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April 10, 2026The Journal of Physical Chemistry A

Rotational Spectroscopic Evidence for a π→π*(C═O) Interaction in a CO 2 –Conjugated π System

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Authors

JLJuncheng LeiXTXiao TianZCZhikai Chen

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Overview

Rotational spectroscopy reveals a π→π* interaction in a CO2-isoprene complex, suggesting new insights for material design.

Key Points

  • The aim is to investigate the intermolecular interactions between CO2 and the conjugated π system of isoprene.
  • Used pulsed-jet Fourier transform microwave spectroscopy to analyze the isoprene-CO2 complex.
  • Identified a single isomer of the complex using supersonic jet expansion.
  • Employed quantum chemical calculations to assess the nature of interactions.
  • Detected C···π contact indicating electron density donation from isoprene's π system to CO2.
  • Confirmed the existence of a π→π* noncovalent interaction.
  • Provided first direct spectroscopic evidence for CO2-involved π···π* interactions.

Cite This Study

Lei et al. (2026) studied this question.

synapsesocial.com/papers/69d8946e6c1944d70ce055cdhttps://doi.org/10.1021/acs.jpca.6c00207
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