Lockyer Selena J, Whitehead George F S, Timco Grigore A, McInnes Eric J L, Winpenny Richard E P
Department of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
Chemistry. 2025 Jun 26;31(36):e202501067. doi: 10.1002/chem.202501067. Epub 2025 May 30.
The extension of previous studies of heterometallic rings (HMRs) is described, including new synthetic chemistry and physics. These HMRs feature a ring of, typically, eight metal centers with a central charge-balancing cation. New HMRs and related molecules are described, varying the number of metals present. The eight metal HMRs have been used as components of larger supramolecular assembly, most often by making the HMRs into [2]rotaxanes or pseudo-rotaxanes, where the thread of the rotaxane is terminated by a binding group such as pyridine. This allows the formation of [n]rotaxanes, where n = 3, 4, 5,7, 13, or 10. Mass spectrometry and NMR studies of the HMRs have given greater understanding of the host-guest chemistry of these metal analogues of crown ethers. Physical studies have included 4D-inelastic neutron scattering (INS) and continuous wave and pulsed EPR spectroscopy to measure magnetic interactions between spin components of the supramolecular assemblies. The use of the HMRs as resists for high-resolution lithography is also discussed.
本文描述了对异金属环（HMRs）先前研究的扩展，包括新的合成化学和物理学。这些HMRs的特点是通常由八个金属中心构成一个环，并带有一个中心电荷平衡阳离子。文中描述了新的HMRs及相关分子，改变了所含金属的数量。八个金属的HMRs已被用作更大超分子组装体的组件，最常见的是将HMRs制成[2]轮烷或准轮烷，其中轮烷的线轴由吡啶等结合基团终止。这使得能够形成[n]轮烷，其中n = 3、4、5、7、13或10。对HMRs的质谱和核磁共振研究使人们对这些冠醚金属类似物的主客体化学有了更深入的了解。物理研究包括4D非弹性中子散射（INS）以及连续波和脉冲EPR光谱，以测量超分子组装体自旋组分之间的磁相互作用。文中还讨论了HMRs作为高分辨率光刻抗蚀剂的用途。
