed by polymerization, fixing the chirality and leading to proto-RNA formation in a single process.

scholarly journals Y-shaped tricatenar azobenzenes – functional liquid crystals with synclinic–anticlinic transitions and spontaneous helix formation

2020 ◽  
Vol 8 (37) ◽  
pp. 12902-12916 ◽  
Author(s):  
Mohamed Alaasar ◽  
Silvio Poppe ◽  
Yu Cao ◽  
Changlong Chen ◽  
Feng Liu ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Mirror Symmetry ◽  
Liquid Crystalline ◽  
Crystalline Phases ◽  
Helix Formation ◽  
Liquid Crystalline Phases ◽  
Bicontinuous Cubic

The photoisomerizable functional azobenzene unit is organized in synclinic hexatic, anticlinic smectic and bicontinuous cubic liquid crystalline phases as well as in achiral or mirror symmetry broken isotropic network liquids.

scholarly journals Mirror symmetry breaking in fluorinated bent-core mesogens

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 82890-82899 ◽  
Author(s):  
Mohamed Alaasar ◽  
Marko Prehm ◽  
Carsten Tschierske
Keyword(s):  
Liquid Crystals ◽  
Symmetry Breaking ◽  
Mirror Symmetry

New fluorinated bent-core liquid crystals exhibiting helical nano-crystallite phases composed of chiral domains with opposite handedness and polar smcetic phases.

Controlling spontaneous mirror symmetry breaking in cubic liquid crystalline phases by the cycloaliphatic ring size

2020 ◽  
Vol 56 (5) ◽  
pp. 711-714 ◽  
Author(s):  
Tino Reppe ◽  
Christian Dressel ◽  
Silvio Poppe ◽  
Carsten Tschierske
Keyword(s):  
Symmetry Breaking ◽  
Mirror Symmetry ◽  
Liquid Crystalline ◽  
Cubic Phase ◽  
Ring Size ◽  
Crystalline Phases ◽  
Large Ring ◽  
Ring Compounds ◽  
Liquid Crystalline Phases

Achiral compounds with an alicyclic apex form a chiral cubic phase either for a specific ring-size or by mixing of small- and large-ring compounds.

scholarly journals Spontaneous mirror symmetry breaking in a re-entrant isotropic liquid

2015 ◽  
Vol 51 (87) ◽  
pp. 15850-15853 ◽  
Author(s):  
Christian Dressel ◽  
Wolfgang Weissflog ◽  
Carsten Tschierske
Keyword(s):  
Symmetry Breaking ◽  
Mirror Symmetry ◽  
Nematic Phase ◽  
Isotropic Liquid

An achiral double swallow tailed rod-like molecule forms a chirality synchronized isotropic liquid conglomerate between a chiral cubic and an achiral nematic phase.

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