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Babel L, Baudet K, Hoang TNY, Nozary H, Piguet C. A Rational Approach to Metal Loading of Organic Multi-Site Polymers: Illusion or Reality? Chemistry 2018; 24:5423-5433. [DOI: 10.1002/chem.201705043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Lucille Babel
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Karine Baudet
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Thi Nhu Y. Hoang
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Homayoun Nozary
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Claude Piguet
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
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Baudet K, Guerra S, Piguet C. Chemical Potential of the Solvent: A Crucial Player for Rationalizing Host-Guest Affinities. Chemistry 2017; 23:16787-16798. [DOI: 10.1002/chem.201703184] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Karine Baudet
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Sebastiano Guerra
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
| | - Claude Piguet
- Department of Inorganic, Analytical and Applied Chemistry; University of Geneva; 30 quai E. Ansermet 1211 Geneva 4 Switzerland
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Tsujimoto Y, Kojima T, Hiraoka S. Rate-determining step in the self-assembly process of supramolecular coordination capsules. Chem Sci 2014. [DOI: 10.1039/c4sc01652a] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We present a novel method for investigating the self-assembly process by following the average composition of the fragmentary species.
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Affiliation(s)
- Yuya Tsujimoto
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo, Japan
| | - Tatsuo Kojima
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo, Japan
| | - Shuichi Hiraoka
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo, Japan
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Seidel RW, Oppel IM. μ-2,2′,6,6′-Tetramethyl-4,4′-bipyridine-κ 2N1: N1′-bis[(diethylenetriamine-κ 3N, N′, N′′)palladium(II)] tetranitrate. Acta Crystallogr C 2011; 67:m199-201. [DOI: 10.1107/s0108270111017586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 05/10/2011] [Indexed: 11/10/2022] Open
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5
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Devi U, Brown JRD, Almond A, Webb SJ. Pd(II)-mediated assembly of porphyrin channels in bilayer membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:1448-1456. [PMID: 21174428 DOI: 10.1021/la104152s] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A membrane-spanning bis(meso-3-pyridyl) porphyrin 1 has been synthesized, embedded in EYPC vesicles, and upon Pd(II) addition has been shown to form ionophores that allow the passage of anionic 5/6-carboxyfluorescein through membranes. The geometric matching of bis(meso-3-pyridyl) porphyrin 1 and trans-Pd(II) was designed to give a cyclic porphyrin trimer [PdCl(2)(1)](3). However, solution-phase studies showed that PdCl(2)(PhCN)(2) cross linked 1 into linear oligomers at porphyrin concentrations above 10 mM, although the formation of cyclic species was inferred from studies at concentrations below 2 μM. Fluorescence titrations showed that embedding porphyrin 1 in bilayers greatly reduced its affinity for Pd(II), but the combination of porphyrin 1 and Pd(II) gave an ionophoric species that increased the rate of 5/6-carboxyfluorescein (5/6-CF) transit through the phospholipid bilayer 12-fold. A maximum in the 5/6-CF release rate was observed at a Pd(II) concentration of 4 μM, and the application of a solution-phase binding model to the membrane phase showed that this peak in ionophoric activity corresponded to the greatest extent of porphyrin oligomerization. Further studies suggested these Pd(II)/porphyrin oligomers transported 5/6-CF via a channel mechanism.
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Affiliation(s)
- Usha Devi
- Manchester Interdisciplinary Biocentre, University of Manchester, Manchester, United Kingdom
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Affiliation(s)
- Caleb Bromba
- a Department of Chemistry , University of Victoria , Victoria, Canada
| | - Philippa Carrie
- a Department of Chemistry , University of Victoria , Victoria, Canada
| | | | - Thomas M. Fyles
- a Department of Chemistry , University of Victoria , Victoria, Canada
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Lemonnier JF, Guénée L, Bernardinelli G, Vigier JF, Bocquet B, Piguet C. Planned Failures from the Principle of Maximum Site Occupancy in Lanthanide Helicates. Inorg Chem 2010; 49:1252-65. [DOI: 10.1021/ic902314f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jean-François Lemonnier
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Laure Guénée
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Gérald Bernardinelli
- Laboratory of Crystallography, University of Geneva, 24 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Jean-François Vigier
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Bernard Bocquet
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
| | - Claude Piguet
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland
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Piguet C, Bünzli JCG. Chapter 247 Self-Assembled Lanthanide Helicates. HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS VOLUME 40 2010. [DOI: 10.1016/s0168-1273(10)40007-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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9
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Piguet C. Five thermodynamic describers for addressing serendipity in the self-assembly of polynuclear complexes in solution. Chem Commun (Camb) 2010; 46:6209-31. [DOI: 10.1039/c0cc00811g] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Riis-Johannessen T, Dallaâ
Favera N, Todorova T, Huber S, Gagliardi L, Piguet C. Understanding, Controlling and Programming Cooperativity in Self-Assembled Polynuclear Complexes in Solution. Chemistry 2009; 15:12702-18. [DOI: 10.1002/chem.200900904] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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González-Álvarez A, Frontera A, Ballester P. Thermodynamic Characterization of the Self-Assembly Process of a Three Component Heterobimetallic Bisporphyrin Macrocycle. J Phys Chem B 2009; 113:11479-89. [DOI: 10.1021/jp9053742] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Almudena González-Álvarez
- Catalan Institution for Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010-Barcelona, and Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007-Tarragona, Spain
| | - Antoni Frontera
- Catalan Institution for Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010-Barcelona, and Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007-Tarragona, Spain
| | - Pablo Ballester
- Catalan Institution for Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010-Barcelona, and Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007-Tarragona, Spain
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Zhu S, Moreno KX, Jenkins RM, Walmsley JA. Interactions of 1,5-naphthyridine with Pd(en)Cl2 or [Pd(en)(H2O)2](NO3)2 in aqueous solution. Dalton Trans 2008:6401-8. [PMID: 19002326 PMCID: PMC4084943 DOI: 10.1039/b810487e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nature of the complexes formed in aqueous solution between either Pd(en)Cl2 or [Pd(en)(H2O)2](NO3)2 and 1,5-naphthyridine (1,5-NAP), where en is ethylenediamine, have been investigated by 1-D and 2-D (1)H NMR spectroscopy and potentiometric titration. Above pH 5.0, two major complexes have been identified with the stoichiometries of 2:1 and 1:1 (M:L ratio) as well as small amounts of a 1:2 complex and/or oligomer. The 2:1 complex consisted of a Pd(en)2+ moiety symmetrically bonded to each of the nitrogen atoms of the 1,5-NAP, as indicated by the presence of just three 1H NMR resonances in the aromatic region. The 1:1 complex had six resonances as a result of only one 1,5-NAP nitrogen atom being bonded to a Pd(en)2+ group. At pH<5, the uncomplexed nitrogen of the 1:1 and other singly bonded 1,5-NAP species became protonated and resulted in the formation of a large number of complexes. Job's method plots at pH 6 showed that the 1:1 complex is stable over a large concentration range. Above pH approximately 6 the 1:1 complex can dimerize via deprotonation of a water ligand on the Pd(en)2+ to form an hydoxo-bridged or oxo-bridged species. Evidence for this was observed in the upfield shifts of the resonances as the pH increased. The species distribution curve from potentiometric titrations and the NMR data were in good agreement at concentrations of 1-4 mM. NOESY data indicated that free 1,5-NAP ligand was exchanging with that in the 1:1 complex. In order to interpret the en region of the 1H NMR spectra, the spectra of [Pd(en)(H2O)2](NO3)2 in D2O at various pD were obtained.
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Affiliation(s)
| | - Karlos X. Moreno
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States of America
| | - Roxanne M. Jenkins
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States of America
| | - Judith A. Walmsley
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States of America
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Weilandt T, Troff RW, Saxell H, Rissanen K, Schalley CA. Metallo-supramolecular self-assembly: the case of triangle-square equilibria. Inorg Chem 2008; 47:7588-98. [PMID: 18680283 DOI: 10.1021/ic800334k] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
For the efficient self-assembly of metallo-supramolecular complexes, not only reversibility is required but also two other properties have to be controlled as well: (i) The right binding sites need to be programmed into the building blocks at the appropriate positions. (ii) The building blocks must be rigid enough to support the geometrical arrangement and to avoid the unfavorable entropy effects connected with the conformational fixation of flexible molecules. A series of different bis-pyridyl ligands is reported which self-assemble with (dppp)M(OTf) 2 complexes (dppp = 1,3-bis-(diphenylphosphino)propane; M = Pd (II), Pt (II)) to yield squares and/or triangles as the products. Enthalpic contributions (higher strain in the triangle) and entropic contributions (higher number of triangles from the same building blocks) determine the equilibrium. The effects of concentration, temperature, and solvent properties on the equilibrium have been studied. To characterize the complexes under study, a combination of (1)H, (31)P, and diffusion-ordered NMR spectroscopy, electrospray-ionization Fourier-transform ion-cyclotron-resonance mass spectrometry, and X-ray crystallography is needed. Variable-temperature NMR spectroscopy provides evidence for fast ligand-exchange processes occurring for the Pd complexes, while the Pt complexes exchange ligands much more slowly.
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Affiliation(s)
- Torsten Weilandt
- Institut fur Chemie and Biochemie - Organische Chemie, Freie Universitat Berlin, Germany, Kekule-Institut fur Organische Chemie and Biochemie der Universitat Bonn, Germany
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