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Mizuno A, Matsuoka R, Mibu T, Kusamoto T. Luminescent Radicals. Chem Rev 2024; 124:1034-1121. [PMID: 38230673 DOI: 10.1021/acs.chemrev.3c00613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Organic radicals are attracting increasing interest as a new class of molecular emitters. They demonstrate electronic excitation and relaxation dynamics based on their doublet or higher multiplet spin states, which are different from those based on singlet-triplet manifolds of conventional closed-shell molecules. Recent studies have disclosed luminescence properties and excited state dynamics unique to radicals, such as highly efficient electron-photon conversion in OLEDs, NIR emission, magnetoluminescence, an absence of heavy atom effect, and spin-dependent and spin-selective dynamics. These are difficult or sometimes impossible to achieve with closed-shell luminophores. This review focuses on luminescent organic radicals as an emerging photofunctional molecular system, and introduces the material developments, fundamental properties including luminescence, and photofunctions. Materials covered in this review range from monoradicals, radical oligomers, and radical polymers to metal complexes with radical ligands demonstrating radical-involved emission. In addition to stable radicals, transiently formed radicals generated in situ by external stimuli are introduced. This review shows that luminescent organic radicals have great potential to expand the chemical and spin spaces of luminescent molecular materials and thus broaden their applicability to photofunctional systems.
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Affiliation(s)
- Asato Mizuno
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Ryota Matsuoka
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, HayamaKanagawa 240-0193, Japan
| | - Takuto Mibu
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Tetsuro Kusamoto
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, HayamaKanagawa 240-0193, Japan
- JST-PRESTO, 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
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Superoxide Anion Chemistry-Its Role at the Core of the Innate Immunity. Int J Mol Sci 2023; 24:ijms24031841. [PMID: 36768162 PMCID: PMC9916283 DOI: 10.3390/ijms24031841] [Citation(s) in RCA: 35] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
Classically, superoxide anion O2•- and reactive oxygen species ROS play a dual role. At the physiological balance level, they are a by-product of O2 reduction, necessary for cell signalling, and at the pathological level they are considered harmful, as they can induce disease and apoptosis, necrosis, ferroptosis, pyroptosis and autophagic cell death. This revision focuses on understanding the main characteristics of the superoxide O2•-, its generation pathways, the biomolecules it oxidizes and how it may contribute to their modification and toxicity. The role of superoxide dismutase, the enzyme responsible for the removal of most of the superoxide produced in living organisms, is studied. At the same time, the toxicity induced by superoxide and derived radicals is beneficial in the oxidative death of microbial pathogens, which are subsequently engulfed by specialized immune cells, such as neutrophils or macrophages, during the activation of innate immunity. Ultimately, this review describes in some depth the chemistry related to O2•- and how it is harnessed by the innate immune system to produce lysis of microbial agents.
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Fedyushin PA, Serykh AA, Vinogradov AS, Mezhenkova TV, Platonov VE, Nasyrova DI, Samigullina AI, Fedin MV, Zayakin IA, Tretyakov EV. Biradical with a polyfluorinated terphenylene backbone. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3577-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Imran M, Taddei M, Sukhanov AA, Bussotti L, Ni W, Foggi P, Gurzadyan GG, Zhao J, Di Donato M, Voronkova VK. Radical-Enhanced Intersystem Crossing in Perylene-Oxoverdazyl Radical Dyads. Chemphyschem 2022; 23:e202100912. [PMID: 35191573 DOI: 10.1002/cphc.202100912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Indexed: 11/07/2022]
Abstract
Linking stable radicals to organic chromophores is an effective method to enhance the intersystem crossing (ISC) of chromophores. Herein we prepared perylene-oxoverdazyl dyads either by directly connecting the two units or using an intervening phenyl spacer. We investigated the effect of the radical on the photophysical properties of perylene and observed strong fluorescence quenching due to radical enhanced intersystem crossing (REISC). Compared with a previously reported perylene fused nitroxide radical compound (triplet lifetime = 0.1 µs), these new adducts show a longer-lived triplet excited state (9.5 µs). Based on the singlet oxygen quantum yield (7%), we propose that the radical enhanced internal conversion also plays a role in the relaxation of the excited state. Femtosecond fluorescence up-conversion indicates a fast decay of the excited state (<1.0 ps), suggesting a strong spin-spin exchange interaction between the two units. Femtosecond transient absorption (fs-TA) spectra confirmed direct triplet state population (within 0.5 ps). Interestingly, by fs-TA, we observed the interconversion of the two states (D1/Q1) at ~80 ps time scale. Time-resolved electron paramagnetic resonance (TREPR) spectral study confirmed the formation of the quartet sate , we observed triplet and quartet states simultaneously with weights of 0.7 and 0.3, respectively. DFT computations showed that the interaction between radical and chromophore is ferromagnetic ( J >0, 0.05~0.10 eV).
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Affiliation(s)
- Muhammad Imran
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian, 116024, P.R. China
| | - Maria Taddei
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy
| | - Andrey A Sukhanov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, 420029, Russia
| | - Laura Bussotti
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy
| | - Wenjun Ni
- Institute of Artificial Photosynthesis, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Ling-Gong Road, Dalian, 116024, P.R. China
| | - Paolo Foggi
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy
| | - Gagik G Gurzadyan
- Institute of Artificial Photosynthesis, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Ling-Gong Road, Dalian, 116024, P.R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian, 116024, P.R. China
| | - Mariangela Di Donato
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy
- ICCOM-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino (FI), Italy
| | - Violeta K Voronkova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, 420029, Russia
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Mutlu H. Chemical design and synthesis of macromolecular profluorescent nitroxide systems as self-reporting probes. Polym Chem 2022. [DOI: 10.1039/d1py01645h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The objective of this mini-review article is to highlight the importance of the chemical design towards the synthesis of polymeric profluorescent nitroxides applicable as self-reporting probes.
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Affiliation(s)
- Hatice Mutlu
- Soft Matter Synthesis Laboratory, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Tretyakov EV, Ovcharenko VI, Terent'ev AO, Krylov IB, Magdesieva TV, Mazhukin DG, Gritsan NP. Conjugated nitroxide radicals. RUSSIAN CHEMICAL REVIEWS 2022. [DOI: 10.1070/rcr5025] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fidan I, Onal E, Hirel C. Nitroxide radicals appended to phthalonitriles: synthesis, structural characterization and photophysical properties. Acta Crystallogr C 2021; 77:137-143. [DOI: 10.1107/s2053229621001832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/14/2021] [Indexed: 11/10/2022] Open
Abstract
The syntheses of 4-[4-(4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl-2-yl)phenoxy]phthalonitrile (3, C21H19N4O3) and 4-[4-(4,4,5,5-tetramethyl-2-imidazoline-1-oxyl-2-yl)phenoxy]phthalonitrile (4) were carried out by microwave-assisted nucleophilic aromatic substitution of 4-nitrophthalonitrile (2) by the pre-formed 2-(4-hydroxyphenyl)-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl (1). Compounds 3 and 4 were characterized unambiguously by a rich array of analyses, such as melting point, FT–IR, MALDI–TOF MS, elemental analysis, UV–Vis, CV, EPR, magnetic measurements and single-crystal X-ray diffraction. Structural studies demonstrate that the C—H...X and C—X...π (X = O and N) interactions in the radical nitronyl nitroxide groups play an important role in the assembly of the crystal structures. Moreover, cyclic voltammetry analyses show that the phthalonitrile substituent retains the redox properties of the Ullman radicals.
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Hussain M, Taddei M, Bussotti L, Foggi P, Zhao J, Liu Q, Di Donato M. Intersystem Crossing in Naphthalenediimide-Oxoverdazyl Dyads: Synthesis and Study of the Photophysical Properties. Chemistry 2019; 25:15615-15627. [PMID: 31596003 DOI: 10.1002/chem.201903814] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Indexed: 11/07/2022]
Abstract
Oxoverdazyl (Vz) radical units were covalently linked to the naphthalenediimide (NDI) chromophore to study the effect of the radical on the photophysical properties, especially the radical enhanced intersystem crossing (REISC), which is a promising approach to develop heavy-atom-free triplet photosensitizers. Rigid phenyl or ethynylphenyl linkers between the two moieties were used, thus REISC and formation of doublet (D1 , total spin quantum number S=1/2) and quartet states (Q1 , S=3/2) are anticipated. The photophysical properties of the dyads were studied with steady-state and femtosecond/nanosecond transient absorption (TA) spectroscopies and DFT computations. Femtosecond transient absorption spectra show a fast electron transfer (<150 fs), and ISC (ca. 1.4-1.85 ps) is induced by charge recombination (CR, in toluene). Nanosecond transient absorption spectra demonstrated a biexponential decay of the triplet state of the NDI moiety. The fast component (lifetime: 50 ns; population ratio: 80 %) is assigned to the D1 →D0 decay, and the slow decay component (2.0 μs; 20 %) to the Q1 →D0 ISC. DFT computations indicated ferromagnetic interactions between the radical and chromophore (J=0.07-0.13 eV). Reversible formation of the radical anion of the NDI moiety by photoreduction of the radical-NDI dyads in the presence of sacrificial electron donor triethanolamine (TEOA) is achieved. This work is useful for design of new triplet photosensitizers based on the REISC effect.
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Affiliation(s)
- Mushraf Hussain
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 LingGong Road, Dalian, 116024, P. R. China
| | - Maria Taddei
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy
| | - Laura Bussotti
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy
| | - Paolo Foggi
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy.,INO, Istituto Nazionale di Ottica Largo Enrico, Fermi 6, 50125, Florence, Italy.,Dipartimento di Chimica, Universita di Perugia, via Elce di Sotto 8, 06123, Perugia, Italy
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 LingGong Road, Dalian, 116024, P. R. China
| | - Qingyun Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Mariangela Di Donato
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019, Sesto Fiorentino, Italy.,INO, Istituto Nazionale di Ottica Largo Enrico, Fermi 6, 50125, Florence, Italy
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Haque MM, Murale DP, Kim YK, Lee JS. Crosstalk between Oxidative Stress and Tauopathy. Int J Mol Sci 2019; 20:ijms20081959. [PMID: 31013607 PMCID: PMC6514575 DOI: 10.3390/ijms20081959] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 04/16/2019] [Accepted: 04/19/2019] [Indexed: 12/11/2022] Open
Abstract
Tauopathy is a collective term for neurodegenerative diseases associated with pathological modifications of tau protein. Tau modifications are mediated by many factors. Recently, reactive oxygen species (ROS) have attracted attention due to their upstream and downstream effects on tauopathy. In physiological conditions, healthy cells generate a moderate level of ROS for self-defense against foreign invaders. Imbalances between ROS and the anti-oxidation pathway cause an accumulation of excessive ROS. There is clear evidence that ROS directly promotes tau modifications in tauopathy. ROS is also highly upregulated in the patients’ brain of tauopathies, and anti-oxidants are currently prescribed as potential therapeutic agents for tauopathy. Thus, there is a clear connection between oxidative stress (OS) and tauopathies that needs to be studied in more detail. In this review, we will describe the chemical nature of ROS and their roles in tauopathy.
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Affiliation(s)
- Md Mamunul Haque
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
| | - Dhiraj P Murale
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
| | - Yun Kyung Kim
- Bio-Med Division, KIST-School UST, Seoul 02792, Korea.
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Brain Science Institute (BSI), Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
| | - Jun-Seok Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
- Bio-Med Division, KIST-School UST, Seoul 02792, Korea.
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11
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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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Beldjoudi Y, Nascimento MA, Cho YJ, Yu H, Aziz H, Tonouchi D, Eguchi K, Matsushita MM, Awaga K, Osorio-Roman I, Constantinides CP, Rawson JM. Multifunctional Dithiadiazolyl Radicals: Fluorescence, Electroluminescence, and Photoconducting Behavior in Pyren-1'-yl-dithiadiazolyl. J Am Chem Soc 2018; 140:6260-6270. [PMID: 29688006 DOI: 10.1021/jacs.7b12592] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The pyren-1'-yl-functionalized dithiadiazolyl (DTDA) radical, C16H9CNSSN (1), is monomeric in solution and exhibits fluorescence in the deep-blue region of the visible spectrum (440 nm) upon excitation at 241 nm. The salt [1][GaCl4] exhibits similar emission, reflecting the largely spectator nature of the radical in the fluorescence process, although the presence of the radical leads to a modest quenching of emission (ΦF = 98% for 1+ and 50% for 1) through enhancement of non-radiative decay processes. Time-dependent density functional theory studies on 1 coupled with the similar emission profiles of both 1+ and 1 are consistent with the initial excitation being of predominantly pyrene π-π* character. Spectroscopic studies indicate stabilization of the excited state in polar media, with the fluorescence lifetime for 1 (τ = 5 ns) indicative of a short-lived excited state. Comparative studies between the energies of the frontier orbitals of pyren-1'-yl nitronyl nitroxide (2, which is not fluorescent) and 1 reveal that the energy mismatch and poor spatial overlap between the DTDA radical SOMO and the pyrene π manifold in 1 efficiently inhibit the non-radiative electron-electron exchange relaxation pathway previously described for 2. Solid-state films of both 1 and [1][GaCl4] exhibit broad emission bands at 509 and 545 nm, respectively. Incorporation of 1 within a host matrix for OLED fabrication revealed electroluminescence, with CIE coordinates of (0.205, 0.280) corresponding to a sky-blue emission. The brightness of the device reached 1934 cd/m2 at an applied voltage of 16 V. The crystal structure of 1 reveals a distorted π-stacked motif with almost regular distances between the pyrene rings but alternating long-short contacts between DTDA radicals. Solid state measurements on a thin film of 1 reveal emission occurs at shorter wavelengths (375 nm) whereas conductivity measurements on a single crystal of 1 show a photoconducting response at longer wavelength excitation (455 nm).
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Affiliation(s)
- Yassine Beldjoudi
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
| | - Mitchell A Nascimento
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
| | - Yong Joo Cho
- Department of Electrical & Computer Engineering, Waterloo Institute of Nanotechnology , University of Waterloo , 200 University Avenue West , Waterloo , ON N2L 3G1 , Canada
| | - Hyeonghwa Yu
- Department of Electrical & Computer Engineering, Waterloo Institute of Nanotechnology , University of Waterloo , 200 University Avenue West , Waterloo , ON N2L 3G1 , Canada
| | - Hany Aziz
- Department of Electrical & Computer Engineering, Waterloo Institute of Nanotechnology , University of Waterloo , 200 University Avenue West , Waterloo , ON N2L 3G1 , Canada
| | - Daiki Tonouchi
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Keitaro Eguchi
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Michio M Matsushita
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Kunio Awaga
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Igor Osorio-Roman
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
| | - Christos P Constantinides
- Department of Chemistry , North Caroline State University , 2620 Yarbrough Drive, Box 8204 , Raleigh , North Carolina 27695 , United States
| | - Jeremy M Rawson
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
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Liras M, Simoncelli S, Rivas-Aravena A, García O, Scaiano JC, Alarcon EI, Aspée A. Nitroxide amide-BODIPY probe behavior in fibroblasts analyzed by advanced fluorescence microscopy. Org Biomol Chem 2018; 14:4023-6. [PMID: 27065020 DOI: 10.1039/c6ob00533k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel synthesized nitroxide amide-BODIPY prefluorescent probe was used to study cellular redox balance that modulates nitroxide/hydroxylamine ratio in cultured human fibroblasts. FLIM quantitatively differentiated between nitroxide states of the cytoplasm-localized probe imaged by TIRF, monitoring nitroxide depletion by hydrogen peroxide; eluding incorrect interpretation if only fluorescence intensity is considered.
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Affiliation(s)
- M Liras
- Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas (ICTP-CSIC), Juan de la Cierva 3, 28006, Madrid, España and Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N6N5, Canada
| | - S Simoncelli
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N6N5, Canada and INQUIMAE and Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
| | - A Rivas-Aravena
- Laboratorio de Radiobiología Molecular y Celular, Departamento de Aplicaciones Nucleares, Comisión Chilena de Energía Nuclear, Santiago, Chile
| | - O García
- Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas (ICTP-CSIC), Juan de la Cierva 3, 28006, Madrid, España
| | - J C Scaiano
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N6N5, Canada
| | - E I Alarcon
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N6N5, Canada and Bio-nanomaterials Chemistry and Engineering Laboratory, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin St., Ottawa, Ontario K1Y 4W7, Canada.
| | - A Aspée
- Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago, Chile.
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Yang J, Cao Q, Hu WL, Ye RR, He L, Ji LN, Qin PZ, Mao ZW. Theranostic TEMPO-functionalized Ru(ii) complexes as photosensitizers and oxidative stress indicators. Dalton Trans 2017; 46:445-454. [DOI: 10.1039/c6dt04028d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New TEMPO-functionalized Ru(ii) polypyridyl complexes displayed greatly improved PDT efficacy, capable of simultaneously monitoring cellular oxidative stress during photodynamic therapy.
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Affiliation(s)
- Jing Yang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Qian Cao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Wei-Liang Hu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Rui-Rong Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Liang He
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Liang-Nian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Peter Z. Qin
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
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Kolanowski JL, Kaur A, New EJ. Selective and Reversible Approaches Toward Imaging Redox Signaling Using Small-Molecule Probes. Antioxid Redox Signal 2016; 24:713-30. [PMID: 26607478 DOI: 10.1089/ars.2015.6588] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE Recent research has identified key roles for reactive oxygen species (ROS)/reactive nitrogen species (RNS) in redox signaling, but much remains to be uncovered. Molecular imaging tools to study these processes must not only be selective to enable identification of the ROS/RNS involved but also reversible to distinguish signaling processes from oxidative stress. Fluorescent sensors offer the potential to image such processes with high spatial and temporal resolution. RECENT ADVANCES A broad array of strategies has been developed that enable the selective sensing of ROS/RNS. More recently, attention has turned to the design of reversible small-molecule sensors of global redox state, with a further set of probes capable of reversible sensing of individual ROS/RNS. CRITICAL ISSUES In this study, we discuss the key challenges in achieving simultaneous detection of reversible oxidative bursts with unambiguous determination of a particular ROS/RNS. FUTURE DIRECTIONS We have highlighted key design features of small-molecule probes that show promise in enabling the study of redox signaling, identifying essential parameters that must be assessed for any new probe. Antioxid. Redox Signal. 24, 713-730.
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Affiliation(s)
- Jacek L Kolanowski
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
| | - Amandeep Kaur
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
| | - Elizabeth J New
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
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16
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Nam H, Kwon JE, Choi MW, Seo J, Shin S, Kim S, Park SY. Highly Sensitive and Selective Fluorescent Probe for Ascorbic Acid with a Broad Detection Range through Dual-Quenching and Bimodal Action of Nitronyl-Nitroxide. ACS Sens 2016. [DOI: 10.1021/acssensors.5b00230] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Haerim Nam
- Center
for Supramolecular Optoelectronic Materials, Department of Materials
Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744 Korea
| | - Ji Eon Kwon
- Center
for Supramolecular Optoelectronic Materials, Department of Materials
Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744 Korea
| | - Min-Woo Choi
- Center
for Supramolecular Optoelectronic Materials, Department of Materials
Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744 Korea
| | - Jangwon Seo
- Center
for Supramolecular Optoelectronic Materials, Department of Materials
Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744 Korea
| | - Seunghoon Shin
- Center
for Supramolecular Optoelectronic Materials, Department of Materials
Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744 Korea
- Center
for Theragnosis, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seongbuk-gu, Seoul 136-791 Korea
| | - Sehoon Kim
- Center
for Theragnosis, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seongbuk-gu, Seoul 136-791 Korea
| | - Soo Young Park
- Center
for Supramolecular Optoelectronic Materials, Department of Materials
Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744 Korea
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17
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Barzegar Amiri Olia M, Zavras A, Schiesser CH, Alexander SA. Blue ‘turn-on’ fluorescent probes for the direct detection of free radicals and nitric oxide in Pseudomonas aeruginosa biofilms. Org Biomol Chem 2016; 14:2272-81. [DOI: 10.1039/c5ob02441b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Novel blue cell-permeable ‘turn-on’ fluorescent probes have been developed to visualize and quantify nitric oxide and free radical formation and reaction within aPseudomonas aeruginosabiofilm.
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Affiliation(s)
- Mina Barzegar Amiri Olia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
| | - Athanasios Zavras
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
| | - Carl H. Schiesser
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
| | - Stefanie-Ann Alexander
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
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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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Challenges and advances in quantum dot fluorescent probes to detect reactive oxygen and nitrogen species: A review. Anal Chim Acta 2015; 862:1-13. [DOI: 10.1016/j.aca.2014.08.036] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 08/13/2014] [Accepted: 08/15/2014] [Indexed: 01/04/2023]
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20
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Sowers MA, McCombs JR, Wang Y, Paletta JT, Morton SW, Dreaden EC, Boska MD, Ottaviani MF, Hammond PT, Rajca A, Johnson JA. Redox-responsive branched-bottlebrush polymers for in vivo MRI and fluorescence imaging. Nat Commun 2014; 5:5460. [PMID: 25403521 DOI: 10.1038/ncomms6460] [Citation(s) in RCA: 199] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 10/02/2014] [Indexed: 12/15/2022] Open
Abstract
Stimuli-responsive multimodality imaging agents have broad potential in medical diagnostics. Herein, we report the development of a new class of branched-bottlebrush polymer dual-modality organic radical contrast agents--ORCAFluors--for combined magnetic resonance and near-infrared fluorescence imaging in vivo. These nitroxide radical-based nanostructures have longitudinal and transverse relaxation times that are on par with commonly used heavy-metal-based magnetic resonance imaging (MRI) contrast agents. Furthermore, these materials display a unique compensatory redox response: fluorescence is partially quenched by surrounding nitroxides in the native state; exposure to ascorbate or ascorbate/glutathione leads to nitroxide reduction and a concomitant 2- to 3.5-fold increase in fluorescence emission. This behaviour enables correlation of MRI contrast, fluorescence intensity and spin concentration with tissues known to possess high concentrations of ascorbate in mice. Our in vitro and in vivo results, along with our modular synthetic approach, make ORCAFluors a promising new platform for multimodality molecular imaging.
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Affiliation(s)
- Molly A Sowers
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Jessica R McCombs
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Ying Wang
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - Joseph T Paletta
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - Stephen W Morton
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Erik C Dreaden
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Michael D Boska
- Department of Radiology, University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - M Francesca Ottaviani
- Department of Earth, Life and Environmental Sciences, University of Urbino, Loc. Corcicchia, 61029 Urbino, Italy
| | - Paula T Hammond
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Andrzej Rajca
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - Jeremiah A Johnson
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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21
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Han H, Wang M, Wang H. 1-Nitronyl nitroxide pyrene as a new off–on fluorescent chemosensor for Cu2+. NEW J CHEM 2014. [DOI: 10.1039/c4nj00012a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly selective and sensitive colorimetric chemosensor based on nitronyl nitroxide was developed for detection of Cu2+.
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Affiliation(s)
- Huifei Han
- Department of Chemistry
- China Agricultural University
- Beijing 100193, P.R. China
| | - Mian Wang
- Department of Chemistry
- China Agricultural University
- Beijing 100193, P.R. China
| | - Hongmei Wang
- Department of Chemistry
- China Agricultural University
- Beijing 100193, P.R. China
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22
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Liu H, Zhang L, Chen J, Zhai Y, Zeng Y, Li L. A novel functional imidazole fluorescent ionic liquid: simple and efficient fluorescent probes for superoxide anion radicals. Anal Bioanal Chem 2013; 405:9563-70. [DOI: 10.1007/s00216-013-7357-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 08/27/2013] [Accepted: 09/09/2013] [Indexed: 11/25/2022]
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23
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Murale DP, Kim H, Choi WS, Churchill DG. Highly Selective Excited State Intramolecular Proton Transfer (ESIPT)-Based Superoxide Probing. Org Lett 2013; 15:3946-9. [DOI: 10.1021/ol4017222] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dhiraj P. Murale
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea, and Department of Anatomy and Neurobiology, Medical Research, Center for Neural Dysfunction, Institute of Health Science, School of Medicine, Gyeongsang National University, 92 Chilam-dong, Jinju, Gyeongnam 660-751, Republic of Korea
| | - Hwajin Kim
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea, and Department of Anatomy and Neurobiology, Medical Research, Center for Neural Dysfunction, Institute of Health Science, School of Medicine, Gyeongsang National University, 92 Chilam-dong, Jinju, Gyeongnam 660-751, Republic of Korea
| | - Wan Sung Choi
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea, and Department of Anatomy and Neurobiology, Medical Research, Center for Neural Dysfunction, Institute of Health Science, School of Medicine, Gyeongsang National University, 92 Chilam-dong, Jinju, Gyeongnam 660-751, Republic of Korea
| | - David G. Churchill
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea, and Department of Anatomy and Neurobiology, Medical Research, Center for Neural Dysfunction, Institute of Health Science, School of Medicine, Gyeongsang National University, 92 Chilam-dong, Jinju, Gyeongnam 660-751, Republic of Korea
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24
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Affiliation(s)
- Yuming Yang
- Department of Chemistry and State Key Laboratory
of Molecular Engineering of Polymers and Institutes of Biomedical
Sciences, Fudan University, Shanghai 200433, P. R. China
| | - Qiang Zhao
- Key Laboratory for Organic Electronics
and Information Displays (KLOEID) and Institute of Advanced Materials
(IAM), Nanjing University of Posts and Telecommunications, Nanjing
210046, P. R. China
| | - Wei Feng
- Department of Chemistry and State Key Laboratory
of Molecular Engineering of Polymers and Institutes of Biomedical
Sciences, Fudan University, Shanghai 200433, P. R. China
| | - Fuyou Li
- Department of Chemistry and State Key Laboratory
of Molecular Engineering of Polymers and Institutes of Biomedical
Sciences, Fudan University, Shanghai 200433, P. R. China
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25
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Ahn HY, Fairfull-Smith K, Morrow BJ, Lussini V, Kim B, Bondar MV, Bottle S, Belfield KD. Two-photon fluorescence microscopy imaging of cellular oxidative stress using profluorescent nitroxides. J Am Chem Soc 2012; 134:4721-30. [PMID: 22380794 PMCID: PMC3303203 DOI: 10.1021/ja210315x] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Indexed: 12/14/2022]
Abstract
A range of varying chromophore nitroxide free radicals and their nonradical methoxyamine analogues were synthesized and their linear photophysical properties examined. The presence of the proximate free radical masks the chromophore's usual fluorescence emission, and these species are described as profluorescent. Two nitroxides incorporating anthracene and fluorescein chromophores (compounds 7 and 19, respectively) exhibited two-photon absorption (2PA) cross sections of approximately 400 G.M. when excited at wavelengths greater than 800 nm. Both of these profluorescent nitroxides demonstrated low cytotoxicity toward Chinese hamster ovary (CHO) cells. Imaging colocalization experiments with the commercially available CellROX Deep Red oxidative stress monitor demonstrated good cellular uptake of the nitroxide probes. Sensitivity of the nitroxide probes to H(2)O(2)-induced damage was also demonstrated by both one- and two-photon fluorescence microscopy. These profluorescent nitroxide probes are potentially powerful tools for imaging oxidative stress in biological systems, and they essentially "light up" in the presence of certain species generated from oxidative stress. The high ratio of the fluorescence quantum yield between the profluorescent nitroxide species and their nonradical adducts provides the sensitivity required for measuring a range of cellular redox environments. Furthermore, their reasonable 2PA cross sections provide for the option of using two-photon fluorescence microscopy, which circumvents commonly encountered disadvantages associated with one-photon imaging such as photobleaching and poor tissue penetration.
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Affiliation(s)
- Hyo-Yang Ahn
- Department
of Chemistry, and CREOL, The College of Optics and Photonics, University of Central Florida, P.O. Box 162366, Orlando,
Florida 32816-2366, United States
| | - Kathryn
E. Fairfull-Smith
- ARC Centre of Excellence for Free
Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, GPO Box 2434,
Brisbane, QLD, 4001, Australia
| | - Benjamin J. Morrow
- ARC Centre of Excellence for Free
Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, GPO Box 2434,
Brisbane, QLD, 4001, Australia
| | - Vanessa Lussini
- ARC Centre of Excellence for Free
Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, GPO Box 2434,
Brisbane, QLD, 4001, Australia
| | - Bosung Kim
- Department
of Chemistry, and CREOL, The College of Optics and Photonics, University of Central Florida, P.O. Box 162366, Orlando,
Florida 32816-2366, United States
| | - Mykhailo V. Bondar
- Institute of Physics, National Academy of Sciences, Prospect Nauki 46, Kiev
03028, Ukraine
| | - Steven
E. Bottle
- ARC Centre of Excellence for Free
Radical Chemistry and Biotechnology, Faculty of Science and Technology, Queensland University of Technology, GPO Box 2434,
Brisbane, QLD, 4001, Australia
| | - Kevin D. Belfield
- Department
of Chemistry, and CREOL, The College of Optics and Photonics, University of Central Florida, P.O. Box 162366, Orlando,
Florida 32816-2366, United States
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26
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Vaz MGF, Allão RA, Akpinar H, Schlueter JA, Santos S, Lahti PM, Novak MA. Magnetic Mn and Co complexes with a large polycyclic aromatic substituted nitronylnitroxide. Inorg Chem 2012; 51:3138-45. [PMID: 22356306 DOI: 10.1021/ic202623p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2-(1'-Pyrenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (PyrNN) was reacted with M(hfac)(2) (M = Mn(II) and Co(II), hfac = hexafluoracetylacetonate) to give two isostructural ML(2) stoichiometry M(hfac)(2)(PyrNN)(2) complexes and a ML stoichiometry one-dimensional (1-D) polymer chain complex [Mn(hfac)(2)(PyrNN)]. The ML(2) complexes have similar crystal structures with monoclinic unit cells, in which one NO unit from each PyrNN ligand is bonded to the transition metal on cis vertices of a distorted octahedron. The major magnetic interactions are intracomplex metal-to-radical exchange (J), and intermolecular exchange across a close contact between the uncoordinated NO units (J'). For M = Mn(II) an approximate chain model fit gives g = 2.0, J = (-)125 cm(-1) and J' = (-)49 cm(-1); for M = Co(II), g = 2.4, J = (-)180 cm(-1), and J' = (-)70 cm(-1). Hybrid density functional theory (DFT) computations modeling the intermolecular exchange by using only the radical units across the close contact are in good accord with the estimated values of J'. The chain type complex structure shows solvent incorporation for overall structure [Mn(hfac)(2)(PyrNN)](n)·0.5(CHCl(3))·0.5(C(7)H(16)). Both NO groups of the PyrNN ligand are complexed to form helical chains, with very strong metal to radical antiferromagnetic exchange that gives overall ferrimagnetic behavior.
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Affiliation(s)
- Maria G F Vaz
- Instituto de Química, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil.
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27
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Borozdina YB, Kamm V, Laquai F, Baumgarten M. Tuning the sensitivity of fluorophore–nitroxide radicals. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31390a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Matveeva AG, Glebov EM, Korolev VV, Pozdnyakov IP, Plyusnin VF, Stass DV, Reznikov VA. Luminescent properties of new naphthylnitroxyl radicals. HIGH ENERGY CHEMISTRY 2011. [DOI: 10.1134/s0018143911050134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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29
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Colvin MT, Smeigh AL, Giacobbe EM, Conron SMM, Ricks AB, Wasielewski MR. Ultrafast Intersystem Crossing and Spin Dynamics of Zinc meso-Tetraphenylporphyrin Covalently Bound to Stable Radicals. J Phys Chem A 2011; 115:7538-49. [DOI: 10.1021/jp2021006] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael T. Colvin
- Department of Chemistry and Argonne−Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Amanda L. Smeigh
- Department of Chemistry and Argonne−Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Emilie M. Giacobbe
- Department of Chemistry and Argonne−Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Sarah M. Mickley Conron
- Department of Chemistry and Argonne−Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Annie Butler Ricks
- 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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Wang Y, Jiang X, Liu J, Zhao M, Kang G, Wu J, Peng L, Peng S. HPLC-MS aided PC12 cell systems: to quantitatively monitor the conversion of nitronyl nitroxide in biological systems with and without NO. MOLECULAR BIOSYSTEMS 2011; 7:1678-83. [PMID: 21403950 DOI: 10.1039/c1mb05037k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitronyl nitroxides are capable of preventing cells, tissues, and organs from radical-induced damage through scavenging NO˙, ˙O(2)(-) and ˙OH. In order to explore the conversions of nitronyl nitroxides in biological systems with and without NO˙, HPLC-MS aided PC12 cell systems were developed, and the conversions of 2-(3'-nitrophenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl -3-oxide (3-nitro-PTIO), 1-oxyl-2-(3'-nitrophenyl)-4,4,5,5-tetramethylimidazoline (3-nitro-PTI), and 1-hydroxyl-2-(3'-nitrophenyl)-4,4,5,5-tetramethylimidazoline (3-nitro-PTIH) were quantitatively monitored. In these systems 3-nitro-PTIO and 3-nitro-PTI were time-dependently converted to 3-nitro-PTIH, while no conversion of 3-nitro-PTIH was detected. Free radical NO˙ donors (sodium nitroprusside, SNP) accelerated the conversions, but had no effect upon the conversion product. In the in vitro and in vivo assays the 3-nitro-PTIH treated cells and mice exhibited no toxic response.
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Affiliation(s)
- Yuji Wang
- College of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, PR China
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31
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Wang H, Jing L, Xiang Z, Liu P, Sun X, Jiang R. Synthesis and Fluorescence Tuning of Novel Nitroxides with a Binaphthyl Framework. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20100142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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32
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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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33
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Chen X, Tian X, Shin I, Yoon J. Fluorescent and luminescent probes for detection of reactive oxygen and nitrogen species. Chem Soc Rev 2011; 40:4783-804. [DOI: 10.1039/c1cs15037e] [Citation(s) in RCA: 818] [Impact Index Per Article: 62.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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34
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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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35
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Intra- and intermolecular quenching of carbazole photoluminescence by imidazolidine radicals. Russ Chem Bull 2010. [DOI: 10.1007/s11172-010-0160-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Kobayashi H, Ogawa M, Alford R, Choyke PL, Urano Y. New strategies for fluorescent probe design in medical diagnostic imaging. Chem Rev 2010; 110:2620-40. [PMID: 20000749 PMCID: PMC3241938 DOI: 10.1021/cr900263j] [Citation(s) in RCA: 1509] [Impact Index Per Article: 107.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hisataka Kobayashi
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892-1088, USA.
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Tansakul C, Lilie E, Walter ED, Rivera F, Wolcott A, Zhang JZ, Millhauser GL, Braslau R. Distance-dependent Fluorescence Quenching and Binding of CdSe Quantum Dots by Functionalized Nitroxide Radicals. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2010; 114:7793-7805. [PMID: 20473339 PMCID: PMC2867053 DOI: 10.1021/jp1005023] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Quantum dot (QD) fluorescence is effectively quenched at low concentration by nitroxides bearing amine or carboxylic acid ligands. The association constants and fluorescence quenching of CdSe QDs with these derivatized nitroxides have been examined using electron paramagnetic resonance (EPR) and fluorescence spectroscopy. The EPR spectra in the non-protic solvent toluene are extremely sensitive to intermolecular and intramolecular hydrogen bonding of the functionalized nitroxides. Fluorescence measurements show that quenching of QD luminescence is nonlinear, with a strong dependence on the distance between the radical and the QD. The quenched fluorescence is restored when the surface-bound nitroxides are converted to hydroxylamines by mild reducing agents, or trapped by carbon radicals to form alkoxyamines. EPR studies indicate that photoreduction of the nitroxide occurs in toluene solution upon photoexcitation at 365 nm. However, photolysis in benzene solution gives no photoreduction, suggesting that photoreduction in toluene is independent of the quenching mechanism. The fluorescence quenching of QDs by nitroxide binding is a reversible process.
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Affiliation(s)
- Chittreeya Tansakul
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064 USA
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Colvin MT, Giacobbe EM, Cohen B, Miura T, Scott AM, Wasielewski MR. Competitive Electron Transfer and Enhanced Intersystem Crossing in Photoexcited Covalent TEMPO−Perylene-3,4:9,10-bis(dicarboximide) Dyads: Unusual Spin Polarization Resulting from the Radical−Triplet Interaction. J Phys Chem A 2010; 114:1741-8. [DOI: 10.1021/jp909212c] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Michael T. Colvin
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113
| | - Emilie M. Giacobbe
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113
| | - Boiko Cohen
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113
| | - Tomoaki Miura
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113
| | - Amy M. Scott
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113
| | - Michael R. Wasielewski
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113
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Berliner LJ. From spin-labeled proteins to in vivo EPR applications. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2009; 39:579-88. [DOI: 10.1007/s00249-009-0534-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 08/08/2009] [Accepted: 08/14/2009] [Indexed: 11/29/2022]
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Giacobbe EM, Mi Q, Colvin MT, Cohen B, Ramanan C, Scott AM, Yeganeh S, Marks TJ, Ratner MA, Wasielewski MR. Ultrafast Intersystem Crossing and Spin Dynamics of Photoexcited Perylene-3,4:9,10-bis(dicarboximide) Covalently Linked to a Nitroxide Radical at Fixed Distances. J Am Chem Soc 2009; 131:3700-12. [DOI: 10.1021/ja808924f] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Emilie M. Giacobbe
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Qixi Mi
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Michael T. Colvin
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Boiko Cohen
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Charusheela Ramanan
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Amy M. Scott
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Sina Yeganeh
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Tobin J. Marks
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Mark A. Ratner
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
| | - Michael R. Wasielewski
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113
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Sato S, Tsunoda M, Suzuki M, Kutsuna M, Takido-uchi K, Shindo M, Mizuguchi H, Obara H, Ohya H. Synthesis and spectral properties of polymethine-cyanine dye-nitroxide radical hybrid compounds for use as fluorescence probes to monitor reducing species and radicals. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 71:2030-2039. [PMID: 18790663 DOI: 10.1016/j.saa.2008.07.045] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2008] [Revised: 07/24/2008] [Accepted: 07/27/2008] [Indexed: 05/26/2023]
Abstract
Various hybrid compounds comprised of two types of nitroxide radicals and either a pentamethine (Cy5) or trimethine cyanine (Cy3) were synthesized. The nitroxide radicals were linked either via an ester-bond to one or two N-alkyl carboxyl-terminated groups of Cy5, or via two amido-bonds (aminocarbonyl or carbonylamino group) to the 5-position of the indolenine moieties of Cy5 and Cy3. Changes in fluorescence and ESR intensities of the hybrid compounds were measured before and after addition of Na ascorbate in PBS (pH 7.0) to reduce the radicals. Among the hybrid compounds synthesized, those that linked the nitroxide radicals via an aminocarbonyl residue at the 5-position of the indolenine moieties on Cy5 and Cy3 exhibited a 1.8- and 5.1-fold increase in fluorescence intensity with the reduction of the nitroxide segment by the addition of Na ascorbate, respectively. In contrast, fluorescence intensity was not enhanced in the other hybrid compounds. Thus, the hybrid compounds which exhibited an increase in fluorescent intensity with radical reduction can be used in the quantitative measurement of reducing species such as Fe(2+) and ascorbic acid, and hydroxyl radicals. Because these hybrid compounds have the advantage of fluorescing at longer wavelengths-661 (Cy5) or 568 (Cy3)nm, respectively, they can be used to measure radical-reducing species or radicals either in solution or in vivo.
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Affiliation(s)
- Shingo Sato
- Graduate School of Science and Engineering, Yamagata University, Yonezawa-shi, Yamagata 992-8510, Japan.
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Likhtenshtein GI. Novel Fluorescent Methods for Biotechnological and Biomedical Sensoring: Assessing Antioxidants, Reactive Radicals, NO Dynamics, Immunoassay, and Biomembranes Fluidity. Appl Biochem Biotechnol 2008; 152:135-55. [DOI: 10.1007/s12010-008-8219-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2008] [Accepted: 03/10/2008] [Indexed: 10/21/2022]
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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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Matveeva AG, Sviridenko FB, Korolev VV, Kuibida LV, Stass DV, Shundrin LA, Reznikov VA, Grampp GG. Difficulties in building radiation-generated three-spin systems using spin-labeled luminophores. J Phys Chem A 2008; 112:183-93. [PMID: 18088106 DOI: 10.1021/jp076835e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aromatic compounds are well-known acceptors of primary radical ions that are formed under high-energy irradiation of nonpolar systems. Thus formed radical ion pairs recombine and produce magnetosensitive fluorescence, which helps study the short-lived radical ions. It was initially suggested that a simple introduction of a spin label into the original arene would allow an easy transition from two-spin to three-spin systems, retaining the experimental techniques available for radical pairs. However, it turned out that spin-labeled arenes often do not produce magnetosensitive fluorescence in the conditions of a conventional radiochemical experiment. To understand the effect of the introduced spin label, we synthesized a series of compounds with the general structure "stable 3-imidazoline radical-two-carbon bridge-naphthalene" as well as their diamagnetic analogues. By use of this set of acceptors, we determined the processes that ruin the observed signal and established their connection with the chemical structure of the compound. We found that the compounds with flexible (saturated) two-carbon bridges between the luminophore and the stable radical moieties exist in solution in folded conformation, which leads to suppression of luminescence from naphthalene due to efficient through-space exchange quenching of the excited state by the radical. Increasing the rigidity of the bridge by introducing the double bond drastically increases the reactivity of the extended pi-system. In these compounds, the energy released upon recombination is spent in radiationless processes of chemical transformations both at the stage of the radical ion and at the stage of the electronically excited molecule.
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Affiliation(s)
- Anna G Matveeva
- Institute of Chemical Kinetics and Combustion SB RAS, ul. Institutskaya, 3, 630090 Novosibirsk, Russia
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Likhtenstein GI, Ishii K, Nakatsuji S. Dual chromophore-nitroxides: novel molecular probes, photochemical and photophysical models and magnetic materials. Photochem Photobiol 2007; 83:871-81. [PMID: 17645658 DOI: 10.1111/j.1751-1097.2007.00141.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Over the last decades scientists have faced growing requirements in novel methods of fast and sensitive analysis of antioxidant status of biological systems, spin redox probing and spin trapping, investigation of molecular dynamics, and of convenient models for studies of photophysical and photochemical processes. In approaching this problem, methods based upon the use of dual chromophore-nitroxide (CN) compounds have been suggested and developed. A CN consists of two molecular sub-functionality (a chromophore and a stable nitroxide radical) tethered together by spacers. In the dual compound the nitroxide is a strong intramolecular quencher of the fluorescence from the chromophore fragment. Reduction to hydroxylamine, oxidation of the nitroxide fragment or addition of an active radical yield the fluorescence increase and the parallel decay of the fragment electron spin resonance (ESR) signal. At certain conditions the dual molecules undergo photomagnetic switching and form excited state multi-spin systems. These unique properties of CN were intensively exploited as the basis for several methodologies, which include molecular probing, modeling intramolecular photochemical and photophysical processes, and construction of new magnetic materials.
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Soh N. Recent advances in fluorescent probes for the detection of reactive oxygen species. Anal Bioanal Chem 2006; 386:532-43. [PMID: 16609844 DOI: 10.1007/s00216-006-0366-9] [Citation(s) in RCA: 237] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2006] [Accepted: 02/15/2006] [Indexed: 10/24/2022]
Abstract
Reactive oxygen species (ROS) have captured the interest of many researchers in the chemical, biological, and medical fields since they are thought to be associated with various pathological conditions. Fluorescent probes for the detection of ROS are promising tools with which to enhance our understanding of the physiological roles of ROS, because they provide spatial and temporal information about target biomolecules in in vivo cellular systems. ROS probes, designed to detect specific ROS with a high selectivity, would be desirable, since it is now becoming clear that each ROS has its own unique physiological activity. However, dihydro-compounds such as 2',7'-dichlorodihydrofluorescein (DCFH), which have traditionally been used for detecting ROS, tend to react with a wide variety of ROS and are not completely photostable. Some attractive fluorescent probes that exhibit a high degree of selectivity toward specific ROS have recently been reported, and these selective probes are expected to have great potential for elucidating unknown physiological mechanisms associated with their target ROS. This review focuses on the design, detection mechanism, and performance of fluorescent probes for the detection of singlet oxygen ((1)O(2)), hydrogen peroxide (H(2)O(2)), hydroxyl radicals ((.)OH), or superoxide anion (O(2) (-.)), a field in which remarkable progress has been achieved in the last few years.
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Affiliation(s)
- Nobuaki Soh
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan.
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Ziyatdinova GK, Voloshin AV, Gilmutdinov AK, Budnikov HC, Ganeev TS. Application of constant-current coulometry for estimation of plasma total antioxidant capacity and its relationship with transition metal contents. J Pharm Biomed Anal 2006; 40:958-63. [PMID: 16242890 DOI: 10.1016/j.jpba.2005.08.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Revised: 08/16/2005] [Accepted: 08/17/2005] [Indexed: 11/23/2022]
Abstract
Simple and express coulometric method for the evaluation of the total antioxidant capacity (TAC) of human plasma based on the reaction with electrogenerated bromine is applied. TAC of plasma from patients with different ethiology of chronic renal failure was observed. The levels of antioxidant capacity for venous and arterial plasma are authentically different (15+/-1 kCl/L versus 11.7+/-0.7 kCl/L, p<0.01). The application of Vitamin E and ximedon as an antioxidant treatment significantly increase TAC level of plasma. Free liposoluble antioxidants in plasma in alpha-tocopherol units was determined. Redox potential of plasma is measured and its correlation with lg(TAC) is obtained. Transition metal contents of Fe, Cu, Mn, Ni, and Cr in plasma of patients with chronic renal failure is significantly higher than that for a control group. Correlation analysis has shown negative linear regression between TAC value and transition metals concentration in plasma. This confirms interrelation of processes with participation of free radicals, antioxidants and transition metals as donors of electrons in chain radical processes. Moreover, it shows utility of common parameters, TAC for example, for estimation of efficiency of antioxidant defense system in living organism, in particular its antioxidant status.
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Affiliation(s)
- Guzel K Ziyatdinova
- Department of Analytical Chemistry, A.M. Butlerov Chemical Institute, Kazan State University, Kremlyevskaya 18, Kazan 420008, Russia.
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Kálai T, Jekő J, Hideg K. Synthesis of a paramagnetic boronic acid as a useful synthetic building block and carbohydrate affinity spin probe. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.09.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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