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Shahid N, Singh AK. Unravelling the kinetics of electro- and photochemical S → O linkage isomerization in Ru(II)-NHC-DMSO complexes utilised for photoinduced substitution reactions. Dalton Trans 2024; 53:12662-12675. [PMID: 39012321 DOI: 10.1039/d4dt01200c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Our recently reported Ru(III)-NHC complexes 1a and 1b were utilized as suitable precursors to prepare new Ru(II)-NHC-(DMSO)2 complexes 2a and 2b. Complexes 2a and 2b reacted with 2,2'-bipyridine to give complexes 3a and 3b, respectively, with substitution of only one of the DMSO ligands. All new complexes were characterized using various spectroscopic techniques and the molecular structures of 2a and 3a were determined using single-crystal X-ray diffraction technique. Complexes 2a, 2b, 3a, and 3b showed the S → O linkage isomerization of the DMSO ligand upon oxidation of the Ru centre from +II to +III, as confirmed by the thermodynamic and kinetic data obtained from cyclic voltammetry experiments. It was observed that in the bisdimethylsulfoxide complexes 2a and 2b, only one DMSO ligand isomerized, which was further corroborated by the computational studies performed to optimize the geometry of the possible linkage isomers of complexes 2a and 3a in +2 and +3 oxidation states, whereas complexes 3a and 3b showed a high preference for the O-bound isomer in the Ru(III) redox state. The role of NHC in stabilizing the mixed isomer in complexes 2a and 2b and preventing the isomerization of both DMSO ligands coordinated to the Ru centre was studied; moreover, NHC provided good solvent compatibility for photochemical S → O isomerization in all the complexes. Taking advantages of the photoinduced linkage isomerization in 2a and 2b, the synthesis of 3a and 3b was revisited and performed using 2a and 2b, respectively, following a photoinduced substitution reaction in the presence of 2,2'-bipyridine. The kinetics of the reversion from the O-bound to S-bound isomer was found to follow the DMSO-assisted intermolecular S → O isomerization pathway.
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Affiliation(s)
- Nida Shahid
- Department of Chemistry, Indian Institute of Technology-Indore, Simrol, Khandwa Road, 433552, India.
| | - Amrendra K Singh
- Department of Chemistry, Indian Institute of Technology-Indore, Simrol, Khandwa Road, 433552, India.
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2
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Chandra A, Basu P, Raha S, Dhibar P, Bhattacharya S. Development of ruthenium complexes with S-donor ligands for application in synthesis, catalytic acceptorless alcohol dehydrogenation and crossed-aldol condensation. Dalton Trans 2024; 53:10675-10685. [PMID: 38860941 DOI: 10.1039/d4dt00985a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
The reaction of [Ru(dmso)4Cl2] with a potassium salt of four xanthate (RO-C(S)S-; R = Me, Et, iPr and tBu) ligands (depicted as Ln; n = 1-4) in hot methanol afforded a group of mixed-ligand complexes of type [Ru(Ln)2(dmso)2]. The crystal structures of all the four complexes have been determined, which show that the xanthate ligands are bound to the metal center forming four-membered chelates and dmso is coordinated through sulfur and they are mutually cis. The relative thermodynamic stability of this cis and the other possible trans-isomers of these complexes has been assessed with the help of DFT calculations, which have revealed that the cis-isomer is the more stable isomer. The coordinated dmso in the [Ru(Ln)2(dmso)2] complexes could be easily displaced by chelating bidentate ligands (depicted as L') to furnish complexes of type [Ru(Ln)2(L')], as demonstrated through isolation of two such complexes, viz. [Ru(L3)2(bpy)] and [Ru(L2)2(phen)] (bpy = 2,2'-bipyridine and phen = 1,10-phenanthroline). The crystal structure of [Ru(L3)2(bpy)] has been determined and the structure of [Ru(L2)2(phen)] has been optimized by the DFT method. The electronic spectra of the four [Ru(Ln)2(dmso)2] complexes and the two derivatives ([Ru(Ln)2(L')]; n = 3, L' = bpy; n = 2, L' = phen), recorded in dichloromethane solutions, show intense absorptions spanning the visible and ultraviolet regions, which have been analyzed by the TDDFT method. The [Ru(Ln)2(dmso)2] complexes are found to serve as efficient catalyst precursors for the acceptorless dehydrogenation of 2-propanol followed by crossed-aldol condensation with substituted benzaldehydes (and related aldehydes), using tert-butoxide as the co-catalyst, producing dibenzylideneacetone derivatives in good yields.
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Affiliation(s)
- Anushri Chandra
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
| | - Pousali Basu
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
| | - Shreya Raha
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
| | - Papu Dhibar
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
- Department of Chemistry, Brainware University, Kolkata 700 125, India
| | - Samaresh Bhattacharya
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
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3
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Ru(II)-modified TiO2 nanoparticles for hypoxia-adaptive photo-immunotherapy of oral squamous cell carcinoma. Biomaterials 2022; 289:121757. [DOI: 10.1016/j.biomaterials.2022.121757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/02/2022] [Accepted: 08/18/2022] [Indexed: 11/15/2022]
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4
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Yeung CF, Tang SH, Yang Z, Li TY, Li KK, Chan YM, Shek HL, Io KW, Tam KT, Yiu SM, Tse MK, Wong CY. Ruthenafuran Complexes Supported by the Bipyridine-Bis(diphenylphosphino)methane Ligand Set: Synthesis and Cytotoxicity Studies. Molecules 2022; 27:molecules27051709. [PMID: 35268810 PMCID: PMC8911682 DOI: 10.3390/molecules27051709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/22/2022] [Accepted: 03/03/2022] [Indexed: 11/16/2022] Open
Abstract
Mononuclear and dinuclear Ru(II) complexes cis-[Ru(κ2-dppm)(bpy)Cl2] (1), cis-[Ru(κ2-dppe)(bpy)Cl2] (2) and [Ru2(bpy)2(μ-dpam)2(μ-Cl)2](Cl)2 ([3](Cl)2) were prepared from the reactions between cis(Cl), cis(S)-[Ru(bpy)(dmso-S)2Cl2] and diphosphine/diarsine ligands (bpy = 2,2′-bipyridine; dppm = 1,1-bis(diphenylphosphino)methane; dppe = 1,2-bis(diphenylphosphino)ethane; dpam = 1,1-bis(diphenylarsino)methane). While methoxy-substituted ruthenafuran [Ru(bpy)(κ2-dppe)(C^O)]+ ([7]+; C^O = anionic bidentate [C(OMe)CHC(Ph)O]− chelate) was obtained as the only product in the reaction between 2 and phenyl ynone HC≡C(C=O)Ph in MeOH, replacing 2 with 1 led to the formation of both methoxy-substituted ruthenafuran [Ru(bpy)(κ2-dppm)(C^O)]+ ([4]+) and phosphonium-ring-fused bicyclic ruthenafuran [Ru(bpy)(P^C^O)Cl]+ ([5]+; P^C^O = neutral tridentate [(Ph)2PCH2P(Ph)2CCHC(Ph)O] chelate). All of these aforementioned metallafuran complexes were derived from Ru(II)–vinylidene intermediates. The potential applications of these metallafuran complexes as anticancer agents were evaluated by in vitro cytotoxicity studies against cervical carcinoma (HeLa) cancer cell line. All the ruthenafuran complexes were found to be one order of magnitude more cytotoxic than cisplatin, which is one of the metal-based anticancer agents being widely used currently.
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Affiliation(s)
- Chi-Fung Yeung
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Sik-Him Tang
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Zhe Yang
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Tsun-Yin Li
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Ka-Kit Li
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Yuen-Man Chan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Hau-Lam Shek
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Kai-Wa Io
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - King-Ting Tam
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Man-Kit Tse
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
- Correspondence: ; Tel.: +852-3442-6831
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5
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Dorairaj DP, Lin YF, Haribabu J, Murugan T, Narwane M, Karvembu R, Neelakantan MA, Kao CL, Chiu CC, Hsu SCN. Binding mode transformation and biological activity on the Ru(II)-DMSO complexes bearing heterocyclic pyrazolyl ligands. J Inorg Biochem 2021; 223:111545. [PMID: 34303108 DOI: 10.1016/j.jinorgbio.2021.111545] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/28/2021] [Accepted: 07/12/2021] [Indexed: 12/19/2022]
Abstract
Three Ru(II)-DMSO complexes (1-3) containing 2-(3-pyrazolyl)pyridine (PzPy), 2-pyrazol-3-ylfuran (PzO), or 2-pyrazol-3-ylthiophene (PzS) ligand, were synthesized and characterized. The monodentate coordination of the heterocyclic pyrazolyl ligand (PzPy) with Ru(II) ion via N atom was confirmed by single crystal X-ray diffraction. Complex 1 could be converted to the known η2-bidentate PzPy complex cis(Cl), cis(S)-[RuCl2(PzPy)(DMSO)2] (4) under reflux conditions. The mechanism underlying binding mode transformation was studied by 1H NMR spectroscopy and density functional theory (DFT) calculations. The binding abilities of the complexes (1-4) with calf-thymus (CT) DNA and bovine serum albumin (BSA) were investigated using spectroscopic and molecular docking techniques. Among the four Ru(II) complexes, complexes 1 and 3 inhibited the long-term proliferation of human breast cancer cells, whereas complexes 2 and 4 did not inhibit their proliferation to a considerable extent. Interestingly, complexes 1 and 3 did not induce significant cell death but rather attenuated the clonogenicity of breast cancer cells by upregulating reactive oxygen species (ROS), endoplasmic reticulum (ER) and autophagic stress.
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Affiliation(s)
- Dorothy Priyanka Dorairaj
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India
| | - Ya-Fan Lin
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Jebiti Haribabu
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India
| | - Theetharappan Murugan
- Chemistry Research Centre, National Engineering College, K.R. Nagar, Kovilpatti, 628503 Thoothukudi District, Tamilnadu, India
| | - Manmath Narwane
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Ramasamy Karvembu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India
| | | | - Chai-Lin Kao
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chien-Chih Chiu
- Department of Medical Research, Kaohsiung Medical University Hospital, Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Sodio C N Hsu
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
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6
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Vidal A, Calligaro R, Gasser G, Alberto R, Balducci G, Alessio E. cis-Locked Ru(II)-DMSO Precursors for the Microwave-Assisted Synthesis of Bis-Heteroleptic Polypyridyl Compounds. Inorg Chem 2021; 60:7180-7195. [PMID: 33908778 PMCID: PMC8154425 DOI: 10.1021/acs.inorgchem.1c00240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
We describe a synthetic
strategy for the preparation of bis-heteroleptic
polypyridyl Ru(II) complexes of the type [Ru(L1)2(L2)]2+ (L1 and L2 = diimine ligands) from well-defined Ru(II) precursors.
For this purpose, a series of six neutral, anionic, and cationic cis-locked Ru(II)-DMSO complexes (2–7) of the general formula [Y] fac-[RuX(DMSO–S)3(O–O)]n (where O–O
is a symmetrical chelating anion: oxalate (ox), malonate (mal), acetylacetonate
(acac); X = DMSO–O or Cl–; n = −1/0/+1 depending on the nature and charge of X and O–O;
when present, Y = K+ or PF6–) were efficiently prepared from the well-known cis-[RuCl2(DMSO)4] (1). When treated
with diimine chelating ligands (L1 = bpy, phen, dpphen), the compounds 2–7 afforded the target [Ru(L1)2(O–O)]0/+ complex together with the undesired (and
unexpected) [Ru(L1)3]2+ species. Nevertheless,
we found that the formation of [Ru(L1)3]2+can
be minimized by carefully adjusting the reaction conditions: in particular,
high selectivity toward [Ru(L1)2(O–O)]0/+ and almost complete conversion of the precursor was obtained within
minutes, also on a 100–200 mg scale, when the reactions were
performed in absolute ethanol at 150 °C in a microwave reactor.
Depending on the nature of L1 and concentration, with the oxalate
and malonate precursors, the neutral product [Ru(L1)2(O–O)]
can precipitate spontaneously from the final mixture, in pure form
and acceptable-to-good yields. When spontaneous precipitation of the
disubstituted product does not occur, purification from [Ru(L1)3]2+ can be rather easily accomplished by column
chromatography or solvent extraction. By comparison, under the same
conditions, compound 1 is much less selective, thus demonstrating
that locking the geometry of the precursor through the introduction
of O–O in the coordination sphere of Ru is a valid strategic
approach. By virtue of its proton-sensitive nature, facile and quantitative
replacement of O–O in [Ru(L1)2(O–O)]0/+ by L2, selectively affording [Ru(L1)2(L2)]2+, was accomplished in refluxing ethanol in the presence of
a slight excess of trifluoroacetic acid or HPF6. cis-Locked Ru(II)-DMSO
complexes bearing
a symmetrical chelating anion, such as [K] fac-[RuCl(DMSO−S)3(η2-mal)] (2), are suitable
precursors for the two-step selective preparation of bis-heteroleptic
polypyridyl compounds of the type [Ru(L1)2(L2)]2+ (L1 and L2 = diimine ligands).
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Affiliation(s)
- Alessio Vidal
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Rudy Calligaro
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemistry, 75005 Paris, France
| | - Roger Alberto
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
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7
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Vidal A, Battistin F, Milani B, Balducci G, Alessio E. Stereoisomeric Control in [RuCl
2
(PTA)
2
(2L)] Complexes (2L=2py or bpy): From Theoretical Calculations to a 2+2 Metallacycle of Pyridylporphyrins. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202000996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alessio Vidal
- Department of Chemical and Pharmaceutical Sciences University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
| | - Federica Battistin
- Department of Chemical and Pharmaceutical Sciences University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
- Current address: IMDEA Nanociencia Ciudad Universitaria de Cantoblanco Faraday 9 28049 Madrid Spain
| | - Barbara Milani
- Department of Chemical and Pharmaceutical Sciences University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
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8
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Sousa LM, Araújo DMS, Oliveira KM, De Oliveira LP, Maia PIS, Deflon VM, Batista AA, Machado AEH, Guerra W, Von Poelhsitz G. Synthesis, spectroscopic characterization and computational study of Ru(II)/DMSO complexes with monocoordinated carbazate ligands. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1777286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Luana M. Sousa
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | | | - Katia M. Oliveira
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | | | - Pedro I. S. Maia
- Departamento de Química, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil
| | - Victor M. Deflon
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Alzir A. Batista
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Antônio E. H. Machado
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
- Programa de Pós-Graduação em Ciências Exatas e Tecnológicas Unidade Acadêmica Especial de Física, Universidade Federal de Catalão, Catalão, GO, Brazil
| | - Wendell Guerra
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
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Vatsa A, Padhi SK. Catalytic water oxidation by a single site [Ru(Fc-tpy)(bpy)OH2]2+ complex and it’s mechanistic study. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Toyama M, Takizawa T, Morita I, Nagao N, Kuramochi Y, Ishida H. Syntheses and Characterization of a Pair of Isomers of Heteroleptic Bis(Bidentate) Ruthenium(II) Complexes with Two Different Monodentate Ligands. Chemistry 2019; 25:16582-16590. [PMID: 31596008 DOI: 10.1002/chem.201903706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/18/2019] [Indexed: 01/24/2023]
Abstract
Two isomers of heteroleptic bis(bidentate) ruthenium(II) complexes with dimethyl sulfoxide (dmso) and chloride ligands, trans(Cl,Nbpy )- and trans(Cl,NHdpa )-[Ru(bpy)Cl(dmso-S)(Hdpa)]+ (bpy: 2,2'-bipyridine; Hdpa: di-2-pyridylamine), are synthesized. This is the first report on the selective synthesis of a pair of isomers of cis-[Ru(L)(L')XY]n+ (L≠L': bidentate ligands; X≠Y: monodentate ligands). The structures of the ruthenium(II) complexes are clarified by means of X-ray crystallography, and the signals in the 1 H NMR spectra are assigned based on 1 H-1 H COSY spectra. The colors of the two isomers are clearly different in both the solid state and solution: the trans(Cl,Nbpy ) isomer has a deep red color, whereas the trans(Cl,NHdpa ) isomer is yellow. Although both complexes have intense absorption bands at λ≈440-450 nm, only the trans(Cl,Nbpy ) isomer has a shoulder band at λ≈550 nm. DFT calculations indicate that the LUMOs of both isomers are the π* orbitals in the bpy ligand, and that the LUMO level of the trans(Cl,Nbpy ) isomer is lower than that of the trans(Cl,NHdpa ) isomer due to the trans effect of the Cl ligand; thus resulting in the appearance of the shoulder band. The HOMO levels are almost the same in both isomers. The energy levels are experimentally supported by cyclic voltammograms, in which these isomers have different reduction potentials and similar oxidation potentials.
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Affiliation(s)
- Mari Toyama
- Current address: Osaka Prefecture University College of Technology, 26-12 Saiwaicho, Neyagawa, Osaka, 572-8572, Japan.,Department of Chemistry of Functional Molecules, Faculty of Science and Engineering, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan.,Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Takako Takizawa
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Itaru Morita
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Noriharu Nagao
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Yusuke Kuramochi
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan.,Current address: Department of Chemistry, Faculty of Science Division II, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Hitoshi Ishida
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
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11
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Badiei YM, Xie Y, Renderos G, Concepcion JJ, Szalda D, Guevara J, Rosales R, Ortiz E, Hankins M. Rapid identification of homogeneous O2 evolution catalysts and comparative studies of Ru(II)-carboxamides vs. Ru(II)-carboxylates in water-oxidation. J Catal 2019. [DOI: 10.1016/j.jcat.2018.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Toyama M, Fujimoto D, Matsuoka Y, Asano Y, Nagao N. Mono(2,2′‐bipyridyl)Ru
II
Complex with Four Dimethyl Sulfoxide Ligands as Precursor for
cis
‐Bis‐heteroleptic Ru
II
Complex: Syntheses, Structures, and Substitution Reactions. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mari Toyama
- Department of Chemistry of Functional Molecules Faculty of Science and Engineering Konan University 8‐9‐1 Okamoto 658‐8501 Higashinada, Kobe Japan
| | - Daichi Fujimoto
- Department of Chemistry of Functional Molecules Faculty of Science and Engineering Konan University 8‐9‐1 Okamoto 658‐8501 Higashinada, Kobe Japan
| | - Yumi Matsuoka
- Department of Chemistry of Functional Molecules Faculty of Science and Engineering Konan University 8‐9‐1 Okamoto 658‐8501 Higashinada, Kobe Japan
| | - Yuki Asano
- Department of Chemistry of Functional Molecules Faculty of Science and Engineering Konan University 8‐9‐1 Okamoto 658‐8501 Higashinada, Kobe Japan
| | - Noriharu Nagao
- Department of Applied Chemistry School of Science and Technology Meiji University 1‐1‐1 Higashimita 214‐8571 Tama, Kawasaki Kanagawa Japan
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13
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Bratsos I, Alessio E. The Pivotal Role of Ru-dmso Compounds in the Discovery of Well-Behaved Precursors. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800469] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ioannis Bratsos
- Institute of Nanoscience and Nanotechnology (INN); Department of Physical Chemistry; NCSR “DEMOKRITOS”; Aghia Paraskevi Attikis 153 10 Athens Greece
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via L. Giorgieri 1 34127 Trieste Italy
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14
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Caraballo RM, Rosi P, Hodak JH, Baraldo LM. Photosubstitution of Monodentate Ligands from RuII-Dicarboxybipyridine Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rolando M. Caraballo
- Universidad de Buenos Aires; Facultad de Ciencias Exactas y Naturales; Departamento de Química Inorgánica; Analítica y Química Física; Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires Argentina
- CONICET - Universidad de Buenos Aires; Instituto de Química-Física de Materiales; Ambientes y Energía (INQUIMAE); Buenos Aires Argentina
| | - Pablo Rosi
- Universidad de Buenos Aires; Facultad de Ciencias Exactas y Naturales; Departamento de Química Inorgánica; Analítica y Química Física; Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires Argentina
| | - José H. Hodak
- Universidad de Buenos Aires; Facultad de Ciencias Exactas y Naturales; Departamento de Química Inorgánica; Analítica y Química Física; Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires Argentina
- CONICET - Universidad de Buenos Aires; Instituto de Química-Física de Materiales; Ambientes y Energía (INQUIMAE); Buenos Aires Argentina
| | - Luis M. Baraldo
- Universidad de Buenos Aires; Facultad de Ciencias Exactas y Naturales; Departamento de Química Inorgánica; Analítica y Química Física; Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires Argentina
- CONICET - Universidad de Buenos Aires; Instituto de Química-Física de Materiales; Ambientes y Energía (INQUIMAE); Buenos Aires Argentina
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15
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Patel J, Majee K, Raj M, Vatsa A, Rai S, Padhi SK. Effect of Quinoline Substitution on Water Oxidation by [Ru(Ql-tpy)(bpy)(OH2
)](PF6
)2. ChemistrySelect 2017. [DOI: 10.1002/slct.201700074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jully Patel
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines); Dhanbad India 826004
| | - Karunamay Majee
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines); Dhanbad India 826004
| | - Manaswini Raj
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines); Dhanbad India 826004
| | - Aditi Vatsa
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines); Dhanbad India 826004
| | - Surabhi Rai
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines); Dhanbad India 826004
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines); Dhanbad India 826004
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16
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Patel J, Majee K, Ahmad E, Vatsa A, Das B, Padhi SK. Electronic Effect on Catalytic Water Oxidation by Single Site [Ru(QCl-tpy)(bpy)(OH2)]2+Catalyst. ChemistrySelect 2017. [DOI: 10.1002/slct.201601914] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jully Patel
- Artificial Photosynthesis Lab; Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad, India, 826004
| | - Karunamay Majee
- Artificial Photosynthesis Lab; Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad, India, 826004
| | - Ejaz Ahmad
- Artificial Photosynthesis Lab; Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad, India, 826004
| | - Aditi Vatsa
- Artificial Photosynthesis Lab; Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad, India, 826004
| | - Babulal Das
- Department of Chemistry; IIT Guwahati, Assam; India 781039
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Lab; Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad, India, 826004
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17
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Nair NV, Zhou R, Thummel RP. The synthesis, photophysical properties and water oxidation studies of a series of novel photosensitizer–catalyst assemblies. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.02.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Patel J, Majee K, Ahmad E, Das B, Padhi SK. Effect of Pyridyl Substitution on Chemical and Photochemical Water Oxidation by [Ru(terpyridine)(bipyridine)(OH
2
)]
2+
Scaffolds. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601193] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jully Patel
- Artificial Photosynthesis Lab Department of Applied Chemistry Indian Institute of Technology (ISM) 826004 Dhanbad India
| | - Karunamay Majee
- Artificial Photosynthesis Lab Department of Applied Chemistry Indian Institute of Technology (ISM) 826004 Dhanbad India
| | - Ejaz Ahmad
- Artificial Photosynthesis Lab Department of Applied Chemistry Indian Institute of Technology (ISM) 826004 Dhanbad India
| | - Babulal Das
- Department of Chemistry IIT Guwahati 781039 Assam India
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Lab Department of Applied Chemistry Indian Institute of Technology (ISM) 826004 Dhanbad India
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19
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Patel J, Majee K, Padhi SK. [RuV(NCN-Me)(bpy)(O)]3+ mediated efficient photo-driven water oxidation. RSC Adv 2016. [DOI: 10.1039/c6ra12074a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The complex [Ru(NCN-Me)(bpy)H2O](PF6)2 acts as an active catalyst for the photo-driven oxidation of water, when employed with [Ru(bpy)3]2+ as photosensitizer and Na2S2O8 as sacrificial electron acceptor at pH 6.5 phosphate buffer, with a TON of 130.
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Affiliation(s)
- Jully Patel
- Artificial Photosynthesis Laboratory
- Department of Applied Chemistry
- Indian School of Mines
- Dhanbad
- India
| | - Karunamay Majee
- Artificial Photosynthesis Laboratory
- Department of Applied Chemistry
- Indian School of Mines
- Dhanbad
- India
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Laboratory
- Department of Applied Chemistry
- Indian School of Mines
- Dhanbad
- India
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20
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TOYAMA M, IWATSUKI S, NAGAO N. Crystal Structure of <i>Trans</i>(Cl),<i>cis</i>(S)-dichlorobis(dimethyl sulfoxide-<i>S</i>)(<i>N,N,N</i>′,<i>N</i>′-tetramethylethylenediamine)ruthenium(II). X-RAY STRUCTURE ANALYSIS ONLINE 2016. [DOI: 10.2116/xraystruct.32.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mari TOYAMA
- Department of Chemistry of Functional Molecules, Faculty of Science and Engineering, Konan University
| | - Satoshi IWATSUKI
- Department of Chemistry of Functional Molecules, Faculty of Science and Engineering, Konan University
| | - Noriharu NAGAO
- Department of Applied Chemistry, School of Science and Technology, Meiji University
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21
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Patel J, Majee K, Ahma Combining Dot Below D E, Tanaka K, Padhi SK. [Ru(V)(NCN-Me)(bpy)([double bond, length as m-dash]O)](3+) Mediates efficient C-H bond oxidation from NADH analogs in aqueous media rather than water oxidation. Dalton Trans 2015; 44:920-3. [PMID: 25479040 DOI: 10.1039/c4dt02827a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Ru(V)[double bond, length as m-dash]O](3+) and [Ru(VI)[double bond, length as m-dash]O](4+) generated from [Ru(II)(NCN-Me)(bpy)(H2O)](PF6)2 (where NCN-Me is the neutral N-methyl-3,5-di(2-pyridyl)pyridinium iodide after deprotonation of the C-H bond) play a selective role in the C-H bond oxidation of 2-(pyridin-2-yl)-9,10-dihydroacridine (PADHH) and water oxidation, respectively.
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Affiliation(s)
- Jully Patel
- Department of Applied Chemistry, Indian School of Mines, Dhanbad, 826004, India.
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22
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Battistin F, Balducci G, Demitri N, Iengo E, Milani B, Alessio E. (15)N NMR spectroscopy unambiguously establishes the coordination mode of the diimine linker 2-(2'-pyridyl)pyrimidine-4-carboxylic acid (cppH) in Ru(ii) complexes. Dalton Trans 2015; 44:15671-82. [PMID: 26251967 DOI: 10.1039/c5dt02361k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the reactivity of three Ru(ii) precursors -trans,cis,cis-[RuCl2(CO)2(dmso-O)2], cis,fac-[RuCl2(dmso-O)(dmso-S)3], and trans-[RuCl2(dmso-S)4] - towards the diimine linker 2-(2'-pyridyl)pyrimidine-4-carboxylic acid (cppH) or its parent compound 4-methyl-2-(2'-pyridyl)pyrimidine ligand (mpp), in which a methyl group replaces the carboxylic group on the pyrimidine ring. In principle, both cppH and mpp can originate linkage isomers, depending on how the pyrimidine ring binds to ruthenium through the nitrogen atom ortho (N(o)) or para (N(p)) to the group in position 4. The principal aim of this work was to establish a spectroscopic fingerprint for distinguishing the coordination mode of cppH/mpp also in the absence of an X-ray structural characterization. By virtue of the new complexes described here, together with the others previously reported by us, we successfully recorded {(1)H,(15)N}-HMBC NMR spectra at natural abundance of the (15)N isotope on a consistent number of fully characterized Ru(ii)-cppH/mpp compounds, most of them being stereoisomers and/or linkage isomers. Thus, we found that (15)N NMR chemical shifts unambiguously establish the binding mode of cppH and mpp - either through N(o) or N(p)- and can be conveniently applied also in the absence of the X-ray structure. In fact, coordination of cppH to Ru(ii) induces a marked upfield shift for the resonance of the N atoms directly bound to the metal, with coordination induced shifts (CIS) ranging from ca.-45 to -75 ppm, depending on the complex, whereas the unbound N atom resonates at a frequency similar to that of the free ligand. Similar results were found for the complexes of mpp. This work confirmed our previous finding that cppH has no binding preference, whereas mpp binds exclusively through N(p). Interestingly, the two cppH linkage isomers trans,cis-[RuCl2(CO)2(cppH-κN(p))] (5) and trans,cis-[RuCl2(CO)2(cppH-κN(o))] (6) were easily obtained in pure form by exploiting their different solubility properties.
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Affiliation(s)
- Federica Battistin
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy.
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23
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Weisser F, Plebst S, Hohloch S, van der Meer M, Manck S, Führer F, Radtke V, Leichnitz D, Sarkar B. Tuning Ligand Effects and Probing the Inner-Workings of Bond Activation Steps: Generation of Ruthenium Complexes with Tailor-Made Properties. Inorg Chem 2015; 54:4621-35. [DOI: 10.1021/ic502807d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Fritz Weisser
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Sebastian Plebst
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Stephan Hohloch
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Margarethe van der Meer
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Sinja Manck
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Felix Führer
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Vanessa Radtke
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Daniel Leichnitz
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Biprajit Sarkar
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
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24
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White JK, Brewer KJ. A new Ru,Ru,Pt supramolecular architecture for photocatalytic H2 production. Chem Commun (Camb) 2015; 51:16123-6. [DOI: 10.1039/c5cc06463e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New RuRuPt complexes photocatalytically reduce H2O to H2 with enhanced efficiency and stability compared to Ru2RuPt analogues.
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25
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Albani BA, Peña B, Leed NA, de Paula NABG, Pavani C, Baptista MS, Dunbar KR, Turro C. Marked improvement in photoinduced cell death by a new tris-heteroleptic complex with dual action: singlet oxygen sensitization and ligand dissociation. J Am Chem Soc 2014; 136:17095-101. [PMID: 25393595 DOI: 10.1021/ja508272h] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The new tris-heteroleptic complex [Ru(bpy)(dppn)(CH3CN)2](2+) (3, bpy = 2,2'-bipyridine, dppn = benzo[i]dipyrido[3,2-a;2',3'-c]phenazine) was synthesized and characterized in an effort to generate a molecule capable of both singlet oxygen ((1)O2) production and ligand exchange upon irradiation. Such dual reactivity has the potential to be useful for increasing the efficacy of photochemotherapy drugs by acting via two different mechanisms simultaneously. The photochemical properties and photoinduced cytotoxicity of 3 were compared to those of [Ru(bpy)2(dppn)](2+) (1) and [Ru(bpy)2(CH3CN)2](2+) (2), since 1 sensitizes the production of (1)O2 and 2 undergoes ligand exchange of the monodentate CH3CN ligands with solvent when irradiated. The quantum yield of (1)O2 production was measured to be 0.72(2) for 3 in methanol, which is slightly lower than that of 1, Φ = 0.88(2), in the same solvent (λirr = 460 nm). Complex 3 also undergoes photoinduced ligand exchange when irradiated in H2O (λirr = 400 nm), but with a low quantum efficiency (<1%). These results are explained by the presence of the low-lying ligand-centered (3)ππ* excited state of 3 localized on the dppn ligand, thus decreasing the relative population of the higher energy (3)dd state; the latter is associated with ligand dissociation. Cytotoxicity data with HeLa cells reveal that complex 3 exhibits a greater photocytotoxicity index, 1110, than does either 1 and 2, indicating that the dual-action complex is more photoactive toward cells in spite of its low ligand exchange quantum yield.
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Affiliation(s)
- Bryan A Albani
- Department of Chemistry and Biochemistry, The Ohio State University , Columbus, Ohio 43210, United States
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26
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Albani BA, Durr CB, Peña B, Dunbar KR, Turro C. Isomerization initiated by photoinduced ligand dissociation in Ru(ii) complexes with the ligand 2-p-tolylpyridinecarboxaldimine. Dalton Trans 2014; 43:17828-37. [DOI: 10.1039/c4dt02016b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Al-Noaimi M, Nafady A, Warad I, Alshwafy R, Husein A, Talib WH, Hadda TB. Heterotrimetallic Ru(II)/Pd(II)/Ru(II) complexes: synthesis, crystalstructure, spectral characterization, DFT calculation and antimicrobial study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:273-282. [PMID: 24316542 DOI: 10.1016/j.saa.2013.11.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 10/19/2013] [Accepted: 11/10/2013] [Indexed: 06/02/2023]
Abstract
New ruthenium(II) mononuclear complexes of the type [RuCl2(PPh3)2(η(2)-triamine)] (2) [RuCl(PPh3)2(η(3)-triamine)]Cl (5) (triemine=N(1)-(2-aminoethyl)-1,2-ethanediamine) have been synthesized by reacting [RuCl2(PPh3)3] (1) with one mole equivalent of N(1)-(2-aminoethyl)-1,2-ethanediamine in dichloromethane. Reaction of (2) with half-equivalent of (PhCN)2PdCl2 or Pd(OAc)2 in dichloromethane as a solvent afforded two novel heterotrimetallic Ru(II)-Pd(II)-Ru(II) complexes, [Ru(II)Cl2(PPh3)2(triamine)]2[Pd(II)X2](X=Cl, OAc) (3 and 4), bearing bioactive ligand. The progress of the undertaken reactions was monitored by (31)P{1H} NMR and FTIR. Crystal structure of complex 2 was confirmed by X-ray diffraction. The absorption spectrum of 2 in dichloromethane was modeled by time-dependent density functional theory (TD-DFT). The in vitro antimicrobial studies of complex 2-5 against an array of microorganisms (bacteria and fungi) were conducted. Complexes 3 and 4 exhibit high dual antibacterial and antifungal activity inhibiting microorganisms possibly via hydrolytic pathway which further evidenced by electrochemical analyses. The complexes 3 and 4 show a high inhibitory activity at 200 μg/ml concentration, suggesting that complexes 3 and 4 are two efficient catalytic inhibitor of microorganisms and further, they should be tested against cancer strains.
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Affiliation(s)
- Mousa Al-Noaimi
- Department of Chemistry, Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
| | - Ayman Nafady
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Ismail Warad
- Department of Chemistry, AN-Najah National University, Nablus, Occupied Palestinian Territory.
| | - Rwaida Alshwafy
- Department of Chemistry, College of Science, Taiz University, P.O. Box 6803, Republic of Yemen
| | - Ahmad Husein
- Department of Chemistry, AN-Najah National University, Nablus, Occupied Palestinian Territory
| | - Wamidh H Talib
- Department of Clinical Pharmacy and Therapeutics, Applied Science University, Amman 11931, Jordan
| | - Taibi Ben Hadda
- Laboratoire LCM, Faculty of Sciences, University Mohammed 1[er], Oujda 60000, Morocco
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28
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Metal-drug synergy: new ruthenium(II) complexes of ketoconazole are highly active against Leishmania major and Trypanosoma cruzi and nontoxic to human or murine normal cells. J Biol Inorg Chem 2013; 18:779-90. [PMID: 23881220 DOI: 10.1007/s00775-013-1024-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 07/05/2013] [Indexed: 10/26/2022]
Abstract
In our ongoing search for new metal-based chemotherapeutic agents against leishmaniasis and Chagas disease, six new ruthenium-ketoconazole (KTZ) complexes have been synthesized and characterized, including two octahedral coordination complexes-cis,fac-[Ru(II)Cl2(DMSO)3(KTZ)] (1) and cis-[Ru(II)Cl2(bipy)(DMSO)(KTZ)] (2) (where DMSO is dimethyl sulfoxide and bipy is 2,2'-bipyridine)-and four organometallic compounds-[Ru(II)(η(6)-p-cymene)Cl2(KTZ)] (3), [Ru(II)(η(6)-p-cymene)(en)(KTZ)][BF4]2 (4), [Ru(II)(η(6)-p-cymene)(bipy)(KTZ)][BF4]2 (5), and [Ru(II)(η(6)-p-cymene)(acac)(KTZ)][BF4] (6) (where en is ethylenediamine and acac is acetylacetonate); the crystal structure of 3 is described. The central hypothesis of our work is that combining a bioactive compound such as KTZ and a metal in a single molecule results in a synergy that can translate into improved activity and/or selectivity against parasites. In agreement with this hypothesis, complexation of KTZ with Ru(II) in compounds 3-5 produces a marked enhancement of the activity toward promastigotes and intracellular amastigotes of Leishmania major, when compared with uncomplexed KTZ, or with similar ruthenium compounds not containing KTZ. Importantly, the selective toxicity of compounds 3-5 toward the leishmania parasites, in relation to human fibroblasts and osteoblasts or murine macrophages, is also superior to the selective toxicities of the individual constituents of the drug. When tested against Trypanosoma cruzi epimastigotes, some of the organometallic complexes displayed activity and selectivity comparable to those of free KTZ. A dual-target mechanism is suggested to account for the antiparasitic properties of these complexes.
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29
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Tong L, Inge AK, Duan L, Wang L, Zou X, Sun L. Catalytic water oxidation by mononuclear Ru complexes with an anionic ancillary ligand. Inorg Chem 2013; 52:2505-18. [PMID: 23409776 DOI: 10.1021/ic302446h] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mononuclear Ru-based water oxidation catalysts containing anionic ancillary ligands have shown promising catalytic efficiency and intriguing properties. However, their insolubility in water restricts a detailed mechanism investigation. In order to overcome this disadvantage, complexes [Ru(II)(bpc)(bpy)OH2](+) (1(+), bpc = 2,2'-bipyridine-6-carboxylate, bpy = 2,2'-bipyridine) and [Ru(II)(bpc)(pic)3](+) (2(+), pic = 4-picoline) were prepared and fully characterized, which features an anionic tridentate ligand and has enough solubility for spectroscopic study in water. Using Ce(IV) as an electron acceptor, both complexes are able to catalyze O2-evolving reaction with an impressive rate constant. On the basis of the electrochemical and kinetic studies, a water nucleophilic attack pathway was proposed as the dominant catalytic cycle of the catalytic water oxidation by 1(+), within which several intermediates were detected by MS. Meanwhile, an auxiliary pathway that is related to the concentration of Ce(IV) was also revealed. The effect of anionic ligand regarding catalytic water oxidation was discussed explicitly in comparison with previously reported mononuclear Ru catalysts carrying neutral tridentate ligands, for example, 2,2':6',2″-terpyridine (tpy). When 2(+) was oxidized to the trivalent state, one of its picoline ligands dissociated from the Ru center. The rate constant of picoline dissociation was evaluated from time-resolved UV-vis spectra.
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Affiliation(s)
- Lianpeng Tong
- Department of Chemistry, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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30
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Chen W, Rein FN, Scott BL, Rocha RC. Catalytic Photooxidation of Alcohols by an Unsymmetrical Tetra(pyridyl)pyrazine-Bridged Dinuclear Ru Complex. Chemistry 2011; 17:5595-604. [PMID: 21452180 DOI: 10.1002/chem.201002168] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 12/06/2010] [Indexed: 11/05/2022]
Affiliation(s)
- Weizhong Chen
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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Toyama M, Iwamatsu S, Inoue KI, Nagao N. Crystal Structures and Substitution Reactions oftrans(O,S)-[Ru(bpy)Cl(dmso-S)2(OH2)]+and Three Derivative Complexes,trans(L,S)-[Ru(bpy)Cl(dmso-S)2(L)]+(bpy: 2,2′-Bipyridine, dmso: Dimethyl Sulfoxide, L = dmso-O, MeOH, or MeCN). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100224] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Synthetic, spectral and structural study of mono bis(pyridine)dichloro bis(dimethyl sulfoxide-S) ruthenium(II) complex, [RuCl2(py)2(dmso-S)2] and its reactivity with nitrogen donor bases in polar and non-polar solvent. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.04.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Shimizu Y, Fukui S, Oi T, Nagao H. Synthesis and Characterization of Ruthenium Complexes Having TridentateN-Ethyl-N,N-bis(2-pyridylmethyl)amine Coordinating in a Facial or Meridional Fashion. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1285] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lazarides T, Adams H, Sykes D, Faulkner S, Calogero G, Ward MD. Heteronuclear bipyrimidine-bridged Ru–Ln and Os–Ln dyads: low-energy3MLCT states as energy-donors to Yb(iii) and Nd(iii). Dalton Trans 2008:691-8. [DOI: 10.1039/b714640j] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Toyama M, Nakahara M, Nagao N. Syntheses, Crystal Structures, and Conversion of Three Linkage Isomers of Di-2-pyridyl Ketone in Dichlorobis(dimethyl sulfoxide-S)ruthenium(II) and Chlorobis(dimethyl sulfoxide-S)ruthenium(II) Complexes: [RuCl2(dpk-κ2N,O)(dmso-S)2], [RuCl2(dpk-κ2N,N′)(dmso-S)2], and [RuCl(dpk-OH-κ3N,O,N′)(dmso-S)2]. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.937] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Toyama M, Suganoya R, Tsuduura D, Nagao N. Syntheses and Crystal Structures of Mono(di-2-pyridylamine)chloro(dimethyl sulfoxide-S)ruthenium(II) Complexes [RuCl2(Hdpa)(dmso-S)2] and [RuCl(Hdpa)(dmso-O)(dmso-S)2](OTf). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.922] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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