Rotaxane nanomachines in future molecular electronics

Abstract

As the electronics industry is integrating more and more new molecules to utilize them in the logic circuits and memories to achieve ultra-high efficiency and device density, many organic structures...

Artificial molecular machines: Design and observation

“…As the electronics industry is integrating more and more new molecules to utilize them in logic circuits and memories to achieve ultra-high efficiency and device density, many organic structures emerged as promising candidates either in conjunction with or as an alternative to conventional semiconducting materials such as but not limited to silicon. [124,125] Due to the different stimulus responses of molecular machines, they could be excellent molecular electronics [126] and memory materials. [127] Molecular machines resulted in two stable molecular configurations under external stimuli, known as the "on" and "off" states of the controllable switch with distinct resistances.…”

The Role of Dethreading Process in Pseudorotaxanes and Rotaxanes towards Advanced Applications: Recent Examples

“…Mechanically interlocked molecules (MIMs) are a type of compounds constituted by components which are bonded together through noncovalent interactions, forming a mechanical bond. [1][2][3] Within the range of intertwined compounds, rotaxanes are postulated as ideal candidates for the design of molecular machines, developing applications in a wide range of fields, [4][5][6] such as catalysis, [7][8][9][10][11][12][13][14] materials science [15][16][17][18][19][20][21][22][23][24] or medicinal chemistry. [25][26][27] Usually, the design of these structures seeks the stability of the mechanical bond, thus preventing the dissociation of the different components in order to carry out a specific function.…”

“…Mechanically interlocked molecules (MIMs) are a type of compounds constituted by components which are bonded together through noncovalent interactions, forming a mechanical bond [1–3] . Within the range of intertwined compounds, rotaxanes are postulated as ideal candidates for the design of molecular machines, developing applications in a wide range of fields, [4–6] such as catalysis, [7–14] materials science [15–24] or medicinal chemistry [25–27] …”

Crown Ether Active Template Synthesis of Rotaxanes**

“…This makes rotaxanes a useful class of molecules and has enabled their application as pumps, [3] switchable catalysts [4] and electronic components. [5] Crown ethers are one of the most commonly found macrocycles in rotaxanes. This is primarily because they form strong complexes, pseudo-rotaxanes, by hydrogen bonding/π stacking to templates containing a variety of functional groups, including secondary ammonium, urea, pyridinium and amidinium.…”

“…Whilst the constituent components of a rotaxane cannot be separated without breaking a covalent bond, their relative positions can be controlled using a range of stimuli. This makes rotaxanes a useful class of molecules and has enabled their application as pumps, [3] switchable catalysts [4] and electronic components [5] …”