Special Collection: Proceedings of 18th Conference on Chiroptical spectroscopy, 2022, New York

26 February 2024
26 February 2024
Special Collection: Proceedings of 18th Conference on Chiroptical spectroscopy, 2022, New York

This Special Collection comprises the Proceedings of 18th Conference on Chiroptical spectroscopy, held in NYU Center for Genomics and Systems Biology (12 Waverly Place) in New York in 2022. This Collection brings together the highlights of the conference, offering a glimpse into the cutting-edge advancements in the field of chirality science.

Table of Contents

Open Access

Spin polarization through axially chiral linkers: Length dependence and correlation with the dissymmetry factor

Spin polarization through axially chiral linkers: Length dependence and correlation with the dissymmetry factor

We established the correlation between the spin polarization observed due to the chiral induced spin selectivity (CISS) effect and the dissymmetry factor of the molecules. Hence, the manuscript provides new insight into the mechanism of the CISS effect.

DNA-induced circularly polarized luminescence of helicene racemates

DNA-induced circularly polarized luminescence of helicene racemates

One kind of the supramolecular system shows selectivity for planar and nonplanar molecules as well as azahelicenium enantiomers, leading to prominent circularly polarized luminescence performance with |glum| of close to 0.01.

Stereochemistry-activity relationship of ceramide-induced exosome production to clear amyloid-β in Alzheimer's disease

Stereochemistry-activity relationship of ceramide-induced exosome production to clear amyloid-β in Alzheimer's disease

Amyloid-β, which is believed to cause Alzheimer's disease, is cleared by exosomes. To increase exosome production, stereochemistry of the C3 position in the ceramide as a stimulant material of it must be in the R configuration.

Open Access

Enantiomeric discrimination by chiral electromagnetic resonance enhancement

Enantiomeric discrimination by chiral electromagnetic resonance enhancement

The origin of enantiomeric discrimination arising because of the interaction between gold tetrahelices and molecules with helical chirality is explained based on scattered field enhancement. Weakly scattering chiral molecules are detectable in the near vicinity of gold tetrahelices upon illumination by a plane polarized electromagnetic wave.

Can we still measure circular dichroism with circular dichroism spectrometers: The dangers of anisotropic artifacts

Can we still measure circular dichroism with circular dichroism spectrometers: The dangers of anisotropic artifacts

Approximating the exponential form of the Mueller matrix to higher-order (i.e., higher accuracy) reveals spurious contributions to circular dichroism spectra. We demonstrate that highly anisotropic samples are most susceptible to these interference effects, which, unlike LDLB effects, cannot be removed from spectra through averaging.

Open Access

Assignment of the absolute configuration of molecules that are chiral by virtue of deuterium substitution using chiral tag molecular rotational resonance spectroscopy

Assignment of the absolute configuration of molecules that are chiral by virtue of deuterium substitution using chiral tag molecular rotational resonance spectroscopy

Molecules that are chiral by virtue of deuterium substitution are often prepared by precision deuteration chemistry. A new method to establish the absolute configuration of these enantioisotopomers by chiral tag rotational spectroscopy is described.

On the choice of coordinate origin in length gauge optical rotation calculations

On the choice of coordinate origin in length gauge optical rotation calculations

This work finds the best coordinate origin for length gauge optical rotation calculations. We propose a straightforward procedure to find this coordinate origin, and we show that this choice is transferable across levels of theory.

Comparative rotatory power of bent and twisted polyynes

Comparative rotatory power of bent and twisted polyynes

What kinds of distortions of a linear chromophore are most generative of optical activity? It is shown that bending, a decidedly achiral, in-plane deformation, is strongly generative of gyration in oriented structures whereas the subsequent introduction of helical twisting serves only to diminish the initial response.

Isolated and solvated chiroptical behavior in conformationally flexible butanamines

Isolated and solvated chiroptical behavior in conformationally flexible butanamines

The dispersive optical activity of two flexible aliphatic amines was measured under isolated and solvated conditions with variants of the independent-conformer ansatz used to interpret findings. Although reasonable vapor-phase predictions of ensemble-averaged response were possible, poor simulations of solution-phase behavior were attributed to a putative breakdown of the isolated-conformer premise.

Open Access

Development of robust chiroptical systems through spirobifluorenes

Development of robust chiroptical systems through spirobifluorenes

Chiral spirobifluorenes (SBFs) can be used to create chiroptical systems with high thermal stability and chiroptical responses. Some recent examples are as follows: SBFs with metal-containing aromatic rings, tetracyanobutadiene SBFs, SBFs with tunable spiroconjugation, all-carbon double helices, flexible shape-persistent macrocycles, and macrocycles presenting helical molecular orbitals.