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Enantiospecific Response in Cross-Polarization Solid-State Nuclear Magnetic Resonance of Optically Active Metal Organic Frameworks

San Sebastian, Eider ; Cepeda, Javier ; Huizi-Rayo, Uxua ; Terenzi, Alessio ; Finkelstein-Shapiro, Daniel LU ; Padro, Daniel ; Santos, Jose Ignacio ; Matxain, Jon M. ; Ugalde, Jesus M. and Mujica, Vladimiro (2020) In Journal of the American Chemical Society 142(42). p.17989-17996
Abstract

We report herein on a NMR-based enantiospecific response for a family of optically active metal-organic frameworks. Cross-polarization of the 1H-13C couple was performed, and the intensities of the 13C nuclei NMR signals were measured to be different for the two enantiomers. In a direct-pulse experiment, which prevents cross-polarization, the intensity difference of the 13C NMR signals of the two nanostructured enantiomers vanished. This result is due to changes of the nuclear spin relaxation times due to the electron spin spatial asymmetry induced by chemical bond polarization involving a chiral center. These experiments put forward on firm ground that the chiral-induced spin selectivity effect, which induces chemical bond polarization... (More)

We report herein on a NMR-based enantiospecific response for a family of optically active metal-organic frameworks. Cross-polarization of the 1H-13C couple was performed, and the intensities of the 13C nuclei NMR signals were measured to be different for the two enantiomers. In a direct-pulse experiment, which prevents cross-polarization, the intensity difference of the 13C NMR signals of the two nanostructured enantiomers vanished. This result is due to changes of the nuclear spin relaxation times due to the electron spin spatial asymmetry induced by chemical bond polarization involving a chiral center. These experiments put forward on firm ground that the chiral-induced spin selectivity effect, which induces chemical bond polarization in the J-coupling, is the mechanism responsible for the enantiospecific response. The implications of this finding for the theory of this molecular electron spin polarization effect and the development of quantum biosensing and quantum storage devices are discussed.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the American Chemical Society
volume
142
issue
42
pages
8 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85094220294
  • pmid:32941015
ISSN
1520-5126
DOI
10.1021/jacs.0c04537
language
English
LU publication?
yes
id
5616a547-522f-4fff-957a-da1de5f9c221
date added to LUP
2020-11-06 07:59:41
date last changed
2024-09-19 08:30:09
@article{5616a547-522f-4fff-957a-da1de5f9c221,
  abstract     = {{<p>We report herein on a NMR-based enantiospecific response for a family of optically active metal-organic frameworks. Cross-polarization of the 1H-13C couple was performed, and the intensities of the 13C nuclei NMR signals were measured to be different for the two enantiomers. In a direct-pulse experiment, which prevents cross-polarization, the intensity difference of the 13C NMR signals of the two nanostructured enantiomers vanished. This result is due to changes of the nuclear spin relaxation times due to the electron spin spatial asymmetry induced by chemical bond polarization involving a chiral center. These experiments put forward on firm ground that the chiral-induced spin selectivity effect, which induces chemical bond polarization in the J-coupling, is the mechanism responsible for the enantiospecific response. The implications of this finding for the theory of this molecular electron spin polarization effect and the development of quantum biosensing and quantum storage devices are discussed.</p>}},
  author       = {{San Sebastian, Eider and Cepeda, Javier and Huizi-Rayo, Uxua and Terenzi, Alessio and Finkelstein-Shapiro, Daniel and Padro, Daniel and Santos, Jose Ignacio and Matxain, Jon M. and Ugalde, Jesus M. and Mujica, Vladimiro}},
  issn         = {{1520-5126}},
  language     = {{eng}},
  number       = {{42}},
  pages        = {{17989--17996}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of the American Chemical Society}},
  title        = {{Enantiospecific Response in Cross-Polarization Solid-State Nuclear Magnetic Resonance of Optically Active Metal Organic Frameworks}},
  url          = {{http://dx.doi.org/10.1021/jacs.0c04537}},
  doi          = {{10.1021/jacs.0c04537}},
  volume       = {{142}},
  year         = {{2020}},
}