Electrochemical Control of Recognition Processes. A Three-Component Molecular Switch

Deans, Robert; Niemz, Angelika; Breinlinger, Eric C.; Rotello, Vincent M.

doi:10.1021/ja9728740

Cited by 72 publications

(54 citation statements)

References 22 publications

(11 reference statements)

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“…47 Subsequently, Rotello's group has used aromatic imides in a variety of redox-dependent binding studies. [48][49][50] Like the flavins in aprotic solvents, the aromatic imides undergo reversible reductions to radical anions in aprotic solvents, which greatly increases the strength of binding to diamidopyridine or other similarly structured binding partners. With the flavin and imide systems, the central NH provides an additional H-bond that helps to strengthen the interaction with guest in the oxidized form.…”

Section: Arylimidesmentioning

confidence: 99%

Electrochemically Controlled H‐Bonding

Smith

2009

Electrochemistry of Functional Supramolecular Systems

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Section: Arylimidesmentioning

confidence: 99%

Electrochemically Controlled H‐Bonding

Smith

2009

Electrochemistry of Functional Supramolecular Systems

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“…ð2:3Þ ½CoðNH 3 Þ 6 2þ !Co 2þ þ 6NH 3 ð2:4Þ Another example of electrochemionic process is illustrated in Figure 2.9 [35].…”

Section: Molecular Electrochemionicsmentioning

confidence: 99%

Processing Energy and Signals by Molecular and Supramolecular Systems

2008

Molecular Devices and Machines

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Any kind of device or machine needs a substrate, energy, and information signals. If we wish to operate at the nanometer scale, we must use molecules as substrate. Molecules, indeed, are nanometer-sized entities that, particularly when suitably assembled in supramolecular systems, can exploit energy and signals to operate as devices and machines.A general scheme for the operation of molecule-based devices and machines is shown in Figure 2.1a. We start with a species A, whose properties can be monitored (read) by a suitable input, input reading, I r (A) (e.g., absorption spectroscopy), which generates an output, output reading, O r (A). Then, we write an information on A by an energy input, input writing, I w (A ! B), which converts A into B. Since A and B are molecules, the writing process must be a chemical reaction [1]. Reading the system with I r (B) after applying I w yields an output, O r (B), that reveals the new state of the system.In the case of a machine, I w is responsible for the operation, while I r and O r monitor the machine movement. In the case of an information-processing device, the performed function is based on the relationship among I r , O r , and I w (Chapter 9).The most important energy inputs to write on molecules are in nature electronic (I e w ), photonic (I p w ), and chemical (I c w ) [2]. The reading inputs I r are multifarious; indeed, any kind of physical signals can be used. Electronic, photonic, and chemical outputs are most often used for several reasons.The operation of a molecular device or machine relies on cause/effect relationship between writing inputs and the kind of process obtained (as revealed by reading techniques). Therefore, it may be useful to categorize molecular devices and machines according to the nature of the cause (electronic, photonic, or chemical input) and the nature of the effect (electronic, photonic, or chemical process that follows). In the simplest case, input and resulting process have the same nature: an electronic input can generate release of an electron (molecular electronics), the absorption of a photon can generate emission of a photon (molecular photonics), and a chemical input can generate a chemical reaction (molecular chemionics). It is also possible, j23 Molecular Devices and Machines. Concepts and Perspectives for the Nanoworld. 2 nd Ed.

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“…So haben Rotello et al im Bereich der Redoxschalter einen neuartigen, elektrochemisch gesteuerten Drei-Komponenten-Schalter auf der Basis von Wasserstoffbrückenbindungen entwickelt. [174] Kaifer, Mora Â n et al berichteten über die elektrochemisch schaltbare Bildung von b-Cyclodextrin-Einschluûverbindungen mit Dendrimeren, die bis zu 16 Ferrocenylgruppen enthielten, als mehrfach komplexierbaren Gastverbindungen. [175] In der Arbeitsgruppe um Beer wurden weitere Fortschritte auf dem Gebiet der Anionenbindung erzielt: Mit einem Calix[4]aren, das eine angeknüpfte [Ru(bpy) 3 ]-Einheit enthielt, wurde eine erhöhte Selektivität für H 2 PO À 4 -Ionen erreicht.…”

Section: Addendumunclassified

Supramolekulare Elektrochemie

1998

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Welche Möglichkeiten bietet die Elektrochemie der supramolekularen Chemie? Einerseits liefert sie Informationen, die mit spektroskopischen und massenspektrometrischen Methoden nicht zugänglich sind, andererseits lassen sich mit ihr supramolekulare Wechselwirkungen beeinflussen. Rechts ist exemplarisch das Cyclovoltammogramm des gezeigten Lanthan‐Kryptats abgebildet; nur die ersten drei Reduktionen werden registriert, obwohl insgesamt sechs Elektronen auf die Bipyridineinheiten übertragen werden können (E in V gegen Ferrocen/Ferrocenium).

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Electrochemical Control of Recognition Processes. A Three-Component Molecular Switch

Cited by 72 publications

References 22 publications

Electrochemically Controlled H‐Bonding

Electrochemically Controlled H‐Bonding

Processing Energy and Signals by Molecular and Supramolecular Systems

Supramolekulare Elektrochemie

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