1
|
Zhang J, Li Y, Fang R, Wei W, Wang Y, Jin J, Yang F, Chen J. Organometallic gold(I) and gold(III) complexes for lung cancer treatment. Front Pharmacol 2022; 13:979951. [PMID: 36176441 PMCID: PMC9513137 DOI: 10.3389/fphar.2022.979951] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
Metal compounds, especially gold complexes, have recently gained increasing attention as possible lung cancer therapeutics. Some gold complexes display not only excellent activity in cisplatin-sensitive lung cancer but also in cisplatin-resistant lung cancer, revealing promising prospects in the development of novel treatments for lung cancer. This review summarizes examples of anticancer gold(I) and gold (III) complexes for lung cancer treatment, including mechanisms of action and approaches adopted to improve their efficiency. Several excellent examples of gold complexes against lung cancer are highlighted.
Collapse
Affiliation(s)
- Juzheng Zhang
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
| | - Yanping Li
- School of Public Health, Guilin Medical University, Guilin, China
| | - Ronghao Fang
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
| | - Wei Wei
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
| | - Yong Wang
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
| | - Jiamin Jin
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
| | - Feng Yang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, China
- *Correspondence: Feng Yang, mailto:, Jian Chen, mailto:
| | - Jian Chen
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
- *Correspondence: Feng Yang, mailto:, Jian Chen, mailto:
| |
Collapse
|
2
|
Hussaini SY, Haque RA, Haziz UF, Amirul A, Razali M. Dinuclear silver(I)- and gold(I)-N-heterocyclic carbene complexes of N-alkyl substituted bis-benzimidazol-2-ylidenes with aliphatic spacer: Synthesis, characterizations and antibacterial studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131187] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
3
|
Nishad RC, Rit A. Self-Assembly of Benzimidazole-Derived Tris-NHC Ligands and Ag I -Ions to Hexanuclear Organometallic Cages and Their Unusual Transmetalation Chemistry. Chemistry 2021; 27:594-599. [PMID: 33090631 DOI: 10.1002/chem.202003937] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/30/2020] [Indexed: 01/08/2023]
Abstract
Multi-ligand self-assembly to attain the AgI -N-heterocyclic carbene (NHC)-built hexanuclear organometallic cages of composition [Ag6 (3 a,b)4 ](PF6 )6 from the reaction of benzimidazole-derived tris(azolium) salts [H3 -3 a,b](PF6 )3 with Ag2 O was achieved. The molecular structures of the cages were established by X-ray diffraction studies along with NMR and MS analyses. The existence of a single assembly in solution was supported by diffusion-ordered spectroscopy (DOSY) 1 H NMR spectra. Further, transmetalation reactions of these self-assembled complexes, [Ag6 (3 a,b)4 ](PF6 )6 , with CuI /AuI -ions provided various coinage metal-NHC complexes having diverse molecular compositions, which included the first example of a hexanuclear CuI -dodecacarbene complex, [Cu6 (3 b)4 ](PF6 )6 .
Collapse
Affiliation(s)
- Rajeev C Nishad
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Arnab Rit
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| |
Collapse
|
4
|
Jakob CHG, Dominelli B, Schlagintweit JF, Fischer PJ, Schuderer F, Reich RM, Marques F, Correia JDG, Kühn FE. Improved Antiproliferative Activity and Fluorescence of a Dinuclear Gold(I) Bisimidazolylidene Complex via Anthracene-Modification. Chem Asian J 2020; 15:4275-4279. [PMID: 33405335 PMCID: PMC7756789 DOI: 10.1002/asia.202001104] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/12/2020] [Indexed: 12/26/2022]
Abstract
A straightforward modification route to obtain mono- and di-substituted anthroyl ester bridge functionalized dinuclear Au(I) bis-N-heterocyclic carbene complexes is presented. The functionalization can be achieved starting from a hydroxyl-functionalized ligand precursor followed by transmetallation of the corresponding Ag complex or via esterification of the hydroxyl-functionalized gold complex. The compounds are characterized by NMR-spectroscopy, ESI-MS, elemental analysis and SC-XRD. The mono-ester Au complex shows quantum yields around 18%. In contrast, the corresponding syn-di-ester Au complex, exhibits significantly lower quantum yields of around 8%. Due to insufficient water solubility of the di-ester, only the mono-ester complex has been tested regarding its antiproliferative activity against HeLa- (cervix) and MCF-7- (breast) cancer cell lines and a healthy fibroblast cell line (V79). IC50 values of 7.26 μM in the HeLa cell line and 7.92 μM in the MCF-7 cell line along with selectivity indices of 8.8 (HeLa) and 8.0 (MCF-7) are obtained. These selectivity indices are significantly higher than those obtained for the reference drugs cisplatin or auranofin.
Collapse
Affiliation(s)
- Christian H. G. Jakob
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Bruno Dominelli
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Jonas F. Schlagintweit
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Pauline J. Fischer
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Franziska Schuderer
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Robert M. Reich
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares and Departamento de Engenharia e Ciências Nucleares, Instituto Superior TécnicoUniversidade de LisboaCampus Tecnológico e Nuclear, Estrada Nacional N° 10 (km 139,7)2695-066Bobadela LRSPortugal
| | - João D. G. Correia
- Centro de Ciências e Tecnologias Nucleares and Departamento de Engenharia e Ciências Nucleares, Instituto Superior TécnicoUniversidade de LisboaCampus Tecnológico e Nuclear, Estrada Nacional N° 10 (km 139,7)2695-066Bobadela LRSPortugal
| | - Fritz E. Kühn
- Department of Chemistry and Catalysis Research Center, Molecular CatalysisTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| |
Collapse
|
5
|
Bernd MA, Bauer EB, Oberkofler J, Bauer A, Reich RM, Kühn FE. Macrocyclic NHC complexes of group 10 elements with enlarged aromaticity for biological studies. Dalton Trans 2020; 49:14106-14114. [PMID: 33016296 DOI: 10.1039/d0dt02598d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Two sets of macrocyclic, bio-inspired, non-heme ligands are utilized for the synthesis of NiII, PdII and PtII complexes. The ligands consist of a 16-atom macrocycle, formed by four methylene bridged NHC moieties, with imidazole or benzimidazole as building blocks. The complexes exhibit a square planar coordination geometry and are characterized by NMR, ESI-MS, elemental analysis, SC-XRD and UV/Vis. For complexes incorporating benzimidazole, an evaluation of luminescence properties is performed, and is found that phosphorescence is present for the PdII derivative and there is fluorescence for the PtII derivative. Stability studies in cell culture medium are performed for subsequent MTT assays. Here, the NiII complexes show low to no activity, and PdII and PtII complexes exhibit remarkable low IC50 values in cisplatin resistant A2780cisR cells.
Collapse
Affiliation(s)
- Marco A Bernd
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching b. München, Germany.
| | - Elisabeth B Bauer
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching b. München, Germany.
| | - Jens Oberkofler
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching b. München, Germany.
| | - Andreas Bauer
- Department of Chemistry and Catalysis Research Center, Chair of Organic Chemistry I, Technische Universität München, Lichtenbergstr. 4, 85747 Garching b. München, Germany.
| | - Robert M Reich
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching b. München, Germany.
| | - Fritz E Kühn
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching b. München, Germany.
| |
Collapse
|
6
|
Dominelli B, Jakob CH, Oberkofler J, Fischer PJ, Esslinger EM, Reich RM, Marques F, Pinheiro T, Correia JD, Kühn FE. Mechanisms underlying the cytotoxic activity of syn/anti-isomers of dinuclear Au(I) NHC complexes. Eur J Med Chem 2020; 203:112576. [DOI: 10.1016/j.ejmech.2020.112576] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/10/2020] [Accepted: 06/11/2020] [Indexed: 02/09/2023]
|
7
|
Jakob CHG, Dominelli B, Hahn EM, Berghausen TO, Pinheiro T, Marques F, Reich RM, Correia JDG, Kühn FE. Antiproliferative Activity of Functionalized Histidine-derived Au(I) bis-NHC Complexes for Bioconjugation. Chem Asian J 2020; 15:2754-2762. [PMID: 32592289 PMCID: PMC7689731 DOI: 10.1002/asia.202000620] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/20/2020] [Indexed: 12/23/2022]
Abstract
A series of histidine derived Au(I) bis-NHC complexes bearing different ester, amide and carboxylic acid functionalities as well as wingtip substituents is synthesized and characterized. The stability in aqueous media, in vitro cytotoxicity in a set of cancer cell lines (MCF7, PC3 and A2780/A2780cisR) along with the cellular uptake are evaluated. Stability tests suggest hydrolysis of the ester within 8 h, which might lead to deactivation. Furthermore, the bis-NHC system shows a sufficient stability against cysteine and the thiol containing peptide GSH. The benzyl ester and amide show the highest activity comparable to the benchmark compound cisplatin, with the ester only displaying a slightly lower cytotoxicity than the amide. A cellular uptake study revealed that the benzyl ester and the amide could have different intracellular distribution profiles but both complexes induce perturbations of the cellular physiological processes. The simple modifiability and high stability of the complexes provides a promising system for upcoming post modifications to enable targeted cancer therapy.
Collapse
Affiliation(s)
- Christian H. G. Jakob
- Molecular CatalysisCatalysis Research Center and Department of Chemistry Department Technische Universität MünchenLichtenbergstrasse 4D-85748Garching bei MünchenGermany
| | - Bruno Dominelli
- Molecular CatalysisCatalysis Research Center and Department of Chemistry Department Technische Universität MünchenLichtenbergstrasse 4D-85748Garching bei MünchenGermany
| | - Eva M. Hahn
- Molecular CatalysisCatalysis Research Center and Department of Chemistry Department Technische Universität MünchenLichtenbergstrasse 4D-85748Garching bei MünchenGermany
| | - Tobias O. Berghausen
- Molecular CatalysisCatalysis Research Center and Department of Chemistry Department Technische Universität MünchenLichtenbergstrasse 4D-85748Garching bei MünchenGermany
| | - Teresa Pinheiro
- Institute for Bioengineering and BiosciencesDepartamento de Engenharia e Ciências NuclearesInstituto Superior TécnicoUniversidade de LisboaAv. Rovisco Pais 11049-001LisboaPortugal
| | - Fernanda Marques
- Centro de Ciências e Tecnologias NuclearesDepartamento de Engenharia e Ciências NuclearesInstituto Superior TécnicoUniversidade de LisboaCTN, Estrada Nacional 10 (km 139,7)2695-066Bobadela LRSPortugal
| | - Robert M. Reich
- Molecular CatalysisCatalysis Research Center and Department of Chemistry Department Technische Universität MünchenLichtenbergstrasse 4D-85748Garching bei MünchenGermany
| | - João D. G. Correia
- Centro de Ciências e Tecnologias NuclearesDepartamento de Engenharia e Ciências NuclearesInstituto Superior TécnicoUniversidade de LisboaCTN, Estrada Nacional 10 (km 139,7)2695-066Bobadela LRSPortugal
| | - Fritz E. Kühn
- Molecular CatalysisCatalysis Research Center and Department of Chemistry Department Technische Universität MünchenLichtenbergstrasse 4D-85748Garching bei MünchenGermany
| |
Collapse
|
8
|
Synthesis and Biological Studies on Dinuclear Gold(I) Complexes with Di-( N-Heterocyclic Carbene) Ligands Functionalized with Carbohydrates. Molecules 2020; 25:molecules25173850. [PMID: 32847116 PMCID: PMC7503629 DOI: 10.3390/molecules25173850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 12/31/2022] Open
Abstract
The design of novel metal complexes with N-heterocyclic carbene (NHC) ligands that display biological activity is an active research field in organometallic chemistry. One of the possible approaches consists of the use of NHC ligands functionalized with a carbohydrate moiety. Two novel Au(I)–Au(I) dinuclear complexes were synthesized; they present a neutral structure with one bridging diNHC ligand, having one or both heterocyclic rings decorated with a carbohydrate functionality. With the symmetric diNHC ligand, the dicationic dinuclear complex bearing two bridging diNHC ligands was also synthesized. The study was completed by analyzing the antiproliferative properties of these complexes, which were compared to the activity displayed by similar mononuclear Au(I) complexes and by the analogous bimetallic Au(I)–Au(I) complex not functionalized with carbohydrates.
Collapse
|
9
|
Jakob CHG, Dominelli B, Rieb J, Jandl C, Pöthig A, Reich RM, Correia JDG, Kühn FE. Dinuclear Gold(I) Complexes Bearing N,N'-Allyl-Bridged Bisimidazolylidene Ligands. Chem Asian J 2020; 15:1848-1851. [PMID: 32348033 PMCID: PMC7687270 DOI: 10.1002/asia.202000453] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/28/2020] [Indexed: 11/30/2022]
Abstract
A novel N,N'-allyl-bridged bisimidazolium salt and a novel dinuclear Ag(I) and a Au(I) NHC complex are reported. Both metallacyclic complexes have a twisted structural shape due to the rigid allylic system and form two different isomers relating to the position of the double bonds. The allyl-group shows photoisomerisation, but no reactivity towards bases for the additional coordination of Pd(II).
Collapse
Affiliation(s)
- Christian H. G. Jakob
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| | - Bruno Dominelli
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| | - Julia Rieb
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| | - Christian Jandl
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| | - Alexander Pöthig
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| | - Robert M. Reich
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| | - João D. G. Correia
- Centro de Ciências e Tecnologias Nucleares and Departamento de Engenharia e Ciências NuclearesInstituto Superior TécnicoUniversidade de LisboaCampus Tecnológico e NuclearEstrada Nacional N° 10 (km 139,7)2695-066Bobadela LRSPortugal
| | - Fritz E. Kühn
- Catalysis Research CenterMolecular CatalysisTechnische Universität MünchenErnst-Otto-Fischer-Straße 1D-85748Garching bei MünchenGermany
| |
Collapse
|
10
|
Vellé A, Rodríguez-Santiago L, Sodupe M, Sanz Miguel PJ. Enhanced Metallophilicity in Metal-Carbene Systems: Stronger Character of Aurophilic Interactions in Solution. Chemistry 2020; 26:997-1002. [PMID: 31729079 DOI: 10.1002/chem.201904507] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Indexed: 12/28/2022]
Abstract
Metallophilicity is an essential concept that builds upon the attraction between closed shell metal ions. We report on the [M2 (bisNHC)2 ]2+ (M=AuI , AgI ; NHC=N-heterocyclic carbene) systems, which display almost identical features in the solid state. However, in solution the Au2 cation exhibits a significantly higher degree of rigidity owed to the stronger character of the aurophilic interactions. Both Au2 and Ag2 cationic constructs are able to accommodate Ag+ ions via M-M interactions, despite their inherent Coulombic repulsion. When electrostatic repulsion between host and guest is partially diminished, M-M distances are substantially shortened. Quantum chemical calculations estimate intermetallic bond orders up to 0.2. Although at the limit of (or beyond) the van der Waals radii, metallophilic interactions are responsible for their behavior in solution.
Collapse
Affiliation(s)
- Alba Vellé
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Luis Rodríguez-Santiago
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Mariona Sodupe
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Pablo J Sanz Miguel
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| |
Collapse
|
11
|
Beillard A, Quintin F, Gatignol J, Retailleau P, Renaud JL, Gaillard S, Métro TX, Lamaty F, Bantreil X. Solving the challenging synthesis of highly cytotoxic silver complexes bearing sterically hindered NHC ligands with mechanochemistry. Dalton Trans 2020; 49:12592-12598. [DOI: 10.1039/d0dt00410c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Challenging silver(i) NHC complexes displaying cytotoxicity 256 times higher than cisplatin were synthesized by ball-milling.
Collapse
Affiliation(s)
| | | | | | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
- France
| | | | | | | | | | | |
Collapse
|
12
|
Li Z, Mackie ERR, Ramkissoon P, Mather JC, Wiratpruk N, Soares da Costa TP, Barnard PJ. Synthesis, conformational analysis and antibacterial activity of Au(i)–Ag(i) and Au(i)–Hg(ii) heterobimetallic N-heterocyclic carbene complexes. Dalton Trans 2020; 49:12820-12834. [DOI: 10.1039/d0dt02225j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A family heterobimetallic Au(i)–Ag(i) and Au(i)–Hg(ii) complexes of bis-N-heterocyclic carbene ligands been prepared and their antibacterial properties evaluated.
Collapse
Affiliation(s)
- Zili Li
- Department of Chemistry and Physics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| | - Emily R. R. Mackie
- Department of Biochemistry and Genetics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| | - Pria Ramkissoon
- Department of Chemistry and Physics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| | - Joel C. Mather
- Department of Chemistry and Physics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| | - Nuchareenat Wiratpruk
- Department of Chemistry and Physics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| | - Tatiana P. Soares da Costa
- Department of Biochemistry and Genetics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| | - Peter J. Barnard
- Department of Chemistry and Physics
- La Trobe Institute for Molecular Science
- La Trobe University
- Australia
| |
Collapse
|
13
|
Baron M, Dall’Anese A, Miolato A, Cairoli MLC, Di Marco V, Graiff C, Pöthig A, Tubaro C. New homoleptic gold carbene complexes via Ag–Au transmetalation: synthesis and application of [Au(diNHC) 2] 3+ cations as 1H-NMR and UV-vis halide sensors. NEW J CHEM 2020. [DOI: 10.1039/c9nj05809e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Novel homoleptic gold(iii) complexes with bidentate N-heterocyclic carbene ligands have been successfully synthesised by transmetalation reaction and studied as anion sensors in solution by means of 1H NMR and UV-vis titration experiments.
Collapse
Affiliation(s)
- Marco Baron
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Anna Dall’Anese
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Alessandro Miolato
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | | | - Valerio Di Marco
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Claudia Graiff
- Dipartimento di Scienze Chimiche
- della Vita e della Sostenibilità Ambientale
- Università degli Studi di Parma
- 43124 Parma
- Italy
| | - Alexander Pöthig
- Department of Chemistry and Catalysis Research Center
- Technical University of Munich
- Garching
- Germany
| | - Cristina Tubaro
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| |
Collapse
|
14
|
Bauer EB, Bernd MA, Schütz M, Oberkofler J, Pöthig A, Reich RM, Kühn FE. Synthesis, characterization, and biological studies of multidentate gold(i) and gold(iii) NHC complexes. Dalton Trans 2019; 48:16615-16625. [PMID: 31657405 DOI: 10.1039/c9dt03183a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The synthesis and characterization of a novel macrocyclic Au(iii) N-heterocyclic carbene (NHC) imidazolyl complex, a novel macrocyclic tetra-NHC benzimidazole ligand, and the corresponding Ag(i) and Au(i) complexes are presented. Single-crystal X-ray diffraction analysis of the Au(i) benzimidazolyl complex 3 reveals an unusual structure, differing from the respective Au(i) imidazolyl complex 4. Both complexes have a Au4L2 composition; however, 3 has two C-Au(i)-C units acting as a connection between the two ligands with two Au(i) atoms being linearly coordinated inside the cavity of the macrocyclic ligand. In the case of complex 4, the structure shows a box-type coordination with all four Au(i) atoms being located between the two ligands. Stability studies in cell culture medium are performed for subsequent MTT assays and they show an unprecedented proton-to-deuterium exchange of the methylene bridge of the Au(iii) imidazolyl complex. In MTT assays, the tetranuclear acyclic Au(i) complex 5 displays the lowest IC50 values in MCF-7, PC3, and A2780cisR cells with a selective cytotoxicity for MCF-7 and A2780cisR cells.
Collapse
Affiliation(s)
- Elisabeth B Bauer
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany.
| | - Marco A Bernd
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany.
| | - Max Schütz
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany. and Department of Chemistry and Catalysis Research Center, Chair of Inorganic and Metal-Organic Chemistry, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany
| | - Jens Oberkofler
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany.
| | - Alexander Pöthig
- Single Crystal XRD Laboratory of the Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Str. 1, 85747 Garching bei München, Germany
| | - Robert M Reich
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany.
| | - Fritz E Kühn
- Department of Chemistry and Catalysis Research Center, Molecular Catalysis, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany.
| |
Collapse
|
15
|
Dominelli B, Roberts GM, Jandl C, Fischer PJ, Reich RM, Pöthig A, Correia JDG, Kühn FE. Dinuclear zwitterionic silver(i) and gold(i) complexes bearing 2,2-acetate-bridged bisimidazolylidene ligands. Dalton Trans 2019; 48:14036-14043. [PMID: 31490498 DOI: 10.1039/c9dt03035b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Four novel dinuclear Ag(i) and Au(i) NHC complexes bearing two 2,2-acetate-bridged bisimidazolylidene ligands (R = Me and iPr) of zwitterionic and metallacyclic forms are reported. The functionalized methylene bridge of the ligands leads to water soluble complexes, which have been characterized by NMR and IR spectroscopy, elemental analysis and single crystal X-ray diffraction in the case of La-H2-PF6, Ag2(La)2, Ag2(Lb)2 and Au2(La)2. Dimerization processes caused by hydrogen bonding or Ag(i)-carboxylate interactions in the solid state were observed for La-H2-PF6 and Ag2(La)2. DOSY NMR experiments confirmed that both bisimidazolium salts appear as dimers in aqueous solutions, in contrast to the corresponding monomeric Ag(i) and Au(i) complexes. Both gold(i) complexes form syn- and anti-isomers analogous to the reference coinage metal-based complexes. Protonation studies of the syn-isomer gold(i) complex Au2(La)2 were successful, whereas post-modification esterification or amidation reactions were not feasible. Additionally, decarboxylation reactions (thermally induced Krapcho- or oxidative Hunsdiecker-type) of the bisimidazolium salts were observed. Thus, the proximity of the carboxyl moiety to imidazolium/imidazolylidene rings seems to negatively affect stability and reactivity.
Collapse
Affiliation(s)
- Bruno Dominelli
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| | - Gerri M Roberts
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| | - Christian Jandl
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| | - Pauline J Fischer
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| | - Robert M Reich
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| | - Alexander Pöthig
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| | - João D G Correia
- Centro de Ciências e Tecnologias Nucleares, Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional N° 10 (km 139, 7), 2695-066 Bobadela LRS, Portugal
| | - Fritz E Kühn
- Catalysis Research Center, Molecular Catalysis, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85748 Garching bei München, Germany.
| |
Collapse
|
16
|
Hussaini SY, Haque RA, Li J, Zhan S, Tan KW, Razali MR. Coinage metal complexes of N‐heterocyclic carbene bearing nitrile functionalization: Synthesis and photophysical properties. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4927] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Sunusi Y. Hussaini
- School of Chemical SciencesUniversiti Sains Malaysia Malaysia
- Department of ChemistryKano University of Science and Technology Wudil Kano Nigeria
| | | | - Jing‐Hong Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong ProvinceShantou University Shantou 515063 China
| | - Shun‐Ze Zhan
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong ProvinceShantou University Shantou 515063 China
| | - Kong Wai Tan
- Department of Chemistry, Faculty of ScienceUniversiti Malaya Kuala Lumpur Malaysia
| | - Mohd. R. Razali
- School of Chemical SciencesUniversiti Sains Malaysia Malaysia
| |
Collapse
|
17
|
Gajare S, Jagadale M, Naikwade A, Bansode P, Rashinkar G. Facile Chan‐Lam coupling using ferrocene tethered
N
‐heterocyclic carbene‐copper complex anchored on graphene. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4915] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shivanand Gajare
- Department of ChemistryShivaji University Kolhapur 416004 MS India
| | - Megha Jagadale
- Department of ChemistryShivaji University Kolhapur 416004 MS India
| | | | - Prakash Bansode
- Department of ChemistryShivaji University Kolhapur 416004 MS India
| | | |
Collapse
|
18
|
Recent progress in silver(I)-, gold(I)/(III)- and palladium(II)-N-heterocyclic carbene complexes: A review towards biological perspectives. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.01.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
19
|
Monticelli M, Baron M, Tubaro C, Bellemin-Laponnaz S, Graiff C, Bottaro G, Armelao L, Orian L. Structural and Luminescent Properties of Homoleptic Silver(I), Gold(I), and Palladium(II) Complexes with nNHC- tzNHC Heteroditopic Carbene Ligands. ACS OMEGA 2019; 4:4192-4205. [PMID: 31459629 PMCID: PMC6648577 DOI: 10.1021/acsomega.8b03668] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 02/12/2019] [Indexed: 05/20/2023]
Abstract
Novel silver(I), gold(I), and palladium(II) complexes were synthesized with bidentate heteroditopic carbene ligands that combine an imidazol-2-ylidene (nNHC) with a 1,2,3-triazol-5-ylidene (tzNHC) connected by a propylene bridge. The silver(I) and gold(I) complexes were dinuclear species, [M2(nNHC-tzNHC)2](PF6)2 (M = Ag or Au), with the two bidentate ligands bridging the metal centers, whereas in the palladium(II) complex [Pd(nNHC-tzNHC)2](PF6)2, the two ligands were chelated on the same metal center. Because of the presence of two different carbene units, isomers were observed for the gold(I) and palladium(II) complexes. The molecular structures of the head-to-tail isomer for gold(I) complexes, with a twisted or folded-syn conformation of the bridge between the carbene units, were determined by X-ray diffraction analysis. The study was completed with a systematic structural investigation through density functional theory (DFT) calculations. For palladium(II) species, the head-to-head form was structurally characterized. The dinuclear gold(I) complexes were emissive in the solid state in the blue region (PLQY up to 8%); time-dependent density functional theory (abbreviated as TD-DFT) calculations disclosed that the absorption bands have metal-to-ligand-charge-transfer character and evidenced that the emission occurs from the T1 level (phosphorescence).
Collapse
Affiliation(s)
- Marco Monticelli
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, via F. Marzolo 1, 35131 Padova, Italy
- Institut
de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg UMR7504, 23 rue du Loess BP 43, 67034 Strasbourg, France
| | - Marco Baron
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, via F. Marzolo 1, 35131 Padova, Italy
| | - Cristina Tubaro
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, via F. Marzolo 1, 35131 Padova, Italy
- E-mail: (C.T.)
| | - Stéphane Bellemin-Laponnaz
- Institut
de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg UMR7504, 23 rue du Loess BP 43, 67034 Strasbourg, France
- E-mail: (S.B.-L.)
| | - Claudia Graiff
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università degli Studi di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Gregorio Bottaro
- Istituto
di Chimica della Materia Condensata e di Tecnologie per l’Energia,
ICMATE-CNR, via Marzolo 1, 35131 Padova, Italy
| | - Lidia Armelao
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, via F. Marzolo 1, 35131 Padova, Italy
- Istituto
di Chimica della Materia Condensata e di Tecnologie per l’Energia,
ICMATE-CNR, via Marzolo 1, 35131 Padova, Italy
| | - Laura Orian
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, via F. Marzolo 1, 35131 Padova, Italy
| |
Collapse
|
20
|
Aucamp D, Kumar SV, Liles DC, Fernandes MA, Harmse L, Bezuidenhout DI. Synthesis of heterobimetallic gold(i) ferrocenyl-substituted 1,2,3-triazol-5-ylidene complexes as potential anticancer agents. Dalton Trans 2019; 47:16072-16081. [PMID: 30276400 DOI: 10.1039/c8dt03116a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
1,2,3-Triazol-5-ylidene (trz) complexes of gold(i) containing a ferrocenyl substituent on the C4-position of the trz ring were synthesized to yield the neutral heterobimetallic gold(i) trz chlorido (2), gold(i) trz phenyl (3), and the cationic gold(i) trz triphenylphospine (5) complexes. In order to compare the effect of silver(i) as central metal vs. gold(i), [Ag(trz)2]+ (4) was also prepared, while variation of the C4-1,2,3-triazol-5-ylidene substituent from a ferrocenyl to a phenyl group was done to prepare the monometallic analogue of 5, namely the cationic Au(i) trz triphenylphosphine complex 6. The complexes were characterised with spectroscopic and electrochemical methods, and the single crystal X-ray structures of 2-6 were determined. NMR stability studies of 5 as a representative example of the series of complexes were performed to confirm the stability of the complexes in the solvent dimethylsulfoxide and in aqueous solution. The anti-cancer potential of 5 was evaluated against the lung cancer cell lines A549 and H1975, and the human embryonic kidney cell line (HEK-293) was used as a non-cancer model. IC50 values of 0.89, 0.23 and 5.43 μM, respectively, were obtained for A549, H1975 and HEK-293, respectively, indicating the activity and selectivity of 5 for cancer cells. Fluorescence microscopy experiments as a preliminary mode-of-action study evidenced an apoptotic cell death mechanism rather than necrotic cell death.
Collapse
Affiliation(s)
- Danielle Aucamp
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa.
| | | | | | | | | | | |
Collapse
|
21
|
Mora M, Gimeno MC, Visbal R. Recent advances in gold–NHC complexes with biological properties. Chem Soc Rev 2019; 48:447-462. [DOI: 10.1039/c8cs00570b] [Citation(s) in RCA: 204] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This tutorial review covers the recent advances made in the study of gold complexes containing N-heterocyclic carbene ligands with biological properties.
Collapse
Affiliation(s)
- Malka Mora
- Departamento de Ciencias Naturales y Exactas
- Universidad de la Costa
- 080002 Barranquilla
- Colombia
| | - M. Concepción Gimeno
- Departamento de Química Inorgánica
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- CSIC-Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | - Renso Visbal
- Departamento de Ciencias Naturales y Exactas
- Universidad de la Costa
- 080002 Barranquilla
- Colombia
- Departamento de Gestión Industrial
| |
Collapse
|
22
|
Xu X, Zhang Z, Huang S, Cao L, Liu W, Yan X. 4-Halo-1,2,3-triazolylidenes: stable carbenes featuring halogen bonding. Dalton Trans 2019; 48:6931-6941. [PMID: 31038514 DOI: 10.1039/c9dt01018a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Synthesis and coordination of 4-halo-1,2,3-triazolylidenes have been developed. These novel ligands featured the character with σ-donation at carbon and a σ-hole at the halogen. Halogen bonding was observed by single crystal X-ray diffraction in their coinage metal complexes. The electronic properties of 4-iodo-1,2,3-triazolylidene were studied by both Ir-CO frequencies of the Tolman electronic parameter (TEP) and Huynh's electronic parameter (HEP) method, which suggested similar electronic properties to those of imidazolylidenes. During HEP tests, an interesting tunability was observed when different electron donors were employed.
Collapse
Affiliation(s)
- Xingyu Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, People's Republic of China.
| | | | | | | | | | | |
Collapse
|
23
|
Gardiner MG, Ho CC. Recent advances in bidentate bis(N-heterocyclic carbene) transition metal complexes and their applications in metal-mediated reactions. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.02.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
24
|
Gan MM, Liu JQ, Zhang L, Wang YY, Hahn FE, Han YF. Preparation and Post-Assembly Modification of Metallosupramolecular Assemblies from Poly(N-Heterocyclic Carbene) Ligands. Chem Rev 2018; 118:9587-9641. [DOI: 10.1021/acs.chemrev.8b00119] [Citation(s) in RCA: 202] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ming-Ming Gan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Ji-Quan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Le Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Yao-Yu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - F. Ekkehardt Hahn
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, D-48149 Münster, Germany
| | - Ying-Feng Han
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| |
Collapse
|
25
|
Medicinal Applications of Gold(I/III)-Based Complexes Bearing N-Heterocyclic Carbene and Phosphine Ligands. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.04.023] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
26
|
Ganguly P, Breen A, Pillai SC. Toxicity of Nanomaterials: Exposure, Pathways, Assessment, and Recent Advances. ACS Biomater Sci Eng 2018; 4:2237-2275. [DOI: 10.1021/acsbiomaterials.8b00068] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Priyanka Ganguly
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo F91 YW50, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo F91 YW50, Ireland
| | - Ailish Breen
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo F91 YW50, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo F91 YW50, Ireland
| | - Suresh C. Pillai
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo F91 YW50, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo F91 YW50, Ireland
| |
Collapse
|
27
|
Choo KB, Mah WL, Lee SM, Lee WL, Cheow YL. Palladium complexes of bidentate pyridineN-heterocyclic carbenes: Optical resolution, antimicrobial and cytotoxicity studies. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4377] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Kar Bee Choo
- School of Science, Monash University Malaysia; Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| | - Wee Li Mah
- School of Science, Monash University Malaysia; Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| | - Sui Mae Lee
- School of Science, Monash University Malaysia; Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| | - Wai Leng Lee
- School of Science, Monash University Malaysia; Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| | - Yuen Lin Cheow
- School of Science, Monash University Malaysia; Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| |
Collapse
|
28
|
Puerta-Oteo R, Jiménez MV, Lahoz FJ, Modrego FJ, Passarelli V, Pérez-Torrente JJ. Zwitterionic Rhodium and Iridium Complexes Based on a Carboxylate Bridge-Functionalized Bis-N-heterocyclic Carbene Ligand: Synthesis, Structure, Dynamic Behavior, and Reactivity. Inorg Chem 2018; 57:5526-5543. [PMID: 29624050 DOI: 10.1021/acs.inorgchem.8b00498] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of water-soluble zwitterionic complexes featuring a carboxylate bridge-functionalized bis-N-heterocyclic carbene ligand of formula [Cp*MIIICl{(MeIm)2CHCOO}] and [MI(diene){(MeIm)2CHCOO}] (Cp* = 1,2,3,4,5-pentamethylcyclopentadienyl; M = Rh, Ir; MeIm = 3-methylimidazol-2-yliden-1-yl; diene = 1,5-cyclooctadiene (cod), norbornadiene (nbd)) were prepared from the salt [(MeImH)2CHCOO]Br and suitable metal precursor. The solid-state structure of both types of complexes shows a boat-shaped six-membered metallacycle derived of the κ2C,C' coordination mode of the bis-NHC ligand. The uncoordinated carboxylate fragment is found at the bowsprit position in the Cp*MIII complexes, whereas in the MI(diene) complexes it is at the flagpole position of the metallacycle. The complexes [RhI(diene){(MeIm)2CHCOO}] (diene = cod, nbd) exist as two conformational isomers in dichloromethane, bowsprit and flagpole, that interconvert through the boat-to-boat inversion of the metallacycle. An inversion barrier of ∼17 kcal·mol-1 was determined by two-dimensional exchange spectroscopy NMR measurements for [RhI(cod){(MeIm)2CHCOO}]. Reaction of zwitterionic Cp*MIII complexes with methyl triflate or tetrafluoroboric acid affords the cationic complexes [Cp*MIIICl{(MeIm)2CHCOOMe}]+ or [Cp*MIIICl{(MeIm)2CHCOOH}]+ (M = Rh, Ir) featuring carboxy and methoxycarbonyl functionalized methylene-bridged bis-NHC ligands, respectively. Similarly, complexes [MI(diene){(MeIm)2CHCOOMe}]+ (M = Rh, Ir) were prepared by alkylation of the corresponding zwitterionic MI(diene) complexes with methyl triflate. In contrast, reaction of [IrI(cod){(MeIm)2CHCOO}] with HBF4·Et2O (Et = ethyl), CH3OTf, CH3I, or I2 gives cationic iridium(III) octahedral complexes [IrIIIX(cod){(MeIm)2CHCOO}]+ (X = H, Me, or I) featuring a tripodal coordination mode of the carboxylate bridge-functionalized bis-NHC ligand. The switch from κ2C,C' to κ3C,C',O coordination of the bis-NHC ligand accompanying the oxidative addition prevents the coordination of the anions eventually formed in the process that remain as counterions.
Collapse
Affiliation(s)
- Raquel Puerta-Oteo
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea , Universidad de Zaragoza-CSIC, Facultad de Ciencias , C/Pedro Cerbuna, 12 , 50009 Zaragoza , Spain
| | - M Victoria Jiménez
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea , Universidad de Zaragoza-CSIC, Facultad de Ciencias , C/Pedro Cerbuna, 12 , 50009 Zaragoza , Spain
| | - Fernando J Lahoz
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea , Universidad de Zaragoza-CSIC, Facultad de Ciencias , C/Pedro Cerbuna, 12 , 50009 Zaragoza , Spain
| | - F Javier Modrego
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea , Universidad de Zaragoza-CSIC, Facultad de Ciencias , C/Pedro Cerbuna, 12 , 50009 Zaragoza , Spain
| | - Vincenzo Passarelli
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea , Universidad de Zaragoza-CSIC, Facultad de Ciencias , C/Pedro Cerbuna, 12 , 50009 Zaragoza , Spain.,Centro Universitario de la Defensa , Ctra. Huesca s/n , ES-50090 Zaragoza , Spain
| | - Jesús J Pérez-Torrente
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea , Universidad de Zaragoza-CSIC, Facultad de Ciencias , C/Pedro Cerbuna, 12 , 50009 Zaragoza , Spain
| |
Collapse
|
29
|
Lindhorst AC, Kaspar M, Altmann PJ, Pöthig A, Kühn FE. Synthesis, characterization and derivatization of hydroxyl-functionalized iron(ii) bis(NHC) complexes. Dalton Trans 2018; 47:1857-1867. [PMID: 29337326 DOI: 10.1039/c7dt04774f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses of a novel hydroxyl-functionalized tetradentate NHC/pyridine hybrid ligand and the corresponding Ag(i) and Fe(ii) complexes are presented. Spectroscopic and X-ray diffraction techniques are used for structural investigations and cyclic voltammetry measurements reveal interesting electronic properties. Transmetalation of the trinuclear Ag(i) complex (C1) yields a mononuclear and a dinuclear iron(ii) bis(NHC) complex (C2 and C3), which can be separated by stepwise precipitation. The former is isostructural to iron(ii) bis(NHC) complex A, which is a versatile oxidation catalyst. Furthermore, suitable conditions for esterification reactions of the ligand precursor and iron(ii) bis(NHC) complex (C2) have been established, demonstrating the utility of the hydroxyl functionality for immobilization and derivatization purposes.
Collapse
Affiliation(s)
- Anja C Lindhorst
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, D-85747 Garching bei München, Germany.
| | | | | | | | | |
Collapse
|
30
|
Kaub C, Lebedkin S, Li A, Kruppa SV, Strebert PH, Kappes MM, Riehn C, Roesky PW. Bimetallic d 10 -Metal Complexes of a Bipyridine Substituted N-Heterocyclic Carbene. Chemistry 2018; 24:6094-6104. [PMID: 29377298 DOI: 10.1002/chem.201705757] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Indexed: 12/18/2022]
Abstract
The hybrid ligand 3-(2,2'-bipyridine-6-ylmethyl)-1-mesityl-1H-imidazolylidene (NHCBipy ) featuring both carbene and N-donor sites, was selectively complexed with various d10 metal cations in order to examine its coordination behavior with regard to homo and heterometallic structures. Respective silver complexes can be obtained by the silver oxide route and are suitable transmetallation reagents for the synthesis of gold(I) compounds. Starting from the mononuclear complexes [(NHCBipy )AuCl], [(NHCBipy )Au(C6 F5 )] and [(NHCBipy )2 Au][ClO4 ], open-chain as well as cyclic heterobimetallic complexes containing Cu+ , Ag+ , Zn2+ , Cd2+ , and Hg2+ were synthesized. Furthermore, the homobimetallic species [(NHCBipy )2 M2 ][ClO4 ]2 (M=Cu, Ag) were obtained. All bimetallic compounds were fully characterized including single-crystal X-ray analysis. Their photoluminescence (PL) properties were investigated in the solid state at temperatures between 15 and 295 K and compared with those of the mononuclear species. There is a clear difference in PL properties between the open chain and the cyclic heterobimetallic complexes. The latter species show different PL properties, depending on the metals involved. In addition, collision-induced dissociation (CID) experiments were performed on electrosprayed cations of the cyclic heterobimetallic compounds, to compare the metal binding at the carbene and N-donor sites.
Collapse
Affiliation(s)
- Christoph Kaub
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technologie (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Sergei Lebedkin
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Alina Li
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 2, 76131, Karlsruhe, Germany
| | - Sebastian V Kruppa
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger Str. 52-54, 67663, Kaiserslautern, Germany
| | - Patrick H Strebert
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger Str. 52-54, 67663, Kaiserslautern, Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 2, 76131, Karlsruhe, Germany
| | - Christoph Riehn
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger Str. 52-54, 67663, Kaiserslautern, Germany.,Forschungszentrum OPTIMAS, TU Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663, Kaiserslautern, Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technologie (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| |
Collapse
|
31
|
Batchelor LK, Păunescu E, Soudani M, Scopelliti R, Dyson PJ. Influence of the Linker Length on the Cytotoxicity of Homobinuclear Ruthenium(II) and Gold(I) Complexes. Inorg Chem 2017; 56:9617-9633. [DOI: 10.1021/acs.inorgchem.7b01082] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Lucinda K. Batchelor
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Emilia Păunescu
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Mylène Soudani
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Paul J. Dyson
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| |
Collapse
|