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Residual‐Chemical‐Shift‐Anisotropy‐Based Enantiodifferentiation in Lyotropic Liquid Crystalline Phases Based on Helically Chiral Polyacetylenes

Fuentes‐Monteverde, Juan Carlos ; Noll, Markus ; Das, Akhi ; Immel, Stefan ; Reggelin, Michael ; Griesinger, Christian ; Nath, Nilamoni (2024)
Residual‐Chemical‐Shift‐Anisotropy‐Based Enantiodifferentiation in Lyotropic Liquid Crystalline Phases Based on Helically Chiral Polyacetylenes.
In: Angewandte Chemie International Edition, 2023, 62 (46)
doi: 10.26083/tuprints-00027258
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Residual‐Chemical‐Shift‐Anisotropy‐Based Enantiodifferentiation in Lyotropic Liquid Crystalline Phases Based on Helically Chiral Polyacetylenes
Language: English
Date: 21 May 2024
Place of Publication: Darmstadt
Year of primary publication: 13 November 2023
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Angewandte Chemie International Edition
Volume of the journal: 62
Issue Number: 46
Collation: 8 Seiten
DOI: 10.26083/tuprints-00027258
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Anisotropic NMR spectroscopy, revealing residual dipolar couplings (RDCs) and residual chemical shift anisotropies (RCSAs) has emerged as a powerful tool to determine the configurations of synthetic and complex natural compounds. The deduction of the absolute in addition to the relative configuration is one of the primary goals in the field. Therefore, the investigation of the enantiodiscriminating capabilities of chiral alignment media becomes essential. While RDCs and RCSAs are now used for the determination of the relative configuration routinely, RCSAs have not been measured in chiral alignment media such as chiral liquid crystals. Herein, we present this application by measuring RCSAs for chiral analytes such as indanol and isopinocampheol in the lyotropic liquid crystalline phase of an L‐valine derived helically chiral polyacetylenes. We have also demonstrated that a single 1D ¹³C−{¹H} NMR spectrum suffices to get the RCSAs circumventing the necessity to acquire two spectra at two alignment conditions.

Alternative Abstract:
Alternative AbstractLanguage

The residual chemical shift anisotropy can be acquired from enantiomers employing biphasic helically chiral polyacetylene liquid crystal from a single 1D carbon spectrum. The chiral environment of the liquid crystal facilitates diastereomorphous interactions of enantiomers and leads to two different sets of RCSAs. On the basis of two chiral molecules, it has been demonstrated that enantiodiscrimination is feasible.

English
Uncontrolled Keywords: Chiral Liquid Crystals, NMR Spectroscopy, Polyacetylenes, Residual Chemical Shift Anisotropy, Enantiodiscrimination
Identification Number: Artikel-ID: e202309981
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-272582
Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry > Clemens-Schöpf-Institut > Organ Chemistry
Date Deposited: 21 May 2024 13:38
Last Modified: 23 May 2024 10:29
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/27258
PPN: 518470210
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