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Anis-Ul-Haque KM, Woodward CE, Day AI, Wallace L. Interaction of the Large Host Q[10] with Metal Polypyridyl Complexes: Binding Modes and Effects on Luminescence. Inorg Chem 2020; 59:3942-3953. [PMID: 32125142 DOI: 10.1021/acs.inorgchem.9b03603] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Aqueous solution state host-guest systems have been studied, comprising the large host cucurbit[10]uril with luminescent cationic tris(polypyridyl) (PP) metal complexes [Ru(PP)3]2+ and [Ir(PP)3]3+. All complexes bind strongly with the host, with the overall complex charge and size having a minor effect on affinity but influencing the association dynamics and contribution from higher-order (1:2) host-guest species. The 1:2 species contributes more significantly to the binding equilibrium in the case of [Ru(phen)3]2+. The effect of the host upon emission is highly variable and depends on the electronic structure of the guest. The metal-to-ligand charge transfer (MLCT) emission of [Ru(PP)3]2+ is strongly quenched, in contrast to the large enhancements seen previously for MLCT emission of iridium cyclometalated complexes, while the ligand-centered emission of [Ir(PP)3]3+ is little affected. The mechanisms of quenching and enhancement are discussed, together with the implications for the design of larger supramolecular assemblies based on these archetypal emitters.
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Affiliation(s)
- K M Anis-Ul-Haque
- School of Science, The University of New South Wales, Canberra, ACT 2600, Australia
| | - Clifford E Woodward
- School of Science, The University of New South Wales, Canberra, ACT 2600, Australia
| | - Anthony I Day
- School of Science, The University of New South Wales, Canberra, ACT 2600, Australia
| | - Lynne Wallace
- School of Science, The University of New South Wales, Canberra, ACT 2600, Australia
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Goto H, Hayakawa T, Furutachi K, Sugimoto H, Inoue S. Planar-chiral metal complexes comprised of square-planar metal and achiral tetradentate ligands: design, optical resolution, and thermodynamics. Inorg Chem 2012; 51:4134-42. [PMID: 22435891 DOI: 10.1021/ic2024742] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Planar-chiral palladium complexes {[[N,N'-[1,4-butanediylbis(oxy-7,1-naphthalenediyl)]bis(2-pyridinecarboxamidato)](2-)-κN(1),κN(1)',κN(2),κN(2)']palladium (PdL(4)) and [[2,2'-[1,4-butanediylbis[[(oxy-7,1-naphthalenediyl)imino]methyl]]dipyrrolato](2-)-κN(1),κN(1)',κN(2),κN(2)']palladium (PdL(5))} were synthesized from achiral tetradentate ligands N,N'-[1,4-butanediylbis(oxy-7,1-naphthalenediyl)]bis(2-pyridinecarboxamide) (H(2)L(4)) and N,N'-bis[(1H-pyrrol-2-yl)methylidene]-7,7'-(1,4-butanediyldioxy)bis(1-naphthalenamine) (H(2)L(5)) bearing two dissymmetric bidentate units at both ends and a Pd(II) ion, respectively. The palladium complexes were crystallized in the monoclinic space group P2(1)/n with the unit cell parameters a = 16.5464(6) Å, b = 11.3534(4) Å, c = 17.6697(7) Å, β = 115.5300(10)°, and Z = 4 for PdL(4) and a = 17.2271(8) Å, b = 10.1016(5) Å, c = 17.9361(9) Å, β = 105.6310(10)°, and Z = 4 for PdL(5). The planar-chiral structures of PdL(4) and PdL(5) were confirmed by single-crystal X-ray analyses, resulting in the fact that the crystals were racemic mixtures. The racemic mixtures were successfully resolved by using chiral high-performance liquid-chromatography techniques. Racemizations of the complexes were found to be drastically dependent on the arrangement of the charged or uncharged metal-binding N atoms of the ligands.
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Affiliation(s)
- Hidetoshi Goto
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 12-1 Ichigaya-funagawara, Shinjuku, Tokyo 162-0826, Japan
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Pazderski L, Pawlak T, Sitkowski J, Kozerski L, Szłyk E. (1)H NMR assignment corrections and (1)H, (13)C, (15)N NMR coordination shifts structural correlations in Fe(II), Ru(II) and Os(II) cationic complexes with 2,2'-bipyridine and 1,10-phenanthroline. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2010; 48:450-457. [PMID: 20474023 DOI: 10.1002/mrc.2600] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
(1)H, (13)C and (15)N NMR studies of iron(II), ruthenium(II) and osmium(II) tris-chelated cationic complexes with 2,2'-bipyridine and 1,10-phenanthroline of the general formula [M(LL)(3)](2+) (M = Fe, Ru, Os; LL = bpy, phen) were performed. Inconsistent literature (1)H signal assignments were corrected. Significant shielding of nitrogen-adjacent protons [H(6) in bpy, H(2) in phen] and metal-bonded nitrogens was observed, being enhanced in the series Ru(II) --> Os(II) --> Fe(II) for (1)H, Fe(II) --> Ru(II) --> Os(II) for (15)N and bpy --> phen for both nuclei. The carbons are deshielded, the effect increasing in the order Ru(II) --> Os(II) --> Fe(II).
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Affiliation(s)
- Leszek Pazderski
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland.
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Han MJ, Chen YM, Wang KZ. Ruthenium(ii) complexes of 6-hydroxydipyrido[3,2-a:2′,3′-c]phenazine: self-association, and concentration-dependent acid–base and DNA-binding properties. NEW J CHEM 2008. [DOI: 10.1039/b711759k] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sato H, Hiroe Y, Tamura K, Yamagishi A. Orientation tuning of a polypyridyl Ru(II) complex immobilized on a clay surface toward chiral discrimination. J Phys Chem B 2007; 109:18935-41. [PMID: 16853438 DOI: 10.1021/jp053541p] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The present work reports an attempt to elucidate a stereoselective energy-transfer system by immobilizing a chiral metal complex on a clay surface. The metal complex used was [Ru(bpy)2L(i)]2+ with L1 = bpy (2,2'-bipyridine), L2 = 4,4'-diundecyl-2,2'-bipyridine, and L3 = 5,5'-diundecyl-2,2'-bipyridine. The adsorption structure of [Ru(bpy)2L(i)]2+ was studied by means of electric dichroism measurements on an aqueous dispersion of a colloidal clay. It was found that the molecular orientation of the adsorbed Ru(II) complex was affected remarkably by the positions of the alkyl chains on the bpy ligand; that is, the angle of the 3-fold or pseudo-3-fold symmetry axis of the Ru(II) complex with respect to the surface normal was obtained to be 24 degrees, 30 degrees, and 52 degrees for i = 1, 2, and 3, respectively. The efficiency of the energy-transfer was determined by photoluminescence quenching measurements between the adsorbed Ru(II) complex and [Ru(acac)3] (acac = acetylacetonate) in solution. As a result, stereoselectivity appeared most for the case of [Ru(bpy)2L3]2+ in which its two helically twisted bpy ligands were projected in an outward direction.
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Affiliation(s)
- Hisako Sato
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
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Miyamura K, Satoh K, Gohshi Y. Aggregation of Alkyl Substituted Salchxn Complexes Studied by 1H-N.M.R. J COORD CHEM 2007. [DOI: 10.1080/00958978808080699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kazuo Miyamura
- a Department of Industrial Chemistry, Faculty of Engineering , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo , 113 , JAPAN
| | - Keiki Satoh
- a Department of Industrial Chemistry, Faculty of Engineering , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo , 113 , JAPAN
| | - Yohichi Gohshi
- a Department of Industrial Chemistry, Faculty of Engineering , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo , 113 , JAPAN
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Nord G. Some Properties of 2,2′ -Bipyridine, 1,10-Phenanthroline and Their Metal Complexes. COMMENT INORG CHEM 2006. [DOI: 10.1080/02603598508072261] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Barnard PJ, Vagg RS. A spectroscopic investigation of the self-association and DNA binding properties of a series of ternary ruthenium(II) complexes. J Inorg Biochem 2005; 99:1009-17. [PMID: 15833323 DOI: 10.1016/j.jinorgbio.2005.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Revised: 01/05/2005] [Accepted: 01/14/2005] [Indexed: 11/25/2022]
Abstract
Six ruthenium(II) complexes of the general form cis-alpha-[Ru(N4-tetradentate)(N2-bidentate)]Cl2 have been synthesized from the two related tetradentate ligands 1,6-di(2'-pyridyl)-2,5-dimethyl-2,5-diazahexane (picenMe2) and 1,6-di(2'-pyridyl)-2,5-dibenzyl-2,5-diazahexane (picenBz2) and the bidentate ligands 2,2'-bipyridine (bipy), 1,10-phenanthroline (phen) and dipyrido[3,2-f:2'3'-h]quinoxaline (dpq). Synthetic intermediate species of the general form cis-alpha-[Ru(II)(N4-tetradentate)(DMSO)Cl][PF6] were isolated. The N4-tetradentate ligand picenMe2 formed only the cis-alpha stereoisomer, while picenBz2 formed both the cis-alpha and cis-beta stereoisomers. These latter stereoisomers were resolved by fractional crystallisation. Dimer self-association constants, K(D), were estimated from the concentration dependence of the 1H NMR shifts for some of these complexes in aqueous solutions at 25 degrees C. The values of K(D) ranged from 0.6 to 7.9 M(-1) and a relationship was observed between the aromatic surface area of the bidentate component and the degree to which self-association occurred, whereby a greater level of self-association correlates with a larger surface area for the bidentate ligand. Some of these complexes demonstrate an ability to bind to DNA that is consistent with intercalation of the bidentate molecular component between the base pairs of the DNA molecule. Using calf-thymus DNA, the equilibrium binding constants, K(B), were determined for some of the complexes using intrinsic methods and these ranged from 3.32 to 5.11 M(-1), the intercalating abilities of the different bidentate ligands being in the order dp q > phen > bipy. This relationship between aromatic surface area of the bidentate ligand and the degree of DNA binding activity is the same as that observed in the self-association study.
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Affiliation(s)
- Peter J Barnard
- School of Chemistry, Macquarie University, Sydney, NSW 2109, Australia.
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Nagai T, Tomizawa H, Sugahara K, Takeda Y, Ishida K. Contribution of a local electric dipole moment to the hydrophilic nature of [Ru(phen)2(1,5,6,10-tetraazaphenanthrene)]2+ complex in aqueous solutions. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(98)00729-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Aldrich-Wright JR, Vagg RS, Williams PA. Design of chiral picen-based metal complexes for molecular recognition of α-aminoacids and nucleic acids. Coord Chem Rev 1997. [DOI: 10.1016/s0010-8545(97)00048-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Yokoyama H, Shinozaki K, Hattori S, Miyazaki F. Hydrophobic Hydration Structures of Tris(1,10-phenanthroline)metal and Tris(2,2′-bipyridine)metal Complex Ions and Effect of the Ionic Charge. X-Ray Diffraction Study with Isomorphous Substitution. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.2357] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Schmidt J, Strasser J, Yersin H. Determination of Relaxation Paths in the Manifold of Excited States of Pt(2-thpy)2 and [Ru(bpy)3]2+ by Time-Resolved Excitation and Emission. Inorg Chem 1997. [DOI: 10.1021/ic960565p] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Josef Schmidt
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Johann Strasser
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Hartmut Yersin
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
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Characterization of excited electronic and vibronic states of platinum metal compounds with chelate ligands by highly frequency-resolved and time-resolved spectra. Top Curr Chem (Cham) 1997. [DOI: 10.1007/bfb0119213] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Lappin A, Marusak RA. Stereoselectivity in electron transfer reactions involving metal ion complexes. Coord Chem Rev 1991. [DOI: 10.1016/0010-8545(91)80004-w] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tominaga T, Maruyama T, Koshiba T, Yamamoto Y. Interactions between the Tris(1,10-phenanthroline)iron(II) Cation and Anionic Surfactants: Diffusion and Conductance Studies. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1989. [DOI: 10.1246/bcsj.62.1745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Masuda Y, Yokoyama H. Concentration Dependence of the Rotational Motion of Tetraphenylborate and Tetraphenylarsonium Ions in Aqueous Solution. Effect of Their Self-Association. CHEM LETT 1988. [DOI: 10.1246/cl.1988.1769] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tominaga T, Matsumoto S, Koshiba T, Yamamoto Y. Tracer Diffusion of Tris(1,10-phenanthroline)iron(II) Cation in Aqueous Sodium Dodecyl Sulfate Solutions. Strong Premicellar Interactions. CHEM LETT 1988. [DOI: 10.1246/cl.1988.1427] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yamagishi A. Optical Resolution and Asymmetric Syntheses by use of Adsorption on Clay Minerals. J COORD CHEM 1987. [DOI: 10.1080/00958978708081202] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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