Pseudo[<i>n</i>,<i>m</i>]rotaxanes of Cucurbit[7/8]uril and Viologen‐Naphthalene Derivative: A Precise Definition of Rotaxane

Zhang, Beilin; Dong, Yunhui; Li, Jie; Yang, Yu; Li, Chenyang; Cao, Liping

doi:10.1002/cjoc.201800562

Cited by 16 publications

(8 citation statements)

References 49 publications

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“…Metallarectangles based on Cp * Rh/Ir corners commonly have four positive charges, so this kind of metallarectangle is more suitable for electroneutral and negatively-charged guests than for positively-charged guests, likely due to Coulombic repulsion [ 40 ]. Some cations feature strongly electron-accepting π-systems, such as paraquat or methylviologen ( N , N ′ -dimethyl-4,4 ′ -bipyridinium), the chloride salt of which is known as a highly toxic pesticide [ 46 ]. As the bithiophenyl group is a strong D unit, it is possible to apply the strong interaction between D units and A units to overcome the Coulombic repulsion.…”

Section: Resultsmentioning

confidence: 99%

Self-assembly of metalla[3]catenanes, Borromean rings and ring-in-ring complexes using a simple π-donor unit

Liu

Lin

et al. 2020

National Science Review

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Despite extensive research and several stunning breakthroughs in the synthesis of interlocked molecular species, [3]catenanes, Borromean rings and ring-in-ring complex are exceedingly rare, and their targeted synthesis remains a formidable challenge. Herein, a series of Cp*Rh-based homogeneous and heterogeneous interlocked structures have been prepared by coordination-driven self-assembly, not only including metalla[2]catenanes and molecular Borromean rings, but also linear metalla[3]catenanes and ring-in-ring complex. The interlocked structures are all based on bithiophenyl groups. The bithiophenyl groups effectively enhance the strength of the inter-ring interactions and play a crucial role in the formation of these interlocked structures. By taking advantage of the strong interaction between π-donor (D) and π-acceptor (A) groups, the electron-deficient methylviologen cation was introduced into a cationic metallarectangle based on bithiophenyl groups. Taking inspiration from these results, a cationic metallarectangle based on A units was threaded into a metallarectangle based on D units, leading to a heterogeneous D-A ring-in-ring structures.

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Section: Resultsmentioning

confidence: 99%

Self-assembly of metalla[3]catenanes, Borromean rings and ring-in-ring complexes using a simple π-donor unit

Liu

Lin

et al. 2020

National Science Review

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“…Although individual cases have demonstrated photophysical changes upon complexation with CB [8], 31,35,39,[44][45][46][47] the beauty and power of this work stems from the simple modular design. As illustrated in Fig.…”

Section: Applicability and Exibility Of The Modular Strategymentioning

confidence: 99%

Controlling the structure and photophysics of fluorophore dimers using multiple cucurbit[8]uril clampings

Bae

Olesińska

et al. 2020

Chem. Sci.

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“…If a dimer is sustained with strong restriction, as will be introduced later, its pseudostatic excited state can remain as a dimeric form before relaxation to the ground state. On account of the restriction, the relaxation will mainly choose a radiative pathway of high efficiency, which could lead to dimerization-induced enhanced emission (DIEE) ,− or room-temperature phosphorescence (RTP). , If a dimer is dynamically and loosely held with weak restriction, its excited dimer may have more chances to dissociate into an excited monomer, which then behaves as a supramolecular catalyst to trigger subsequent reactions. , Similar profiles could also be found for the redox products of noncovalent dimers, working either as stable near-infrared (NIR) probes or catalytic supramolecular radicals depending on oxygen content. , …”

Section: Introductionmentioning

confidence: 92%

Molecular Engineering of Noncovalent Dimerization

Tang

et al. 2022

J. Am. Chem. Soc.

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Dimers are probably the simplest model to facilitate the understanding of fundamental physical and chemical processes that take place in much-expanded systems like aggregates, crystals, and other solid states. The molecular interplay within a dimer differentiates it from the corresponding monomeric state and determines its features. Molecular engineering of noncovalent dimerization through applied supramolecular restrictions enables additional control over molecular interplay, particularly over its dynamic aspect. This Perspective introduces the recent effort that has been made in the molecular engineering of noncovalent dimerization, including supramolecular dimers, folda-dimers, and macrocyclic dimers. It showcases how the variation in supramolecular restrictions endows molecular-based materials with improved performance and/or functions like enhanced emission, room-temperature phosphorescence, and effective catalysis. We particularly discuss pseudostatic dimers that can sustain molecular interplay for a long period of time, yet are still flexible enough to adapt to variations. The pseudostatic feature allows for active species to decay along an alternate pathway, thereby spinning off emerging features that are not readily accessible from conventional dynamic systems.

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Pseudo[n,m]rotaxanes of Cucurbit[7/8]uril and Viologen‐Naphthalene Derivative: A Precise Definition of Rotaxane

Cited by 16 publications

References 49 publications

Self-assembly of metalla[3]catenanes, Borromean rings and ring-in-ring complexes using a simple π-donor unit

Self-assembly of metalla[3]catenanes, Borromean rings and ring-in-ring complexes using a simple π-donor unit

Controlling the structure and photophysics of fluorophore dimers using multiple cucurbit[8]uril clampings

Molecular Engineering of Noncovalent Dimerization

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