作者:Mantosh K. Sinha、Ofer Reany、Maayan Yefet、Mark Botoshansky、Ehud Keinan
DOI:10.1002/chem.201103434
日期:2012.4.27
Bistable rotaxanes are important design elements of molecular devices for a broad range of applications, such as controlled drug release, molecular rotary motors, and chemical sensors. The host–guest complexes of cucurbit[6]uril and 1,4‐bis(alkylaminomethyl)benzene were found to exhibit two stable binding modes with an unexpectedly high barrier between them. Their structural and dynamic properties
双稳态轮烷是分子装置的重要设计元素,具有广泛的应用,例如受控药物释放、分子旋转马达和化学传感器。葫芦[6]脲和1,4-双(烷基氨基甲基)苯的主客体配合物表现出两种稳定的结合模式,它们之间的势垒出乎意料地高。通过 NMR 光谱、X 射线晶体学和等温滴定微量热法发现了它们的结构和动态特性、动力学和热力学参数,以及对叠氮化物-炔烃 [3+2] 环加成反应(点击化学)的不同化学反应性。发现在室温下形成的高度稳定的 2:1 复合物是一种动力学产物,在长时间加热至 100°C 后可转化为热力学 1:1 复合物。