Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts

We have designed and synthesized electron-rich calixarene derivatives, which undergo reversible electrochemical oxidation in a well-accessible potential range that allows the ready preparation and isolation of the corresponding cation radicals. Preparation of mono- or tetra-radical cation can be ach...

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Main Authors: Rajendra Rathore, Sergey V. Lindeman, Sameh H. Abdelwahed
Format: Article
Language:English
Published: MDPI AG 2022-09-01
Series:Molecules
Subjects:
Online Access:https://www.mdpi.com/1420-3049/27/18/5994
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author Rajendra Rathore
Sergey V. Lindeman
Sameh H. Abdelwahed
author_facet Rajendra Rathore
Sergey V. Lindeman
Sameh H. Abdelwahed
author_sort Rajendra Rathore
collection DOAJ
description We have designed and synthesized electron-rich calixarene derivatives, which undergo reversible electrochemical oxidation in a well-accessible potential range that allows the ready preparation and isolation of the corresponding cation radicals. Preparation of mono- or tetra-radical cation can be achieved by using stable aromatic cation-radical salts such as MA<sup>+•</sup>, MB<sup>+•</sup>, and NAP<sup>+•</sup> as selective organic oxidants. The cation radicals of calixarenes are stable indefinitely at ambient temperatures and can be readily characterized by UV-vis-NIR spectroscopy. These cation radicals bind a single molecule of nitric oxide within its cavity with remarkable efficiency.
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spelling doaj.art-796d842094ef48e487d567e2fb4185602023-11-23T18:02:24ZengMDPI AGMolecules1420-30492022-09-012718599410.3390/molecules27185994Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical SaltsRajendra Rathore0Sergey V. Lindeman1Sameh H. Abdelwahed2Department of Chemistry, Marquette University, Milwaukee, WI 53233, USADepartment of Chemistry, Marquette University, Milwaukee, WI 53233, USADepartment of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USAWe have designed and synthesized electron-rich calixarene derivatives, which undergo reversible electrochemical oxidation in a well-accessible potential range that allows the ready preparation and isolation of the corresponding cation radicals. Preparation of mono- or tetra-radical cation can be achieved by using stable aromatic cation-radical salts such as MA<sup>+•</sup>, MB<sup>+•</sup>, and NAP<sup>+•</sup> as selective organic oxidants. The cation radicals of calixarenes are stable indefinitely at ambient temperatures and can be readily characterized by UV-vis-NIR spectroscopy. These cation radicals bind a single molecule of nitric oxide within its cavity with remarkable efficiency.https://www.mdpi.com/1420-3049/27/18/5994calixareneelectronic propertiesoptical propertiescation radicalnear-IR regioncyclic voltammetry
spellingShingle Rajendra Rathore
Sergey V. Lindeman
Sameh H. Abdelwahed
Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts
Molecules
calixarene
electronic properties
optical properties
cation radical
near-IR region
cyclic voltammetry
title Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts
title_full Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts
title_fullStr Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts
title_full_unstemmed Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts
title_short Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts
title_sort design synthesis electronic properties and x ray structural characterization of various modified electron rich calixarene derivatives and their conversion to stable cation radical salts
topic calixarene
electronic properties
optical properties
cation radical
near-IR region
cyclic voltammetry
url https://www.mdpi.com/1420-3049/27/18/5994
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AT sergeyvlindeman designsynthesiselectronicpropertiesandxraystructuralcharacterizationofvariousmodifiedelectronrichcalixarenederivativesandtheirconversiontostablecationradicalsalts
AT samehhabdelwahed designsynthesiselectronicpropertiesandxraystructuralcharacterizationofvariousmodifiedelectronrichcalixarenederivativesandtheirconversiontostablecationradicalsalts