Friedrich-Alexander-Universität Erlangen-Nürnberg, Institut fur Organische Chemie, Erlangen, Bayern, Germany.
Nanoscale. 2023 Mar 23;15(12):5665-5670. doi: 10.1039/d2nr07166e.
In this work, we compare for the first time the stability of []cycloparaphenylene ([]CPP)-based host-guest complexes with Li@C and C in the gas and the solution phase. Our gas-phase experiments reveal a significant increase in stability for the complexes featuring [9-12]CPP with Li@C. This increased interaction strength is also observed in solution. Isothermal titration calorimetry shows for the formation of [10]CPP⊃Li@C a two orders of magnitude larger association constant than that for the C analog. Additionally, an increased binding entropy is observed. This study contributes to a better understanding of host-guest complexes between []CPPs and endohedral metallofullerenes at a molecular level, which is the prerequisite for future applications.
在这项工作中，我们首次比较了 [] 环方烷 ([]CPP) 基主客体络合物在气相和溶液相中的稳定性，与 Li@C 和 C 相比。我们的气相实验表明，具有 Li@C 的 [9-12]CPP 的络合物稳定性显著增加。这种相互作用强度的增加也在溶液中观察到。等温滴定量热法表明，对于 [10]CPP⊃Li@C 的形成，其缔合常数比 C 类似物大两个数量级。此外，观察到结合熵增加。这项研究有助于更好地理解 []CPP 和endohedral 金属富勒烯之间的主客体络合物在分子水平上的相互作用，这是未来应用的前提。
