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Popova VG, Kulik LV, Samoilova RI, Stass DV, Kokovkin VV, Glebov EM, Berezin AS, Novikov AS, Garcia A, Tuan HT, Rodriguez RD, Sokolov MN, Abramov PA. Noncovalent Dualism in Perylene-Diimide-Based Keggin Anion Complexes: Theoretical and Experimental studies. Inorg Chem 2023; 62:19677-19689. [PMID: 37977192 DOI: 10.1021/acs.inorgchem.3c03030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
We report the synthesis and comprehensive characterization of organic-inorganic hybrid salts formed by bis-cationic N,N'-bis(2-(trimethylammonium)ethylene)perylene-3,4,9,10-tetracarboxylic acid bisimide (PTCD2+) and Keggin-type [XW12O40]n- (X = Si, n = 4; X = P, n = 3) polyoxometalates. (PTCD)3[PW12O40]2·3DMSO·2H2O (2) and (PTCD)2[SiW12O40]·DMSO·2H2O (3) were structurally characterized by single crystal X-ray diffraction. The cations in both structures exhibited infinite chainlike arrangements through π-π interactions, contrasting with the previously reported cation-anion stacking observed in naphthalene diimide derivatives. A detailed theoretical study employing topological analysis of the electron density distribution within the quantum theory of atoms in molecules approach provided further insights into this structural dualism. Atomic force microscopy analyses revealed the formation of self-assembled supramolecular structures on graphite from molecular monolayers (3 nm of thick) to submicrometer aggregates for 2. Hyperspectral Raman spectroscopy imaging revealed that such heterostructures are likely formed by an enhanced π-π interactions. Both complexes demonstrated interesting electrochemical behavior, photoluminescence and X-ray-induced luminescence. Electron spin resonance analysis confirmed charge separation in both compounds, with enhanced efficiency observed in compound 2. Our findings of these perylene-based organic-inorganic hybrid salts offer the potential for their application in optoelectronic devices and functional materials.
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Affiliation(s)
- Victoria G Popova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad Lavrentiev Avenue, Novosibirsk 630090, Russia
- Novosibirsk State University, 2 Pirogova Street, Novosibirsk 630090, Russia
| | - Leonid V Kulik
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3, Novosibirsk 630090, Russia
| | - Rimma I Samoilova
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3, Novosibirsk 630090, Russia
| | - Dmitri V Stass
- Novosibirsk State University, 2 Pirogova Street, Novosibirsk 630090, Russia
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3, Novosibirsk 630090, Russia
| | - Vasily V Kokovkin
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Evgeni M Glebov
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3, Novosibirsk 630090, Russia
| | - Alexey S Berezin
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab., 7/9, Saint Petersburg 199034, Russia
- Research Institute of Chemistry, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street, 6, Moscow 117198, Russia
| | - Aura Garcia
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634034, Russia
| | - Hoang Tran Tuan
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634034, Russia
| | - Raul D Rodriguez
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634034, Russia
| | - Maxim N Sokolov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Pavel A Abramov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad Lavrentiev Avenue, Novosibirsk 630090, Russia
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634034, Russia
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2
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Marchuk MV, Vorotnikova NA, Vorotnikov YA, Kuratieva NV, Stass DV, Shestopalov MA. Correction: Optical property trends in a family of {Mo 6I 8} aquahydroxo complexes. Dalton Trans 2023; 52:15132. [PMID: 37830437 DOI: 10.1039/d3dt90178e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Correction for 'Optical property trends in a family of {Mo6I8} aquahydroxo complexes' by Margarita V. Marchuk et al., Dalton Trans., 2021, 50, 8794-8802, https://doi.org/10.1039/D1DT01293B.
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Affiliation(s)
- Margarita V Marchuk
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Natalya A Vorotnikova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Yuri A Vorotnikov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Natalia V Kuratieva
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Dmitri V Stass
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya Str., Novosibirsk, 630090, Russian Federation
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russian Federation
| | - Michael A Shestopalov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
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Nikul'shin PV, Fedunov RG, Kuibida LV, Maksimov AM, Glebov EM, Stass DV. Recombination of X-ray-Generated Radical Ion Pairs in Alkane Solution Assembles Optically Inaccessible Exciplexes from a Series of Perfluorinated para-Oligophenylenes with N, N-Dimethylaniline. Int J Mol Sci 2023; 24:ijms24087568. [PMID: 37108728 PMCID: PMC10142361 DOI: 10.3390/ijms24087568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/14/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
We demonstrate that a series of perfluorinated para-oligophenylenes C6F5-(C6F4)n-C6F5 (n = 1-3) produce exciplexes with N,N-dimethylaniline (DMA) in degassed X-irradiated n-dodecane solutions. The optical characterization of the compounds shows that their short fluorescence lifetimes (ca. 1.2 ns) and UV-Vis absorption spectra, overlapping with the spectrum of DMA with molar absorption coefficients of 2.7-4.6 × 104 M-1cm-1, preclude the standard photochemical exciplex formation pathway via selective optical generation of the local excited state of the donor and its bulk quenching by the acceptor. However, under X-rays, the efficient assembly of such exciplexes proceeds via the recombination of radical ion pairs, which delivers the two partners close to each other and ensures a sufficient energy deposition. The exciplex emission is completely quenched by the equilibration of the solution with air, providing a lower bound of exciplex emission lifetime of ca. 200 ns. The recombination nature of the exciplexes is confirmed by the magnetic field sensitivity of the exciplex emission band inherited from the magnetic field sensitivity from the recombination of spin-correlated radical ion pairs. Exciplex formation in such systems is further supported by DFT calculations. These first exciplexes from fully fluorinated compounds show the largest known red shift of the exciplex emission from the local emission band, suggesting the potential of perfluoro compounds for optimizing optical emitters.
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Affiliation(s)
- Pavel V Nikul'shin
- A.V. Topchiev Institute of Petrochemical Synthesis, 119991 Moscow, Russia
| | - Roman G Fedunov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, 630090 Novosibirsk, Russia
| | - Leonid V Kuibida
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, 630090 Novosibirsk, Russia
| | - Alexander M Maksimov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, 630090 Novosibirsk, Russia
| | - Evgeni M Glebov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, 630090 Novosibirsk, Russia
- Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Dmitri V Stass
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, 630090 Novosibirsk, Russia
- International Tomography Center, 630090 Novosibirsk, Russia
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4
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Evtushok DV, Sukhikh TS, Ivanov AA, Gayfulin YM, Eltsov IV, Stass DV, Ryadun AA, Zubareva AP, Shestopalov MA. Improved Synthesis of (TBA) 2[W 6Br 14] Paving the Way to Further Study of Bromide Cluster Complexes. Inorg Chem 2023; 62:4934-4946. [PMID: 36920338 DOI: 10.1021/acs.inorgchem.2c04426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Octahedral cluster complexes of molybdenum and tungsten, [M6X8Y6]n- (M = Mo, W; X, Y = Cl, Br, I), are promising active components in various fields, including biomedicine and solar energy. Cluster complexes draw considerable attention due to their X-ray opacity, red/near-IR luminescence, and ability to convert triplet molecular oxygen to active singlet oxygen under UV and visible irradiation. Among the octahedral cluster complexes of molybdenum and tungsten, compounds with a {W6Br8}4+ core are the least studied. There are only a few examples of compounds with substituted terminal ligands, and their properties are not well understood. Among other things, this is due to more labor-intensive and expensive methods for obtaining the starting compounds in comparison with molybdenum counterparts. In this paper, we describe the synthesis of an octahedral cluster complex, (TBA)2[W6Br14] (TBA+ = tetrabutylammonium), in gram quantities, starting from simple substances─W, Br2, and Bi─in 70% yield. The formation of pentanuclear tungsten cluster complexes was recorded as a byproduct. Compounds with substituted terminal ligands (TBA)2[W6Br8Y6] (Y = NO3, Cl, I) were obtained. We also discuss the instability of (TBA)2[W6Br8(NO3)6] under light exposure, the optical properties of a series of compounds (TBA)2[W6Br8Y6] (Y = Cl, Br, I), and the effect of terminal ligands on the chemical shifts in 183W NMR spectra in dimethyl sulfoxide-d6. The presented approach to the synthesis of one of the main precursors of various bromide cluster complexes on a gram scale can stimulate the study of their properties and development of new functional materials based on them.
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Affiliation(s)
- Darya V Evtushok
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Taisiya S Sukhikh
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Anton A Ivanov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Yakov M Gayfulin
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Ilia V Eltsov
- Novosibirsk State University, 1 Pirogova Str., Novosibirsk 630090, Russian Federation
| | - Dmitri V Stass
- Novosibirsk State University, 1 Pirogova Str., Novosibirsk 630090, Russian Federation.,Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Institutskaya Street, Novosibirsk 630090, Russia
| | - Alexey A Ryadun
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Anna P Zubareva
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Michael A Shestopalov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences (SB RAS), 3 Academician Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
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5
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Baranov AY, Rakhmanova MI, Hei X, Samsonenko DG, Stass DV, Bagryanskaya IY, Ryzhikov MR, Fedin VP, Li J, Artem'ev AV. A new subclass of copper(I) hybrid emitters showing TADF with near-unity quantum yields and a strong solvatochromic effect. Chem Commun (Camb) 2023; 59:2923-2926. [PMID: 36799209 DOI: 10.1039/d3cc00119a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We introduce here a new subclass of copper(I) hybrid emitters simultaneously containing [CuxIy]z- anions and Cu+ cations, separated in space by a Janus head ligand. When UV-irradiated at 298 K, these unique "Two-In-One" hybrids exhibit a short-lived green TADF with near-unity quantum yield and a strong solvatochromic effect. Moreover, they manifest a strong radioluminescence upon X-ray irradiation. These findings open up new possibilities for the design of highly performing TADF materials.
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Affiliation(s)
- Andrey Yu Baranov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Mariana I Rakhmanova
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Xiuze Hei
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA.
| | - Denis G Samsonenko
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Dmitri V Stass
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya St., Novosibirsk 630090, Russia.,Department of Physics, Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090, Russia
| | - Irina Yu Bagryanskaya
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia
| | - Maxim R Ryzhikov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Vladimir P Fedin
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Jing Li
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA.
| | - Alexander V Artem'ev
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
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6
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Artem'ev AV, Doronina EP, Rakhmanova MI, Hei X, Stass DV, Tarasova OA, Bagryanskaya IY, Samsonenko DG, Novikov AS, Nedolya NA, Li J. A family of CuI-based 1D polymers showing colorful short-lived TADF and phosphorescence induced by photo- and X-ray irradiation. Dalton Trans 2023; 52:4017-4027. [PMID: 36880169 DOI: 10.1039/d3dt00035d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Exploiting 2-(alkylsulfonyl)pyridines as 1,3-N,S-ligands, herein we have constructed 1D CuI-based coordination polymers (CPs) bearing unprecedented (CuI)n chains and possessing remarkable photophysical properties. At room temperature, these CPs show efficient TADF, phosphorescence or dual emission in the deep-blue to red range with outstandingly short decay times of 0.4-2.0 μs and good quantum performance. Owing to great structural diversity, the CPs demonstrate a variety of emissive mechanisms, spanning from TADF of 1(M + X)LCT type to 3CC and 3(M + X)LCT phosphorescence. Moreover, the designed compounds emit strong X-ray radioluminescence with the quantum efficiency of up to an impressive 55% relative to all-inorganic BGO scintillators. The presented findings push the boundaries in designing TADF and triplet emitters with very short decay times.
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Affiliation(s)
- Alexander V Artem'ev
- Nikolaev Institute of Inorganic Chemistry, SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia.
| | - Evgeniya P Doronina
- A. E. Favorsky Irkutsk Institute of Chemistry, SB RAS, 1 Favorsky Str., Irkutsk, 664033 Russia
| | - Mariana I Rakhmanova
- Nikolaev Institute of Inorganic Chemistry, SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia.
| | - Xiuze Hei
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA.
| | - Dmitri V Stass
- V. V. Voevodsky Institute of Chemical Kinetics and Combustion, SB RAS, 3 Institutskaya Str., Novosibirsk, 630090, Russia.,Department of Physics, Novosibirsk State University, 2 Pirogova St., Novosibirsk, 630090, Russia
| | - Ol'ga A Tarasova
- A. E. Favorsky Irkutsk Institute of Chemistry, SB RAS, 1 Favorsky Str., Irkutsk, 664033 Russia
| | - Irina Yu Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, SB RAS, 9 Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Denis G Samsonenko
- Nikolaev Institute of Inorganic Chemistry, SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia.
| | - Alexander S Novikov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russia.,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russia
| | - Nina A Nedolya
- A. E. Favorsky Irkutsk Institute of Chemistry, SB RAS, 1 Favorsky Str., Irkutsk, 664033 Russia
| | - Jing Li
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA.
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7
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Bardin VA, Vorotnikov YA, Stass DV, Vorotnikova NA, Shestopalov MA. Oxygen-Sensitive Photo- and Radioluminescent Polyurethane Nanoparticles Modified with Octahedral Iodide Tungsten Clusters. Nanomaterials (Basel) 2022; 12:3580. [PMID: 36296769 PMCID: PMC9608458 DOI: 10.3390/nano12203580] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
The development of cancer treatment techniques able to cure tumors located deep in the body is an urgent task for scientists and physicians. One of the most promising methods is X-ray-induced photodynamic therapy (X-PDT), since X-rays have unlimited penetration through tissues. In this work, octahedral iodide tungsten clusters, combining the properties of a scintillator and photosensitizer, are considered as a key component of nanosized polyurethane (pU) particles in the production of materials promising for X-PDT. Cluster-containing pU nanoparticles obtained here demonstrate bright photo- and X-ray-induced emission in both solid and water dispersion, great efficiency in the generation of singlet oxygen, and high sensitivity regarding photoluminescence intensity in relation to oxygen concentration. Additionally, incorporation of the cluster complex into the pU matrix greatly increases its stability against hydrolysis in water and under X-rays.
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Affiliation(s)
- Vyacheslav A. Bardin
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
| | - Yuri A. Vorotnikov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
| | - Dmitri V. Stass
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya St., 630090 Novosibirsk, Russia
- Department of Physics, Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
| | - Natalya A. Vorotnikova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
| | - Michael A. Shestopalov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
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8
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Zayakin IA, Korlyukov AA, Gorbunov DE, Gritsan NP, Akyeva AY, Syroeshkin MA, Stass DV, Tretyakov EV, Egorov MP. Au–Au Chemical Bonding in Nitronyl Nitroxide Gold(I) Derivatives. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Igor A. Zayakin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Avenue 47, Moscow 119991, Russian Federation
| | - Alexander A. Korlyukov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova Street 28, Moscow 119991, Russian Federation
| | - Dmitry E. Gorbunov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, 3 Institutskaya Street, Novosibirsk 630090, Russian Federation
- A.V. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Nina P. Gritsan
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, 3 Institutskaya Street, Novosibirsk 630090, Russian Federation
| | - Anna Ya. Akyeva
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Avenue 47, Moscow 119991, Russian Federation
| | - Mikhail A. Syroeshkin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Avenue 47, Moscow 119991, Russian Federation
| | - Dmitri V. Stass
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, 3 Institutskaya Street, Novosibirsk 630090, Russian Federation
| | - Evgeny V. Tretyakov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Avenue 47, Moscow 119991, Russian Federation
| | - Mikhail P. Egorov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Avenue 47, Moscow 119991, Russian Federation
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9
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Sergeeva SV, Petrovsky DV, Kobzeva TV, Stass DV. Escherichia coli JM109 in LB as a model bacterial system to study magnetic field effect in recombination of non-correlated pair of biologically relevant radicals nitric oxide and superoxide anion in high magnetic fields. Biophys J 2022. [DOI: 10.1016/j.bpj.2021.11.734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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10
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Morozova OB, Stass DV, Yurkovskaya AV. Kinetic evidence for the transiently shifted acidity constant of histidine linked to paramagnetic tyrosine probed by intramolecular electron transfer in oxidized peptides. Phys Chem Chem Phys 2021; 23:16698-16706. [PMID: 34338250 DOI: 10.1039/d1cp02408f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of electron transfer (ET) from tyrosine (Tyr) to short-lived histidine (His) radicals in peptides of different structures was monitored using time-resolved chemically induced dynamic nuclear polarization (CIDNP) to follow the reduction of the His radicals using NMR detection of the diamagnetic hyperpolarized reaction products. In aqueous solution over a wide pH range, His radicals were generated in situ in the photo-induced reaction with the photosensitizer, 3,3',4,4'-tetracarboxy benzophenone. Model simulations of the CIDNP kinetics provided pH-dependent rate constants of intra- and intermolecular ET, and the pH dependencies of the reaction under study were interpreted in terms of protonation states of the reactants and the product, His with either protonated or neutral imidazole. In some cases, an increase of pKa of imidazole in the presence of the short-lived radical center at a nearby Tyr residue was revealed. Interpretation of the obtained pH dependencies made is possible to quantify the degree of paramagnetic shift of the acidity constant of the imidazole of the His residue in the peptides with a Tyr residue in its paramagnetic state, and to correlate this degree with the intramolecular ET rate constant - a higher intramolecular ET rate constant corresponded to a greater acidity constant shift.
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Affiliation(s)
- Olga B Morozova
- International Tomography Center, Institutskaya 3a, 630090 Novosibirsk, Russia.
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11
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Marchuk MV, Vorotnikova NA, Vorotnikov YA, Kuratieva NV, Stass DV, Shestopalov MA. Optical property trends in a family of {Mo 6I 8} aquahydroxo complexes. Dalton Trans 2021; 50:8794-8802. [PMID: 34095938 DOI: 10.1039/d1dt01293b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Luminescence is one of the key properties of octahedral molybdenum cluster complexes and the basis for most areas of their possible practical applications. Nevertheless, the factors affecting the optical properties of the clusters are insufficiently studied and establishing them will allow us to tune both absorption and emission more precisely. In this work, we obtained two new cationic [{Mo6I8}(H2O)4(OH)2](An)2·nH2O (An = NO3-, n = 3; An = OTs-, n = 2, OTs- - p-toluenesulfonate), and two neutral [{Mo6I8}(H2O)2(OH)4]·nH2O (n = 2, 12) aquahydroxo complexes. Due to the similar compositions of the clusters obtained, we determined the influence of crystal packing and ligand environment on the absorption and photo- and radioluminescence properties. Thus, the four-component nature of the cluster emission was established using Gaussian deconvolution of the photoluminescence spectra. It was shown that the influence of both ligand type and crystal density decreases when moving to the red (lower-energy) part of the spectra, with only the first two components located in the blue (higher-energy) part of the spectra being strongly affected. Also, it was found that protonation of two hydroxo ligands leads to a significant decrease in absorption in the visible spectral region.
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Affiliation(s)
- Margarita V Marchuk
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Natalya A Vorotnikova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Yuri A Vorotnikov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Natalia V Kuratieva
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
| | - Dmitri V Stass
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya Str., Novosibirsk, 630090, Russian Federation and Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russian Federation
| | - Michael A Shestopalov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation.
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12
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Tretyakov EV, Petunin PV, Zhivetyeva SI, Gorbunov DE, Gritsan NP, Fedin MV, Stass DV, Samoilova RI, Bagryanskaya IY, Shundrina IK, Bogomyakov AS, Kazantsev MS, Postnikov PS, Trusova ME, Ovcharenko VI. Platform for High-Spin Molecules: A Verdazyl-Nitronyl Nitroxide Triradical with Quartet Ground State. J Am Chem Soc 2021; 143:8164-8176. [PMID: 34019759 DOI: 10.1021/jacs.1c02938] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thermally resistant air-stable organic triradicals with a quartet ground state and a large energy gap between spin states are still unique compounds. In this work, we succeeded to design and prepare the first highly stable triradical, consisting of oxoverdazyl and nitronyl nitroxide radical fragments, with a quartet ground state. The triradical and its diradical precursor were synthesized via a palladium-catalyzed cross-coupling reaction of diiodoverdazyl with nitronyl nitroxide-2-ide gold(I) complex. Both paramagnetic compounds were fully characterized by single-crystal X-ray diffraction analysis, superconducting quantum interference device magnetometry, EPR spectroscopy in various matrices, and cyclic voltammetry. In the diradical, the verdazyl and nitronyl nitroxide centers demonstrated full reversibility of redox process, while for the triradical, the electrochemical reduction and oxidation proceed at practically the same redox potentials, but become quasi-reversible. A series of high-level CASSCF/NEVPT2 calculations was performed to predict inter- and intramolecular exchange interactions in crystals of di- and triradicals and to establish their magnetic motifs. Based on the predicted magnetic motifs, the temperature dependences of the magnetic susceptibility were analyzed, and the singlet-triplet (135 ± 10 cm-1) and doublet-quartet (17 ± 2 and 152 ± 19 cm-1) splitting was found to be moderate. Unique high stability of synthesized verdazyl-nitronylnitroxide triradical opens new perspectives for further functionalization and design of high-spin systems with four or more spins.
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Affiliation(s)
- Evgeny V Tretyakov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Ave. 47, Moscow 119991, Russian Federation
| | - Pavel V Petunin
- Tomsk Polytechnic University, Lenin Ave. 30, Tomsk 634050, Russian Federation
| | - Svetlana I Zhivetyeva
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Ac. Lavrentiev Ave. 9, Novosibirsk 630090, Russian Federation
| | - Dmitry E Gorbunov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3, Novosibirsk 630090, Russian Federation
| | - Nina P Gritsan
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3, Novosibirsk 630090, Russian Federation
| | - Matvey V Fedin
- International Tomography Center, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3a, Novosibirsk 630090, Russian Federation
| | - Dmitri V Stass
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3, Novosibirsk 630090, Russian Federation.,Novosibirsk State University, Pirogova Str. 2, Novosibirsk 630090, Russian Federation
| | - Rimma I Samoilova
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3, Novosibirsk 630090, Russian Federation
| | - Irina Yu Bagryanskaya
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Ac. Lavrentiev Ave. 9, Novosibirsk 630090, Russian Federation
| | - Inna K Shundrina
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Ac. Lavrentiev Ave. 9, Novosibirsk 630090, Russian Federation
| | - Artem S Bogomyakov
- International Tomography Center, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3a, Novosibirsk 630090, Russian Federation
| | - Maxim S Kazantsev
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Ac. Lavrentiev Ave. 9, Novosibirsk 630090, Russian Federation
| | - Pavel S Postnikov
- Tomsk Polytechnic University, Lenin Ave. 30, Tomsk 634050, Russian Federation
| | - Marina E Trusova
- Tomsk Polytechnic University, Lenin Ave. 30, Tomsk 634050, Russian Federation
| | - Victor I Ovcharenko
- International Tomography Center, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3a, Novosibirsk 630090, Russian Federation
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13
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Kirakci K, Pozmogova TN, Protasevich AY, Vavilov GD, Stass DV, Shestopalov MA, Lang K. A water-soluble octahedral molybdenum cluster complex as a potential agent for X-ray induced photodynamic therapy. Biomater Sci 2021; 9:2893-2902. [PMID: 33464243 DOI: 10.1039/d0bm02005b] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
X-ray-induced photodynamic therapy (X-PDT) has recently evolved into a suitable modality to fight cancer. This technique, which exploits radiosensitizers producing reactive oxygen species, allows for a reduction of the radiation dose needed to eradicate cancer in the frame of the radiotherapy treatment of deep tumors. The use of transition metal complexes able to directly produce singlet oxygen, O2(1Δg), upon X-ray irradiation constitutes a promising route towards the optimization of the radiosensitizer's architecture. In our endeavour to conceive pertinent agents for X-PDT, we designed an octahedral molybdenum cluster complex (Mo6) with iodine inner ligands, and carboxylated apical ligands bearing ethylene oxide organic functions. The sodium salt of this complex is highly soluble in aqueous media and displays red luminescence which is efficiently quenched by oxygen to produce O2(1Δg) in a high quantum yield. Furthermore, due to its high radiodensity, the complex exhibits radioluminescence in aqueous media, with the same spectral features as for photoluminescence, indicating the production of O2(1Δg) upon X-ray irradiation. The uptake of the complex by Hep-2 and MRC-5 cells is negligible during the first hours of incubation, then considerably increases in connection with the hydrolysis of the apical ligands. The complex exhibits low toxicity in vitro and induces a radiotoxic effect, noticeable against cancerous Hep-2 cells but negligible against normal MRC-5 cells, at X-ray doses that do not affect cell viability otherwise. The first evaluation of in vivo toxicity of an Mo6 complex on a mouse model evidences a moderate and delayed toxic effect on kidneys, with an intravenous LD50 value of 390 ± 30 mg kg-1, possibly connected with hydrolysis-induced aggregation of the complex. Overall, this complex displays attractive features as a singlet oxygen radiosensitizer for X-PDT, highlighting the potential of transition metal cluster complexes towards this modality.
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Affiliation(s)
- Kaplan Kirakci
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, ŘeŽ 1001, 250 68 Husinec-ŘeŽ, Czech Republic.
| | - Tatiana N Pozmogova
- SPF-vivarium, Institute of Cytology and Genetics, SB RAS, 10 Acad. Lavrentieva ave., 630090, Novosibirsk, Russia and Novosibirsk State University, 1 Pirogova st., 630090, Novosibirsk, Russia
| | - Andrey Y Protasevich
- Nikolaev Institute of Inorganic Chemistry SB RAS, RAS, 3 Acad. Lavrentiev ave., 630090, Novosibirsk, Russia
| | - Georgy D Vavilov
- National Medical Research Center for Circulation Pathology n.a. academician E.N. Meshalkin, 15, Rechkunovskaya st., 630055, Novosibirsk, Russia
| | - Dmitri V Stass
- Novosibirsk State University, 1 Pirogova st., 630090, Novosibirsk, Russia and Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya st., 630090, Novosibirsk, Russia
| | - Michael A Shestopalov
- Nikolaev Institute of Inorganic Chemistry SB RAS, RAS, 3 Acad. Lavrentiev ave., 630090, Novosibirsk, Russia
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, ŘeŽ 1001, 250 68 Husinec-ŘeŽ, Czech Republic.
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14
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Shmakova AA, Sukhikh TS, Volchek VV, Yanshole V, Stass DV, Filatov EY, Glebov EM, Abramov PA, Sokolov MN. Niobium uptake by {P2W12} polyoxoanion with [NbO(C2O4)2(H2O)2]− as Nb source. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Stass DV. On algebraic properties of the sub-block of zero field hyperfine Hamiltonian with penultimate total spin projection for arbitrary hyperfine structure, and field dependence of radical pair recombination probability in the vicinity of zero field. J Chem Phys 2019; 151:184112. [DOI: 10.1063/1.5127217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Dmitri V. Stass
- Voevodsky Institute of Chemical Kinetics and Combustion, 630090 Novosibirsk, Russia and Novosibirsk State University, 630090 Novosibirsk, Russia
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16
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Mironova AD, Mikhajlov MA, Sukhikh TS, Brylev KA, Gushchin AL, Eltsov IV, Stass DV, Goryunov EI, Brel VK, Sokolov MN. Synthesis, Structure, and Luminescence Properties of a {Mo 6
I 8
} Complex with (C 6
F 5
) 2
PO 2
Ligands. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alina D. Mironova
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
| | - Maxim A. Mikhajlov
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
- Novosibirsk State University; Novosibirsk 630090 Russian Federation
| | - Taisiya S. Sukhikh
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
| | - Konstantin A. Brylev
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
- Novosibirsk State University; Novosibirsk 630090 Russian Federation
| | - Artem L. Gushchin
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
- Novosibirsk State University; Novosibirsk 630090 Russian Federation
| | - Ilia V. Eltsov
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
- Novosibirsk State University; Novosibirsk 630090 Russian Federation
| | - Dmitri V. Stass
- Novosibirsk State University; Novosibirsk 630090 Russian Federation
- Voevodsky Institute of Chemical Kinetics and Combustion; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
| | - Evgeny I. Goryunov
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow 119991 Russian Federation
| | - Valery K. Brel
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow 119991 Russian Federation
| | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry; Russian Academy of Sciences; Siberian Branch Novosibirsk 630090 Russian Federation
- Novosibirsk State University; Novosibirsk 630090 Russian Federation
- Kazan Federal University; Kazan 420008 Russian Federation
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17
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Mikhaylov MA, Mironova AD, Brylev KA, Sukhikh TS, Eltsov IV, Stass DV, Gushchin AL, Kitamura N, Sokolov MN. Functionalization of [Re 6Q 8(CN) 6] 4− clusters by methylation of cyanide ligands. NEW J CHEM 2019. [DOI: 10.1039/c9nj02971k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Methylation of anionic cluster complexes [Re6Q8(CN)6]4− with ((CH3)3O)BF4 or CF3SO3CH3 afforded homoleptic isonitrile cluster complexes [Re6Q8(CH3NC)6]2+ (Q = S, Se, Te).
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Affiliation(s)
| | - Alina D. Mironova
- Nikolaev Institute of Inorganic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | - Konstantin A. Brylev
- Nikolaev Institute of Inorganic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | - Taisiya S. Sukhikh
- Nikolaev Institute of Inorganic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | | | - Dmitri V. Stass
- Novosibirsk State University
- 630090 Novosibirsk
- Russia
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk
| | - Artem L. Gushchin
- Nikolaev Institute of Inorganic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | - Noboru Kitamura
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- 060-0810 Sapporo
- Japan
| | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
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18
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Abstract
Addition of 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen) or 2-aminopyridine (2-NH2-py) to aqueous solutions of (NH4)[NbO(C2O4)2(H2O)2]·3H2O (Nb-Ox) yields tris-oxalate complexes (bpyH2)(bpyH)[NbO(C2O4)3]·2H2O (1), (phenH)3[NbO(C2O4)3]·3H2O (2), and (2-NH2-pyH)3[NbO(C2O4)3]·2H2O (3), which were characterised by XRD, IR and EA. Bipyridinium salt 1 demonstrates remarkable photoactivity even under irradiation by daylight. The nature of the photoactivity was studied by diffuse reflectance (DR) spectroscopy, ESR and quantum-chemical calculations.
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Affiliation(s)
- Alexandra A Shmakova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad. Lavrentiev Ave, 630090 Novosibirsk, Russia.
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19
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Melnikov AR, Davydova MP, Sherin PS, Korolev VV, Stepanov AA, Kalneus EV, Benassi E, Vasilevsky SF, Stass DV. X-ray Generated Recombination Exciplexes of Substituted Diphenylacetylenes with Tertiary Amines: A Versatile Experimental Vehicle for Targeted Creation of Deep-Blue Electroluminescent Systems. J Phys Chem A 2018; 122:1235-1252. [PMID: 29283574 DOI: 10.1021/acs.jpca.7b11634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Customizable and technology-friendly functional materials are one of the mainstays of emerging organic electronics and optoelectronics. We show that recombination exciplexes of simple substituted diphenylacetylenes with tertiary amines can be a convenient source of tunable deep-blue emission with possible applications in organic electroluminescent systems. The optically inaccessible exciplexes were produced via recombination of radiation-generated radical ion pairs in alkane solution, which mimics charge transport and recombination in the active layer of practical organic light-emitting diodes in a simple solution-based experiment. Despite varying and rather poor intrinsic emission properties, diphenylacetylene and its prototypical methoxy (donor) or trifluoromethyl (acceptor) monosubstituted derivatives readily form recombination exciplexes with N,N-dimethylaniline and other tertiary amines that produce emission with maxima ranging from 385 to 435 nm. The position of emission band maximum linearly correlates with readily calculated gas-phase electron affinity of the corresponding diphenylacetylene, which can be used for fast computational prescreening of the candidate molecules, and various substituted diphenylacetylenes can be synthesized via relatively simple and universal cross-coupling reactions of Sonogashira and Castro. Together, the simple solution-based experiment, computationally cheap prescreening method, and universal synthetic strategy may open a very broad and chemically convenient class of compounds to obtain OLEDs and OLED-based multifunctional devices with tunable emission spectrum and high conversion efficiency that has yet not been seriously considered for these purposes.
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Affiliation(s)
- Anatoly R Melnikov
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation.,Novosibirsk State University , 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
| | - Maria P Davydova
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Peter S Sherin
- Novosibirsk State University , 2, Pirogova Str., 630090 Novosibirsk, Russian Federation.,International Tomography Center , 3a, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Valeri V Korolev
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Alexander A Stepanov
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Evgeny V Kalneus
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Enrico Benassi
- School of Science and Technology, Nazarbayev University , 53, Qabanbay Batyr Ave., 010000 Astana, Kazakhstan.,University of Oklahoma , 660 Parrington Oval, Norman, Oklahoma 73019, United States
| | - Sergei F Vasilevsky
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Dmitri V Stass
- Institute of Chemical Kinetics and Combustion SB RAS , 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation.,Novosibirsk State University , 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
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20
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Ten YA, Salnikov OG, Amitina SA, Stass DV, Rybalova TV, Kazantsev MS, Bogomyakov AS, Mostovich EA, Mazhukin DG. The Suzuki–Miyaura reaction as a tool for modification of phenoxyl-nitroxyl radicals of the 4H-imidazole N-oxide series. RSC Adv 2018; 8:26099-26107. [PMID: 35541934 PMCID: PMC9082764 DOI: 10.1039/c8ra05103h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 07/13/2018] [Indexed: 11/30/2022] Open
Abstract
2-(3,5-Di-tert-butyl-4-hydroxyphenyl)-5-(4-iodophenyl)-4,4-dimethyl-4H-imidazole 3-oxide reacts with phenylboronic acid and its substituted derivatives in a cross-coupling reaction of the Suzuki–Miyaura type to form 5-biphenyl derivatives of 4H-imidazole-N-oxide. Interaction of the same compound with B2(pin)2 in the presence of PdCl2(PPh3)2 proceeds through the formation of intermediate 1,3,2-dioxoborolane and leads to the product of homocoupling: biphenyl-bis(imidazole). Oxidation of the resultant imidazoles with lead dioxide quantitatively yields stable conjugated phenoxyl-nitroxyl mono- and diradicals, which are of interest as electroactive paramagnetic materials. The crystal structure of the monoradical, 2,6-di-tert-butyl-4-[1-oxido-4-(biphenyl-4-yl)-5,5-dimethyl-1H-imidazole-2(5H)-ylidene]cyclohex-2,5-dienone, its magnetic susceptibility, EPR spectra of the obtained hybrid radicals in solution, and cyclic voltammetry characteristics of 4H-imidazoles were studied. Pd-catalyzed cross-coupling reaction as a tool for modification of hybrid phenoxyl-nitroxides.![]()
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Affiliation(s)
- Yury A. Ten
- NN Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
- Russia,
| | | | - Svetlana A. Amitina
- NN Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
- Russia,
| | - Dmitri V. Stass
- Novosibirsk State University
- Novosibirsk
- Russia
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS
- Novosibirsk
| | - Tatyana V. Rybalova
- NN Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
- Russia,
- Novosibirsk State University
- Novosibirsk
| | - Maxim S. Kazantsev
- NN Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
- Russia,
- Novosibirsk State University
- Novosibirsk
| | | | - Evgeny A. Mostovich
- NN Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
- Russia,
- Novosibirsk State University
- Novosibirsk
| | - Dmitrii G. Mazhukin
- NN Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
- Russia,
- Novosibirsk State University
- Novosibirsk
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21
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Tretyakov EV, Fedyushin PA, Panteleeva EV, Stass DV, Bagryanskaya IY, Beregovaya IV, Bogomyakov AS. Substitution of a Fluorine Atom in Perfluorobenzonitrile by a Lithiated Nitronyl Nitroxide. J Org Chem 2017; 82:4179-4185. [PMID: 28358985 DOI: 10.1021/acs.joc.7b00144] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (1) lithium derivative was found to react with perfluorobenzonitrile (2) substituting its para-fluorine atom to form 2-(4-cyanotetrafluorophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-3-oxide-1-oxyl (3), a new nitronyl nitroxide containing a multifunctional framework of strong electron-withdrawing nature. This result shows the possibility of obtaining multifunctional nitronyl nitroxides via the interaction of paramagnetic lithium derivatives as C-nucleophiles with polyfluoroarenes activated for nucleophilic substitution. The reaction regioselectivity is supported by the data of quantum-chemical calculations, which also show that the reaction follows a concerted pathway without formation of an intermediate. Reduction of nitronyl nitroxide 3 in system NaNO2-AcOH yielded corresponding iminonitroxide 4. Characterization of persistent radicals 3 and 4 obtained by the SNF synthetic strategy includes X-ray crystal structures, electron spin resonance data, and static magnetic-susceptibility measurements. X-ray diffraction analysis of both nitronyl nitroxide and iminonitroxide revealed a complete match of the parameters of their crystal lattices.
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Affiliation(s)
- Evgeny V Tretyakov
- N. N. Vorozhtsov Institute of Organic Chemistry , 9 Ac. Lavrentiev Avenue, Novosibirsk 630090, Russia.,Novosibirsk State University , 2 Pirogova Str., Novosibirsk 630090, Russia
| | - Pavel A Fedyushin
- N. N. Vorozhtsov Institute of Organic Chemistry , 9 Ac. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Elena V Panteleeva
- N. N. Vorozhtsov Institute of Organic Chemistry , 9 Ac. Lavrentiev Avenue, Novosibirsk 630090, Russia.,Novosibirsk State University , 2 Pirogova Str., Novosibirsk 630090, Russia
| | - Dmitri V Stass
- Novosibirsk State University , 2 Pirogova Str., Novosibirsk 630090, Russia.,Institute of Chemical Kinetics and Combustion , 3 Institutskaya Str., Novosibirsk 630090, Russia
| | - Irina Yu Bagryanskaya
- N. N. Vorozhtsov Institute of Organic Chemistry , 9 Ac. Lavrentiev Avenue, Novosibirsk 630090, Russia.,Novosibirsk State University , 2 Pirogova Str., Novosibirsk 630090, Russia
| | - Irina V Beregovaya
- N. N. Vorozhtsov Institute of Organic Chemistry , 9 Ac. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Artem S Bogomyakov
- International Tomography Center , 3a Institutskaya Str., Novosibirsk 630090, Russia
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22
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Evtushok DV, Melnikov AR, Vorotnikova NA, Vorotnikov YA, Ryadun AA, Kuratieva NV, Kozyr KV, Obedinskaya NR, Kretov EI, Novozhilov IN, Mironov YV, Stass DV, Efremova OA, Shestopalov MA. A comparative study of optical properties and X-ray induced luminescence of octahedral molybdenum and tungsten cluster complexes. Dalton Trans 2017; 46:11738-11747. [DOI: 10.1039/c7dt01919j] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Octahedral W cluster complexes have more intensive X-ray excited optical luminescence than Mo ones.
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23
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Melnikov AR, Verkhovlyuk VN, Kalneus EV, Korolev VV, Borovkov VI, Sherin PS, Davydova MP, Vasilevsky SF, Stass DV. Estimation of the Fraction of Spin-Correlated Radical Ion Pairs in Irradiated Alkanes using Magnetosensitive Recombination Luminescence from Exciplexes Generated upon Recombination of a Probe Pair. ACTA ACUST UNITED AC 2016. [DOI: 10.1515/zpch-2016-0819] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
We suggest a convenient probe exciplex system for studies in radiation spin chemistry based on a novel acceptor-substituted diphenylacetylene, 1-(phenylethynyl)-4-(trifluoromethyl)benzene that has a very short fluorescence lifetime (<200 ps) and low quantum yield (0.01) of intrinsic emission, provides efficient electron capture in alkanes and efficient exciplex formation upon recombination in pair with DMA radical cation, while exhibiting a shifted to red exciplex emission band as compared to the parent system DMA – diphenylacetylene. After chemical, luminescent, radiation and spin-chemical characterization of the new system we used the magnitude of magnetic field effect in its exciplex emission band for experimental estimation of the fraction of spin-correlated radical ion pairs under X-irradiation with upper energy cutoff 40 keV in a set of 11 alkanes. For linear and branched alkanes magnetic field effects and the corresponding fractions are approximately 19–20% and 0.28, while for cyclic alkanes they are lower at 16–17% and 0.22, respectively.
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Affiliation(s)
- Anatoly R. Melnikov
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
- Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
| | - Vladimir N. Verkhovlyuk
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Evgeny V. Kalneus
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Valeri V. Korolev
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Vsevolod I. Borovkov
- Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090, Russian Federation
| | - Peter S. Sherin
- Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
- International Tomography Center SB RAS, 3a, Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Maria P. Davydova
- Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090, Russian Federation
| | - Sergei F. Vasilevsky
- Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090, Russian Federation
| | - Dmitri V. Stass
- Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090, Russian Federation
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24
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Melnikov AR, Kalneus EV, Korolev VV, Sherin PS, Borovkov VI, Stass DV. Estimation of the fluorescence lifetime for optically inaccessible exciplexes in nonpolar solutions under ionizing irradiation. Photochem Photobiol Sci 2016; 15:767-78. [PMID: 27142284 DOI: 10.1039/c6pp00033a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
X-irradiation of nonpolar solutions likely provides a possibility to create exciplexes for any donor-acceptor pair that would energetically and sterically allow this. Thorough study and characterization of X-radiation generated exciplexes usually cannot be carried out with conventional methods because of the complex and non-exponential formation and decay dynamics of these species. In this paper, we present a simple and universal experimental approach for the estimation of fluorescence lifetimes (τF) of X-radiation generated exciplexes. The suggested procedure is based on the comparison of quenching of the exciplex emission band and the emission band from a standard luminophore with a known excited state lifetime by dissolved oxygen. Using this approach we report the τF values for two systems with optically inaccessible exciplexes, diphenylacetylene-N,N-dimethylaniline (DMA) and p-terphenyl-DMA, and for two typical exciplex forming systems, naphthalene-DMA and anthracene-DMA. All the found τF values for the X-radiation generated exciplexes lie in the range of 50-70 ns. The accuracy of this approach was checked by time-resolved measurements under X- or near-UV irradiation for those pairs, whose properties make this feasible. The proposed method gives a possibility to avoid a complex numerical evaluation of the non-exponential kinetics of recombination luminescence, and can be used to estimate the characteristic τF values for luminophores and excited complexes formed under X-radiation.
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Affiliation(s)
- Anatoly R Melnikov
- Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., 630090 Novosibirsk, Russian Federation.
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25
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Bondar VS, Puzyr AP, Burov AE, Medvedeva SE, Rodicheva EK, Kobzeva TV, Melnikov AR, Karogodina TY, Zikirin SB, Stass DV, Molin YN, Gitelson JI. Effect of ionizing radiation on the luminescence of mycelium of luminous fungus Neonothopanus nambi. DOKL BIOCHEM BIOPHYS 2015; 460:30-3. [PMID: 25772986 DOI: 10.1134/s1607672915010093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Indexed: 11/23/2022]
Affiliation(s)
- V S Bondar
- Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia,
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26
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Kobzeva TV, Melnikov AR, Karogodina TY, Zikirin SB, Stass DV, Molin YN, Rodicheva EK, Medvedeva SE, Puzyr AP, Burov AA, Bondar VS, Gitelson JI. Stimulation of luminescence of mycelium of luminous fungus Neonothopanus nambi
by ionizing radiation. LUMINESCENCE 2014. [DOI: 10.1002/bio.2749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Kobzeva TV, Melnikov AR, Karogodina TY, Zikirin SB, Stass DV, Molin YN, Rodicheva EK, Medvedeva SE, Puzyr AP, Burov AA, Bondar VS, Gitelson JI. Stimulation of luminescence of mycelium of luminous fungusNeonothopanus nambiby ionizing radiation. LUMINESCENCE 2014; 29:703-10. [DOI: 10.1002/bio.2656] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/28/2014] [Accepted: 02/02/2014] [Indexed: 01/26/2023]
Affiliation(s)
- Tatiana V. Kobzeva
- Institute of Chemical Kinetics and Combustion SB RAS; 630090 Novosibirsk Russia
| | - Anatoly R. Melnikov
- Institute of Chemical Kinetics and Combustion SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; 630090 Novosibirsk Russia
| | | | - Samat B. Zikirin
- Institute of Chemical Kinetics and Combustion SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; 630090 Novosibirsk Russia
| | - Dmitri V. Stass
- Institute of Chemical Kinetics and Combustion SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; 630090 Novosibirsk Russia
| | - Yuri N. Molin
- Institute of Chemical Kinetics and Combustion SB RAS; 630090 Novosibirsk Russia
| | - Emma K. Rodicheva
- Institute of Biophysics SB RAS; 660036 Krasnoyarsk Russia
- Siberian Federal University; 660041 Krasnoyarsk Russia
| | - Svetlana E. Medvedeva
- Institute of Biophysics SB RAS; 660036 Krasnoyarsk Russia
- Siberian Federal University; 660041 Krasnoyarsk Russia
| | - Alexey P. Puzyr
- Institute of Biophysics SB RAS; 660036 Krasnoyarsk Russia
- Siberian Federal University; 660041 Krasnoyarsk Russia
| | - Andrey A. Burov
- Siberian Federal University; 660041 Krasnoyarsk Russia
- Special Design-Technology Bureau “Nauka” SB RAS; 660049 Krasnoyarsk Russia
| | - Vladimir S. Bondar
- Institute of Biophysics SB RAS; 660036 Krasnoyarsk Russia
- Siberian Federal University; 660041 Krasnoyarsk Russia
| | - Joseph I. Gitelson
- Institute of Biophysics SB RAS; 660036 Krasnoyarsk Russia
- Siberian Federal University; 660041 Krasnoyarsk Russia
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28
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Melnikov AR, Kalneus EV, Korolev VV, Dranov IG, Kruppa AI, Stass DV. Highly efficient exciplex formation via radical ion pair recombination in X-irradiated alkane solutions for luminophores with short fluorescence lifetimes. Photochem Photobiol Sci 2014; 13:1169-79. [DOI: 10.1039/c3pp50432h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-irradiation of an alkane solution of N,N-dimethylaniline and diphenylacetylene (τf = 8 ps) produces an exciplex and yields a magnetic field effect of 20% in the exciplex emission band.
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Affiliation(s)
- Anatoly R. Melnikov
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk, Russian Federation
- Novosibirsk State University
- 630090 Novosibirsk, Russian Federation
| | - Evgeny V. Kalneus
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk, Russian Federation
| | - Valeri V. Korolev
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk, Russian Federation
| | - Igor G. Dranov
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk, Russian Federation
| | - Alexander I. Kruppa
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk, Russian Federation
| | - Dmitri V. Stass
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk, Russian Federation
- Novosibirsk State University
- 630090 Novosibirsk, Russian Federation
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Karogodina TY, Sergeeva SV, Stass DV. Stability And Reactivity Of Free Radicals: APhysicochemical Perspective With Biological Implications. Hemoglobin 2011; 35:262-75. [DOI: 10.3109/03630269.2011.570187] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Karogodina TY, Sergeeva SV, Stass DV. Small but Statistically Reliable Magnetic Field Effect Observed in the Recombination of a Non-Correlated Pair of Biologically Relevant Radicals Nitric Oxide and Superoxide Anion. Biophys J 2009. [DOI: 10.1016/j.bpj.2008.12.1185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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31
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Vasilevsky SF, Klyatskaya SV, Korovnikova OL, Amitina SA, Stass DV, Grigor'ev IA, Elguero J. Stable nitroxyl radicals with triple bonds: 4-acetylenyl-3-imidazoline-3-oxide-1-oxyls. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.02.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Sviridenko FB, Stass DV, Kobzeva TV, Tretyakov EV, Klyatskaya SV, Mshvidobadze EV, Vasilevsky SF, Molin YN. Optically Detected ESR and Low Magnetic Field Signals from Spin Triads: 2-Imidazoline-1-Oxyl Derivatives in X-irradiated Alkane Liquids as a Method to Study Three-Spin Systems. J Am Chem Soc 2004; 126:2807-19. [PMID: 14995198 DOI: 10.1021/ja037157m] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This contribution reports the design and synthesis of a series of spin-labeled charge acceptors to produce three-spin systems of "radical ion/biradical ion" type in X-irradiated alkane liquids. This opens the way to study spin triads in experimental conditions, in which short-lived radical ion pairs are conventionally studied, thus offering optically detected techniques such as magneto-resonance OD ESR and level-crossing MARY spectroscopy. The structure of the synthesized 2-imidazoline-1-oxyl derivatives is A-Sp-R, where A is a positive or negative charge acceptor, R is a stable radical, and Sp is a hydrocarbon bridge. The set of 20+ compounds represent a convenient tool to construct experimental three-spin systems with various properties, e.g. with the "third" spin introduced into one or the other partner of the radical ion pair. The degree of exchange coupling between the two paramagnetic fragments in the biradical ion has been demonstrated to strongly depend on the type of the radical fragment R and the structure of the bridge Sp. As a result, a series of acceptors with systematically reduced exchange interaction has been synthesized, and optimal systems for the observation of low magnetic field effect have been found. In the most favorable case, an OD ESR signal from a spin triad living as short as ca. 100 ns has been registered as a single unresolved line. The exchange integral for this biradical anion (9) was estimated from OD ESR and ESR experiments to be ca. 10(3) G by the order of magnitude, which is much greater than the hyperfine couplings in the biradical ion but much smaller than the thermal energy kT.
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Affiliation(s)
- Fyodor B Sviridenko
- Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3, Novosibirsk 630090, Russia.
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