The molecular turnstile 1 composed of a stator based on an Sn(IV)–porphyrin bearing two sets of monodentate coordinating sites (pyridyl and benzonitrile) and a handle bearing a 2,6-pyridinediamide moiety as a tridentate unit was synthesised. In the absence of metal behaving as a blocking agent, the handle freely rotates around the stator (open state). In the presence of Pd(II), the closed state of the turnstile 1–Pd resulting from the simultaneous binding of the metal centre by both the dianionic tridentate site and one of the two pyridyl units is generated. The reaction of 1–Pd with the organometallic 2,6-diphenylpyridine Pt(II) complex 11 leads to the heterotrinuclear (Pt, Sn, Pd) species 13, resulting from the binding of the platinum complex by 1–Pd.
合成了由基于Sn(IV)–
卟啉的定子组成的分子旋转闸门1,该定子具有两组单牙配位基团(
吡啶基和苯腈)和一个带有2,6-
吡啶二酰胺基团的手柄,作为三牙基团。在没有
金属作为阻挡剂的情况下,手柄可以自由地围绕定子旋转(开放状态)。在存在Pd(II)的情况下,旋转闸门1–Pd的闭合状态由
金属中心同时与双阴离子三牙位点和两个
吡啶单元中的一个结合而产生。1–Pd与有机
金属2,6-二苯基
吡idine Pt(II)配合物11的反应导致异核三核(Pt, Sn, Pd)物种13的形成,该物种是由1–Pd与
铂配合物结合而成的。