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Sidorenko GV, Miroslavov AE, Tyupina MY. Technetium(I) carbonyl complexes for nuclear medicine: Coordination-chemical aspect. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Kama DV, Frei A, Brink A, Braband H, Alberto R, Roodt A. New approach for the synthesis of water soluble fac-[M I(CO) 3] + bis(diarylphosphino)alkylamine complexes (M = 99Tc, Re). Dalton Trans 2021; 50:17506-17514. [PMID: 34747429 DOI: 10.1039/d1dt03234h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel proof-of-concept is reported to modify the water solubility and potential biological effects of a bis(diphenylphosphino)alkylamine (PNP) ligand and the corresponding metal complex, by introducing an amine group on the outer periphery of the pendant ligand arm. Thus, a tertiary butoxycarbonyl protected N'-Boc-ethylenediamine-N,N-bis(diphenylphosphino) (N'-Boc-PNP) ligand (1) was synthesized by reacting the protected ethylenediamine and chlorodiphenylphosphine in a 1 : 2 molar ratio. The corresponding fac-[Re(CO)3(N'-Boc-PNP)Br] (1A) complex was then obtained by reacting N'-Boc-PNP (1) with (Et4N)2fac-[Re(CO)3Br3] in equimolar amounts in DCM at 50 °C. De-protection of the N'-Boc pendant amine group in 1A with TFA leads to fac-[Re(NH3+-PNP)(CO)3Br]·CF3COO- (1B) which is soluble in D2O (>0.05 M). Treating 1B with saturated aqueous NaHCO3 yields fac-[Re(NH2-PNP)(CO)3Br]·MeOH (1C) in near quantitative yield. Although both 1A and 1C are not soluble in D2O, addition of TFA easily generates 1B (31P NMR), confirming the formation of the protonated amine. Isolation of fac-[99Tc(CO)3(N-Boc-PNP)(Cl)] (1D) confirmed that the rhenium and technetium (99Tc) can be easily interchanged in this process. Reported are hence the unique rhenium series of compounds 1A, 1B and 1C and the corresponding technetium complex 1D, unequivocally characterized by single crystal XRD, as well as IR and 1H NMR spectroscopy. Preliminary antimicrobial evaluation indicates that ligand 1 and its respective rhenium complexes (1A-1C) were not active against selected fungi (Candida albicans and Cryptococcus neoformans) and bacteria (Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Staphylococcus aureus). These types of ligands and complexes therefore present themselves as excellent radio models for further evaluation using 186Re, 188Re and 99mTc to potentially study the radiotoxicity of appropriately designed complexes.
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Affiliation(s)
- Dumisani V Kama
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, South Africa, 9300.
| | - Angelo Frei
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
| | - Alice Brink
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, South Africa, 9300.
| | - Henrik Braband
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
| | - Roger Alberto
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
| | - Andreas Roodt
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, South Africa, 9300.
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3
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The kinetic substitution reactions and structural analysis of manganese(I) acetylacetonato complexes. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Borràs J, Lecina J, Foster J, Kashani R, Melendez-Alafort L, Sosabowski J, Suades J. Bioconjugated technetium carbonyls by transmetalation reaction with zinc derivatives. Bioorg Med Chem Lett 2021; 37:127840. [PMID: 33556570 DOI: 10.1016/j.bmcl.2021.127840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/20/2021] [Accepted: 01/26/2021] [Indexed: 12/14/2022]
Abstract
The transmetalation reaction between zinc dithiocarbamates functionalized with organic groups and the cation fac-[99mTc(H2O)3(CO)3]+ has been studied as a new strategy to bind biomolecules to this radionuclide for preparing radiopharmaceuticals with high molar activity. All complexes were obtained in high yields by heating at moderate temperatures and without subsequent purification. The chemical identity was ascertained by HPLC comparison with the homologous rhenium complexes. Stability studies in cysteine solution and serum have shown a good stability of the coordination set fac-[99mTc(CO)3(SS)(P)]. Preliminary biological studies of the radiocomplex functionalized with D-(+)-glucosamine with carcinoma cells have been performed.
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Affiliation(s)
- Jordi Borràs
- Departament de Química, Edifici C, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Joan Lecina
- Departament de Química, Edifici C, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Julie Foster
- Barts Cancer Institute, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, United Kingdom
| | - Roxana Kashani
- Barts Cancer Institute, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, United Kingdom
| | | | - Jane Sosabowski
- Barts Cancer Institute, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, United Kingdom
| | - Joan Suades
- Departament de Química, Edifici C, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain.
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Kama DV, Frei A, Schutte-Smith M, Brink A, Swart C, Braband H, Alberto R, Roodt A. Exploring preliminary structural relationships and mitochondrial targeting of fac-[MI(CO)3]-bis(diarylphosphino)alkylamine complexes (M = 99Tc, Re). NEW J CHEM 2021. [DOI: 10.1039/d1nj04273d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Preliminary structural relationships in fac-[MI(CO)3]-bis(diarylphosphino)alkylamine complexes (M = 99Tc, Re), antimicrobial and mitochondrial targeting are reported.
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Affiliation(s)
- Dumisani V. Kama
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Angelo Frei
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Marietjie Schutte-Smith
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Alice Brink
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Chantel Swart
- Department of Biochemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - Henrik Braband
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Roger Alberto
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Andreas Roodt
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
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Jacobs FJF, Venter GJS, Fourie E, Kroon RE, Brink A. Substitution reactivity and structural variability induced by tryptamine on the biomimetic rhenium tricarbonyl complex. RSC Adv 2021; 11:24443-24455. [PMID: 35479015 PMCID: PMC9036643 DOI: 10.1039/d1ra03750a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/02/2021] [Indexed: 01/28/2023] Open
Abstract
A series of seven fac-[Re(CO)3(5Me-Sal-Trypt)(L)] complexes containing tryptamine on the N,O 5-methyl-salicylidene bidentate ligand backbone and where L is MeOH, Py, Imi, DMAP, PPh3 coordinated to the 6th position have been studied, including the formation of a dinuclear Re2 cluster. The crystallographic solid state structures show marked similarity in structural tendency, in particular the rigidity of the Re core and the hydrogen bond interactions similar to those found in protein structures. The rates of formation and stability of the complexes were evaluated by rapid time-resolved stopped-flow techniques and the methanol substitution reaction indicates the significant activation induced by the use of the N,O salicylidene bidentate ligand as manifested by the second-order rate constants for the entering nucleophiles. Both linear and limiting kinetics were observed and a systematic evaluation of the kinetics is reported clearly indicating an interchange type of intimate mechanism for the methanol substitution. The anticancer activity of compounds 1–7 was tested on HeLa cells and it was found that all compounds showed similar cytotoxicity where solubility allowed. IC50-values between ca. 11 and 22 μM indicate that some cytotoxicity resides most likely on the salicylidene–tryptamine ligand. The photoluminescence of the seven complexes is similar in maximum emission wavelength with little variation despite the broad range of ligands coordinated to the 6th position on the metal centre. The biomimetic tryptamine rhenium tricarbonyl complex shows rapid substitution reactivity on the 6th position as well as cytotoxicity and photoluminescence capability induced by the salicylidene bidentate ligand.![]()
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Affiliation(s)
| | | | - Eleanor Fourie
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Robin E. Kroon
- Department of Physics
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Alice Brink
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
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Kama DV, Brink A, Alberto R, Roodt A. Crystal structure of hexacarbonyl-(μ 2-methanoato-k 2
O: O′)-(μ 2–bis(di- p-tolylphosphino)cyclohexylamine-κ 2
P: P′)dirhenium(I), C 42H 45NO 8P 2Re 2. Z KRIST-NEW CRYST ST 2020. [DOI: 10.1515/ncrs-2019-0632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C42H45NO8P2Re2, monoclinic, C2/c (no. 15), a = 24.1612(7) Å, b = 13.0229(3) Å, c = 14.9180(4) Å, β = 121.383(3)°, V = 4007.2(2) Å3, Z = 4, R
gt(F) = 0.0235, wR
ref(F
2) = 0.0596, T = 173(2) K.
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Affiliation(s)
- Dumisani V. Kama
- University of the Free State , Chemistry Department , Nelson Mandela Drive , Bloemfontein 9300 , South Africa
| | - Alice Brink
- Department of Chemistry , University of the Free State , P.O. Box 339 , Bloemfontein 9300 , South Africa
| | - Roger Alberto
- Department of Chemistry , University of Zürich , Winterthurerstrasse, 190, 8057 , Zürich , Switzerland
| | - Andreas Roodt
- Department of Chemistry , University of the Free State , P.O. Box 339 , Bloemfontein 9300 , South Africa
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Schutte-Smith M, Roodt A, Visser HG. Ambient and high-pressure kinetic investigation of methanol substitution in fac-[Re(Trop)(CO)3(MeOH)] by different monodentate nucleophiles. Dalton Trans 2019; 48:9984-9997. [DOI: 10.1039/c9dt01528k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
First report of high-pressure methanol substitution by entering monodentate L forms fac-[Re(CO)3(Trop)(L)] {ΔV≠(kL) = +9 – +14 cm−3 mol−1}, indicating dissociative/dissociative interchange activation.
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Affiliation(s)
| | - Andreas Roodt
- Department of Chemistry
- University of the Free State
- PO Box 339
- Bloemfontein
- South Africa
| | - Hendrik G. Visser
- Department of Chemistry
- University of the Free State
- PO Box 339
- Bloemfontein
- South Africa
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9
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Nuclearity manipulation in Schiff-base fac-tricarbonyl complexes of Mn(I) and Re(I). Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.10.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kraack JP, Sévery L, Tilley SD, Hamm P. Plasmonic Substrates Do Not Promote Vibrational Energy Transfer at Solid-Liquid Interfaces. J Phys Chem Lett 2018; 9:49-56. [PMID: 29235870 DOI: 10.1021/acs.jpclett.7b02855] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Intermolecular vibrational energy transfer in monolayers of isotopically mixed rhenium carbonyl complexes at solid-liquid interfaces is investigated with the help of ultrafast 2D Attenuated Total Reflectance Infrared (2D ATR IR) spectroscopy in dependence of plasmonic surface enhancement effects. Dielectric and plasmonic materials are used to demonstrate that plasmonic effects have no impact on the vibrational energy transfer rate in a regime of moderate IR surface enhancement (enhancement factors up to ca. 30). This result can be explained with the common image-dipole picture. The vibrational energy transfer rate thus can be used as a direct observable to determine intermolecular distances on surfaces, regardless of their plasmonic properties.
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Affiliation(s)
- Jan Philip Kraack
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Laurent Sévery
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - S David Tilley
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Peter Hamm
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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Burianova VK, Bolotin DS, Mikherdov AS, Novikov AS, Mokolokolo PP, Roodt A, Boyarskiy VP, Dar’in D, Krasavin M, Suslonov VV, Zhdanov AP, Zhizhin KY, Kuznetsov NT. Mechanism of generation of closo-decaborato amidrazones. Intramolecular non-covalent B–H⋯π(Ph) interaction determines stabilization of the configuration around the amidrazone CN bond. NEW J CHEM 2018. [DOI: 10.1039/c8nj01018h] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three types of N(H)-nucleophiles were used to study the nucleophilic addition to the CN group of the 2-propanenitrilium closo-decaborate cluster giving N-closo-decaborato amidrazones.
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12
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Kraack JP, Frei A, Alberto R, Hamm P. Ultrafast Vibrational Energy Transfer in Catalytic Monolayers at Solid-Liquid Interfaces. J Phys Chem Lett 2017; 8:2489-2495. [PMID: 28521090 DOI: 10.1021/acs.jpclett.7b01034] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigate the ultrafast vibrational dynamics of monolayers from adsorbed rhenium-carbonyl CO2-reduction catalysts on a semiconductor surface (indium-tin-oxide (ITO)) with ultrafast two-dimensional attenuated total reflection infrared (2D ATR IR) spectroscopy. The complexes are partially equipped with isotope-labeled (13C) carbonyl ligands to generate two spectroscopically distinguishable forms of the molecules. Ultrafast vibrational energy transfer between the molecules is observed via the temporal evolution of cross-peaks between their symmetric carbonyl stretching vibrations. These contributions appear with time constant of 70 and 90 ps for downhill and uphill energy transfer, respectively. The energy transfer is thus markedly slower than any of the other intramolecular dynamics. From the transfer rate, an intermolecular distance of ∼4-5 Å can be estimated, close to the van der Waals distance of the molecular head groups. The present paper presents an important cornerstone for a better understanding of intermolecular coupling mechanisms of molecules on surfaces and explains the absence of similar features in earlier studies.
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Affiliation(s)
- Jan Philip Kraack
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Angelo Frei
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Roger Alberto
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Peter Hamm
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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