Literature DB >> 19334727

Probing cucurbituril assemblies in water with TEMPO-like nitroxides: a trinitroxide supraradical with spin-spin interactions.

David Bardelang1, Karol Banaszak, Hakim Karoui, Antal Rockenbauer, Mélanie Waite, Konstantin Udachin, John A Ripmeester, Christopher I Ratcliffe, Olivier Ouari, Paul Tordo.   

Abstract

Nitroxide free radicals are demonstrated to be useful guests for probing cucurbit[n]uril (CB[n]) assemblies in water by EPR spectroscopy. CB[7] and CB[8] significantly aggregate either in solution or in the solid state (as evidenced by a single-crystal X-ray structure in which CB[8] forms supramolecular triangles with 4-methoxy-TEMPO). The included nitroxides show a striking resistance to biologically relevant reduction, benefiting from the carcerand effect of CB[7] and CB[8] solutions.

Entities:  

Year:  2009        PMID: 19334727     DOI: 10.1021/ja900306m

Source DB:  PubMed          Journal:  J Am Chem Soc        ISSN: 0002-7863            Impact factor:   15.419


  5 in total

1.  Supramolecular host-guest interaction of trityl-nitroxide biradicals with cyclodextrins: modulation of spin-spin interaction and redox sensitivity.

Authors:  Xiaoli Tan; Yuguang Song; Huiqiang Liu; Qinwen Zhong; Antal Rockenbauer; Frederick A Villamena; Jay L Zweier; Yangping Liu
Journal:  Org Biomol Chem       Date:  2016-02-07       Impact factor: 3.876

2.  Opposing Effects of Cucurbit[7]uril and 1,2,3,4,6-Penta-O-galloyl-β-d-glucopyranose on Amyloid β25-35 Assembly.

Authors:  Natália E C de Almeida; Thanh D Do; Michael Tro; Nichole E LaPointe; Stuart C Feinstein; Joan-Emma Shea; Michael T Bowers
Journal:  ACS Chem Neurosci       Date:  2015-12-10       Impact factor: 5.780

3.  Structures of the reaction products of the AZADO radical with TCNQF4 or thiourea.

Authors:  Hideto Suzuki; Yuta Kawahara; Hiroki Akutsu; Jun-Ichi Yamada; Shin'ichi Nakatsuji
Journal:  Beilstein J Org Chem       Date:  2013-07-25       Impact factor: 2.883

4.  ESR, STESR, DFT, and MD Study of the Dynamical Structure of Cucurbituril[7]-Spin Probe Guest-Host Complexes.

Authors:  Vsevolod A Livshits; Boris B Meshkov; Vitaly G Avakyan; Sergei V Titov
Journal:  ACS Omega       Date:  2020-05-18

5.  EPR Spectroscopy: A Powerful Tool to Analyze Supramolecular Host•Guest Complexes of Stable Radicals with Cucurbiturils.

Authors:  Fengbo Liu; Hakim Karoui; Antal Rockenbauer; Simin Liu; Olivier Ouari; David Bardelang
Journal:  Molecules       Date:  2020-02-11       Impact factor: 4.411

  5 in total

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