AI Article Synopsis
- A new type of [2]rotaxane is developed that features a zinc(II) metalloporphyrin axle and a special macrocycle, which can effectively recognize and sense lithium halide ion pairs through optical methods.
- Research using H NMR and UV-visible absorption indicates that the interaction between the macrocycle and the zinc(II) axle leads to a significant change in the rotaxane's structure.
- Titration experiments reveal that when lithium halide pairs bind to the system, they disrupt the mechanical bond, allowing the macrocycle to move and enhance the recognition and sensing capabilities of lithium halide salts.
Article Abstract
A dynamic zinc(II) metalloporphyrin axle-containing [2]rotaxane with a heteroditopic macrocycle component is shown to selectively recognise and optically sense lithium halide (LiX) ion-pair species. H NMR and UV-visible absorption experiments demonstrate a strong macrocycle pyridyl⋯Zn(II) metalloporphyrin axle interaction which results in a marked co-conformational bias in the free [2]rotaxane host system. Extensive H NMR cation, anion and ion-pair titration experiments demonstrate the binding of lithium halide ion-pairs disrupts the inter-component mechanical bond interaction, wherein dynamic macrocycle shuttling to an axle triazole station enables co-operative axle-separated LiX ion-pair recognition and the selective optical sensing of lithium halide salts.
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| http://dx.doi.org/10.1039/d4dt03026e | DOI Listing |
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