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Résolution chirale

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Accessible Superchiral Near-Fields Driven by Tailored Electric and Magnetic Resonances in All-Dielectric Nanostructures

Hatice Altug, Andreas Tittl, Yasaman Jahani, Kosmas Tsakmakidis, Ershad Mohammadi

Detection and differentiation of enantiomers in small quantities are crucially important in many scientific fields, including biology, chemistry, and pharmacy. Chiral molecules manifest their handedness in their interaction with the chiral state of light ( ...

AMER CHEMICAL SOC2019

Interplay of H-Bonds with Aromatics in Isolated Complexes Identifies Isomeric Carbohydrates

Oleg Boyarkine, Ruslan Yamaletdinov, Vladimir Kopysov, Aleksandr Pereverzev

The tremendous isomeric diversity of carbohydrates enables a wide range of their biological functions but makes the identification and study of these molecules difficult. We investigated the ability of intermolecular interactions to communicate structural ...

Wiley-VCH Verlag GmbH2019

Subwavelength robust waveguiding with chiral metamaterial waveguides

Romain Christophe Rémy Fleury, Bakhtiyar Orazbayev, Nadège Sihame Kaïna

In this work, we design and experimentally demonstrate in the microwave range a robust metamaterial waveguide, which is formed at the boundary between two locally resonant chiral metamaterials with opposite chirality. We show that the interface states at s ...

IEEE2019

Development of Catalytic Asymmetric C-H Functionalizations with Chiral Cyclopentadienyl Iridium(III) Complexes

Yun-Suk Jang

Cp*Ir(III) catalyzed C-H functionalization is a growing field, since it provides novel complementary reactivities, but enantioselective C-H functionalization reactions with this metal remain a niche. This thesis investigates CpXIr(III) catalyzed asymmetric ...

EPFL2019

Catalytic Enantioselective α-Ketol Rearrangement

Qian Wang, Hua Wu, Jieping Zhu, Rémi Julien Sylvain Andres

A highly enantioselective a-ketol rearrangement has been developed. In the presence of a chiral Cu-bisoxazoline complex, achiral b-hydroxy-a-dicarbonyls were isomerized to chiral a-hydroxy-b-dicarbonyls and their bicyclic derivatives in excellent yields an ...

Wiley-VCH Verlag GmbH2019

Chiral Waveguides for Robust Waveguiding at the Deep Subwavelength Scale

Romain Christophe Rémy Fleury, Bakhtiyar Orazbayev, Nadège Sihame Kaïna

Routing electromagnetic energy at a scale smaller than the wavelength is a highly sought functionality in a variety of applications, including compact lightweight satellite communications, slow-waves sensors, all-optical information processing, and energy ...

American Physical Society (APS)2018

Chiral expression of adsorbed (MP) 5-amino[6] helicenes: from random structures to dense racemic crystals by surface alloying

Magalí Alejandra Lingenfelder

The chiral expression of a molecule on a surface is driven from a random solid solution on Cu(100) to a racemic crystal on a Sn/Cu(100) alloy. Density functional theory simulations reveal how the growth of the racemate is influenced by the underlying surfa ...

Royal Society of Chemistry2017

Cooperative Effects between Chiral Cp-x-Iridium(III) Catalysts and Chiral Carboxylic Acids in Enantioselective C-H Amidations of Phosphine Oxides

Nicolai Cramer, Yun-Suk Jang, Michael Christian Dieckmann

An enantioselective C-H amidation of phosphine oxides by using an iridium(III) catalyst bearing an atropchiral cyclopentadienyl (Cp-x) ligand is reported. A very strong cooperative effect between the chiral Cp-x ligand and a phthaloyl tert-leucine enabled ...

Wiley-Blackwell2017

Racemization of undesired enantiomers: Immobilization of mandelate racemase and application in a fixed bed reactor

Production of optically pure products can be based on simple unselective synthesis of racemic mixtures combined with a subsequent separation of the enantiomers; however, this approach suffers from a 50% yield limitation which can be overcome by racemizatio ...

Wiley-V C H Verlag Gmbh2016

Asymmetric Catalysis Powered by Chiral Cyclopentadienyl Ligands

Nicolai Cramer, David Kossler, Christopher Gordon Newton

Application of chiral derivatives of the versatile and ubiquitous cyclopentadienyl ligand has long remained an underdeveloped area in asymmetric catalysis. In this Perspective we highlight recent exciting results that demonstrate their enormous potential. ...

American Chemical Society2016

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