Unknown

Dataset Information

0

Spacer Length-Independent Shuttling of the Pillar[5]arene Ring in Neutral [2]Rotaxanes.

ABSTRACT: For a series of neutral [2]rotaxanes consisting of a pillar[5]arene ring and axles possessing two stations separated by flexible spacers of different lengths, the free energies of activation for the ring shuttling between the stations were found to be independent of the spacer length. The constitution of the spacer affects the activation energies: replacement of CH2 groups by repulsive oxygen atoms in the axle increases the barrier. The explanation for the observed length-independence lies in the presence of a barrier for re-forming the stable co-conformation, which makes the ring travel back and forth along the thread in an intermediate state.

SUBMITTER: Ogoshi T 

PROVIDER: S-EPMC5947626 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Spacer Length-Independent Shuttling of the Pillar[5]arene Ring in Neutral [2]Rotaxanes.

Ogoshi Tomoki T   Kotera Daisuke D   Nishida Shungo S   Kakuta Takahiro T   Yamagishi Tada-Aki TA   Brouwer Albert M AM  

Chemistry (Weinheim an der Bergstrasse, Germany) 20180308 24

For a series of neutral [2]rotaxanes consisting of a pillar[5]arene ring and axles possessing two stations separated by flexible spacers of different lengths, the free energies of activation for the ring shuttling between the stations were found to be independent of the spacer length. The constitution of the spacer affects the activation energies: replacement of CH<sub>2</sub> groups by repulsive oxygen atoms in the axle increases the barrier. The explanation for the observed length-independence  ...[more]

Similar Datasets

Unknown Diversity Oriented Preparation of Pillar[5]arene-Containing [2]Rotaxanes by a Stopper Exchange Strategy.
| S-EPMC7110104 | biostudies-literature
Unknown Formation of a series of stable pillar[5]arene-based pseudo[1]-rotaxanes and their [1]rotaxanes in the crystal state.
| S-EPMC4923850 | biostudies-other
Unknown Influence of axle length on the rate and mechanism of shuttling in rigid H-shaped [2]rotaxanes.
| S-EPMC5851341 | biostudies-literature
Unknown Synthesis of diamido-bridged bis-pillar[5]arenes and tris-pillar[5]arenes for construction of unique [1]rotaxanes and bis-[1]rotaxanes.
| S-EPMC6036973 | biostudies-literature
Unknown Calix[6]arene-based atropoisomeric pseudo[2]rotaxanes.
| S-EPMC6122310 | biostudies-literature
Unknown Pillar[5]arene-Decorated Single-Walled Carbon Nanotubes.
| S-EPMC6645158 | biostudies-literature
Unknown The lubricating role of water in the shuttling of rotaxanes.
| S-EPMC5613241 | biostudies-other
Unknown Light triggers molecular shuttling in rotaxanes: control over proximity and charge recombination.
| S-EPMC6446966 | biostudies-literature
Unknown A pillar[5]arene-based [2]rotaxane lights up mitochondria.
| S-EPMC6003608 | biostudies-literature
Unknown Stereochemical Inversion of Rim-Differentiated Pillar[5]arene Molecular Swings.
| S-EPMC7498154 | biostudies-literature