期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 25, 期 62, 页码 14230-14236出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201903478
关键词
aggregation; density functional calculations; laser spectroscopy; natural products; noncovalent interactions
Intermolecular interactions are difficult to model, especially in systems formed by multiple interactions. Such is the case of caffeine-phenol. Structural data has been extracted by using mass-resolved excitation spectroscopy and double resonance techniques. Then the predictions of seven different computational methods have been explored to discover structural and energetic discrepancies between them that may even result in different assignments of the system. The results presented herein highlight the difficulty of constructing functionals to model systems with several competing interactions, and raise awareness of problems with assignments of complex systems with limited experimental information that rely exclusively on energetic data.
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