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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Self-assembly of triangular metallomacrocycles using unsymmetrical bisterpyridine ligands: isomer differentiation via TWIM mass spectrometry
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Self-assembly of triangular metallomacrocycles using unsymmetrical bisterpyridine ligands: isomer differentiation via TWIM mass spectrometry

机译：使用不对称的二吡啶吡啶配体自组装三角形金属大环：通过TWIM质谱进行异构体区分

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摘要

Three unsymmetrical, 60 degrees-bended bisterpyridine ligands with varying phenylene spacer lengths have been synthesized via the Suzuki-Miyaura coupling reactions. Their self-assembly processes were found to be strongly dependent on the ligand geometry. Upon complexation with Zn-II ions, only 2,4 ''-di(4'-terpyridinyl)- 1,1':4',1 ''-terphenyl underwent self-selection to give a trinuclear metallomacrocycle with perfect heteroleptic connectivity and the other two afforded a mixture of constitutional isomers. The metallosupramolecular assemblies were characterized by NMR spectroscopy, electrospray mass spectrometry (ESI MS), and single-crystal X-ray diffraction. In particular, the identification of isomeric architecture was accomplished using tandem mass spectrometry (MS2) coupled with traveling wave ion mobility mass spectrometry (TWIM MS).
机译：通过Suzuki-Miyaura偶联反应合成了三个不对称的，60度弯曲的二苯并吡啶配体，它们具有不同的亚苯基间隔基长度。发现它们的自组装过程强烈依赖于配体的几何形状。与Zn-II离子络合后，仅进行2,4''-二（4'-叔吡啶基）-1,1'：4'，1''-三联苯进行自我选择，从而得到具有完美的杂配连接性的三核金属大环。另外两个提供了结构异构体的混合物。通过NMR光谱，电喷雾质谱（ESI MS）和单晶X射线衍射对金属超分子组装体进行表征。特别是，使用串联质谱（MS2）和行波离子迁移率质谱（TWIM MS）进行异构体结构鉴定。

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