1
|
Varga V, Pokorná K, Lamač M, Horáček M, Pinkas J. Preparation of silyl-terminated branched polyethylenes catalyzed by Brookhart's nickel diimine complex activated with hydrosilane/B(C 6F 5) 3. Dalton Trans 2024; 53:5249-5257. [PMID: 38406967 DOI: 10.1039/d3dt04200f] [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: 02/27/2024]
Abstract
Brookhart's nickel α-diimine complex [(κ2-N,N-BIAN)NiCl2] (1) (where BIAN = {Ar-NAceN-Ar}, Ace = acenaphthen-1,2-diyl, and Ar = 2,6-(iPr)2-C6H3) activated with a hydrosilane/B(C6F5)3 (SiHB) adduct forms a highly active catalytic system for ethylene polymerization. Under optimal conditions, the activity of the system depends on the nature of hydrosilane and decreases in the order R3SiH > Ph2SiH2 > PhSiH3. The decrease in system activity within the hydrosilane series is correlated with increasing formation of Ni(I) species. In addition to their activation effect, hydrosilanes act as efficient chain termination/chain transfer agents, with the Si/Ni ratio controlling the molecular weight of the resulting polyethylene (PE). The use of Et3SiH generated elastomeric, highly branched polymers with a saturated chain-end, while systems using Ph2SiH2 and PhSiH3 led to branched end-functionalized PEs terminated with the hydrosilyl functionality (i.e. br-PE-SiPh2H or br-PE-SiPhH2).
Collapse
Affiliation(s)
- Vojtech Varga
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Kristýna Pokorná
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| |
Collapse
|
2
|
Pinkas J, Gyepes R, Polášek M, Mach K, Horáček M. Reactions of permethyltitanocene tucked-in derivatives with carbon dioxide. Dalton Trans 2022; 51:10198-10215. [PMID: 35748224 DOI: 10.1039/d2dt01344d] [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
Both single tucked-in permethyltitanocene 1 and double tucked-in permethyltitanocene 2 react with excess CO2 by insertion into their Ti-CH2 bonds. The former one precipitates instantly a yellow carboxylate-tethered oligomer [3]n which is insoluble in aprotic solvents and in a vacuum it sublimes as a monomer without decomposition. Computations for n ≤ 4 optimised the structure of the monomer [3] and showed that open chain oligomers bound by dative O → Ti bonds were not sterically hindered. The latter bond dissociates when [3]n is oxidized by chlorination with CDCl3 or CD2Cl2 to give Ti(IV) chloride 4 or upon metathesis of [3]n with Me3SiCl yielding Ti(III) chloride 5. Oxidative addition of MeCN affords a C-C coupled dinuclear titanocene diimine 6. Compound [3]n also reacts with 1 to give the tethered carbodiolate 8 or with [Cp*2TiH] (where Cp* = η5-C5Me5) to give the half-tethered carbodiolate 10. The non-tethered carbodiolate 12 was obtained from [Cp*2TiH] and CO2 yielding titanocene formate by reaction of the latter with another equivalent of [Cp*2TiH]. All these carbodiolates contain Ti(III) metal atoms forming electronic triplet states of axial or orthorhombic symmetry. In contrast to the rapidly reacting 1 compound 2 reacts with excess CO2 slowly in m-xylene at 100 °C using only one of its two Ti-CH2 moieties. The structure of the obtained carbodiolate 13 indicates that the primary product analogous to 3 reacts with 2 more rapidly than with CO2.
Collapse
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic. .,Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic.
| | - Miroslav Polášek
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| |
Collapse
|
3
|
Jankowski P, Topor-Madry R, Pinkas J, Gasior M. Comparison of inpatient and outpatient cardiac rehabilitation following myocardial infarction. Eur J Prev Cardiol 2022. [DOI: 10.1093/eurjpc/zwac056.213] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Cardiac rehabilitation (CR) following myocardial infarction (MI) improves prognosis. Models of second phase CR differ across countries. The aim of the study was to compare outcomes in MI survivors participating in outpatient and inpatient CR programmes.
Methods
We included all patients hospitalized due to acute MI in Poland between October 2017 and December 2018 (n=96634). Among them 4411 patients were referred to and commenced outpatient CR, whereas 11626 patients started inpatient CR within 30 days following discharge. All the patients were the subject of prospective follow-up. The primary endpoint was defined as death from any cause.
Results
The mean follow-up was 332.8±128.1 days. Younger age, male sex, and a cancer in the history were related to higher probability, whereas diabetes, heart failure, chronic kidney disease, chronic obstructive pulmonary disease, ST-elevation myocardial infarction, and myocardial revascularization were related to lower probability of participation in the outpatient CR. Participation in outpatient CR was related to the risk of all-cause mortality both in univariable (hazard ratio [95% confidence intervals] 0.37 [0.26-0.51]) and multivariable analysis (0.53 [0.38-0.74]). Participation in the outpatient CR was also related to the lower risk of death or MI or stroke (0.57 [0.48-0.67] and 0.72 [0.61-0.84]) and a lower risk of death or hospitalization due to cardiovascular reasons: 0.78 (0.73-0.84) and 0.85 (0.80-0.91) for the univariable and multivariable analyses respectively. The analysis of propensity score matched groups confirmed the results.
Conclusion
Outpatient CR following MI may be related to improved prognosis compared to the inpatient programme.
Collapse
Affiliation(s)
- P Jankowski
- The Medical Centre of Postgraduate Education, Warsaw, Poland
| | - R Topor-Madry
- The Agency for Health Technology Assessment and Tariff System, Warsaw, Poland
| | - J Pinkas
- The Medical Centre of Postgraduate Education, Warsaw, Poland
| | - M Gasior
- The Medical University of Silesia, Zabrze, Poland
| |
Collapse
|
4
|
Dunlop D, Večeřa M, Gyepes R, Kubát P, Lang K, Horáček M, Pinkas J, Šimková L, Liška A, Lamač M. Luminescent Cationic Group 4 Metallocene Complexes Stabilized by Pendant N-Donor Groups. Inorg Chem 2021; 60:7315-7328. [PMID: 33945274 DOI: 10.1021/acs.inorgchem.1c00461] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cationic group 4 metallocene complexes with pendant imine and pyridine donor groups were prepared as stable crystalline [B(C6F5)4]- salts either by protonation of the intramolecularly bound ketimide moiety in neutral complexes [(η5-C5Me5){η5-C5H4CMe2CMe2C(R)═N-κN}MCl] (M = Ti, Zr, Hf; R = t-Bu, Ph) by PhNMe2H+[B(C6F5)4]- to give [(η5-C5Me5){η5-C5H4CMe2CMe2C(R)═NH-κN}MCl]+[B(C6F5)4]- or by chloride ligand abstraction from the complexes [(η5-C5Me5)(η5-C5H4CMe2CH2C5H4N)MCl2] (M = Ti, Zr) by Li[B(C6F5)4]·2.5Et2O to give [(η5-C5Me5)(η5-C5H4CMe2CH2C5H4N-κN)MCl]+[B(C6F5)4]-. Solid state structures of the new compounds were established by X-ray diffraction analysis, and their electrochemical behavior was studied by cyclic voltammetry. The cationic complexes of Zr and Hf, compared to the corresponding neutral species, exhibited significantly enhanced luminescence predominantly from triplet ligand-to-metal (3LMCT) excited states with lifetimes up to 62 μs and quantum yields up to 58% in the solid state. DFT calculations were performed to explain the structural features and optical and electrochemical properties of the complexes.
Collapse
Affiliation(s)
- David Dunlop
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic.,Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Praha 2, Czech Republic
| | - Miloš Večeřa
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic.,Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Praha 2, Czech Republic
| | - Pavel Kubát
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| | - Kamil Lang
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| | - Ludmila Šimková
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| | - Alan Liška
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
| |
Collapse
|
5
|
Gyepes R, Pinkas J, Kubišta J, Mach K, Horáček M. Sunlight-induced dehydrogenation rearrangement of the dititanium complex [Ti(η5-C5HMe4)(μ-η1: η5-C5Me4)]2. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
6
|
Sopoušek J, Pinkas J, Buršík J, Svoboda M, Krásenský P. Continuous Flow Synthesis of Iron Oxide Nanoparticles Using Water-in-Oil Microemulsion. Colloid J 2020. [DOI: 10.1134/s1061933x20060174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Jankowski P, Topor-Madry R, Gasior M, Ceglowska U, Eysymontt Z, Gierlotka M, Wita K, Legutko J, Dudek D, Sierpinski R, Pinkas J, Kazmierczak J, Niedzielski A, Witkowski A, Szmowski Ł. Managed care improves prognosis in acute myocardial infarction survivors. Data from the MAnaged Care for Acute Myocardial Infarction Survivors (MACAMIS) Programme. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1309] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Mortality following acute myocardial infarction (MI) remains high despite progress in pharmacotherapy and interventional treatment. In 2017 a nation-wide system of managed care for MI survivors comprising a continuum of acute treatment of MI, staged revascularization, cardiac rehabilitation, cardiac electrotherapy and cardiac ambulatory care within one year following MI was implemented in Poland. The managed care programme (MCP) includes also the quality of care assessment based on clinical measures (e.g. cardiovascular risk factors control) as well as on the rate of minor and major cardiovascular events. The goal of the analysis was to assess the overall mortality of MI survivors participating and not participating in the MCP.
Methods
The database of survivors of acute MI discharged from hospital from October 1, 2017 to December 31, 2018 was analyzed. Patients who died within 10 days after discharge were excluded from the analysis. The primary end-point was defined as death from any cause. Propensity-Score Matching (PSM) using nearest neighbor matching was used to form comparable groups of patients participating and not participating in the MCP. The Cox proportional hazard regression analysis was used to assess the relation between MCP and the overall mortality.
Results
MCP was implemented in the first stage in 48 hospitals spread around the country (about 34% of all hospitals treating acute MI patients in Poland). Out of 87739 analyzed patients (age: 68.1±11.9 years; 55581 men and 32158 women) 34064 were hospitalized in hospitals with MCP implemented. Altogether 10404 patients (11.9% of the whole cohort; 30.5% of those hospitalized in hospitals with MCP implemented) participated in MCP. They were matched with 10404 patients not participating in the MCP. During 324.8±140.5 days of follow-up 7413 patients died. One-year mortality was lower in patients participating in the MCP both when we analyzed the whole cohort (4.4% vs. 9.5%; p<0.001) as well as when we limited the analysis to the PSM groups (4.4% vs. 6.5%; p<0.001, figure 1). MCP was related to the overall mortality in univariate (HR 0.43 [0.39–0.48]) as well as in multivariate analysis (0.64 [0.57–0.71]) in the whole cohort as well as in the PSM cohort (HR 0.63 [0.56–0.72] and 0.64 [0.56–0.72] for the univariate and multivariate analysis respectively). When we limited the analysis to hospitals in which MCP was implemented one-year mortality was 4.3% vs. 6.3% (p<0.001) whereas univariate HR was 0.51 (0.44–0.60) and multivariate HR 0.52 (0.44–0.61).
Conclusion
The implemented in Poland nation-wide system of managed care for MI survivors is related to improved survival. Therefore, the Ministry of Health plans to implement the programme in all cardiac centers in Poland.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- P Jankowski
- Jagiellonian University Medical College, 1st Department of Cardiology and Hypertension, Krakow, Poland
| | - R Topor-Madry
- Agency for Health Technology Assessment and Tariff System, Warsaw, Poland
| | - M Gasior
- The Medical University of Silesia, Zabrze, Poland
| | - U Ceglowska
- Agency for Health Technology Assessment and Tariff System, Warsaw, Poland
| | - Z Eysymontt
- Silesian Rehabilitation Centre, Ustron, Poland
| | | | - K Wita
- Medical University of Silesia, I Department of Cardiology, Katowice, Poland
| | - J Legutko
- Jagiellonian University Medical College, Department of Interventional Cardiology, Krakόw, Poland
| | - D Dudek
- Jagiellonian University Medical College, Institute of Cardiology, Krakόw, Poland
| | | | - J Pinkas
- Chief Sanitary Inspectorate, Warsaw, Poland
| | - J Kazmierczak
- Pomeranian Medical University, Department of Cardiology, Szczecin, Poland
| | | | - A Witkowski
- National Institute of Cardiology, Department of Interventional Cardiology and Angiology, Warsaw, Poland
| | | |
Collapse
|
8
|
Pinkas J, Kubišta J, Mach K, Gyepes R, Horáček M. Sunlight photolysis of cyclopentadienyl–tethered titanium(iv) permethyltitanocene chlorides. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Pinkas J, Horáček M, Varga V, Mach K, Szarka K, Vargová A, Gyepes R. Synthesis, structure and ethylene polymerisation activity of {η5:η1(N)-1-[(tert-butylamido)diphenylsilyl)]-2,3,4,5-tetramethylcyclopentadienyl}dichlorotitanium(IV). Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
10
|
Hamala V, Martišová A, Červenková Šťastná L, Karban J, Dančo A, Šimarek A, Lamač M, Horáček M, Kolářová T, Hrstka R, Gyepes R, Pinkas J. Ruthenium tetrazene complexes bearing glucose moieties on their periphery: Synthesis, characterization, and
in vitro
cytotoxicity. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Vojtěch Hamala
- Academy of Sciences of the Czech Republic Institute of Chemical Process Fundamentals v.v.i., Rozvojová 135 Prague 6 165 02 Czech Republic
- Faculty of Chemical Technology University of Chemistry and Technology Prague Technická 5 Prague 6 166 28 Czech Republic
| | - Andrea Martišová
- Regional Centre for Applied and Molecular Oncology Masaryk Memorial Cancer Institute Žlutý kopec 7 Brno 65653 Czech Republic
| | - Lucie Červenková Šťastná
- Academy of Sciences of the Czech Republic Institute of Chemical Process Fundamentals v.v.i., Rozvojová 135 Prague 6 165 02 Czech Republic
| | - Jindřich Karban
- Academy of Sciences of the Czech Republic Institute of Chemical Process Fundamentals v.v.i., Rozvojová 135 Prague 6 165 02 Czech Republic
| | - Andrej Dančo
- Academy of Sciences of the Czech Republic J. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3 Prague 8 182 23 Czech Republic
| | - Adam Šimarek
- Academy of Sciences of the Czech Republic J. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3 Prague 8 182 23 Czech Republic
| | - Martin Lamač
- Academy of Sciences of the Czech Republic J. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3 Prague 8 182 23 Czech Republic
| | - Michal Horáček
- Academy of Sciences of the Czech Republic J. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3 Prague 8 182 23 Czech Republic
| | - Tamara Kolářová
- Regional Centre for Applied and Molecular Oncology Masaryk Memorial Cancer Institute Žlutý kopec 7 Brno 65653 Czech Republic
| | - Roman Hrstka
- Regional Centre for Applied and Molecular Oncology Masaryk Memorial Cancer Institute Žlutý kopec 7 Brno 65653 Czech Republic
| | - Róbert Gyepes
- Academy of Sciences of the Czech Republic J. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3 Prague 8 182 23 Czech Republic
- Department of Inorganic Chemistry Charles University Hlavova 2030 Prague 2 128 43 Czech Republic
| | - Jiří Pinkas
- Academy of Sciences of the Czech Republic J. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3 Prague 8 182 23 Czech Republic
| |
Collapse
|
11
|
Gelle D, Lamač M, Mach K, Šimková L, Gyepes R, Sommerová L, Martišová A, Bartošík M, Vaculovič T, Kanický V, Hrstka R, Pinkas J. Enhanced Intracellular Accumulation and Cytotoxicity of Ferrocene‐Ruthenium Arene Conjugates. Chempluschem 2020. [DOI: 10.1002/cplu.202000022] [Citation(s) in RCA: 1] [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] [Indexed: 12/24/2022]
Affiliation(s)
- Donát Gelle
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
- Department of ChemistryFaculty of EducationJ. Selye University Bratislavská cesta 3322 945 01 Komárno Slovak Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Ludmila Šimková
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
- Department of ChemistryFaculty of EducationJ. Selye University Bratislavská cesta 3322 945 01 Komárno Slovak Republic
| | - Lucia Sommerová
- Regional Centre for Applied Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - Andrea Martišová
- Regional Centre for Applied Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - Martin Bartošík
- Regional Centre for Applied Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - Tomáš Vaculovič
- Department of ChemistryFaculty of ScienceMasaryk University Kamenice 753/5 62500 Brno Czech Republic
| | - Viktor Kanický
- Department of ChemistryFaculty of ScienceMasaryk University Kamenice 753/5 62500 Brno Czech Republic
| | - Roman Hrstka
- Regional Centre for Applied Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| |
Collapse
|
12
|
Dunlop D, Pinkas J, Horáček M, Žilková N, Lamač M. Hydrodehalogenation of organohalides by Et3SiH catalysed by group 4 metal complexes and B(C6F5)3. Dalton Trans 2020; 49:2771-2775. [DOI: 10.1039/d0dt00360c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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 use of the Et3SiH/B(C6F5)3 system for the activation of group 4 metal catalysts allows the efficient and selective catalytic hydrodefluorination of trifluorotoluenes.
Collapse
Affiliation(s)
- David Dunlop
- J. Heyrovský Institute of Physical Chemistry
- The Czech Academy of Sciences
- 18223 Prague 8
- Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry
- The Czech Academy of Sciences
- 18223 Prague 8
- Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry
- The Czech Academy of Sciences
- 18223 Prague 8
- Czech Republic
| | - Naděžda Žilková
- J. Heyrovský Institute of Physical Chemistry
- The Czech Academy of Sciences
- 18223 Prague 8
- Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry
- The Czech Academy of Sciences
- 18223 Prague 8
- Czech Republic
| |
Collapse
|
13
|
Pinkas J, Kubišta J, Gyepes R, Mach K, Horáček M. Molecular Hydrogen‐Induced Carbon Chain Rearrangement in Cyclopentadienyl‐Tethered Titanium(III) Permethyltitanocene Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901148] [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: 11/11/2022]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
- Department of Inorganic Chemistry Charles University Hlavova 2030 128 40 Prague 2 Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| |
Collapse
|
14
|
Lamač M, Horáček M, Červenková Šťastná L, Karban J, Sommerová L, Skoupilová H, Hrstka R, Pinkas J. Harmless glucose‐modified ruthenium complexes suppressing cell migration of highly invasive cancer cell lines. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5318] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Martin Lamač
- Academy of Sciences of the Czech RepublicJ. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3, 182 23 Prague Czech Republic
| | - Michal Horáček
- Academy of Sciences of the Czech RepublicJ. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3, 182 23 Prague Czech Republic
| | - Lucie Červenková Šťastná
- Academy of Sciences of the Czech RepublicInstitute of Chemical Process Fundamentals v.v.i., Rozvojová 135, 165 02 Prague Czech Republic
| | - Jindřich Karban
- Academy of Sciences of the Czech RepublicInstitute of Chemical Process Fundamentals v.v.i., Rozvojová 135, 165 02 Prague Czech Republic
| | - Lucia Sommerová
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 Brno Czech Republic
| | - Hana Skoupilová
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 Brno Czech Republic
| | - Roman Hrstka
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 Brno Czech Republic
| | - Jiří Pinkas
- Academy of Sciences of the Czech RepublicJ. Heyrovský Institute of Physical Chemistry v.v.i., Dolejškova 2155/3, 182 23 Prague Czech Republic
| |
Collapse
|
15
|
Šimková L, Svoboda J, Pinkas J, Skoupilová H, Hrstka R, Dunlop D, Lamač M, Gyepes R, Ludvík J. Electrochemical Study of Highly Substituted Titanocene Dihalides. ELECTROANAL 2019. [DOI: 10.1002/elan.201900464] [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: 11/05/2022]
Affiliation(s)
- Ludmila Šimková
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Jan Svoboda
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Hana Skoupilová
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - Roman Hrstka
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - David Dunlop
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
- Department of Inorganic ChemistryCharles University Hlavova 2030 128 43 Prague 2 Czech Republic
| | - Jiří Ludvík
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| |
Collapse
|
16
|
Šimková L, Svoboda J, Pinkas J, Skoupilová H, Hrstka R, Dunlop D, Lamač M, Gyepes R, Ludvík J. Cover Feature: Electrochemical Study of Highly Substituted Titanocene Dihalides (Electroanalysis 10/2019). ELECTROANAL 2019. [DOI: 10.1002/elan.201981004] [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: 11/08/2022]
Affiliation(s)
- Ludmila Šimková
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Jan Svoboda
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Hana Skoupilová
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - Roman Hrstka
- Regional Centre for Applied and Molecular OncologyMasaryk Memorial Cancer Institute Žlutý kopec 7 65653 Brno Czech Republic
| | - David Dunlop
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
- Department of Inorganic ChemistryCharles University Hlavova 2030 128 43 Prague 2 Czech Republic
| | - Jiří Ludvík
- J. Heyrovský Institute of Physical ChemistryCzech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| |
Collapse
|
17
|
Ončák M, Meißner R, Arthur-Baidoo E, Denifl S, Luxford TFM, Pysanenko A, Fárník M, Pinkas J, Kočišek J. Ring Formation and Hydration Effects in Electron Attachment to Misonidazole. Int J Mol Sci 2019; 20:E4383. [PMID: 31489947 PMCID: PMC6770096 DOI: 10.3390/ijms20184383] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 12/14/2022] Open
Abstract
We study the reactivity of misonidazole with low-energy electrons in a water environment combining experiment and theoretical modelling. The environment is modelled by sequential hydration of misonidazole clusters in vacuum. The well-defined experimental conditions enable computational modeling of the observed reactions. While the NO 2 - dissociative electron attachment channel is suppressed, as also observed previously for other molecules, the OH - channel remains open. Such behavior is enabled by the high hydration energy of OH - and ring formation in the neutral radical co-fragment. These observations help to understand the mechanism of bio-reductive drug action. Electron-induced formation of covalent bonds is then important not only for biological processes but may find applications also in technology.
Collapse
Affiliation(s)
- Milan Ončák
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
| | - Rebecca Meißner
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Eugene Arthur-Baidoo
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
- Center for Biomolecular Sciences Innsbruck, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
| | - Thomas F M Luxford
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Andriy Pysanenko
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Michal Fárník
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Jaroslav Kočišek
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| |
Collapse
|
18
|
Pinkas J, Mach K, Kubišta J, Horáček M, Szarka K, Gyepes R. Insertion of 1-t-butylpropyne into singly tucked-in permethyltitanocene. Synthesis, crystal structure of product and transition-state geometry. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
19
|
Affiliation(s)
- Adam Šimarek
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| |
Collapse
|
20
|
Pinkas J, Gyepes R, Císařová I, Kubišta J, Horáček M, Žilková N, Mach K. Hydrogenation of titanocene and zirconocene bis(trimethylsilyl)acetylene complexes. Dalton Trans 2018; 47:8921-8932. [PMID: 29916518 DOI: 10.1039/c8dt01909f] [Citation(s) in RCA: 8] [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: 11/21/2022]
Abstract
Reactions following the addition of dihydrogen under maximum atmospheric pressure to bis(trimethylsilyl)acetylene (BTMSA) complexes of titanocenes, [(η5-C5H5-nMen)2Ti(η2-BTMSA)] (n = 0, 1, 3, and 4) (1A-1D), and zirconocenes, [(η5-C5H5-nMen)2Zr(η2-BTMSA)] (n = 2-5) (4A-4D), proceeded in diverse ways and, depending on the metal, afforded different products. The former complexes lost, in all cases, their BTMSA ligand via its hydrogenation to bis-1,2-(trimethylsilyl)ethane when reacted at 80 °C for a prolonged reaction time. For n = 0, 1, and 3, the titanocene species formed in situ dimerised via the formation of fulvalene ligands and two bridging hydride ligands, giving known green dimeric titanocenes (2A-2C). For n = 4, a titanocene hydride [(η5-C5HMe4)2TiH] (2D) was formed, similarly to the known [(η5-C5Me5)2TiH] (2E) for n = 5; however, in contrast to this example, 2D in the absence of dihydrogen spontaneously dehydrogenated to the known Ti(iii)-Ti(iii) dehydro-dimer [{Ti(η5-C5HMe4)(μ-η1:η5-C5Me4)}2] (3B). This complex has now been fully characterised via spectroscopic methods, and was shown through EPR spectroscopy to attain an intramolecular electronic triplet state. The zirconocene-BTMSA complexes 4A-4D reacted uniformly with one hydrogen molecule to give Zr(iv) zirconocene hydride alkenyls, [(η5-C5H5-nMen)2ZrH{C(SiMe3)[double bond, length as m-dash]CH(SiMe3)}] (n = 2-5) (5A-5D). These were identified through their 1H and 13C NMR spectra, which show features typical of an agostically bonded proton, [double bond, length as m-dash]CH(SiMe3). Compounds 5A-5D formed equilibria with the BTMSA complexes 4A-4D depending on hydrogen pressure and temperature.
Collapse
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | | | | | | | | | | | | |
Collapse
|
21
|
Varga V, Pinkas J, Císařová I, Kubišta J, Horáček M, Mach K, Gyepes R. Chromocene-Cyclopentadienyltitanium Trichloride Ion Pairs and Their Rearrangement to Titanocene Chloride-Cyclopentadienylchromium Dichlorides - Ethylene Polymerization Tests. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Vojtech Varga
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry; Charles University; Hlavova 2030 128 40 Prague 2 Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry; Academy of Sciences of the Czech Republic; v.v.i., Dolejškova 3 182 23 Prague 8 Czech Republic
- Department of Inorganic Chemistry; Charles University; Hlavova 2030 128 40 Prague 2 Czech Republic
| |
Collapse
|
22
|
Hodík T, Lamač M, Červenková Šťastná L, Cuřínová P, Karban J, Skoupilová H, Hrstka R, Císařová I, Gyepes R, Pinkas J. Improving cytotoxic properties of ferrocenes by incorporation of saturated N-heterocycles. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.06.005] [Citation(s) in RCA: 7] [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: 01/16/2023]
|
23
|
Varga V, Večeřa M, Gyepes R, Pinkas J, Horáček M, Merna J, Lamač M. Back Cover: Effects of the Linking of Cyclopentadienyl and Ketimide Ligands in Titanium Half-Sandwich Olefin Polymerization Catalysts (ChemCatChem 16/2017). ChemCatChem 2017. [DOI: 10.1002/cctc.201701278] [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: 11/08/2022]
Affiliation(s)
- Vojtech Varga
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Miloš Večeřa
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
- Department of Inorganic Chemistry; Faculty of Science; Charles University in Prague; Hlavova 2030 12840 Prague 2 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Jan Merna
- Department of Polymers; University of Chemistry and Technology Prague; Technická 5 166 28 Prague 6 Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| |
Collapse
|
24
|
Varga V, Mach K, Pinkas J, Kubišta J, Szarka K, Gyepes R. Synthesis, structure, spectral properties and theoretical studies of two half-sandwich titanium-complexes with adamantoxy ligands. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.04.072] [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: 11/28/2022]
|
25
|
Varga V, Večeřa M, Gyepes R, Pinkas J, Horáček M, Merna J, Lamač M. Effects of the Linking of Cyclopentadienyl and Ketimide Ligands in Titanium Half-Sandwich Olefin Polymerization Catalysts. ChemCatChem 2017. [DOI: 10.1002/cctc.201700498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Vojtech Varga
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Miloš Večeřa
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
- Department of Inorganic Chemistry; Faculty of Science; Charles University in Prague; Hlavova 2030 12840 Prague 2 Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Jan Merna
- Department of Polymers; University of Chemistry and Technology Prague; Technická 5 166 28 Prague 6 Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences, v.v.i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| |
Collapse
|
26
|
Pinkas J, Gyepes R, Císařová I, Kubišta J, Horáček M, Mach K. Decamethyltitanocene hydride intermediates in the hydrogenation of the corresponding titanocene-(η 2-ethene) or (η 2-alkyne) complexes and the effects of bulkier auxiliary ligands. Dalton Trans 2017; 46:8229-8244. [PMID: 28617500 DOI: 10.1039/c7dt01545c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
1H NMR studies of reactions of titanocene [Cp*2Ti] (Cp* = η5-C5Me5) and its derivatives [Cp*(η5:η1-C5Me4CH2)TiMe] and [Cp*2Ti(η2-CH2[double bond, length as m-dash]CH2)] with excess dihydrogen at room temperature and pressures lower than 1 bar revealed the formation of dihydride [Cp*2TiH2] (1) and the concurrent liberation of either methane or ethane, depending on the organometallic reactant. The subsequent slow decay of 1 yielding [Cp*2TiH] (2) was mediated by titanocene formed in situ and controlled by hydrogen pressure. The crystalline products obtained by evaporating a hexane solution of fresh [Cp*2Ti] in the presence of hydrogen contained crystals having either two independent molecules of 1 in the asymmetric part of the unit cell or cocrystals consisting of 1 and [Cp*2Ti] in a 2 : 1 ratio. Hydrogenation of alkyne complexes [Cp*2Ti(η2-R1C[triple bond, length as m-dash]CR2)] (R1 = R2 = Me or Et) performed at room temperature afforded alkanes R1CH2CH2R2, and after removing hydrogen, 2 was formed in quantitative yields. For alkyne complexes containing bulkier substituent(s) R1 = Me or Ph, R2 = SiMe3, and R1 = R2 = Ph or SiMe3, successful hydrogenation required the application of increased temperatures (70-80 °C) and prolonged reaction times, in particular for bis(trimethylsilyl)acetylene. Under these conditions, no transient 1 was detected during the formation of 2. The bulkier auxiliary ligands η5-C5Me4tBu and η5-C5Me4SiMe3 did not hinder the addition of dihydrogen to the corresponding titanocenes [(η5-C5Me4tBu)2Ti] and [(η5-C5Me4SiMe3)2Ti] yielding [(η5-C5Me4tBu)2TiH2] (3) and [(η5-C5Me4SiMe3)2TiH2] (4), respectively. In contrast to 1, the dihydride 4 did not decay with the formation of titanocene monohydride, but dissociated to titanocene upon dihydrogen removal. The monohydrides [(η5-C5Me4tBu)2TiH] (5) and [(η5-C5Me4SiMe3)2TiH] (6) were obtained by insertion of dihydrogen into the intramolecular titanium-methylene σ-bond in compounds [(η5-C5Me4tBu)(η5:η1-C5Me4CMe2CH2)Ti] and [(η5-C5Me4SiMe3)(η5:η1-C5Me4SiMe2CH2)Ti], respectively. The steric influence of the auxiliary ligands became clear from the nature of the products obtained by reacting 5 and 6 with butadiene. They appeared to be the exclusively σ-bonded η1-but-2-enyl titanocenes (7) and (8), instead of the common π-bonded derivatives formed for the sterically less congested titanocenes, including [Cp*2Ti(η3-(1-methylallyl))] (9). The molecular structure optimized by DFT for compound 1 acquired a distinctly lower total energy than the analogously optimized complex with a coordinated dihydrogen [Cp*2Ti(η2-H2)]. The stabilization energies of binding the hydride ligands to the bent titanocenes were estimated from counterpoise computations; they showed a decrease in the order 1 (-132.70 kJ mol-1), 3 (-121.11 kJ mol-1), and 4 (-112.35 kJ mol-1), in accordance with the more facile dihydrogen dissociation.
Collapse
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | | | | | | | | | | |
Collapse
|
27
|
Setiady Y, Lanieri L, Ab O, Maloney E, Hong E, Qiu Q, Zhou Y, Zhao J, Themeles M, Zhang X, Pinkas J, Ruiz Soto R, Ponte J. Preclinical evaluation of M-DGN549, a folate receptor alpha-targeting antibody–drug conjugate (ADC) with a DNA-alkylating payload. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)33030-1] [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: 10/20/2022]
|
28
|
Fridrichová A, Varga V, Pinkas J, Lamač M, Růžička A, Horáček M. Yttrocene Chloride and Methyl Complexes with Variously Substituted Cyclopentadienyl Ligands: Synthesis, Characterization, and Reactivity toward Ethylene. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Adéla Fridrichová
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i.Dolejškova 318223Prague 8Czech Republic
- Department of General and Inorganic ChemistryFaculty of Chemical TechnologyUniversity of PardubiceStudentská 57353210Pardubice 2Czech Republic
| | - Vojtech Varga
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i.Dolejškova 318223Prague 8Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i.Dolejškova 318223Prague 8Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i.Dolejškova 318223Prague 8Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic ChemistryFaculty of Chemical TechnologyUniversity of PardubiceStudentská 57353210Pardubice 2Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech Republic v.v.i.Dolejškova 318223Prague 8Czech Republic
| |
Collapse
|
29
|
Varga V, Lamač M, Horáček M, Gyepes R, Pinkas J. Hydrosilane-B(C6F5)3 adducts as activators in zirconocene catalyzed ethylene polymerization. Dalton Trans 2016; 45:10146-50. [PMID: 27254815 DOI: 10.1039/c6dt01946c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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
Hydrosilane-B(C6F5)3 adducts were found to activate zirconocene dihalides and generate ternary catalytic systems possessing moderate to high activity in ethylene polymerization to high density polyethylene (HDPE). The activation efficacy of the adducts increased with increasing hydride donor ability and decreased with steric crowding of the particular hydrosilane used. NMR investigation of the HSiEt3/B(C6F5)3/Cp*2ZrF2 system (Cp* = η(5)-C5Me5) revealed the formation of a stable intermediate [Cp*2ZrF(FSiEt3-κF)](+)[HB(C6F5)3](-), whereas a crucial role of the [HB(C6F5)3](-) anion as a hydride donor for generation of an active cationic zirconium hydride center was elucidated.
Collapse
Affiliation(s)
- Vojtech Varga
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| |
Collapse
|
30
|
Večeřa M, Varga V, Císařová I, Pinkas J, Kucharczyk P, Sedlařík V, Lamač M. Group 4 Metal Complexes of Chelating Cyclopentadienyl-ketimide Ligands. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Miloš Večeřa
- J.
Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, v.v.i., Dolejškova 2155/3, 18223 Prague 8, Czech Republic
- Department
of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Vojtech Varga
- J.
Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, v.v.i., Dolejškova 2155/3, 18223 Prague 8, Czech Republic
| | - Ivana Císařová
- Department
of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Jiří Pinkas
- J.
Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, v.v.i., Dolejškova 2155/3, 18223 Prague 8, Czech Republic
| | - Pavel Kucharczyk
- Centre
of Polymer Systems, University Institute, Tomáš Bat’a University in Zlín, tř. T. Bati 5678, 76001 Zlín, Czech Republic
| | - Vladimír Sedlařík
- Centre
of Polymer Systems, University Institute, Tomáš Bat’a University in Zlín, tř. T. Bati 5678, 76001 Zlín, Czech Republic
| | - Martin Lamač
- J.
Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, v.v.i., Dolejškova 2155/3, 18223 Prague 8, Czech Republic
| |
Collapse
|
31
|
Gyepes R, Pinkas J, Císařová I, Kubišta J, Horáček M, Mach K. Synthesis, molecular and electronic structure of a stacked half-sandwich dititanium complex incorporating a cyclic π-faced bridging ligand. RSC Adv 2016. [DOI: 10.1039/c6ra14940e] [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] Open
Abstract
The thermally robust ground singlet state complex [bis(η5-pentamethylcyclopentadienyltitanium)-μ-(η4:η4-1,2,4,5-tetrakis(trimethylsilyl)cyclohexa-1-4-diene-3,6-diyl)] (3) arises from thermolysis of Cp*TiMe3.
Collapse
Affiliation(s)
- Róbert Gyepes
- J. Selye University
- Department of Chemistry
- Faculty of Education
- 945 01 Komárno
- Slovak Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic, v.v.i
- 182 23 Prague 8
- Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University in Prague
- 128 40 Prague 2
- Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic, v.v.i
- 182 23 Prague 8
- Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic, v.v.i
- 182 23 Prague 8
- Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic, v.v.i
- 182 23 Prague 8
- Czech Republic
| |
Collapse
|
32
|
Pinkas J, Císařová I, Gyepes R, Kubišta J, Mach K, Horáček M. Substituent effects in reduction-induced synthesis of ansa-titanocenes. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-0006-3] [Citation(s) in RCA: 2] [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: 11/30/2022]
|
33
|
Pinkas J, Lamač M. Transformations of functional groups attached to cyclopentadienyl or related ligands in group 4 metal complexes. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
34
|
Pinkas J, Gyepes R, Císařová I, Kubišta J, Horáček M, Mach K. Displacement of ethene from the decamethyltitanocene-ethene complex with internal alkynes, substituent-dependent alkyne-to-allene rearrangement, and the electronic transition relevant to the back-bonding interaction. Dalton Trans 2015; 44:7276-91. [PMID: 25791134 DOI: 10.1039/c5dt00351b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The titanocene-ethene complex [Ti(II)(η(2)-C2H4)(η(5)-C5Me5)2] (1) with simple internal alkynes R(1)C≡CR(2) gives complexes [Ti(II)(η(2)-R(1)C≡CR(2))(η(5)-C5Me5)2] {R(1), R(2): Ph, Ph (3), Ph, Me (4), Me, SiMe3 (5), Ph, SiMe3 (6), t-Bu, SiMe3 (7), and SiMe3, SiMe3 (8). In contrast, alkynes with R(1) = Me and R(2) = t-Bu or i-Pr afford allene complexes [Ti(II)(η(2)-CH2=C=CHR(2))(η(5)-C5Me5)2] (11) and (12), whereas for R(2) = Et a mixture of alkyne complex (13A) and minor allene (13) is obtained. Crystal structures of 4, 6, 7 and 11 have been determined; the latter structure proved the back-bonding interaction of the allene terminal double bond. Only the synthesis of 8 from 1 was inefficient because the equilibrium constant for the reaction [1] + [Me3SiC≡CSiMe3] ⇌ [8] + [C2H4] approached 1. Compound 9 (R(1), R(2): Me), not obtainable from 1, together with compounds 3–6 and 10 (R(1), R(2): Et) were also prepared by alkyne exchange with 8, however this reaction did not take place in attempts to obtain 7. Compounds 1 and 3–9 display the longest-wavelength electronic absorption band in the range 670-940 nm due to the HOMO → LUMO transition. The assignment of the first excitation to be of predominantly a b2 → a1 transition was confirmed by DFT calculations. The calculated first excitation energies for 3–9 followed the order of hypsochromic shifts of the absorption band relative to 8 that were induced by acetylene substituents: Me > Ph ≫ SiMe3. Computational results have also affirmed the back-bonding nature in the alkyne-to-metal coordination.
Collapse
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
| | | | | | | | | | | |
Collapse
|
35
|
Varga V, Hodík T, Lamač M, Horáček M, Zukal A, Žilková N, Parker WO, Pinkas J. Homogeneous and heterogeneous cyclopentadienyl-arene titanium catalysts for selective ethylene trimerization to 1-hexene. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.11.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
36
|
Bartošík M, Koubková L, Karban J, Červenková Šťastná L, Hodík T, Lamač M, Pinkas J, Hrstka R. Electrochemical analysis of a novel ferrocene derivative as a potential antitumor drug. Analyst 2015. [DOI: 10.1039/c5an00958h] [Citation(s) in RCA: 12] [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: 11/21/2022]
Abstract
Ferrocenes represent an interesting group of drugs with potential antitumor properties.
Collapse
Affiliation(s)
- M. Bartošík
- RECAMO
- Masaryk Memorial Cancer Institute
- 656 53 Brno
- Czech Republic
| | - L. Koubková
- RECAMO
- Masaryk Memorial Cancer Institute
- 656 53 Brno
- Czech Republic
| | - J. Karban
- Institute of Chemical Process Fundamentals of the CAS
- 165 02 Prague 6
- Czech Republic
| | | | - T. Hodík
- J. Heyrovský Institute of Physical Chemistry of the CAS
- 182 23 Prague 8
- Czech Republic
| | - M. Lamač
- J. Heyrovský Institute of Physical Chemistry of the CAS
- 182 23 Prague 8
- Czech Republic
| | - J. Pinkas
- J. Heyrovský Institute of Physical Chemistry of the CAS
- 182 23 Prague 8
- Czech Republic
| | - R. Hrstka
- RECAMO
- Masaryk Memorial Cancer Institute
- 656 53 Brno
- Czech Republic
| |
Collapse
|
37
|
Abstract
Two different kinds of nitrogen ligands and two Cp ligands with different electronic and steric effects were employed in order to demonstrate variability of the group 4 metal coordination spheres.
Collapse
Affiliation(s)
- Aleš Havlík
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
- Department of General and Inorganic Chemistry
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- 532 10 Pardubice 2
- Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
| |
Collapse
|
38
|
Sopoušek J, Zobač O, Buršík J, Roupcová P, Vykoukal V, Brož P, Pinkas J, Vřešt'ál J. Heat-induced spinodal decomposition of Ag–Cu nanoparticles. Phys Chem Chem Phys 2015; 17:28277-85. [PMID: 25929324 DOI: 10.1039/c5cp00198f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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 predicted spinodal decomposition of metastable Ag–Cu nanoparticles was experimentally induced (and detected) by heating on an high temperature X-ray diffractometer (HT XRD).
Collapse
Affiliation(s)
- Jiří Sopoušek
- Department of Chemistry
- Faculty of Sciences
- Masaryk University
- 611 37 Brno
- Czech Republic
| | - Ondřej Zobač
- Department of Chemistry
- Faculty of Sciences
- Masaryk University
- 611 37 Brno
- Czech Republic
| | - Jiří Buršík
- Institute of Physics of Materials
- Academy of Sciences of the Czech Republic
- 616 62 Brno
- Czech Republic
| | - Pavla Roupcová
- Institute of Physics of Materials
- Academy of Sciences of the Czech Republic
- 616 62 Brno
- Czech Republic
| | - Vít Vykoukal
- Department of Chemistry
- Faculty of Sciences
- Masaryk University
- 611 37 Brno
- Czech Republic
| | - Pavel Brož
- Department of Chemistry
- Faculty of Sciences
- Masaryk University
- 611 37 Brno
- Czech Republic
| | - Jiří Pinkas
- Department of Chemistry
- Faculty of Sciences
- Masaryk University
- 611 37 Brno
- Czech Republic
| | - Jan Vřešt'ál
- Central European Institute of Technology
- Masaryk University
- CEITEC
- 625 00 Brno
- Czech Republic
| |
Collapse
|
39
|
Pinkas J, Gyepes R, Císařová I, Kubišta J, Horáček M, Mach K. Steric Effects in Reactions of Decamethyltitanocene Hydride with Internal Alkynes, Conjugated Diynes, and Conjugated Dienes. Organometallics 2014. [DOI: 10.1021/om500296h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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)
- Jiří Pinkas
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Róbert Gyepes
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
- Faculty
of Education, J. Selye University, Bratislavská cesta 3322, 945 01 Komárno, Slovak Republic
- Department
of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Ivana Císařová
- Department
of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jiří Kubišta
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Karel Mach
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| |
Collapse
|
40
|
Hodík T, Lamač M, Červenková Št’astná L, Karban J, Koubková L, Hrstka R, Císařová I, Pinkas J. Titanocene Dihalides and Ferrocenes Bearing a Pendant α-d-Xylofuranos-5-yl or α-d-Ribofuranos-5-yl Moiety. Synthesis, Characterization, and Cytotoxic Activity. Organometallics 2014. [DOI: 10.1021/om500200r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Tomáš Hodík
- J. Heyrovský
Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182
23 Prague 8, Czech Republic
| | - Martin Lamač
- J. Heyrovský
Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182
23 Prague 8, Czech Republic
| | - Lucie Červenková Št’astná
- Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, v.v.i., Rozvojová 135, 165 02 Prague 6, Czech Republic
| | - Jindřich Karban
- Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, v.v.i., Rozvojová 135, 165 02 Prague 6, Czech Republic
| | - Lucie Koubková
- Regional Centre
for Applied and Molecular Oncology, Masaryk Memorial Cancer Institute, Žlutý kopec 7, 65653 Brno, Czech Republic
| | - Roman Hrstka
- Regional Centre
for Applied and Molecular Oncology, Masaryk Memorial Cancer Institute, Žlutý kopec 7, 65653 Brno, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Jiří Pinkas
- J. Heyrovský
Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182
23 Prague 8, Czech Republic
| |
Collapse
|
41
|
Horáček M, Císařová I, Gyepes R, Kubišta J, Pinkas J, Lamač M, Mach K. Synthesis, structure, and sunlight photolysis of benzyl- and tert-butyl-substituted octamethyltitanocene dihydrosulfides. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
42
|
Mijatović S, Bulatović M, Mojić M, Stošić-Grujičić S, Miljković D, Maksimović-Ivanić D, Gómez-Ruiz S, Pinkas J, Horáček M, Kaluđerović GN. Study of the anticancer properties of methyl- and phenyl-substituted carbon- and silicon-bridged ansa-titanocene complexes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.07.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
43
|
Pinkas J, Císařová I, Gyepes R, Kubišta J, Horáček M, Mach K. Synthesis and Structure of Titanium(III) Bis(decamethyltitanocene) Oxide. Organometallics 2013. [DOI: 10.1021/om400624y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
- Faculty of Education, J. Selye University, Bratislavská cesta 3322, 945
01 Komárno, Slovak Republic
| | - Jiří Kubišta
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| | - Michal Horáček
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| | - Karel Mach
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| |
Collapse
|
44
|
Strašák T, Sýkora J, Lamač M, Kubišta J, Horáček M, Gyepes R, Pinkas J. Reactivity of a Titanocene Pendant Si–H Group toward Alcohols. Unexpected Formation of Siloxanes from the Reaction of Hydrosilanes and Ph3COH Catalyzed by B(C6F5)3. Organometallics 2013. [DOI: 10.1021/om400253g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomáš Strašák
- Institute
of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, v.v.i., Rozvojová
135, 165 02 Prague 6, Czech Republic
| | - Jan Sýkora
- Institute
of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, v.v.i., Rozvojová
135, 165 02 Prague 6, Czech Republic
| | - Martin Lamač
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3,
182 23 Prague 8, Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3,
182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3,
182 23 Prague 8, Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3,
182 23 Prague 8, Czech Republic
- J. Selye University, Faculty of Education, Bratislavská
cesta 3322, 945 01 Komárno, Slovak Republic
| | - Jiří Pinkas
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3,
182 23 Prague 8, Czech Republic
| |
Collapse
|
45
|
Gyepes R, Císařová I, Pinkas J, Kubišta J, Horáček M, Mach K. Sunlight Photolysis of Decamethyltitanocene Dihydrosulfide Affords the Titanium Sulfide Cage Clusters (Cp*Ti)
6
S
8
and (Cp*Ti)
4
S
6. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300391] [Citation(s) in RCA: 4] [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: 11/05/2022]
Affiliation(s)
- Róbert Gyepes
- J. Selye University, Faculty of Education, Bratislavská cesta 3322, 945 01 Komárno, Slovak Republic
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic, http://www.jh‐inst.cas.cz
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic, http://www.jh‐inst.cas.cz
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic, http://www.jh‐inst.cas.cz
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic, http://www.jh‐inst.cas.cz
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic, http://www.jh‐inst.cas.cz
| |
Collapse
|
46
|
Pinkas J, Císařová I, Kubišta J, Horáček M, Lamač M. Synthetic transformations of a pendant nitrile moiety in group 4 metallocene complexes. Dalton Trans 2013; 42:7101-10. [DOI: 10.1039/c3dt50209k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
47
|
Pinkas J, Císařová I, Gyepes R, Kubišta J, Horáček M, Mach K. Ethene Complexes of Bulky Titanocenes, Their Thermolysis, and Their Reactivity toward 2-Butyne. Organometallics 2012. [DOI: 10.1021/om300461k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Róbert Gyepes
- Faculty of Education, J. Selye University, Bratislavská cesta 3322, 945 01 Komárno,
Slovak Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| |
Collapse
|
48
|
|
49
|
Pinkas J, Gyepes R, Kubišta J, Horáček M, Mach K. Ethene Elimination during Thermolysis of Bis(3-butenyltetramethylcyclopentadienyl)dimethyltitanium. Organometallics 2011. [DOI: 10.1021/om2001487] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Róbert Gyepes
- J. Selye University, Pedagogical Faculty, Bratislavská cesta 3322, 945 01 Komárno, Slovak Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| |
Collapse
|
50
|
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| |
Collapse
|