1
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Solea AB, Ward MD. A chemiluminescent lantern: a coordination cage catalysed oxidation of luminol followed by chemiluminescence resonance energy-transfer. Dalton Trans 2023; 52:4456-4461. [PMID: 36917490 PMCID: PMC10071490 DOI: 10.1039/d3dt00689a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
A molecule of luminol bound as guest inside a Co8 coordination cage host undergoes oxidation by H2O2 to generate chemiluminescence by a process in which the Co(II) ions in the cage superstructure activate the H2O2: accordingly the cage not only co-locates the reactants but also acts as a redox partner in the catalysis. The luminescence from oxidation of the cavity-bound luminol can transfer its excitation energy to surface-bound fluorescein molecules in an unusual example of Chemiluminescence Resonance Energy Transfer (CRET).
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Affiliation(s)
- Atena B Solea
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
| | - Michael D Ward
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
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2
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Carrillo U, Francés-Monerris A, Marri AR, Cebrián C, Gros PC. Substituent-Induced Control of fac/ mer Isomerism in Azine-NHC Fe(II) Complexes. ACS ORGANIC & INORGANIC AU 2022; 2:525-536. [PMID: 36855530 PMCID: PMC9955161 DOI: 10.1021/acsorginorgau.2c00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/29/2022]
Abstract
The stereoselective synthesis of geometrical iron(II) complexes bearing azine-NHC ligands is described. Facial and meridional selectivity is achieved as a function of the steric demand of the azine unit, with no remarkable influence of the carbene nature. More specifically, meridional complexes are obtained upon selecting bulky 5-mesityl-substituted pyridyl coordinating units. Unexpectedly, increase of the steric hindrance in the α position with respect to the N coordinating atom results in an exclusive facial configuration, which is in stark contrast to the meridional selectivity induced by other reported α-substituted bidentate ligands. Investigation of the structure and the optical and electrochemical properties of the here-described complexes has revealed the non-negligible effect of the fac/mer ligand configuration around the metal center.
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3
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McTernan C, Davies JA, Nitschke JR. Beyond Platonic: How to Build Metal-Organic Polyhedra Capable of Binding Low-Symmetry, Information-Rich Molecular Cargoes. Chem Rev 2022; 122:10393-10437. [PMID: 35436092 PMCID: PMC9185692 DOI: 10.1021/acs.chemrev.1c00763] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Indexed: 12/17/2022]
Abstract
The field of metallosupramolecular chemistry has advanced rapidly in recent years. Much work in this area has focused on the formation of hollow self-assembled metal-organic architectures and exploration of the applications of their confined nanospaces. These discrete, soluble structures incorporate metal ions as 'glue' to link organic ligands together into polyhedra.Most of the architectures employed thus far have been highly symmetrical, as these have been the easiest to prepare. Such high-symmetry structures contain pseudospherical cavities, and so typically bind roughly spherical guests. Biomolecules and high-value synthetic compounds are rarely isotropic, highly-symmetrical species. To bind, sense, separate, and transform such substrates, new, lower-symmetry, metal-organic cages are needed. Herein we summarize recent approaches, which taken together form the first draft of a handbook for the design of higher-complexity, lower-symmetry, self-assembled metal-organic architectures.
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Affiliation(s)
| | | | - Jonathan R. Nitschke
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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4
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Park S, Kim D, Kim D, Kim D, Jung OS. A cyclic manipulation of cage isomers via anion exchange and thermal isomerism. Chem Commun (Camb) 2021; 57:2919-2922. [PMID: 33617614 DOI: 10.1039/d0cc08303h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A cyclic manipulation of peanut cage isomers has been achieved via anion exchange and unusual cage isomerism.
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Affiliation(s)
- Seonghyeon Park
- Department of Chemistry, Pusan National University, Busan 46241, Republic of Korea.
| | - Dongwon Kim
- Department of Chemistry, Pusan National University, Busan 46241, Republic of Korea.
| | - Doheon Kim
- Department of Chemistry, Pusan National University, Busan 46241, Republic of Korea.
| | - Dongwook Kim
- Center for Hydrocarbon Functionalizations, IBS, Daejon 34141, Republic of Korea
| | - Ok-Sang Jung
- Department of Chemistry, Pusan National University, Busan 46241, Republic of Korea.
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5
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Argent SP, Jackson FC, Chan HM, Meyrick S, Taylor CGP, Ronson TK, Rourke JP, Ward MD. A family of diastereomeric dodecanuclear coordination cages based on inversion of chirality of individual triangular cyclic helicate faces. Chem Sci 2020; 11:10167-10174. [PMID: 34094280 PMCID: PMC8162429 DOI: 10.1039/d0sc04347h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/07/2020] [Indexed: 01/19/2023] Open
Abstract
The dodecanuclear coordination cage [Cd12(Lnaph)12(Lmes)4](BF4)24 consists of a set of four triangular, trinuclear helical panels {Cd3(μ-Lnaph)3}6+ (based on ditopic bridging ligands Lnaph), which are connected by four tritopic ligands Lmes. The result is that the four triangular helical panels and the four Lmes-capped triangular faces of the cuboctahedral core form two alternating subsets of the eight triangular faces of the cuboctahedron. Crystallographic investigations revealed that the triangular helicate faces can have 'clockwise' (C) or 'anticlockwise' (A) helicity, and that the helicity of each face can vary independently of the others as they are mechanically separated. This generates a set of three diastereoisomers in which all four cyclic helicate faces in the cuboctahedron have the same chirality (AAAA/CCCC enantiomers with T symmetry; AAAC/CCCA enantiomers with C 3 symmetry; and achiral AACC with S 4 symmetry). This mirrors the known behaviour of many simpler M4L6 tetrahedral cages which can likewise exist as T, C 3 or S 4 isomers according to the sense of tris-chelate chirality around each individual metal centre: but here it is translated onto a much larger scale by the four chiral units being entire trinuclear helicate faces rather than single metal centres. 1H NMR spectroscopy confirms the presence of the three diastereoisomers with their different molecular symmetries in a ratio slightly different from what is expected on purely statistical grounds; and 1H NMR measurements on a non-equilibrium sample (enriched by manual crystal-picking before preparing the solution) showed that the distribution does not change over several weeks in solution, indicating the kinetic inertness of the cage assemblies.
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Affiliation(s)
- Stephen P Argent
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Fiona C Jackson
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Ho Man Chan
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Sam Meyrick
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | | | - Tanya K Ronson
- University Chemistry Laboratory, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Jonathan P Rourke
- School of Chemistry, Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | - Michael D Ward
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
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6
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Wagner HE, Di Martino‐Fumo P, Boden P, Zimmer M, Klopper W, Breher F, Gerhards M. Structural Characterization and Lifetimes of Triple-Stranded Helical Coinage Metal Complexes: Synthesis, Spectroscopy and Quantum Chemical Calculations. Chemistry 2020; 26:10743-10751. [PMID: 32428347 PMCID: PMC7496093 DOI: 10.1002/chem.202001544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/12/2020] [Indexed: 11/11/2022]
Abstract
This work reports on a series of polynuclear complexes containing a trinuclear Cu, Ag, or Au core in combination with the fac-isomer of the metalloligand [Ru(pypzH)3 ](PF6 )2 (pypzH=3-(pyridin-2-yl)pyrazole). These (in case of the Ag and Au containing species) newly synthesized compounds of the general formula [{Ru(pypz)3 }2 M3 ](PF6 ) (2: M=Cu; 3: M=Ag; 4: M=Au) contain triple-stranded helical structures in which two ruthenium moieties are connected by three N-M-N (M=Cu, Ag, Au) bridges. In order to obtain a detailed description of the structure both in the electronic ground and excited states, extensive spectroscopic and quantum chemical calculations are applied. The equilateral coinage metal core triangle in the electronic ground state of 2-4 is distorted in the triplet state. Furthermore, the analyses offer a detailed description of electronic excitations. By using time-resolved IR spectroscopy from the microsecond down to the nanosecond regime, both the vibrational spectra and the lifetime of the lowest lying electronically excited triplet state can be determined. The lifetimes of these almost only non-radiative triplet states of 2-4 show an unusual effect in a way that the Au-containing complex 4 has a lifetime which is by more than a factor of five longer than in case of the Cu complex 2. Thus, the coinage metals have a significant effect on the electronically excited state, which is localized on a pypz ligand coordinated to the Ru atom indicating an unusual cooperative effect between two moieties of the complex.
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Affiliation(s)
- Hanna E. Wagner
- Institute of Inorganic ChemistryKarlsruhe Institute of, Technology (KIT)Engesserstr. 1576131KarlsruheGermany
| | - Patrick Di Martino‐Fumo
- Chemistry Department and Research Center OptimasTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Pit Boden
- Chemistry Department and Research Center OptimasTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Manuel Zimmer
- Chemistry Department and Research Center OptimasTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Willem Klopper
- Institute of Physical ChemistryKarlsruhe Institute of, Technology (KIT)Fritz-Haber-Weg 276131KarlsruheGermany
| | - Frank Breher
- Institute of Inorganic ChemistryKarlsruhe Institute of, Technology (KIT)Engesserstr. 1576131KarlsruheGermany
| | - Markus Gerhards
- Chemistry Department and Research Center OptimasTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
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7
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Fredin LA, Wallenstein J, Sundin E, Jarenmark M, Barbosa de Mattos DF, Persson P, Abrahamsson M. Excited State Dynamics of Bistridentate and Trisbidentate Ru II Complexes of Quinoline-Pyrazole Ligands. Inorg Chem 2019; 58:16354-16363. [PMID: 31800221 DOI: 10.1021/acs.inorgchem.9b01543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three homoleptic ruthenium(II) complexes, [Ru(Q3PzH)3]2+, [Ru(Q1Pz)3]2+, and [Ru(DQPz)2]2+, based on the quinoline-pyrazole ligands, Q3PzH (8-(3-pyrazole)-quinoline), Q1Pz (8-(1-pyrazole)-quinoline), and DQPz (bis(quinolinyl)-1,3-pyrazole), have been spectroscopically and theoretically investigated. Spectral component analysis, transient absorption spectroscopy, density functional theory calculations, and ligand exchange reactions with different chlorination agents reveal that the excited state dynamics for Ru(II) complexes with these biheteroaromatic ligands differ significantly from that of traditional polypyridyl complexes. Despite the high energy and low reorganization energy of the excited state, nonradiative decay dominates even at liquid nitrogen temperatures, where triplet metal-to-ligand-charge-transfer emission quantum yields range from 0.7 to 3.8%, and microsecond excited state lifetimes are observed. In contrast to traditional polypyridyl complexes where ligand exchange is facilitated by expansion of the metal-ligand bonds to stabilize a metal-centered state, photoinduced ligand exchange occurs in the bidentate complexes despite no substantial MC state population, while the tridentate complex is extremely photostable despite an activated decay route, highlighting the versatile photochemistry of nonpolypyridine ligands.
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Affiliation(s)
- Lisa A Fredin
- Theoretical Chemistry Division, Department of Chemistry, Chemical Center , Lund University , Box 124, SE-22100 Lund , Sweden
| | - Joachim Wallenstein
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , SE-41296 Gothenburg , Sweden
| | - Elin Sundin
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , SE-41296 Gothenburg , Sweden
| | - Martin Jarenmark
- Department of Geology , Lund University , Solvegatan 12 , SE-22362 , Lund , Sweden
| | - Deise F Barbosa de Mattos
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , SE-41296 Gothenburg , Sweden
| | - Petter Persson
- Theoretical Chemistry Division, Department of Chemistry, Chemical Center , Lund University , Box 124, SE-22100 Lund , Sweden
| | - Maria Abrahamsson
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , SE-41296 Gothenburg , Sweden
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8
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Sethi S, Jena S, Das PK, Behera N. Synthetic approach and structural diversities of pyridylpyrazole derived late transition metal complexes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Fredin LA, Persson P. Influence of Triplet Surface Properties on Excited-State Deactivation of Expanded Cage Bis(tridentate)Ruthenium(II) Complexes. J Phys Chem A 2019; 123:5293-5299. [DOI: 10.1021/acs.jpca.9b02927] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lisa A. Fredin
- Chemistry Department, Theoretical Chemistry Division, Lund University, Box 124, SE-22100 Lund, Sweden
| | - Petter Persson
- Chemistry Department, Theoretical Chemistry Division, Lund University, Box 124, SE-22100 Lund, Sweden
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10
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Whole microwave syntheses of pyridylpyrazole and of Re and Ru luminescent pyridylpyrazole complexes. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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11
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Bibi N, Guerra RB, Huamaní LESC, Formiga ALB. Crystal structure, electrochemical and spectroscopic investigation of mer-tris-[2-(1 H-imidazol-2-yl-κ N3)pyrimidine-κ N1]ruthenium(II) bis-(hexa-fluorido-phosphate) trihydrate. Acta Crystallogr E Crystallogr Commun 2018; 74:874-877. [PMID: 30002877 PMCID: PMC6038643 DOI: 10.1107/s2056989018007995] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 05/30/2018] [Indexed: 11/17/2022]
Abstract
The crystal structure of the title compound, [Ru(C7H6N4)3](PF6)2·3H2O, a novel RuII complex with the bidentate ligand 2-(1H-imidazol-2-yl)pyrimidine, comprises a complex cation in the meridional form exclusively, with a distorted octa-hedral geometry about the ruthenium(II) cation. The Ru-N bonds involving imidazole N atoms are comparatively shorter than the Ru-N bonds from pyrimidine because of the stronger basicity of the imidazole moiety. The three-dimensional hydrogen-bonded network involves all species in the lattice with water mol-ecules inter-acting with both counter-ions and NH hydrogen atoms from the complex. The supra-molecular structure of the crystal also shows that two units of the complex bind strongly through a mutual N-H⋯N bond. The electronic absorption spectrum of the complex displays an asymmetric band at 421 nm, which might point to the presence of two metal-to-ligand charge-transfer (MLCT) bands. Electrochemical measurements show a quasi-reversible peak referring to the RuIII/RuII reduction at 0.87 V versus Ag/AgCl.
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Affiliation(s)
- Naheed Bibi
- Institute of Chemistry, University of Campinas – UNICAMP, PO Box 6154, 13083-970, Campinas, SP, Brazil
| | - Renan Barrach Guerra
- Institute of Chemistry, University of Campinas – UNICAMP, PO Box 6154, 13083-970, Campinas, SP, Brazil
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12
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Anjana S, Donring S, Sanjib P, Varghese B, Murthy NN. Controlling the oxidation of bis-tridentate cobalt(ii) complexes having bis(2-pyridylalkyl)amines: ligand vs. metal oxidation. Dalton Trans 2017. [DOI: 10.1039/c7dt01792h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Two bis-tridentate chelated cobalt(ii) complexes, which differ in the ligand structure by a methylene group, activate molecular oxygen (O2), and give different oxidation products.
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Affiliation(s)
- S. Anjana
- Department of Chemistry
- IIT Madras
- Chennai 600 036
- India
| | - S. Donring
- Deptartment of Chemistry
- Ewha Womans University
- South Korea
| | - P. Sanjib
- Department of Chemistry
- IIT Bombay
- India
| | - B. Varghese
- Sophisticated Analytical Instruments Facility (SAIF)
- IIT Madras
- India
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13
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August DP, Nichol GS, Lusby PJ. Maximizing Coordination Capsule-Guest Polar Interactions in Apolar Solvents Reveals Significant Binding. Angew Chem Int Ed Engl 2016; 55:15022-15026. [PMID: 27809382 DOI: 10.1002/anie.201608229] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 09/09/2016] [Indexed: 12/19/2022]
Abstract
Guest encapsulation underpins the functional properties of self-assembled capsules yet identifying systems capable of strongly binding small organic molecules in solution remains a challenge. Most coordination capsules rely on the hydrophobic effect to ensure effective solution-phase association. In contrast, we show that using non-interacting anions in apolar solvents can maximize favorable interactions between a cationic Pd2 L4 host and charge-neutral guests resulting in a dramatic increase in binding strength. With quinone-type guests, association constants in excess of 108 m-1 were observed, comparable to the highest previously recorded constant for a metallosupramolecular capsule. Modulation of optoelectronic properties of the guests was also observed, with encapsulation either changing or switching-on luminescence not present in the bulk phase.
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Affiliation(s)
- David P August
- EaStCHEM School of Chemistry, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Gary S Nichol
- EaStCHEM School of Chemistry, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Paul J Lusby
- EaStCHEM School of Chemistry, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
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14
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August DP, Nichol GS, Lusby PJ. Maximizing Coordination Capsule-Guest Polar Interactions in Apolar Solvents Reveals Significant Binding. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608229] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- David P. August
- EaStCHEM School of Chemistry; Joseph Black Building; David Brewster Road Edinburgh EH9 3FJ UK
| | - Gary S. Nichol
- EaStCHEM School of Chemistry; Joseph Black Building; David Brewster Road Edinburgh EH9 3FJ UK
| | - Paul J. Lusby
- EaStCHEM School of Chemistry; Joseph Black Building; David Brewster Road Edinburgh EH9 3FJ UK
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15
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Metherell AJ, Ward MD. Imposing control on self-assembly: rational design and synthesis of a mixed-metal, mixed-ligand coordination cage containing four types of component. Chem Sci 2016; 7:910-915. [PMID: 28791122 PMCID: PMC5530507 DOI: 10.1039/c5sc03526k] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 10/07/2015] [Indexed: 12/24/2022] Open
Abstract
Retrosynthetic analysis of a [M16L24]32+ coordination cage shows how it can be assembled rationally, in a stepwise manner, using a combination of kinetically inert and kinetically labile components. Combination of the components of fac-[Ru(Lph)3](PF6)2, Cd(BF4)2 and Lnaph in the necessary 4 : 12 : 12 stoichiometry afforded crystals of [Ru4Cd12(Lph)12(Lnaph)12]X32 (X = a mono-anion) in which the location of the two types of metal ion [Ru(ii) or Cd(ii)] at specific vertices in the metal-ion array, and the two types of bridging ligand (Lph and Lnaph) along specific edges, is completely controlled by the synthetic strategy. The incorporation of four different types of component at pre-determined positions in a coordination cage superstructure represents a substantial advance in imposing control on the self-assembly of complex metallosupramolecular entities.
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Affiliation(s)
| | - Michael D Ward
- Department of Chemistry , University of Sheffield , Sheffield S3 7HF , UK .
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16
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Metherell AJ, Ward MD. Reprint of “Ru(II)/Ag(I) mixed-metal complexes based on kinetically inert Ru(II) complexes with pendant binding sites as subcomponents”. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.11.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Hedberg Wallenstein J, Fredin LA, Jarenmark M, Abrahamsson M, Persson P. Chemical consequences of pyrazole orientation in RuII complexes of unsymmetric quinoline–pyrazole ligands. Dalton Trans 2016; 45:11723-32. [DOI: 10.1039/c6dt01070a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Chemical consequences of pyrazole orientation in RuII complexes of unsymmetric quinoline–pyrazole ligands.
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Affiliation(s)
| | - Lisa A. Fredin
- Theoretical Chemistry Division
- Department of Chemistry
- Chemical Center
- Lund University
- SE-22100 Lund
| | - Martin Jarenmark
- Centre for Analysis and Synthesis
- Department of Chemistry Chemical Center
- Lund University
- SE-22100 Lund
- Sweden
| | - Maria Abrahamsson
- Department of Chemistry and Chemical Engineering
- Chalmers University of Technology
- SE-41296 Gothenburg
- Sweden
| | - Petter Persson
- Theoretical Chemistry Division
- Department of Chemistry
- Chemical Center
- Lund University
- SE-22100 Lund
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18
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Taylor CGP, Piper JR, Ward MD. Binding of chemical warfare agent simulants as guests in a coordination cage: contributions to binding and a fluorescence-based response. Chem Commun (Camb) 2016; 52:6225-8. [DOI: 10.1039/c6cc02021f] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alkyl phosphonates bind in the cavities of cubic coordination cages via a range of supramolecular interactions and cause a luminescence quenching response.
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19
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Metherell AJ, Ward MD. Geometric isomerism in coordination cages based on tris-chelate vertices: a tool to control both assembly and host/guest chemistry. Dalton Trans 2016; 45:16096-16111. [DOI: 10.1039/c6dt03041f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The presence of both fac and mer tris-chelate units as coordination cage vertices allows control of both cage assembly and guest binding properties.
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Affiliation(s)
| | - Michael D. Ward
- Department of Chemistry
- University of Sheffield
- Sheffield S3 7HF
- UK
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20
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Dabb SL, Fletcher NC. mer and fac isomerism in tris chelate diimine metal complexes. Dalton Trans 2015; 44:4406-22. [PMID: 25600485 DOI: 10.1039/c4dt03535f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this perspective, we highlight the issue of meridional (mer) and facial (fac) orientation of asymmetrical diimines in tris-chelate transition metal complexes. Diimine ligands have long been the workhorse of coordination chemistry, and whilst there are now good strategies to isolate materials where the inherent metal centered chirality is under almost complete control, and systematic methodologies to isolate heteroleptic complexes, the conceptually simple geometrical isomerism has not been widely investigated. In systems where the two donor atoms are significantly different in terms of the σ-donor and π-accepting ability, the fac isomer is likely to be the thermodynamic product. For the diimine complexes with two trigonal planar nitrogen atoms there is much more subtlety to the system, and external factors such as the solvent, lattice packing and the various steric considerations play a delicate role in determining the observed and isolable product. In this article we discuss the possibilities to control the isomeric ratio in labile systems, consider the opportunities to separate inert complexes and discuss the observed differences in their spectroscopic properties. Finally we report on the ligand orientation in supramolecular systems where facial coordination leads to simple regular structures such as helicates and tetrahedra, but the ability of the ligand system to adopt a mer orientation enables self-assembled structures of considerable beauty and complexity.
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Affiliation(s)
- Serin L Dabb
- School of Chemistry and Chemical Engineering, Queen's University of Belfast, David Keir Building, Belfast, Northern Ireland BT9 5AG, UK.
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21
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Wragg AB, Metherell AJ, Cullen W, Ward MD. Stepwise assembly of mixed-metal coordination cages containing both kinetically inert and kinetically labile metal ions: introduction of metal-centred redox and photophysical activity at specific sites. Dalton Trans 2015; 44:17939-49. [PMID: 26406288 DOI: 10.1039/c5dt02957k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Stepwise preparation of the heterometallic octanuclear coordination cages [(M(a))4(M(b))4L12](16+) is reported, in which M(a) = Ru or Os and M(b) = Cd or Co (all in their +2 oxidation state). This requires initial preparation of the kinetically inert mononuclear complexes [(M(a))L3](2+) in which L is a ditopic ligand with two bidentate chelating pyrazolyl-pyridine units: in the complexes [(M(a))L3](2+) one terminus of each ligand is bound to the metal ion, such that the complex has three pendant bidentate sites at which cage assembly can propagate by coordination to additional labile ions M(b) in a separate step. Thus, combination of four [(M(a))L3](2+) units and four [M(b)](2+) ions results in assembly of the complete cages [(M(a))4(M(b))4L12](16+) in which a metal ion lies at each of the eight vertices, and a bridging ligand spans each of the twelve edges, of a cube. The different types of metal ion necessarily alternate around the periphery with each bridging ligand bound to one metal ion of each type. All four cages have been structurally characterised: in the Ru(ii)/Cd(ii) cage (reported in a recent communication) the Ru(ii) and Cd(ii) ions are crystallographically distinct; in the other three cages [Ru(ii)/Co(ii), Os(ii)/Cd(ii) and Os(ii)/Co(ii), reported here] the ions are disordered around the periphery such that every metal site refines as a 50 : 50 mixture of the two metal atom types. The incorporation of Os(ii) units into the cages results in both redox activity [a reversible Os(ii)/Os(iii) couple for all four metal ions simultaneously, at a modest potential] and luminescence [the Os(ii) units have luminescent (3)MLCT excited states which will be good photo-electron donors] being incorporated into the cage superstructure.
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Affiliation(s)
- Ashley B Wragg
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK.
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22
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Metherell AJ, Ward MD. Ru(II)/Ag(I) mixed-metal complexes based on kinetically inert Ru(II) complexes with pendant binding sites as subcomponents. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.01.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Wood DM, Meng W, Ronson TK, Stefankiewicz AR, Sanders JKM, Nitschke JR. Guest-Induced Transformation of a Porphyrin-Edged FeII4L6Capsule into a CuIFeII2L4Fullerene Receptor. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411985] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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24
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Wood DM, Meng W, Ronson TK, Stefankiewicz AR, Sanders JKM, Nitschke JR. Guest-induced transformation of a porphyrin-edged Fe(II)4L6 capsule into a Cu(I)Fe(II)2L4 fullerene receptor. Angew Chem Int Ed Engl 2015; 54:3988-92. [PMID: 25655272 DOI: 10.1002/anie.201411985] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Indexed: 11/09/2022]
Abstract
The combination of a bent diamino(nickel(II) porphyrin) with 2-formylpyridine and Fe(II) yielded an Fe(II) 4 L6 cage. Upon treatment with the fullerenes C60 or C70 , this cage was found to transform into a new host-guest complex incorporating three Fe(II) centers and four porphyrin ligands, in an arrangement that is hypothesized to maximize π interactions between the porphyrin units of the host and the fullerene guest bound within its central cavity. The new complex shows coordinative unsaturation at one of the Fe(II) centers as the result of the incommensurate metal-to-ligand ratio, which enabled the preparation of a heterometallic cone-shaped Cu(I) Fe(II) 2 L4 adduct of C60 or C70 .
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Affiliation(s)
- Daniel M Wood
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
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25
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Boulay A, Deraeve C, Vander Elst L, Leygue N, Maury O, Laurent S, Muller RN, Mestre-Voegtlé B, Picard C. Terpyridine-Based Heteroditopic Ligand for RuIILn3III Metallostar Architectures (Ln = Gd, Eu, Nd, Yb) with MRI/Optical or Dual-Optical Responses. Inorg Chem 2015; 54:1414-25. [DOI: 10.1021/ic502342x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Alexandre Boulay
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France
- Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Céline Deraeve
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France
- Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Luce Vander Elst
- NMR
and Molecular Imaging Laboratory, Department of General, Organic and
Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium
- Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Nadine Leygue
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France
- Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Olivier Maury
- Université de Lyon 1, Laboratoire de Chimie de l’ENS Lyon, CNRS UMR 5182, 46 allée d’Italie, 69364 Lyon, France
| | - Sophie Laurent
- NMR
and Molecular Imaging Laboratory, Department of General, Organic and
Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium
- Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Robert N. Muller
- NMR
and Molecular Imaging Laboratory, Department of General, Organic and
Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium
- Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Béatrice Mestre-Voegtlé
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France
- Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Claude Picard
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France
- Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
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26
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Hiromitsu O, Nakanishi T, Fushimi K, Hasegawa Y. Thermo-stable Lanthanoid Coordination Nanoparticles Composed of Luminescent Eu(III) Complexes and Organic Joint Ligands Using Micelle Techniques in Water. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140202] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Onodera Hiromitsu
- Laser Systems Inc
- Division of Materials Chemistry, Faculty of Engineering, Hokkaido University
| | - Takayuki Nakanishi
- Division of Materials Chemistry, Faculty of Engineering, Hokkaido University
| | - Koji Fushimi
- Division of Materials Chemistry, Faculty of Engineering, Hokkaido University
| | - Yasuchika Hasegawa
- Division of Materials Chemistry, Faculty of Engineering, Hokkaido University
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27
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Jarenmark M, Fredin LA, Hedberg JHJ, Doverbratt I, Persson P, Abrahamsson M. A Homoleptic Trisbidentate Ru(II) Complex of a Novel Bidentate Biheteroaromatic Ligand Based on Quinoline and Pyrazole Groups: Structural, Electrochemical, Photophysical, and Computational Characterization. Inorg Chem 2014; 53:12778-90. [DOI: 10.1021/ic502432c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | - Joachim H. J. Hedberg
- Department of Chemical and
Biological Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | | | | | - Maria Abrahamsson
- Department of Chemical and
Biological Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
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28
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Shankar B, Elumalai P, Deval Sathiyashivan S, Sathiyendiran M. Spheroid Metallocavitands with Eight Calixarene-Shaped Receptors on the Surface. Inorg Chem 2014; 53:10018-20. [DOI: 10.1021/ic5014895] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Palani Elumalai
- Department of Chemistry, University of Delhi, Delhi 110 007, India
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Metherell AJ, Ward MD. Stepwise assembly of an adamantoid Ru₄Ag₆ cage by control of metal coordination geometry at specific sites. Chem Commun (Camb) 2014; 50:10979-82. [PMID: 25096332 DOI: 10.1039/c4cc05421k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The geometrically pure 'complex ligand' fac-[Ru(L(ph))3](2+), in which three pendant bidentate binding sites are located on one face of the complex, reacts with Ag(I) ions to form the adamantoid decanuclear cage [{Ru(L(ph))3}4Ag6](PF6)14 which contains a 6-coordinate Ru(II) ion at each vertex of a large tetrahedron and a 4-coordinate Ag(I) ion along each edge.
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30
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Young MC, Holloway LR, Johnson AM, Hooley RJ. A Supramolecular Sorting Hat: Stereocontrol in Metal-Ligand Self-Assembly by Complementary Hydrogen Bonding. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405242] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Young MC, Holloway LR, Johnson AM, Hooley RJ. A supramolecular sorting hat: stereocontrol in metal-ligand self-assembly by complementary hydrogen bonding. Angew Chem Int Ed Engl 2014; 53:9832-6. [PMID: 25044629 DOI: 10.1002/anie.201405242] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 06/12/2014] [Indexed: 11/05/2022]
Abstract
A combination of self-complementary hydrogen bonding and metal-ligand interactions allows stereocontrol in the self-assembly of prochiral ligand scaffolds. A unique, non-tetrahedral M4L6 structure is observed upon multicomponent self-assembly of 2,7-diaminofluorenol with 2-formylpyridine and Fe(ClO4)2. The stereochemical outcome of the assembly is controlled by self-complementary hydrogen bonding between both individual ligands and a suitably sized counterion as template. This hydrogen-bonding-mediated stereoselective metal-ligand assembly allows the controlled formation of nonsymmetric discrete cage structures from previously unexploited ligand scaffolds.
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Affiliation(s)
- Michael C Young
- University of California Riverside, Department of Chemistry, Riverside, CA 92521 (USA)
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32
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Turega S, Cullen W, Whitehead M, Hunter CA, Ward MD. Mapping the Internal Recognition Surface of an Octanuclear Coordination Cage Using Guest Libraries. J Am Chem Soc 2014; 136:8475-83. [DOI: 10.1021/ja504269m] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Simon Turega
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - William Cullen
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Martina Whitehead
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | | | - Michael D. Ward
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
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33
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Arroyo M, Gómez-Iglesias P, Antón N, García-Rodríguez R, Alegria ECBA, Pombeiro AJL, Miguel D, Villafañe F. Homo- and heteropolymetallic 3-(2-pyridyl)pyrazolate manganese and rhenium complexes. Dalton Trans 2014; 43:4009-20. [DOI: 10.1039/c3dt53439a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteropolymetallic complexes with pyridylpyrazolates bridging Mn and Na or K are tetrametallic and contain bridging pyridylpyrazolates with an unprecedented coordination mode, whereas the Mn/Li complex is bimetallic.
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Affiliation(s)
- Marta Arroyo
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel Delibes
- Universidad de Valladolid
- 47011 Valladolid, Spain
| | - Patricia Gómez-Iglesias
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel Delibes
- Universidad de Valladolid
- 47011 Valladolid, Spain
| | - Noelia Antón
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel Delibes
- Universidad de Valladolid
- 47011 Valladolid, Spain
| | - Raúl García-Rodríguez
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel Delibes
- Universidad de Valladolid
- 47011 Valladolid, Spain
| | - Elisabete C. B. A. Alegria
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa, Portugal
| | - Daniel Miguel
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel Delibes
- Universidad de Valladolid
- 47011 Valladolid, Spain
| | - Fernando Villafañe
- GIR MIOMeT-IU Cinquima-Química Inorgánica
- Facultad de Ciencias
- Campus Miguel Delibes
- Universidad de Valladolid
- 47011 Valladolid, Spain
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Metherell AJ, Ward MD. Stepwise synthesis of a Ru4Cd4 coordination cage using inert and labile subcomponents: introduction of redox activity at specific sites. Chem Commun (Camb) 2014; 50:6330-2. [DOI: 10.1039/c4cc02627f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Combination of four [RuL3]2+ units, each with three pendant binding sites, and four Cd2+ ions affords the redox-active, heteronuclear, cubic cage [Ru4Cd4L12]16+.
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