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Host-guest Properties of Pagoda[4]arene with α,ω-Dibromoalkanes and Their Self-assembled Linear Supramolecular Polymer Driven by Guest Halogen–halogen Interactions by Nour O. Abdeljaber; Mickey Vinodh; Talal F. Al-Azemi is a Chemistry article available to read on EtoBox.

What is Host-guest Properties of Pagoda[4]arene with α,ω-Dibromoalkanes and Their Self-assembled Linear Supramolecular Polymer Driven by Guest Halogen–halogen Interactions about?

Herein we report the host-guest interactions of pagoda[4]arene with various α,ω-dibromoalkanes. The guest encapsulation properties were probed by 1H NMR titration and isothermal titration calorimetry (ITC) experiments. Unlike pillararenes, the deeper cavity of pagoda[4]arene shows higher affinity toward longer straight-chain molecules with 1:1 host-to-guest stochiometric ratio of complexation. In addition, the formation of the self-assembled supramolecular polymer driven by guest halogen-halogen interactions in solution was demonstrated by diffusion-ordered spectroscopy (DOSY), ITC, and dynamic light scattering (DLS) measurements. From the ITC dilution experiments, we found that the supramolecular polymer dissociation process is mainly entropically driven (TΔS = 64.00 kJ mol−1) and enthalpically disfavored (ΔH = 43.91 kJ mol−1).

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Author

Nour O. Abdeljaber; Mickey Vinodh; Talal F. Al-Azemi

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)