Browsing by Author "Zissimou, Georgia A."
Now showing items 1-20 of 27
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Article
4H-1,2,6-Thiadiazin-4-one-containing small molecule donors and additive effects on their performance in solution-processed organic solar cells
Hermerschmidt, F.; Kalogirou, Andreas S.; Min, J.; Zissimou, Georgia A.; Tuladhar, S. M.; Ameri, T.; Faber, H.; Itskos, Grigorios; Choulis, Stelios A.; Anthopoulos, T. D.; Bradley, D. D. C.; Nelson, J.; Brabec, C. J.; Koutentis, Panayiotis Andreas (2015)The optical, electrochemical, morphological and transport properties of a series of thiadiazinone (acceptor) and (thienyl)carbazoles (donor) containing π-extended donor-acceptor-donors (D-A-D) are presented. Systematic ...
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Article
4H-1,2,6-Thiadiazine-containing donor–acceptor conjugated polymers: synthesis, optoelectronic characterization and their use in organic solar cells
Chochos, Christos L.; Kalogirou, Andreas S.; Ye, Tengling; Tatsi, Elisavet; Katsouras, Athanasios; Zissimou, Georgia A.; Gregoriou, Vasilis G.; Avgeropoulos, Apostolos; Koutentis, Panayiotis A. (2018)π-Conjugated donor–acceptor (D–A) polymers containing electron withdrawing non-S-oxidized 4H-1,2,6-thiadiazines and electron donating (het)aryl-substituted indacenodithiophenes (IDTs) were prepared and used in organic solar ...
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Article
5,6,7,8-Tetrafluoro-1-(2-nitrophenyl)-3-phenyl-1H-benzo[e][1,3,4]oxadiazine
Zissimou, Georgia A.; Kourtellaris, Andreas; Koutentis, Panayiotis A. (2018)Treating 1-fluoro-2-nitrobenzene (6) with N′-pentafluorophenylbenzohydrazide (7) and K2CO3 (1.1 equiv) in EtOH at ca. 110 °C (sealed tube) for 24 h affords 5,6,7,8-tetrafluoro-1-(2-nitrophenyl)-3-phenyl-1H-benzo[e][1,3,4 ...
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Article
Anti-Cancer Activity of Phenyl and Pyrid-2-yl 1,3-Substituted Benzo[1,2,4]triazin-7-ones and Stable Free Radical Precursors
Keane, Lee-Ann J.; Mirallai, Styliana I.; Sweeney, Martin; Carty, Michael P.; Zissimou, Georgia A.; Berezin, Andrey A.; Koutentis, Panayiotis A.; Aldabbagh, Fawaz (2018)Cell viability studies for benzo[1,2,4]triazin-7-ones and 1,2,4-benzotriazinyl (Blatter-type) radical precursors are described with comparisons made with 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO). All of the stable free ...
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Article
ChemInform Abstract: Route to Benzo‐ and Pyrido‐Fused 1,2,4‐Triazinyl Radicals via N′‐(Het)aryl‐N′‐2‐nitro(het)aryl]hydrazides.
Berezin, Andrey A.; Zissimou, Georgia A.; Constantinides, Christos P.; Beldjoudi, Yassine; Rawson, Jeremy M.; Koutentis, Panayiotis Andreas (2014)
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Article
Coordination Complexes of a Neutral 1,2,4-Benzotriazinyl Radical Ligand: Synthesis, Molecular and Electronic Structures, and Magnetic Properties
Morgan, I. S.; Mansikkamäki, Akseli; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Rouzières, M.; Tuononen, H. M.; Clérac, R. (2015)A series of d-block metal complexes of the recently reported coordinating neutral radical ligand 1-phenyl-3-(pyrid-2-yl)-1,4-dihydro-1,2,4-benzotriazin-4-yl (1) was synthesized. The investigated systems contain the ...
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Article
Coordination Complexes of a Neutral 1,2,4‐Benzotriazinyl Radical Ligand: Synthesis, Molecular and Electronic Structures, and Magnetic Properties
Morgan, Ian S.; Mansikkamäki, Akseli; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Rouzières, Mathieu; Clérac, Rodolphe; Tuononen, Heikki M. (2015)
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Article
Discovery of anti-cancer activity for benzo1,2,4]triazin-7-ones: Very strong correlation to pleurotin and thioredoxin reductase inhibition
Sweeney, Martin; Coyle, Robert; Kavanagh, Paul; Berezin, Andrey A.; Lo Re, Daniele; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Carty, Michael P.; Aldabbagh, Fawaz (2016)
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Article
Discovery of anti-cancer activity for benzo[1,2,4]triazin-7-ones: Very strong correlation to pleurotin and thioredoxin reductase inhibition
Sweeney, M.; Coyle, R.; Kavanagh, P.; Berezin, Andrey A.; Lo Re, D.; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Carty, Michael P.; Aldabbagh, Fawaz (2016)The thioredoxin (Trx)–thioredoxin reductase (TrxR) system plays a key role in maintaining the cellular redox balance with Trx being over-expressed in a number of cancers. Inhibition of TrxR is an important strategy for ...
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Article
Emission from the stable Blatter radical
Karecla, G.; Papagiorgis, Panagiotis; Panagi, N.; Zissimou, Georgia A.; Constantinides, Christos P.; Koutentis, Panayiotis Andreas; Itskos, Grigorios; Hayes, Sophia C. (2017)1,3-Diaryl-1,4-dihydro-1,2,4-benzotriazin-4-yls are air stable organic radicals which have been exploited for their interesting magnetic properties. Herein, we present the optical properties of the "parent" radical namely ...
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Article
Emission from the stable Blatter radicalAAA
Karecla, G.; Papagiorgis, Panagiotis; Panagi, N.; Zissimou, Georgia A.; Constantinides, Christos P.; Koutentis, Panayiotis Andreas; Itskos, Grigorios; Hayes, Sophia C. (2017)1,3-Diaryl-1,4-dihydro-1,2,4-benzotriazin-4-yls are air stable organic radicals which have been exploited for their interesting magnetic properties. Herein, we present the optical properties of the "parent" radical namely ...
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Article
Erratum: Route to Benzo- and Pyrido-Fused 1,2,4-Triazinyl Radicals via N′-(Het)aryl-N′-[2-nitro(het)aryl]hydrazides (J. Org. Chem. (2014) 79:1 (314-327) DOI: 10.1021/jo402481t)
Berezin, Andrey A.; Zissimou, Georgia A.; Constantinides, Christos P.; Beldjoudi, Yassine; Rawson, J. M.; Koutentis, Panayiotis Andreas (2015)
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Article
Erratum: Tetraphenylhexaazaanthracenes: 16π Weakly Antiaromatic Species with Singlet Ground States (Org. Lett. (2015) 17 (4026-4029) DOI: 10.1021/acs.orglett.5b01923)
Constantinides, Christos P.; Zissimou, Georgia A.; Berezin, Andrey A.; Ioannou, Theodosia A.; Manoli, Maria; Tsokkou, Demetra; Theodorou, E.; Hayes, Sophia C.; Koutentis, Panayiotis Andreas (2016)
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Article
A magnetostructural investigation of an abrupt spin transition for 1-phenyl-3-trifluoromethyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl
Constantinides, Christos P.; Berezin, Andrey A.; Zissimou, Georgia A.; Manoli, Maria; Leitus, G. M.; Bendikov, M.; Probert, M. R.; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)1-Phenyl-3-trifluoromethyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl is the first example of a hydrazyl radical that shows a reversible sharp spin transition fully completed within 5(1) K. The nominally first-order transition ...
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Doctoral Thesis Open Access
New chemistry of azaacenes
Zissimou, Georgia A. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2019-05)Η παρούσα Διδακτορική Διατριβή αρχίζει με μια σύντομη εισαγωγή (Κεφάλαιο 1) στην ετεροκυκλική χημεία και εμβαθύνει στη σύνθεση, τις ιδιότητες και την οξειδωτική σταθερότητα των ακενίων και των αζακενίων. Στο Κεφάλαιο 2 ...
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Article
Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications
Economopoulos, Solon P.; Chochos, Christos L.; Ioannidou, Heraklidia A.; Neophytou, Marios; Charilaou, C.; Zissimou, Georgia A.; Frost, J. M.; Sachetan, T.; Shahid, M.; Nelson, J.; Heeney, M.; Bradley, D. D. C.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (2013)Five new polymers based on the 4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility ...
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Article
Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications
Economopoulos, Solon P.; Chochos, Christos L.; Ioannidou, Heraklidia A.; Neophytou, Marios; Charilaou, C.; Zissimou, Georgia A.; Frost, J. M.; Sachetan, T.; Shahid, M.; Nelson, J.; Heeney, M.; Bradley, D. D. C.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (2013)Five new polymers based on the 4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility ...
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Article
Oxidation of Isodiphenylfluorindine: Routes to 13-Oxoisodiphenylfluorindinium Perchlorate and Fluorindine Cruciform Dimers
Zissimou, Georgia A.; Kourtellaris, Andreas; Koutentis, Panayiotis A. (2018)Isodiphenylfluorindine (5) reacts with K2Cr2O7/H+ to give 13-oxoisodiphenylfluorindinium perchlorate (7) (75%), but with phenyliodine bis(trifluoroacetate) (PIFA) or MnO2 it gives the zwitterionic and quinoidal cruciform ...
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Article
Oxidation of Tetraphenylhexaazaanthracene: Accessing a Scissor Dimer of a 16π Biscyanine
Zissimou, Georgia A.; Constantinides, Christos P.; Manoli, Maria; Pieridou, Galatia K.; Hayes, Sophia C.; Koutentis, Panayiotis Andreas (2016)Tetraphenylhexaazaanthracene (TPHA), a fluorescent zwitterionic biscyanine with a closed-shell singlet ground state, on treatment with manganese dioxide or phenyliodine bis(trifluoroacetate) (PIFA), undergoes oxidative ...
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Article
Preparation of Blatter Radicals via Aza-Wittig Chemistry: The Reaction of N-Aryliminophosphoranes with 1-(Het)aroyl-2-aryldiazenes
Savva, Anastasia C.; Mirallai, Styliana I.; Zissimou, Georgia A.; Berezin, Andrey A.; Demetriades, Marina; Kourtellaris, Andreas; Constantinides, Christos P.; Nicolaides, C.; Trypiniotis, Theodossis; Koutentis, Panayiotis Andreas (2017)Reacting N-aryliminophosphoranes with 1-(het)aroyl-2-aryldiazenes in preheated diphenyl ether at ca. 150-250 °C for 5-25 min affords in most cases the 1,3-diaryl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls (aka Blatter radicals) ...