التفاصيل البيبلوغرافية
| العنوان: |
Template Assisted Synthesis of Linear [5]Catenane by Post‐Functionalization of Templated [2]Catenane and Using Click Reaction. |
| المؤلفون: |
Podh, Mana Bhanjan, Ratha, Radhakrishna, Purohit, Chandra Shekhar |
| المصدر: |
Chemistry - An Asian Journal; 7/2/2024, Vol. 19 Issue 13, p1-10, 10p |
| مصطلحات موضوعية: |
POLYMER blends, MASS spectrometry, ROTAXANES, METAL ions, MOLECULAR weights, DEGREES of freedom, DIAMIDES, OLIGOMERS |
| مستخلص: |
Polymers with all mechanically interlocked rings, such as linear [n]catenanes, have great potential as functional materials due to possible higher degrees of freedom that may contribute to their flexibility but remain elusive. All the synthetic methods used to prepare such a polymer yield mixtures of products. In the absence of higher molecular weight linear [n]catenanes, emphasis on synthesizing low molecular weight oligomers is being pursued. Here, we have described the synthesis of a linear [5]catenane by post‐functionalizing a Co(III) templated [2]catenane having a pyridine‐diamide unit free for further metal ion coordination. Two molecules were synthesized with suitable threading groups: one, two terminal azide groups, and two, with two terminal alkyne groups to form two [3]pseudorotaxane utilizing Co(III) coordination. These units were then joined, forming a macrocycle, using click reaction, giving the desired metalated linear [5]catenane in 40 % yield. Removal of metal ions leads to linear [5]catenane. In addition, the formation of linear [3] and [2]catenane are also observed. All synthesized structures have been isolated by column chromatographic technique and characterized by 1H‐NMR, 13C‐NMR, and mass spectroscopy. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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