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Reigosa-Chamorro F, Cordeiro S, Pereira MT, Filipe B, Baptista PV, Fernandes AR, Vila JM. Effect of mono- and dinuclear thiosemicarbazone platinacycles in the proliferation of a colorectal carcinoma cell line. Dalton Trans 2024. [PMID: 39233530 DOI: 10.1039/d4dt01490a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
Herein, we describe the synthesis and characterization of a series of thiosemicarbazone platinacycles. Their activity towards HCT116 and A2780 cancer cell lines as well as normal fibroblasts was explored and conclusions about the influence of their structures were drawn based on the results. Ligands L1-3, tetranuclear compounds [Pt(L1-3)]4, [Pt(L1-3)(PPh3)], and [Pt(L1-L3)2{Ph2P(CH2)4PPh2}], and phosphine derivatives, were deemed unpromising owing to their lack of activity. However, mono-coordinated diphosphine complexes [Pt(L1-L3)(Ph2PCH2PPh2-P)] showed high selectivity and low IC50 values, and their antiproliferative activity was further studied. The three studied derivatives 3a, 3b and 3c showed a fast internalization of HCT116 colorectal cancer cells with similar IC50 values, which induced a depolarization of mitochondrial membrane potential, with the subsequent triggering of apoptosis and autophagy in the case of 3c. In the case of compounds 3a and 3b, cell death mechanisms (extrinsic and intrinsic apoptosis, respectively) were triggered via the induction of reactive oxygen species (ROS). The three compounds were not toxic to a chicken embryo in vivo (after 48 h), and, importantly, showed an anti-angiogenic potential after exposure to the IC50 of compounds 3a, 3b and 3c.
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Affiliation(s)
- Francisco Reigosa-Chamorro
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain.
| | - Sandra Cordeiro
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, 2819-516 Caparica, Portugal.
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal
| | - M Teresa Pereira
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain.
| | - Beatriz Filipe
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, 2819-516 Caparica, Portugal.
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal
| | - Pedro V Baptista
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, 2819-516 Caparica, Portugal.
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal
| | - Alexandra R Fernandes
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, 2819-516 Caparica, Portugal.
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal
| | - José M Vila
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain.
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2
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Moree LK, Faulkner LAV, Crowley JD. Heterometallic cages: synthesis and applications. Chem Soc Rev 2024; 53:25-46. [PMID: 38037385 DOI: 10.1039/d3cs00690e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
High symmetry metallosupramolecular architectures (MSAs) have been exploited for a range of applications including molecular recognition, catalysis and drug delivery. Recently there have been increasing efforts to enhance those applications by generating reduced symmetry MSAs. While there are several emerging methods for generating lower symmetry MSAs, this tutorial review examines the general methods used for synthesizing heterometallic MSAs with a particular focus on heterometallic cages. Additionally, the intrinsic properties of the cages and their potential emerging applications as host-guest systems and reaction catalysts are described.
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Affiliation(s)
- Lana K Moree
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | - Logan A V Faulkner
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | - James D Crowley
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
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3
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Orton GRF, Pilgrim BS, Champness NR. The chemistry of phosphines in constrained, well-defined microenvironments. Chem Soc Rev 2021; 50:4411-4431. [PMID: 33606857 DOI: 10.1039/d0cs01556c] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Developments in the confinement of phosphines within micro- or nano-environments are explored. Phosphines are ubiquitous across metal coordination chemistry and underpin some of the most famous homogeneous transition metal catalysts. Constraining phosphines within confined environments influences not only their behaviour but also that of their metal complexes. Notable examples include the use of metal-organic frameworks (MOFs) or metal-organic cages (MOCs) to support phosphines which demonstrate how the microenvironment within such constructs leads to reactivity modification. The development of phosphine confinement is explored and parallels are drawn with related constrained macrocyclic systems and mechanically interlocked molecules. The review concludes by identifying areas that remain a challenge and those that will provide new avenues for research.
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Affiliation(s)
- Georgia R F Orton
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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Cheng HF, Paul MK, d'Aquino AI, Stern CL, Mirkin CA. Multi-State Dynamic Coordination Complexes Interconverted through Counterion-Controlled Phase Transfer. Inorg Chem 2021; 60:4755-4763. [PMID: 33719417 DOI: 10.1021/acs.inorgchem.0c03708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We studied a series of dynamic weak-link approach (WLA) complexes that can be shuttled between two immiscible solvents and switched between two structural states via ion exchange. Here, we established that hydrophobic anions transfer cationic, amphiphilic complexes from the aqueous phase to the organic phase, while a chloride source reverses the process. As a result of the dynamic metal coordination properties of WLA complexes, the denticity of these complexes (mono- to bi-) can be modulated as they partition into different phases. In addition, we discovered that heteroligated complexes bearing ligands of different donor strengths preferentially rearrange into two homoligated complexes that are phase-partitioned to maximize the number of stronger coordination bonds. This behavior is not observed in systems with one solvent, highlighting the dynamic and stimuli-responsive nature of hemilabile ligands in a multiphasic solvent environment. Taken together, this work shows that the highly reconfigurable WLA modality can enable the design of biphasic reaction networks or chemical separations driven by straightforward salt metathesis reactions.
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Affiliation(s)
- Ho Fung Cheng
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - McKinley K Paul
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Andrea I d'Aquino
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Charlotte L Stern
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Chad A Mirkin
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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5
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Bruekers JPJ, Hellinghuizen MA, Vanthuyne N, Tinnemans P, Gilissen PJ, Buma WJ, Naubron J, Crassous J, Elemans JAAW, Nolte RJM. Allosteric Guest Binding in Chiral Zirconium(IV) Double Decker Porphyrin Cages. European J Org Chem 2021; 2021:607-617. [PMID: 33679232 PMCID: PMC7898692 DOI: 10.1002/ejoc.202001392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/03/2020] [Indexed: 12/11/2022]
Abstract
Chiral zirconium(IV) double cage sandwich complex Zr(1)2 has been synthesized in one step from porphyrin cage H21. Zr(1)2 was obtained as a racemate, which was resolved by HPLC and the enantiomers were isolated in >99.5 % ee. Their absolute configurations were assigned on the basis of X-ray crystallography and circular dichroism spectroscopy. Vibrational circular dichroism (VCD) experiments on the enantiomers of Zr(1)2 revealed that the chirality around the zirconium center is propagated throughout the whole cage structure. The axial conformational chirality of the double cage complex displayed a VCD fingerprint similar to the one observed previously for a related chiral cage compound with planar and point chirality. Zr(1)2 shows fluorescence, which is quenched when viologen guests bind in its cavities. The binding of viologen and dihydroxybenzene derivatives in the two cavities of Zr(1)2 occurs with negative allostery, the cooperativity factors α (=4 K2/K1) being as low as 0.0076 for the binding of N,N'-dimethylviologen. These allosteric effects are attributed to a pinching of the second cavity as a result of guest binding in the first cavity.
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Affiliation(s)
- Jeroen P. J. Bruekers
- Radboud UniversityInstitute for Molecules and MaterialsHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | - Matthijs A. Hellinghuizen
- Radboud UniversityInstitute for Molecules and MaterialsHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | | | - Paul Tinnemans
- Radboud UniversityInstitute for Molecules and MaterialsHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | - Pieter J. Gilissen
- Radboud UniversityInstitute for Molecules and MaterialsHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | - Wybren Jan Buma
- University of AmsterdamVan ‘t Hoff Institute for Molecular SciencesScience Park 9041098XHAmsterdamThe Netherlands
- Radboud UniversityInstitute for Molecules and MaterialsFELIX LaboratoryToernooiveld 7c6525EDNijmegenThe Netherlands
| | | | - Jeanne Crassous
- Univ RennesCNRSInstitut des Sciences Chimiques de RennesISCR-UMR 622635000RennesFrance
| | - Johannes A. A. W. Elemans
- Radboud UniversityInstitute for Molecules and MaterialsHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | - Roeland J. M. Nolte
- Radboud UniversityInstitute for Molecules and MaterialsHeyendaalseweg 1356525AJNijmegenThe Netherlands
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Abstract
Abiotic allosterism is most commonly observed in hetero-bimetallic supramolecular complexes and less frequently in homo-bimetallic complexes. The use of hemilabile ligands with high synthetic complexity enables the catalytic center by the addition or removal of allosteric effectors and simplicity is unusually seen in these systems. Here we describe a simpler approach to achieve kinetic regulation by the use of dimeric Schiff base copper complexes connected by a chlorido ligand bridge. The chlorido ligand acts as a weak link between monomers, generating homo-bimetallic self-aggregating supramolecular complexes that generate monomeric species in different reaction rates depending on the solvent and on the radical moiety of the ligand. The ligand exchange was observed by electron paramagnetic resonance (EPR) and conductivity measurements, indicating that complexes with ligands bearing methoxyl (CuIIL2) and ethoxyl (CuIIL5) radicals were more prone to form dimeric complexes in comparison to ligands bearing hydrogen (CuIIL1), methyl (CuIIL3), or t-butyl (CuIIL4) radicals. The equilibrium between dimer and monomer afforded different reactivities of the complexes in acetonitrile/water and methanol/water mixtures toward urea hydrolysis as a model reaction. It was evident that the dimeric species were inactive and that by increasing the water concentration in the reaction medium, the dimeric structures dissociated to form the active monomeric structures. This behavior was more pronounced when methanol/water mixtures were employed due to a slower displacement of the chlorido bridge in this medium than in the acetonitrile/water mixtures, enabling the reaction kinetics to be evaluated. This effect was attributed to the preferential solvation shell by the organic solvents and in essence, an upregulation behavior was observed due to the intrinsic nature of the complexes to form dimeric structures in solution that could be dismantled in the presence of water, indicating their possible use as water-sensors in organic solvents.
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Solà J, Jimeno C, Alfonso I. Exploiting complexity to implement function in chemical systems. Chem Commun (Camb) 2020; 56:13273-13286. [DOI: 10.1039/d0cc04170j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This feature article reflects a personal overview of the importance of complexity as an additional parameter to be considered in chemical research, being illustrated with selected examples in molecular recognition and catalysis.
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Affiliation(s)
- Jordi Solà
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
| | - Ciril Jimeno
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
| | - Ignacio Alfonso
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
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Endo K, Ube H, Shionoya M. Multi-Stimuli-Responsive Interconversion between Bowl- and Capsule-Shaped Self-Assembled Zinc(II) Complexes. J Am Chem Soc 2019; 142:407-416. [DOI: 10.1021/jacs.9b11099] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kenichi Endo
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hitoshi Ube
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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9
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Smith JB, Camp AM, Farquhar AH, Kerr SH, Chen CH, Miller AJM. Organometallic Elaboration as a Strategy for Tuning the Supramolecular Characteristics of Aza-Crown Ethers. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jacob B. Smith
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Andrew M. Camp
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Alexandra H. Farquhar
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Stewart H. Kerr
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Chun-Hsing Chen
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Alexander J. M. Miller
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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10
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Pankhurst JR, Paul S, Zhu Y, Williams CK, Love JB. Polynuclear alkoxy-zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO 2. Dalton Trans 2019; 48:4887-4893. [PMID: 30896006 DOI: 10.1039/c9dt00595a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The reactions between alcohols and the tetranuclear ethyl-Zn complexes of an ortho-phenylene-bridged polypyrrole macrocycle, Zn4Et4(L1) 1 and the related anthracenyl-bridged macrocyclic complex, Zn4Et4(THF)4(L2) 2 have been studied. With long-chain alcohols such as n-hexanol, the clean formation of the tetranuclear hexoxide complex Zn4(OC6H13)4(L1) 3 occurs. In contrast, the use of shorter-chain alcohols such as i-propanol results in the trinuclear complex Zn3(μ2-OiPr)2(μ3-OiPr)(HL1) 4 that arises from demetalation; this complex was characterised by X-ray crystallography. The clean formation of these polynuclear zinc clusters allowed a study of their use as catalysts in the ring-opening copolymerisation (ROCOP) reaction between cyclohexene oxide and CO2. In situ reactions involving the pre-catalyst 1 and n-hexanol formed the desired polymer with the best selectivity for polycarbonate (90%) at 30 atm CO2, whilst the activity and performance of pre-catalyst 2 was poor in comparison.
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Affiliation(s)
- James R Pankhurst
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK.
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11
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Teng Q, Huynh HV. (Hetero)bimetallic and Tetranuclear Complexes of Pincer-Bridged N-Heterocyclic Carbene Ligands. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00664] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qiaoqiao Teng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore
| | - Han Vinh Huynh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore
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12
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Cheng HF, d'Aquino AI, Barroso-Flores J, Mirkin CA. A Redox-Switchable, Allosteric Coordination Complex. J Am Chem Soc 2018; 140:14590-14594. [PMID: 30365302 DOI: 10.1021/jacs.8b09321] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A redox-regulated molecular tweezer complex was synthesized via the weak-link approach. The PtII complex features a redox-switchable hemilabile ligand (RHL) functionalized with a ferrocenyl moiety, whose oxidation state modulates the opening of a specific coordination site. Allosteric regulation by redox agents gives reversible access to two distinct structural states-a fully closed state and a semi-open state-whose interconversion was studied via multinuclear NMR spectroscopy, cyclic voltammetry, and UV-vis-NIR spectroscopy. Two structures in this four-state system were further characterized via SCXRD, while the others were modeled through DFT calculations. This fully reversible, RHL-based system defines an unusual level of electrochemical control over the occupancy of a specific coordination site, thereby providing access to four distinct coordination states within a single system, each defined and differentiated by structure and oxidation state.
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Affiliation(s)
- Ho Fung Cheng
- Department of Chemistry and International Institute for Nanotechnology , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States
| | - Andrea I d'Aquino
- Department of Chemistry and International Institute for Nanotechnology , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States
| | - Joaquín Barroso-Flores
- Centro Conjunto de Investigación en Química Sustentable, UAEM-UNAM , Carretera Toluca-Atlacomulco Km 14.5 , Personal de la UNAM, Unidad San Cayetano, Toluca , Estado de México C.P. 50200 , Mexico
| | - Chad A Mirkin
- Department of Chemistry and International Institute for Nanotechnology , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States
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13
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Hooley RJ. Rings and Things: The Magic of Building Self-Assembled Cages and Macrocycles. Inorg Chem 2018; 57:3497-3499. [DOI: 10.1021/acs.inorgchem.8b00553] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Richard J. Hooley
- Department of Chemistry, University of California—Riverside, Riverside, California 92521, United States
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Ulm F, Poblador-Bahamonde AI, Choppin S, Bellemin-Laponnaz S, Chetcuti MJ, Achard T, Ritleng V. Synthesis, characterization, and catalytic application in aldehyde hydrosilylation of half-sandwich nickel complexes bearing (κ1-C)- and hemilabile (κ2-C,S)-thioether-functionalised NHC ligands. Dalton Trans 2018; 47:17134-17145. [DOI: 10.1039/c8dt03882a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Ni complexes bearing thioether-functionalised NHCs; hemilabile ligands for catalytic aldehyde hydrosilylation.
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Affiliation(s)
- Franck Ulm
- Université de Strasbourg
- Université de Haute-Alsace
- CNRS
- LIMA
- UMR 7042
| | | | - Sabine Choppin
- Université de Strasbourg
- Université de Haute-Alsace
- CNRS
- LIMA
- UMR 7042
| | - Stéphane Bellemin-Laponnaz
- Institut de Physique et Chimie des Matériaux de Strasbourg
- CNRS
- Université de Strasbourg
- UMR 7504
- 67000 Strasbourg
| | | | - Thierry Achard
- Institut de Physique et Chimie des Matériaux de Strasbourg
- CNRS
- Université de Strasbourg
- UMR 7504
- 67000 Strasbourg
| | - Vincent Ritleng
- Université de Strasbourg
- Université de Haute-Alsace
- CNRS
- LIMA
- UMR 7042
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