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Simulations of p-tert-butylcalix[4]arene with multiple occupancies of small guest molecules

机译:多位小客体分子对叔叔丁基杯[4]芳烃的模拟

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Classical molecular dynamics simulations were used to study low-density beta(0)-phase p-tert-butylcalix[4]arene inclusion compounds with multiple calix occupancies of xenon, carbon dioxide, methane, and hydrogen guest molecules with guest-host ratios ranging from 1:4 to 4: 1. Custom parameterized force fields were used for the guests and the AMBER force field for the calixarene units was validated in our previous work (Chem. Eur. J 2006, 12, 5231). The inclusion energy and unit cell volume of the calixarene inclusion compound were determined for various guest occupancies and for occupancies greater than 1:1, strong guest-guest interaction effects are observed. The structure and energetics of the 2:1 CO2/beta(0)-phase inclusion compound were compared to those of the low-temperature 2:1 CO2/calixarene in which the guest molecules occupy both cage and interstitial sites.
机译:经典的分子动力学模拟用于研究低密度β(0)相对叔丁基杯杯[4]芳烃夹杂物,其氙气,二氧化碳,甲烷和氢客气分子的居里比多,从1:4到4:1.来宾使用了自定义的参数化力场,而杯形芳烃装置的AMBER力场在我们以前的工作中得到了验证(Chem。Eur。J 2006,12,5231)。确定了杯形芳烃包合物的包合能和单位细胞体积,用于各种宾客占有率,并且对于大于1:1的占有率,观察到了强烈的客客相互作用。比较了2:1 CO2 /β(0)相夹杂物的结构和能量,与其中客体分子同时占据笼形和间隙位点的低温2:1 CO2 /杯芳烃的结构和能量。

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