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Journal Article

High-Resolution Rotational Spectroscopy Study of the Smallest Sugar Dimer: Interplay of Hydrogen Bonds in the Glycolaldehyde Dimer

MPS-Authors
/persons/resource/persons140385

Zinn,  Sabrina
Structure and Dynamics of Cold and Controlled Molecules, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany);

/persons/resource/persons140381

Betz,  Thomas
Structure and Dynamics of Cold and Controlled Molecules, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany);

/persons/resource/persons22077

Schnell,  Melanie
Structure and Dynamics of Cold and Controlled Molecules, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany);

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http://dx.doi.org/10.1002/anie.201511077
(Publisher version)

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Citation

Zinn, S., Medcraft, C., Betz, T., & Schnell, M. (2016). High-Resolution Rotational Spectroscopy Study of the Smallest Sugar Dimer: Interplay of Hydrogen Bonds in the Glycolaldehyde Dimer. Angewandte Chemie International Edition, 55(20), 5975-5980. doi:10.1002/anie.201511077.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-3E05-4
Abstract
Molecular recognition of carbohydrates plays an important role in nature. The aggregation of the smallest sugar, glycolaldehyde, was studied in a conformer-selective manner using high-resolution rotational spectroscopy. Two different dimer structures were observed. The most stable conformer reveals C2-symmetry by forming two intermolecular hydrogen bonds, giving up the strong intramolecular hydrogen bonds of the monomers and thus showing high hydrogen bond selectivity. By analyzing the spectra of the 13C and 18O isotopologues of the dimer in natural abundance, we could precisely determine the heavy backbone structure of the dimer. Comparison to the monomer structure and the complex with water provides insight into intermolecular interactions. Despite hydrogen bonding being the dominant interaction, precise predictions from quantum-chemical calculations highly rely on the consideration of dispersion.