Daisy Chain Dendrimers: Integrated Mechanically Interlocked Molecules with Stimuli-Induced Dimension Modulation Feature

2020 ◽  
Vol 142 (18) ◽  
pp. 8473-8482 ◽  
Author(s):  
Wei-Jian Li ◽  
Wei Wang ◽  
Xu-Qing Wang ◽  
Mu Li ◽  
Yubin Ke ◽  
...  
Keyword(s):  
Interlocked Molecules

scholarly journals π-Stacking Stopper-Macrocycle Stabilized Dynamically Interlocked [2]Rotaxanes

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4704
Author(s):  
Sing-Ming Chan ◽  
Fung-Kit Tang ◽  
Ching-Yau Lam ◽  
Chak-Shing Kwan ◽  
Sam C. K. Hau ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Thermodynamic Stability ◽  
Combinatorial Library ◽  
Aromatic Rings ◽  
Interlocked Molecules ◽  
X Ray ◽  
Π Stacking ◽  
Dynamic Combinatorial Library

The synthesis of mechanically interlocked molecules is valuable due to their unique topologies. With π-stacking intercomponent interaction, e.g., phenanthroline and anthracene, novel [2]rotaxanes have been synthesized by dynamic imine clipping reaction. Their X-ray crystal structures indicate the π-stackings between the anthracene moiety (stopper) on the thread and the (hetero)aromatic rings at the macrocycle of the rotaxanes. Moreover, the length of glycol chains affects the extra π-stacking intercomponent interactions between the phenyl groups and the dimethoxy phenyl groups on the thread. Dynamic combinatorial library has shown at best 84% distribution of anthracene-threaded phenanthroline-based rotaxane, coinciding with the crystallography in that the additional π-stacking intercomponent interactions could increase the thermodynamic stability and selectivity of the rotaxanes.

scholarly journals Ring rotation of ferrocene in interlocked molecules in single crystals

2021 ◽  
Author(s):  
Chi-Hsien Wang ◽  
Kai-Jen Chen ◽  
Tsung-Huan Wu ◽  
Hung-Kai Chang ◽  
Yoshitaka Tsuchido ◽  
...  
Keyword(s):  
Crown Ether ◽  
Single Crystals ◽  
Internal Rotation ◽  
Molecular Motions ◽  
Interlocked Molecules ◽  
Ring Rotation

Unique molecular motions, reversible internal rotation of ferrocene and flipping of crown ether are observed in DB30C10 and DB18C6-containing interlocked molecules, respectively.

scholarly journals Rotaxane synthesis exploiting the M(i)/M(iii) redox couple

2017 ◽  
Vol 46 (35) ◽  
pp. 11645-11655 ◽  
Author(s):  
Jack Emerson-King ◽  
Richard C. Knighton ◽  
Matthew R. Gyton ◽  
Adrian B. Chaplin
Keyword(s):  
Building Blocks ◽  
Redox Couple ◽  
Interlocked Molecules

In the context of advancing the use of metal-based building blocks for the construction of new and interesting mechanically interlocked molecules, we herein describe the preparation of rhodium and iridium containing [2]rotaxanes.

A Dynamic Route to Structure and Function: Recent Advances in Imine-Based Organic Nanostructured Materials

2013 ◽  
Vol 66 (1) ◽  
pp. 9 ◽  
Author(s):  
Yi Liu ◽  
Zhan-Ting Li
Keyword(s):  
Self Assembly ◽  
Reaction System ◽  
Functional Materials ◽  
Building Blocks ◽  
The Self ◽  
Interlocked Molecules ◽  
Functional Aspects ◽  
Imine Bond ◽  
And Function ◽  
Dynamic Route

The chemistry of imine bond formation from simple aldehyde and amine precursors is among the most powerful dynamic covalent chemistries employed for the construction of discrete molecular objects and extended molecular frameworks. The reversible nature of the C=N bond confers error-checking and proof-reading capabilities in the self-assembly process within a multi-component reaction system. This review highlights recent progress in the self-assembly of complex organic molecular architectures that are enabled by dynamic imine chemistry, including molecular containers with defined geometry and size, mechanically interlocked molecules, and extended frameworks and polymers, from building blocks with preprogrammed steric and electronic information. The functional aspects associated with the nanometer-scale features not only place these dynamically constructed nanostructures at the frontier of materials sciences, but also bring unprecedented opportunities for the discovery of new functional materials.

scholarly journals The active template approach to interlocked molecules

2017 ◽  
Vol 1 (8) ◽  
Author(s):  
Mathieu Denis ◽  
Stephen M. Goldup
Keyword(s):  
Interlocked Molecules

Toward Interlocked Molecules beyond Catenanes and Rotaxanes

2000 ◽  
Vol 2 (19) ◽  
pp. 2943-2946 ◽  
Author(s):  
Theresa Chang ◽  
Aaron M. Heiss ◽  
Stuart J. Cantrill ◽  
Matthew C. T. Fyfe ◽  
Anthony R. Pease ◽  
...  
Keyword(s):  
Interlocked Molecules

Topological molecular nanocarbons: All-benzene catenane and trefoil knot

Science ◽  
2019 ◽  
Vol 365 (6450) ◽  
pp. 272-276 ◽  
Author(s):  
Yasutomo Segawa ◽  
Motonobu Kuwayama ◽  
Yuh Hijikata ◽  
Masako Fushimi ◽  
Taishi Nishihara ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Energy Transfer ◽  
Magnetic Resonance ◽  
Dynamic Behavior ◽  
Enantiomer Separation ◽  
Hydrogen Atoms ◽  
Interlocked Molecules ◽  
Benzene Rings ◽  
Trefoil Knot ◽  
Synthetic Routes

The generation of topologically complex nanocarbons can spur developments in science and technology. However, conventional synthetic routes to interlocked molecules require heteroatoms. We report the synthesis of catenanes and a molecular trefoil knot consisting solely of para-connected benzene rings. Characteristic fluorescence of a heterocatenane associated with fast energy transfer between two rings was observed, and the topological chirality of the all-benzene knot was confirmed by enantiomer separation and circular dichroism spectroscopy. The seemingly rigid all-benzene knot has rapid vortex-like motion in solution even at –95°C, resulting in averaged nuclear magnetic resonance signals for all hydrogen atoms. This interesting dynamic behavior of the knot was theoretically predicted and could stimulate deeper understanding and applications of these previously untapped classes of topological molecular nanocarbons.

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