Molecular Devices: Molecular Machinery

Zhang, Mingming; Zhu, Kelong; Huang, Feihe

doi:10.1002/9780470661345.smc092

Cited by 3 publications

(3 citation statements)

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“…All of the above examples involving templated syntheses of rotaxanes are derived from hydrogen bonding, π–π stacking, hydrophobic, and/or charge-transfer interactions. In the development of MIMs, metal templated synthesis is also a very powerful strategy. − Macrocycle 160 containing 1,10-disubstituted phenanthroline ligands was designed by Gibson and co-workers (Scheme ) . Metal ions such as copper ion serve as a bridge to connect the macrocycle and a linear molecule 161 also containing 1,10-disubstituted phenanthroline unit together, resulting in the formation of a [2]pseudorotaxane 162 .…”

Section: Synthesis Of Rotaxanes Based On Various Macrocyclesmentioning

confidence: 99%

Development of Pseudorotaxanes and Rotaxanes: From Synthesis to Stimuli-Responsive Motions to Applications

et al. 2015

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Introduction 7399 2. Synthesis of Rotaxanes Based on Various Macrocycles 7400 2.1. Crown Ethers 7401 2.1.1. Bis(m-phenylene)-32-crown-10 and Crown Ethers with Larger Sizes 7401 2.1.2. Dibenzo-24-crown-8 7402 2.1.3. Benzo-21-crown-7 7406 2.1.4. Crown Ether-Based Cryptands 7407 2.2. Cyclodextrins 7410 2.3. Cucurbiturils 7413 2.3.1. Cucurbit[6]uril 7413 2.3.2. Cucurbit[7]uril 7414 2.3.3. Cucurbit[8]uril 7415 2.4. Calixarenes 7416 2.4.1. Calix[4]arenes as Linkers or Stoppers 7416 2.4.2. Calix[5]arenes and Calix[6]arenes as Wheels 7416 2.4.3. Heterocalix[n]arenes or Calix[n]heteroarenes 7417 2.5. Pillararenes 7418 2.5.1.

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Section: Synthesis Of Rotaxanes Based On Various Macrocyclesmentioning

confidence: 99%

Development of Pseudorotaxanes and Rotaxanes: From Synthesis to Stimuli-Responsive Motions to Applications

et al. 2015

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“…[9][10][11] Carbohelicenes and their derivatives, serving in molecular devices as molecular springs, molecular actuators, molecular ratchets or molecular switches, received increasing attention in the past few years in chemistry, biology and nanosciences. [10][11][12][13][14][15][16] Although their mechanical properties play an important role in these applications, only very rare attempts have been made to evaluate these properties hitherto. Rempala and King 14 reported that polymeric polyelectrolyte helicenes interacting with amino or ionized phosphate groups are able to exhibit a maximum relative elongation of 176 AE 4% or 184 AE 4% by molecular dynamics calculations with non-debonded forcefields.…”

Section: Introductionmentioning

confidence: 99%

Extraordinary deformation capacity of smallest carbohelicene springs

Šesták

et al. 2015

Phys. Chem. Chem. Phys.

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The extraordinary deformation and loading capacity of nine different [∞]carbohelicene springs under uniaxial tension up to their fracture were computed using the density functional theory. The simulations comprised either the experimentally synthetized springs of hexagonal rings or the hypothetical ones that contained irregularities (defects) as, for example, pentagons replacing the hexagons. The results revealed that the presence of such defects can significantly improve mechanical properties. The maximum reversible strain varied from 78% to 222%, the maximum tensile force varied in the range of 5 nN to 7 nN and, moreover, the replacement of hexagonal rings by pentagons or heptagons significantly changed the location of double bonds in the helicenes. The fracture analysis revealed two different fracture mechanisms that could be related to the configurations of double and single bonds located at the internal atomic chain. Simulations performed with and without van der Waals interactions between intramolecular atoms showed that these interactions played an important role only in the first deformation stage.

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“…Molecular switches and foldamers, particularly systems influenced by ionic stimuli, represent a growing area of supramolecular chemistry research. 1 The non-covalent interactions between conformationally flexible sensing molecules and their ionic targets are often characterized by multiple competing equilibria and conformational states. 2 A thorough understanding of these types of guest-induced molecular transformations is necessary for the improvement and practical implementation of molecular switches and stimuli-responsive hosts.…”

Section: Introductionmentioning

confidence: 99%