Calabrese Camilla, Li Weixing, Prampolini Giacomo, Evangelisti Luca, Uriarte Iciar, Cacelli Ivo, Melandri Sonia, Cocinero Emilio J
Departament of Physical Chemistry, University of the Basque Country (UPV/EHU), Barrio Sarriena, S/N, 48940, Leioa, Spain.
Biofisika Institute, (CSIC, UPV/EHU), 48080, Bilbao, Spain.
Angew Chem Int Ed Engl. 2019 Jun 17;58(25):8437-8442. doi: 10.1002/anie.201902753. Epub 2019 May 16.
Rotational spectra of several difluoromethane-water adducts have been observed using two broadband chirped-pulse Fourier-transform microwave (CP-FTMW) spectrometers. The experimental structures of (CH F )⋅⋅⋅(H O) , (CH F ) ⋅⋅⋅(H O), (CH F )⋅⋅⋅(H O) , and (CH F ) ⋅⋅⋅(H O) were unambiguously identified with the aid of 18 isotopic substituted species. A subtle competition between hydrogen, halogen, and carbon bonds is observed and a detailed analysis was performed on the complex network of non-covalent interactions which stabilize each cluster. The study shows that the combination of stabilizing contact networks is able to reinforce the interaction strength through a cooperative effect, which can lead to large stable oligomers.
使用两台宽带啁啾脉冲傅里叶变换微波（CP-FTMW）光谱仪观测了几种二氟甲烷 - 水加合物的转动光谱。借助18种同位素取代物种，明确鉴定了(CH₂F₂)⋅⋅⋅(H₂O)、(CH₂F₂)₂⋅⋅⋅(H₂O)、(CH₂F₂)₃⋅⋅⋅(H₂O)和(CH₂F₂)₄⋅⋅⋅(H₂O)的实验结构。观察到了氢、卤素和碳键之间的微妙竞争，并对稳定每个簇的非共价相互作用的复杂网络进行了详细分析。研究表明，稳定接触网络的组合能够通过协同效应增强相互作用强度，这可能导致形成大型稳定的低聚物。
