Acid-Activated Motion Switching of DB24C8 between Two Discrete Platinum(II) Metallacycles.

• 影响指数: 4.927
• 发表时间: Jan 2021 30
• 来源期刊: Molecules
• DOI: 10.3390/molecules26030716
• PMID: 33573149
• 文章类型: Journal Article
• 中科院分区: Q3
• 作者列表: Hu YX,Wu GY,Wang XQ,Yin GQ,Zhang CW,Li X,Xu L,Yang HB

关键词: host–guest interaction; metallacycle; molecular motion; pseudorotaxanes; self-sorting

Mesh: Coordination Complexes / chemical synthesis chemistry; Crown Ethers / chemistry; Molecular Structure; Organoplatinum Compounds / chemical synthesis chemistry; Platinum / chemistry; Polymers / chemical synthesis chemistry; Rotaxanes / chemical synthesis chemistry; Trifluoroacetic Acid / chemistry

Abstract

The precise operation of molecular motion for constructing complicated mechanically interlocked molecules has received considerable attention and is still an energetic field of supramolecular chemistry. Herein, we reported the construction of two tris[2]pseudorotaxanes metallacycles with acid-base controllable molecular motion through self-sorting strategy and host-guest interaction. Firstly, two hexagonal Pt(II) metallacycles M1 and M2 decorated with different host-guest recognition sites have been constructed via coordination-driven self-assembly strategy. The binding of metallacycles M1 and M2 with dibenzo-24-crown-8 (DB24C8) to form tris[2]pseudorotaxanes complexes TPRM1 and TPRM2 have been investigated. Furthermore, by taking advantage of the strong binding affinity between the protonated metallacycle M2 and DB24C8, the addition of trifluoroacetic acid (TFA) as a stimulus successfully induces an acid-activated motion switching of DB24C8 between the discrete metallacycles M1 and M2. This research not only affords a highly efficient way to construct stimuli-responsive smart supramolecular systems but also offers prospects for precisely control multicomponent cooperative motion.