The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Alberto Credi - One of the best experts on this subject based on the ideXlab platform.
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electrochemically triggered co conformational switching in a 2 catenane comprising a non symmetric calix 6 arene wheel and a two station oriented macrocycle
Molecules, 2018Co-Authors: Valeria Zanichelli, Luca Dallacasagrande, Arturo Arduini, Giulio Ragazzon, Serena Silvi, Andrea Secchi, Alberto CrediAbstract:Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon External Stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.
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signal processing with multicomponent systems based on metal complexes
Coordination Chemistry Reviews, 2010Co-Authors: Matteo Amelia, Lei Zou, Alberto CrediAbstract:Abstract Molecular-level systems that respond to External Stimulation by changing some physical or chemical properties can be viewed as input–output devices and therefore may be useful for processing information. In recent years, several investigations on species capable of mimicking the function of macroscopic wires, switches, connectors, memories, logic gates, and circuits have been reported. The rational basis for this research stems from the fact that in living organisms information is transported, elaborated and stored by molecular or ionic substrates operating in a solution-based environment. Because of their diverse and valuable physico-chemical properties, metal complexes have been extensively used as functional components for the construction of artificial molecular devices capable of processing information. Here we illustrate recent progress, and discuss limitations and perspectives of this research area.
Valeria Zanichelli - One of the best experts on this subject based on the ideXlab platform.
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electrochemically triggered co conformational switching in a 2 catenane comprising a non symmetric calix 6 arene wheel and a two station oriented macrocycle
Molecules, 2018Co-Authors: Valeria Zanichelli, Luca Dallacasagrande, Arturo Arduini, Giulio Ragazzon, Serena Silvi, Andrea Secchi, Alberto CrediAbstract:Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon External Stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.
Giulio Ragazzon - One of the best experts on this subject based on the ideXlab platform.
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electrochemically triggered co conformational switching in a 2 catenane comprising a non symmetric calix 6 arene wheel and a two station oriented macrocycle
Molecules, 2018Co-Authors: Valeria Zanichelli, Luca Dallacasagrande, Arturo Arduini, Giulio Ragazzon, Serena Silvi, Andrea Secchi, Alberto CrediAbstract:Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon External Stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.
Luca Dallacasagrande - One of the best experts on this subject based on the ideXlab platform.
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electrochemically triggered co conformational switching in a 2 catenane comprising a non symmetric calix 6 arene wheel and a two station oriented macrocycle
Molecules, 2018Co-Authors: Valeria Zanichelli, Luca Dallacasagrande, Arturo Arduini, Giulio Ragazzon, Serena Silvi, Andrea Secchi, Alberto CrediAbstract:Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon External Stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.
Serena Silvi - One of the best experts on this subject based on the ideXlab platform.
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electrochemically triggered co conformational switching in a 2 catenane comprising a non symmetric calix 6 arene wheel and a two station oriented macrocycle
Molecules, 2018Co-Authors: Valeria Zanichelli, Luca Dallacasagrande, Arturo Arduini, Giulio Ragazzon, Serena Silvi, Andrea Secchi, Alberto CrediAbstract:Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon External Stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.
