1
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Chumakova NA, Vorobiev AK, Astvatsaturov D, Yankova TS, Rebrikova A, Matveev MV. Quantitative determination of the orientational ordering of the graphene oxide membranes by spin probe technique. Phys Chem Chem Phys 2022; 24:4881-4890. [DOI: 10.1039/d1cp05417a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The orientational alignment of the graphene oxide membranes was determined quantitatively using spin probe technique; the values of the orientational order parameters up to 6th rank were obtained. It was...
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2
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Kundu S, Rane V. Design and Photo-Induced Dynamics of Radical-Chromophore Adducts with One- or Two-Atom Separation: Toward Potential Probes for High Field Optical DNP Experiments. J Phys Chem B 2020; 124:3163-3179. [PMID: 32223248 DOI: 10.1021/acs.jpcb.0c01123] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Breaking the maximum enhancement barrier of 660 at room temperature in a conventional dynamic nuclear polarization (DNP) experiment has the immense potential of practical applications. Optical DNP experiments with radical-chromophore (RC) adducts, which harnesses hyperpolarized radicals, instead of thermalized radicals, offers a powerful way to achieve this. Typical DNP and NMR experiments, however, are carried out at high magnetic fields of about 5-10 T, whereas the large electron spin hyperpolarization (ESP) demonstrated in the RC adducts so far are at a much low field of 0.3 T. Thus, in order to realize a successful optical DNP experiment, it is imperative to ask whether the RC adducts, which are currently available, can achieve a large ESP even at high fields. The present work poses this question and shows that the current RC adducts would not generate a large ESP at high fields unless the separation between the chromophore and nitroxyl moiety is reduced to less than four bonds. Two serious bottlenecks in this direction are the near impossibility of synthesizing such RC adducts using the common nitroxyl radicals and the absence of any photophysical studies on RC adducts with such short spacer groups. In this regard, the present work exploits the spin trapping methodology to synthesize one- and two-atom separated naphthalene-nitroxyl RC adducts. Good yields and excellent stability of the adducts have been demonstrated. Furthermore, the present work presents their detailed photophysical and photochemical studies by transient optical and time-resolved EPR studies. On the basis of the present results, a potential RC adduct is proposed for the high field optical DNP experiments. Finally, the prospect of exploiting the large EPR signal enhancement due to ESP in the field of spin trapping studies has been discussed.
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Affiliation(s)
- Sushma Kundu
- Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai-400005, India
| | - Vinayak Rane
- Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
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3
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Lussini VC, Blinco JP, Fairfull-Smith KE, Bottle SE, Colwell JM. Profluorescent nitroxide sensors for monitoring the natural aging of polymer materials. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109091] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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4
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Vorobiev AK, Bogdanov AV, Yankova TS, Chumakova NA. Spin Probe Determination of Molecular Orientation Distribution and Rotational Mobility in Liquid Crystals: Model-Free Approach. J Phys Chem B 2019; 123:5875-5891. [PMID: 31251620 DOI: 10.1021/acs.jpcb.9b05431] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A model-free approach for simulation of EPR spectra of nitroxide spin probes in liquid-crystalline materials was suggested and used to obtain parameters of molecular orientation and rotational mobility. The developed method is based on experimental recording and numerical simulation of the angular dependence of EPR spectra, which is shown to be much more informative in comparison with a single EPR spectrum. Quantitative spectral simulations considering both local orientational ordering and distribution of local directors in the sample were used for discrimination of models of rotational mobility and orientational alignment. The method was applied for detailed quantitative characterization of axial, orthorhombic, and low-symmetry non-orthorhombic molecular orientation distributions. It is shown that the ordinarily used model of rotational diffusion in a mean-field potential is suitable for the description of molecular mobility and orientational ordering only for relatively low sample temperatures and low-mobility probe molecules with large sizes. In cases of high molecular mobility, the more realistic jump mechanism of molecular moves can be approximately described as quasi-librations. For ordered liquid crystals it was found that mostly the order parameters up to rank 12-14 are essential and easily determined. When well-aligned materials are described, the order parameters up to 18th rank or even higher become meaningful. Both molecular and sample biaxiality is analyzed and quantitatively characterized. The local molecular ordering and sample orientational alignment are quantitatively characterized separately.
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Affiliation(s)
- A Kh Vorobiev
- Department of Chemistry , Moscow State University , Leninskie Gory 1-3 , Moscow 119991 , Russia
| | - A V Bogdanov
- Department of Chemistry , Moscow State University , Leninskie Gory 1-3 , Moscow 119991 , Russia
| | - T S Yankova
- Department of Chemistry , Moscow State University , Leninskie Gory 1-3 , Moscow 119991 , Russia
| | - N A Chumakova
- Department of Chemistry , Moscow State University , Leninskie Gory 1-3 , Moscow 119991 , Russia
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5
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Bognár B, Úr G, Sár C, Hankovszky OH, Hideg K, Kálai T. Synthesis and Application of Stable Nitroxide Free Radicals Fused with Carbocycles and Heterocycles. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190318163321] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Stable nitroxide free radicals have traditionally been associated with 2,2,6,6-
tetramethylpiperidine-1-oxyl (TEMPO) or its 4-substituted derivatives as relatively inexpensive
and readily accessible compounds with limited possibilities for further chemical
modification. Over the past two decades, there has been a resurgence of interest in stable
free radicals with proper functionalization tuned for various applications. The objective of
this review is to present recent results with synthetic methodologies to achieve stable nitroxide
free radicals fused with aromatic carbocycles and heterocycles. There are two
main approaches for accessing stable nitroxide free radicals fused with arenes, e.g., isoindoline-
like nitroxides: further functionalization and oxidation of phthalimide or inventive
functionalization of pyrroline nitroxide key compounds. The latter also offers the constructions
of versatile heterocyclic scaffolds (furan, pyrrole, thiophene, 1,2-thiazole, selenophene, pyrazole,
pyrimidine, pyridine, pyridazine, 1,5-benzothiazepine) that are fused with pyrroline or tetrahydropyridine nitroxide
rings. The possible applications of these new stable nitroxide free radicals, such as covalent spin labels
and noncovalent spin probes of proteins and nucleic acids, profluorescent probes, building blocks for construction
of dual active drugs and electroactive materials, and substances for controlled free radical polymerization,
are discussed.
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Affiliation(s)
- Balázs Bognár
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pecs, Szigeti st. 12, H-7624 Pecs, Hungary
| | - Györgyi Úr
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pecs, Szigeti st. 12, H-7624 Pecs, Hungary
| | - Cecília Sár
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pecs, Szigeti st. 12, H-7624 Pecs, Hungary
| | - Olga H. Hankovszky
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pecs, Szigeti st. 12, H-7624 Pecs, Hungary
| | - Kálmán Hideg
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pecs, Szigeti st. 12, H-7624 Pecs, Hungary
| | - Tamás Kálai
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pecs, Szigeti st. 12, H-7624 Pecs, Hungary
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6
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Smulik-Izydorczyk R, Dębowska K, Pięta J, Michalski R, Marcinek A, Sikora A. Fluorescent probes for the detection of nitroxyl (HNO). Free Radic Biol Med 2018; 128:69-83. [PMID: 29704623 DOI: 10.1016/j.freeradbiomed.2018.04.564] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 11/19/2022]
Abstract
Nitroxyl (HNO), which according to the IUPAC recommended nomenclature should be named azanone, is the protonated one-electron reduction product of nitric oxide. Recently, it has gained a considerable attention due to the interesting pharmacological effects of its donors. Although there has been great progress in the understanding of HNO chemistry and chemical biology, it still remains the most elusive reactive nitrogen species, and its selective detection is a real challenge. The development of reliable methodologies for the direct detection of azanone is essential for the understanding of important signaling properties of this reactive intermediate and its pharmacological potential. Over the last decade, there has been considerable progress in the development of low-molecular-weight fluorogenic probes for the detection of HNO, and therefore, in this review, we have focused on the challenges and limitations of and perspectives on nitroxyl detection based on the use of such probes.
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Affiliation(s)
- Renata Smulik-Izydorczyk
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Karolina Dębowska
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Jakub Pięta
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Radosław Michalski
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Andrzej Marcinek
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Adam Sikora
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
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7
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Saha S, Hetzke T, Prisner TF, Sigurdsson ST. Noncovalent spin-labeling of RNA: the aptamer approach. Chem Commun (Camb) 2018; 54:11749-11752. [PMID: 30276367 DOI: 10.1039/c8cc05597a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the first example of site-directed spin-labeling of unmodified RNA, a pyrrolidine-nitroxide derivative of tetramethylrosamine (TMR) was shown to bind with high affinity to the malachite green (MG) aptamer, as determined by continuous-wave (CW) electron paramagnetic resonance (EPR), pulsed electron-electron double resonance (PELDOR) and fluorescence spectroscopies.
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Affiliation(s)
- Subham Saha
- Department of Chemistry, Science Institute, Dunhaga 3, 107 Reykjavik, Iceland.
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8
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Eing M, Tuten BT, Blinco JP, Barner‐Kowollik C. Visible Light Activation of Spin‐Silenced Fluorescence. Chemistry 2018; 24:12246-12249. [DOI: 10.1002/chem.201800732] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Matthias Eing
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- Macromolecular Architectures Institut fur Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT) Engesserstr. 18 76128 Karlsruhe Germany
| | - Bryan T. Tuten
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
| | - James P. Blinco
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- Macromolecular Architectures Institut fur Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT) Engesserstr. 18 76128 Karlsruhe Germany
| | - Christopher Barner‐Kowollik
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- Macromolecular Architectures Institut fur Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT) Engesserstr. 18 76128 Karlsruhe Germany
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9
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Hansen KA, Blinco JP. Nitroxide radical polymers – a versatile material class for high-tech applications. Polym Chem 2018. [DOI: 10.1039/c7py02001e] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A comprehensive summary of synthetic strategies for the preparation of nitroxide radical polymer materials and a state-of-the-art perspective on their latest and most exciting applications.
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Affiliation(s)
- Kai-Anders Hansen
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
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10
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Prescott C, Bottle SE. Biological Relevance of Free Radicals and Nitroxides. Cell Biochem Biophys 2017; 75:227-240. [PMID: 27709467 DOI: 10.1007/s12013-016-0759-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 08/18/2016] [Indexed: 12/31/2022]
Abstract
Nitroxides are stable, kinetically-persistent free radicals which have been successfully used in the study and intervention of oxidative stress, a critical issue pertaining to cellular health which results from an imbalance in the levels of damaging free radicals and redox-active species in the cellular environment. This review gives an overview of some of the biological processes that produce radicals and other reactive oxygen species with relevance to oxidative stress, and then discusses interactions of nitroxides with these species in terms of the use of nitroxides as redox-sensitive probes and redox-active therapeutic agents.
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11
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Allen JP, Pfrunder MC, McMurtrie JC, Bottle SE, Blinco JP, Fairfull‐Smith KE. BODIPY‐Based Profluorescent Probes Containing
Meso
‐ and β‐Substituted Isoindoline Nitroxides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601280] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jesse P. Allen
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Michael C. Pfrunder
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - John C. McMurtrie
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Steven E. Bottle
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - James P. Blinco
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Kathryn E. Fairfull‐Smith
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
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12
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Mutlu H, Schmitt CW, Wedler-Jasinski N, Woehlk H, Fairfull-Smith KE, Blinco JP, Barner-Kowollik C. Spin fluorescence silencing enables an efficient thermally driven self-reporting polymer release system. Polym Chem 2017. [DOI: 10.1039/c7py01437f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A self-reporting profluorescent release system driven by the thermo-reversible dynamic covalent ligation of chromophores to polymer chain, whose fluorescence is silenced by unpaired spins of nitroxides prior to release is introduced.
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Affiliation(s)
- Hatice Mutlu
- Soft Matter Synthesis Laboratory
- Institute for Biological Interfaces (IBG 3)
- Karlsruhe Institute of Technology (KIT)
- 76344 Karlsruhe
- Germany
| | - Christian W. Schmitt
- Macromolecular Architectures
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
| | - Nils Wedler-Jasinski
- Macromolecular Architectures
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
| | - Hendrik Woehlk
- Macromolecular Architectures
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- QLD 4000
- Australia
| | - James P. Blinco
- Macromolecular Architectures
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
| | - Christopher Barner-Kowollik
- Soft Matter Synthesis Laboratory
- Institute for Biological Interfaces (IBG 3)
- Karlsruhe Institute of Technology (KIT)
- 76344 Karlsruhe
- Germany
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13
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Hansen KA, Fairfull-Smith KE, Bottle SE, Blinco JP. Development of a Redox-Responsive Polymeric Profluorescent Probe. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kai-Anders Hansen
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
| | - Kathryn E. Fairfull-Smith
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
| | - Steven E. Bottle
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
| | - James P. Blinco
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
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14
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Determination of relative positions and localizations of paramagnetic probe molecules in liquid crystal by analysis of concentration broadening of EPR spectra. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.05.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Bottle SE, Clement JL, Fleige M, Simpson EM, Guillaneuf Y, Fairfull-Smith KE, Gigmes D, Blinco JP. Light-active azaphenalene alkoxyamines: fast and efficient mediators of a photo-induced persistent radical effect. RSC Adv 2016. [DOI: 10.1039/c6ra18500b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Reported is the first example of an alkoxyamine that quantitatively yields a nitroxide upon light exposure. The alkoxyamine is used to generate a light driven persistent radical effect and applied to radical insertion, exchange and polymerization reactions.
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Affiliation(s)
- Steven E. Bottle
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | | | - Mirco Fleige
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | - Emily M. Simpson
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | | | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | - Didier Gigmes
- Aix Marseille Univ
- CNRS
- ICR UMR 7273
- 13397 Marseille
- France
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
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16
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Toledo H, Amar M, Bar S, Iron MA, Fridman N, Tumanskii B, Shimon LJW, Botoshansky M, Szpilman AM. Synthesis and stability of cyclic α-hydrogen nitroxides. Org Biomol Chem 2015; 13:10726-33. [PMID: 26356203 DOI: 10.1039/c5ob01443c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Nitroxides (nitroxyl radicals) hold a unique place in science due to their stable radical nature. We have recently reported the first design concept providing a general solution to the problem of designing and preparing monocyclic α-hydrogen nitroxides. The initial studies were limited to aryl derivatives. We now report a wider study showing that alkyl substituents may be employed as well. In addition, we report several additional examples of aryl substituents and reveal some of the structural limitations with regard to nitroxide stability as a function of the α-carbon substituent.
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Affiliation(s)
- Hila Toledo
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
| | - Michal Amar
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
| | - Sukanta Bar
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
| | - Mark A Iron
- Department of Chemical Research Support, Weizmann Institute of Science, Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
| | - Boris Tumanskii
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
| | - Linda J W Shimon
- Department of Chemical Research Support, Weizmann Institute of Science, Israel
| | - Mark Botoshansky
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
| | - Alex M Szpilman
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel.
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17
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Lederhose P, Haworth NL, Thomas K, Bottle SE, Coote ML, Barner-Kowollik C, Blinco JP. Design of Redox/Radical Sensing Molecules via Nitrile Imine-Mediated Tetrazole-ene Cycloaddition (NITEC). J Org Chem 2015; 80:8009-17. [DOI: 10.1021/acs.joc.5b01088] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Paul Lederhose
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
- Preparative
Macromolecular Chemistry, Institut für Technische Chemie und
Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76131 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Naomi L. Haworth
- ARC
Centre of Excellence for Electromaterials Science, Research School
of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
| | - Komba Thomas
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - Steven E. Bottle
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - Michelle L. Coote
- ARC
Centre of Excellence for Electromaterials Science, Research School
of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
| | - Christopher Barner-Kowollik
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
- Preparative
Macromolecular Chemistry, Institut für Technische Chemie und
Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76131 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - James P. Blinco
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
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18
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Dyar SM, Margulies EA, Horwitz NE, Brown KE, Krzyaniak MD, Wasielewski MR. Photogenerated Quartet State Formation in a Compact Ring-Fused Perylene-Nitroxide. J Phys Chem B 2015; 119:13560-9. [DOI: 10.1021/acs.jpcb.5b02378] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott M. Dyar
- Department of Chemistry and
Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Eric A. Margulies
- Department of Chemistry and
Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Noah E. Horwitz
- Department of Chemistry and
Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Kristen E. Brown
- Department of Chemistry and
Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Matthew D. Krzyaniak
- Department of Chemistry and
Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Michael R. Wasielewski
- Department of Chemistry and
Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
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19
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Amar M, Bar S, Iron MA, Toledo H, Tumanskii B, Shimon LJ, Botoshansky M, Fridman N, Szpilman AM. Design concept for α-hydrogen-substituted nitroxides. Nat Commun 2015; 6:6070. [DOI: 10.1038/ncomms7070] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Accepted: 12/09/2014] [Indexed: 12/12/2022] Open
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20
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Morris JC, Walsh LA, Gomes BA, Gigmes D, Fairfull-Smith KE, Bottle SE, Blinco JP. Photo-induced proton coupled electron transfer from a benzophenone ‘antenna’ to an isoindoline nitroxide. RSC Adv 2015. [DOI: 10.1039/c5ra20100d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
When exposed to light, a novel nitroxide-benzophenone hybrid will undergo an energy transfer process whereby the nitroxide enters an excited state which induces an efficient hydrogen atom transfer from unactivated alkanes.
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Affiliation(s)
- Jason C. Morris
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Liam A. Walsh
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Brunell A. Gomes
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Didier Gigmes
- Aix Marseille Université
- CNRS
- ICR UMR 7273
- 13397 Marseille
- France
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Steven E. Bottle
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
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21
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Simpson EM, Ristovski ZD, Bottle SE, Fairfull-Smith KE, Blinco JP. Modular design of profluorescent polymer sensors. Polym Chem 2015. [DOI: 10.1039/c5py00120j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Through orthogonal coupling chemistries, the synthesis of profluorescent nitroxide containing polymers for applications as radical or redox sensors is achieved.
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Affiliation(s)
- Emily M. Simpson
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Zoran D. Ristovski
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Steven E. Bottle
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
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22
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Bergner BJ, Hofmann C, Schürmann A, Schröder D, Peppler K, Schreiner PR, Janek J. Understanding the fundamentals of redox mediators in Li–O2 batteries: a case study on nitroxides. Phys Chem Chem Phys 2015; 17:31769-79. [DOI: 10.1039/c5cp04505c] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An electrochemical model is derived for the charging of Li–O2 batteries with dissolved redox mediators and applied to selected nitroxides.
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Affiliation(s)
- Benjamin J. Bergner
- Institute for Physical Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
| | - Christine Hofmann
- Institute of Organic Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
| | - Adrian Schürmann
- Institute for Physical Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
| | - Daniel Schröder
- Institute for Physical Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
| | - Klaus Peppler
- Institute for Physical Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
| | - Jürgen Janek
- Institute for Physical Chemistry
- Justus-Liebig University Giessen
- 35392 Giessen
- Germany
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23
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New developments in spin labels for pulsed dipolar EPR. Molecules 2014; 19:16998-7025. [PMID: 25342554 PMCID: PMC6271499 DOI: 10.3390/molecules191016998] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 10/07/2014] [Accepted: 10/13/2014] [Indexed: 11/17/2022] Open
Abstract
Spin labelling is a chemical technique that enables the integration of a molecule containing an unpaired electron into another framework for study. Given the need to understand the structure, dynamics, and conformational changes of biomacromolecules, spin labelling provides a relatively non-intrusive technique and has certain advantages over X-ray crystallography; which requires high quality crystals. The technique relies on the design of binding probes that target a functional group, for example, the thiol group of a cysteine residue within a protein. The unpaired electron is typically supplied through a nitroxide radical and sterically shielded to preserve stability. Pulsed electron paramagnetic resonance (EPR) techniques allow small magnetic couplings to be measured (e.g., <50 MHz) providing information on single label probes or the dipolar coupling between multiple labels. In particular, distances between spin labels pairs can be derived which has led to many protein/enzymes and nucleotides being studied. Here, we summarise recent examples of spin labels used for pulse EPR that serve to illustrate the contribution of chemistry to advancing discoveries in this field.
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24
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Toba R, Gotoh H, Sakakibara K. Scavenging and characterization of short-lived radicals using a novel stable nitroxide radical with a characteristic UV-vis absorption spectrum. Org Lett 2014; 16:3868-71. [PMID: 25019641 DOI: 10.1021/ol501328k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A stable tert-butyl(10-phenyl-9-anthryl)nitroxide (BPAN) radical was newly synthesized and used for the capture/characterization of reactive radicals. Adducts obtained from the reactions of BPAN with in situ generated reactive radicals showed excellent stability, assuring complete isolation and purification. The structures of the adducts were established by LC-MS and NMR analyses.
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Affiliation(s)
- Ryuta Toba
- Department of Applied Chemistry, Yokohama National University , 79-5 Tokiwadai, Hodogayaku, Yokohama 240-8501 Japan
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25
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Chumakova NA, Yankova TS, Fairfull-Smith KE, Bottle SE, Vorobiev AK. Molecular orientational order of nitroxide radicals in liquid crystalline media. J Phys Chem B 2014; 118:5589-99. [PMID: 24786911 DOI: 10.1021/jp411729j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The orientational distribution of a set of stable nitroxide radicals in aligned liquid crystals 5CB (nematic) and 8CB (smectic A) was studied in detail by numerical simulation of EPR spectra. The order parameters up to the 10th rank were measured. The directions of the principal orientation axes of the radicals were determined. It was shown that the ordering of the probe molecules is controlled by their interaction with the matrix molecules more than the inherent geometry of the probes themselves. The rigid fused phenanthrene-based (A5) and 2-azaphenalene (A4) nitroxides as well as the rigid core elongated C11 and 5α-cholestane (CLS) nitroxides were found to be most sensitive to the orientation of the liquid crystal matrixes.
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Affiliation(s)
- N A Chumakova
- Department of Chemistry, M. V. Lomonosov Moscow State University , Moscow 119991, Russian Federation
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26
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Mravljak J, Ojsteršek T, Pajk S, Sollner Dolenc M. Coumarin-based dual fluorescent spin-probes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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Fairfull-Smith KE, Debele EA, Allen JP, Pfrunder MC, McMurtrie JC. Direct Iodination of Isoindolines and Isoindoline Nitroxides as Precursors to Functionalized Nitroxides. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300313] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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28
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Khan N, Blinco JP, Bottle SE, Hosokawa K, Swartz HM, Micallef AS. The evaluation of new and isotopically labeled isoindoline nitroxides and an azaphenalene nitroxide for EPR oximetry. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2011; 211:170-7. [PMID: 21665499 PMCID: PMC3143274 DOI: 10.1016/j.jmr.2011.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 05/14/2011] [Accepted: 05/14/2011] [Indexed: 05/26/2023]
Abstract
Isoindoline nitroxides are potentially useful probes for viable biological systems, exhibiting low cytotoxicity, moderate rates of biological reduction and favorable Electron Paramagnetic Resonance (EPR) characteristics. We have evaluated the anionic (5-carboxy-1,1,3,3-tetramethylisoindolin-2-yloxyl; CTMIO), cationic (5-(N,N,N-trimethylammonio)-1,1,3,3-tetramethylisoindolin-2-yloxyl iodide, QATMIO) and neutral (1,1,3,3-tetramethylisoindolin-2-yloxyl; TMIO) nitroxides and their isotopically labeled analogs ((2)H(12)- and/or (2)H(12)-(15)N-labeled) as potential EPR oximetry probes. An active ester analogue of CTMIO, designed to localize intracellularly, and the azaphenalene nitroxide 1,1,3,3-tetramethyl-2,3-dihydro-2-azaphenalen-2-yloxyl (TMAO) were also studied. While the EPR spectra of the unlabeled nitroxides exhibit high sensitivity to O(2) concentration, deuteration resulted in a loss of superhyperfine features and a subsequent reduction in O(2) sensitivity. Labeling the nitroxides with (15)N increased the signal intensity and this may be useful in decreasing the detection limits for in vivo measurements. The active ester nitroxide showed approximately 6% intracellular localization and low cytotoxicity. The EPR spectra of TMAO nitroxide indicated an increased rigidity in the nitroxide ring, due to dibenzo-annulation.
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Affiliation(s)
- Nadeem Khan
- EPR Centre for Viable Systems, Department of Radiology, Dartmouth Medical School, Hanover, New Hampshire 03755, USA
| | - James P. Blinco
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Steven E. Bottle
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Kazuyuki Hosokawa
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Harold M. Swartz
- EPR Centre for Viable Systems, Department of Radiology, Dartmouth Medical School, Hanover, New Hampshire 03755, USA
| | - Aaron S. Micallef
- Australian Institute for Bioengineering and Nanotechnology and School of Chemistry and Molecular Biosciences, University of Queensland, St Lucia, Queensland 4072, Australia
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29
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Morris JC, McMurtrie JC, Bottle SE, Fairfull-Smith KE. Generation of Profluorescent Isoindoline Nitroxides Using Click Chemistry. J Org Chem 2011; 76:4964-72. [DOI: 10.1021/jo200613r] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jason C. Morris
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology and ‡Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - John C. McMurtrie
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology and ‡Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - Steven E. Bottle
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology and ‡Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - Kathryn E. Fairfull-Smith
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology and ‡Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, Queensland 4001, Australia
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30
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Patel B, Carlisle J, Bottle SE, Hanson GR, Kariuki BM, Male L, McMurtrie JC, Spencer N, Grainger RS. In search of a new class of stable nitroxide: synthesis and reactivity of a peri-substituted N,N-bissulfonylhydroxylamine. Org Biomol Chem 2011; 9:2336-44. [PMID: 21321769 DOI: 10.1039/c0ob00976h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Acyclic bissulfonylnitroxides have never been isolated, and degrade through fragmentation. In an approach to stabilising a bissulfonylnitroxide radical, the cyclic, peri-substituted N,N-bissulfonylhydroxylamine, 2-hydroxynaphtho[1,8-de][1,3,2]dithiazine 1,1,3,3-tetraoxide (1), has been prepared by formal nitrogen insertion into the sulfur-sulfur bond of a sulfinylsulfone, naphtho[1,8-cd][1,2]dithiole 1,1,2-trioxide. The heterocyclic ring of 1 is shown to adopt a sofa conformation by X-ray crystallography, with a pseudo-axial hydroxyl group. N,N-Bissulfonylhydroxylamine 1 displays high thermal, photochemical and hydrolytic stability compared to acyclic systems. EPR analysis reveals formation of the corresponding bissulfonylnitroxide 2 upon oxidation of 1 with the Ce(IV) salts CAN and CTAN. Although 2 does not undergo fragmentation, it cannot be isolated, since hydrogen atom abstraction to reform 1 occurs in situ. The stability and reactivity of 1 and 2 are compared with the known cyclic benzo-fused N,N-bissulfonylhydroxylamine, N-hydroxy-O-benzenedisulfonimide (6), for which the X-ray data, and EPR of the corresponding nitroxide 10, are also reported for the first time.
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Affiliation(s)
- Bhaven Patel
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, UK B15 2TT
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31
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Pajk S, Garvas M, Štrancar J, Pečar S. Nitroxide–fluorophore double probes: a potential tool for studying membrane heterogeneity by ESR and fluorescence. Org Biomol Chem 2011; 9:4150-9. [DOI: 10.1039/c0ob01173h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Colwell JM, Blinco JP, Hulbert C, Fairfull-Smith KE, Bottle SE. A Profluorescent Azaphenalene Nitroxide for Nitroxide-Mediated Polymerization. Aust J Chem 2011. [DOI: 10.1071/ch10404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel nitroxide‐mediated polymerization (NMP) control agent; 1,1,3,3‐tetramethyl‐2,3‐dihydro‐2‐azaphenalen‐2‐yloxyl (TMAO), was used in the free‐radical polymerization of styrene. The conversion of styrene during NMP was studied using FT‐Raman spectroscopy and the effectiveness of TMAO as a NMP control agent was assessed by GPC analysis. Fidelity of the TMAO‐alkoxyamine end‐group on the synthesized polymers was confirmed by GPC, UV‐Vis and fluorescence spectroscopic analyses. Comparison to the well known NMP control agent, TEMPO was made. TMAO showed control of molecular weight approaching that of TEMPO. Attempts to improve the properties of TMAO as an NMP control agent by synthesizing an analogue with bulkier substituents around the nitroxide did not generate the target molecule but demonstrated some of the interesting chemistry of the azaphenalene ring system.
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33
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Blinco JP, Fairfull-Smith KE, Morrow BJ, Bottle SE. Profluorescent Nitroxides as Sensitive Probes of Oxidative Change and Free Radical Reactions. Aust J Chem 2011. [DOI: 10.1071/ch10442] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This paper presents a review on the use of tethered nitroxide–fluorophore molecules as probes of oxidative change and free radical generation and reaction. The proximity of the nitroxide free radical to the fluorophore suppresses the normal fluorescence emission process. Nitroxide free radical scavenging, metabolism or redox chemistry return the system to its natural fluorescent state and so these tethered nitroxide–fluorophore molecules are described as being profluorescent. A survey of profluorescent nitroxides found in the literature is provided as well as background on the mechanism of action and applications of these compounds as fluorometric probes within the fields of biological, materials and environmental sciences.
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34
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Cimino P, Pedone A, Stendardo E, Barone V. Interplay of stereo-electronic, environmental, and dynamical effects in determining the EPR parameters of aromatic spin-probes: INDCO as a test case. Phys Chem Chem Phys 2010; 12:3741-6. [DOI: 10.1039/b924500f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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35
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Fairfull-Smith KE, Bottle SE. The Synthesis and Physical Properties of Novel Polyaromatic Profluorescent Isoindoline Nitroxide Probes. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800597] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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Blinco JP, Keddie DJ, Wade T, Barker PJ, George GA, Bottle SE. Profluorescent nitroxides: Sensors and stabilizers of radical-mediated oxidative damage. Polym Degrad Stab 2008. [DOI: 10.1016/j.polymdegradstab.2008.05.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Blinco JP, Hodgson JL, Morrow BJ, Walker JR, Will GD, Coote ML, Bottle SE. Experimental and Theoretical Studies of the Redox Potentials of Cyclic Nitroxides. J Org Chem 2008; 73:6763-71. [DOI: 10.1021/jo801099w] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James P. Blinco
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
| | - Jennifer L. Hodgson
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
| | - Benjamin J. Morrow
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
| | - James R. Walker
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
| | - Geoffrey D. Will
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
| | - Michelle L. Coote
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
| | - Steven E. Bottle
- Australian Research Council Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland, 4001, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT, 0200, Australia
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38
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Aliaga C, Juárez-Ruiz JM, Scaiano JC, Aspée A. Hydrogen-Transfer Reactions from Phenols to TEMPO Prefluorescent Probes in Micellar Systems. Org Lett 2008; 10:2147-50. [DOI: 10.1021/ol800446c] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carolina Aliaga
- Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago de Chile, Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Juan M. Juárez-Ruiz
- Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago de Chile, Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| | - J. C. Scaiano
- Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago de Chile, Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Alexis Aspée
- Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago de Chile, Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
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39
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Keddie DJ, Fairfull-Smith KE, Bottle SE. The palladium-catalysed copper-free Sonogashira coupling of isoindoline nitroxides: a convenient route to robust profluorescent carbon–carbon frameworks. Org Biomol Chem 2008; 6:3135-43. [DOI: 10.1039/b806963h] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Hodgson JL, Namazian M, Bottle SE, Coote ML. One-Electron Oxidation and Reduction Potentials of Nitroxide Antioxidants: A Theoretical Study. J Phys Chem A 2007; 111:13595-605. [DOI: 10.1021/jp074250e] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jennifer L. Hodgson
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, and Queensland University of Technology, Brisbane QLD 4000, Australia
| | - Mansoor Namazian
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, and Queensland University of Technology, Brisbane QLD 4000, Australia
| | - Steven E. Bottle
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, and Queensland University of Technology, Brisbane QLD 4000, Australia
| | - Michelle L. Coote
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, and Queensland University of Technology, Brisbane QLD 4000, Australia
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