Results 21 to 30 of about 5,195 (200)

Compact Rotaxane Superbases

Journal of the American Chemical Society, 2023
Challenges for the development of efficacious new superbases include their ease of synthesis, chemical stability, and high basicity, while minimizing nucleophilicity is important for reducing unwanted side reactions. Here, we introduce a new family of organic superbases, compact amine-crown ether rotaxanes, which show desirable characteristics in all ...
Power, Martin J., Morris, David T. J., Vitorica-Yrezabal, Iñigo J., Leigh, David A.   +3 more
openaire   +3 more sources

A Mechanochromic Hydrogen‐Bonded Rotaxane [PDF]

Macromolecular Rapid Communications, 2020
AbstractTensile forces influence a variety of important biological processes and force sensors are required to study these processes in vivo. Current force sensors are often tailor‐made for a specific application, or activate at much higher forces than those observed at the cellular or tissue level. A versatile force sensor, with tunable mechanical and
Rafael Sandoval‐Torrientes, ThomasR. Carr, Guillaume De Bo   +2 more
openaire   +3 more sources

Five-component, one-pot synthesis of an electroactive rotaxane comprising a bisferrocene macrocycle

Beilstein Journal of Organic Chemistry, 2020
The templated clipping of a ferrocene-grafted isophthalic acid derivative to encircle a hydrogen-bonding axle through the reaction with 1,4-bis(aminomethyl)benzene is described.
Natalie Lagesse, Luca Pisciottani, Maxime Douarre, Pascale Godard, Brice Kauffmann, Vicente Martí-Centelles, Nathan D. McClenaghan   +6 more
doaj   +1 more source

Photochemical Unmasking of Polyyne Rotaxanes [PDF]

Journal of the American Chemical Society, 2020
Bulky photolabile masked alkyne equivalents (MAEs) are needed for the synthesis of polyyne polyrotaxanes, as insulated molecular wires and as stabilized forms of the linear polymeric allotrope of carbon, carbyne. We have synthesized a novel MAE based on phenanthrene and compared it with an indane-based MAE.
Steffen L. Woltering, Przemyslaw Gawel, Kirsten E. Christensen, Amber L. Thompson, Harry L. Anderson   +4 more
openaire   +3 more sources

Impact of Threading State on the Mechanics of γ‐Cyclodextrin–Pyrene Gels

Angewandte Chemie, EarlyView.
Tuning the threading state of discrete γ‐cyclodextrin (γ‐CD)–pyrene pseudorotaxane crosslinkers controls gel topology and ring mobility. The resulting doubly threaded slide‐ring networks exhibit solvent‐switchable dissipative dynamics, high extensibility, rate‐dependent mechanics, and low hysteresis, revealing how crosslink topology governs macroscopic
Jongwon Oh, Heyi Liang, Natsumi Nitta, Jongmin Kim, Yuan Tian, Guancen Liu, Jerald E. Hertzog, Juan J. de Pablo, Stuart J. Rowan   +8 more
wiley   +2 more sources

Multiple threading of a triple-calix[6]arene host

Beilstein Journal of Organic Chemistry, 2019
The synthesis of the triple-calix[6]arene derivative 6 in which three calix[6]arene macrocycles are linked to a central 1,3,5-trimethylbenzene moiety is reported.
Veronica Iuliano, Roberta Ciao, Emanuele Vignola, Carmen Talotta, Patrizia Iannece, Margherita De Rosa, Annunziata Soriente, Carmine Gaeta, Placido Neri   +8 more
doaj   +1 more source

Heteroditopic Rotaxanes and Catenanes for Ion Pair Recognition

Chemistry, 2023
A review of heteroditopic interlocked molecules and their application as receptors for simple inorganic ion pair species. The review details the design and ion recognition properties of the rotaxane and catenane receptors, as well as highlighting some of
Steven J. Nicholson, Sean R. Barlow, Nicholas H. Evans   +2 more
doaj   +1 more source

Exploiting the 1,2,3-triazolium motif in anion-templated formation of a bromide-selective rotaxane host assembly. [PDF]

, 2009
Bromide is best: The first [2]rotaxane incorporating the triazolium anion-binding motif is prepared using bromide anion templation. Preliminary anion-binding investigations reveal that the rotaxane exhibits the rare selectivity preference for bromide ...
Kathleen M. Mullen, Mercurio, James, Beer, P.D., James Mercurio, Beer, Paul, Mercurio, J., Mercurio, J, Mullen, K.M., Paul D. Beer, Mullen, Kathleen, Beer, PD, Serpell, CJ, Serpell, Christopher, Serpell, C.J., Christopher J. Serpell, Mullen, KM   +15 more
core   +1 more source

A Mechanical sp2‐Jail for C60 Fullerene

Angewandte Chemie, EarlyView.
A rigid bisporphyrin receptor with an exceptionally compact 3D cavity functions as a molecular “mechanical jail”, tightly enclosing C60 fullerene. Near‐perfect shape complementarity affords ultrahigh binding affinity while imposing a large kinetic barrier for guest exchange, rendering encapsulation effectively irreversible under ambient conditions ...
A. Priscila Gia, Fernando G. Guijarro, Pau Armada, Daniel Aranda, Josefina Perles, Enrique Ortí, Juan Aragó, David González‐Rodríguez, Alberto de Juan   +8 more
wiley   +2 more sources

Chirality in rotaxanes and catenanes

Chemical Society Reviews, 2018
We discuss the stereogenic units that have been investigated in interlocked molecules, their application, absolute stereochemistry and propose future directions.
E. M. G. Jamieson, F. Modicom, S. M. Goldup   +2 more
openaire   +3 more sources