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Controlled disassembling of self-assembling systems: toward artificial molecular-level devices and machines.

Abstract

Investigations on self-assembling/induced-disassembling systems have led to the design of molecular-level devices capable of performing a variety of functions. Some of the work carried out in this field is illustrated.

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BibTeXRIS

Vincenzo Balzani, Alberto Credi, Margherita Venturi. 2002-03-12. Controlled disassembling of self-assembling systems: toward artificial molecular-level devices and machines.. https://doi.org/10.1073/pnas.022631599

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Reversible 2D pseudopolyrotaxanes based on cyclodextrins and cucurbit[6]uril.

In this paper, a pseudorotaxane (2) was synthesized by reaction of cucurbit [6]uril with 6-[(6-aminohexyl)amino]-6-deoxy-beta-cyclodextrin chloride. Subsequently, pseudorotaxanes 2 were further assembled to form a 2D pseudopolyrotaxane (3) through an alpha,omega-PPG2000 diamino polymer threading the cavities of cyclodextrins in 2, and the resulting pseudopolyrotaxane was comprehensively characterized by FT-IR, NMR, TG-DTA, elemental analysis, and transmission electron microscopy. Significantly, the 2D pseudopolyrotaxane can turn into a main-chain pseudopolyrotaxane in the presence of base, and then the addition of alpha-cyclodextrins may result in a reversible switch between two different 2D pseudopolyrotaxanes.

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