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Updated: Aug 6, 2026
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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Sensing Synthon Architectures with Hyperfine-Resolved Rotational Spectroscopy
Nuno M Campos1, Rita J C Roque1, Tiddo J Mooibroek2
1CFisUC, Department of Physics, University of Coimbra, Rua Larga, Coimbra3004-516, Portugal.
Journal of the American Chemical Society
|July 20, 2026
Summary
Electric field gradients at nitrogen nuclei precisely reveal molecular arrangements in supramolecular complexes. This method uses nuclear quadrupole splittings to identify docking geometries of tetracyanocyclopropane (TCCP) derivatives, advancing the design of novel materials.
Area of Science:
- Supramolecular chemistry
- Chemical physics
- Materials science
Background:
- Supramolecular synthons enable programmable molecular architectures through noncovalent carbon bonding.
- Experimental determination of precise docking geometries in these systems remains challenging.
Purpose of the Study:
- To demonstrate electric field gradients at nitrogen nuclei as a sensitive probe for supramolecular topology.
- To investigate the docking geometry of tetracyanocyclopropane (TCCP) complexes using advanced spectroscopic techniques.
Main Methods:
- Utilized hyperfine-resolved broadband rotational spectroscopy in a supersonic jet expansion.
- Performed quantum-chemical calculations to complement experimental data.
- Employed nuclear quadrupole splittings to measure electric field gradients at nitrogen nuclei.
Main Results:
- Observed complexes of TCCP derivatives with tetrahydrofuran, featuring tetrel bonds.
- Demonstrated that nitrogen nuclear quadrupole coupling constants uniquely define complex orientation.
- Successfully extracted precise rotational parameters to determine docking arrangements of TCCP derivatives.
Conclusions:
- Nitrogen electric field gradients are powerful structural sensors for noncovalent interactions.
- Hyperfine-resolved rotational spectroscopy offers a configuration-sensitive approach for identifying supramolecular synthons.
- This technique can guide the design of advanced nitrogen-rich supramolecular materials.
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