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Zhang Y, Lee TS, Petersen JL, Milsmann C. Photophysical Studies of a Zr(IV) Complex with Two Pyrrolide-Based Tetradentate Schiff Base Ligands. Inorg Chem 2024; 63:9002-9013. [PMID: 38700497 DOI: 10.1021/acs.inorgchem.4c00365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
The reaction of two equivalents of N,N'-bis(2-pyrrolylmethylidene)-1,2-phenylenediamine (H2bppda) with tetrabenzylzirconium provided the air- and moisture-stable eight-coordinate complex Zr(bppda)2. Temperature-dependent steady-state and time-resolved emission spectroscopy established weak photoluminescence (ΦPL = 0.4% at 293 K) by a combination of prompt fluorescence and thermally activated delayed fluorescence (TADF) upon visible light excitation at and around room temperature. TADF emission is strongly quenched by 3O2 and shows highly temperature-sensitive emission lifetimes of hundreds of microseconds. The lifetime of the lowest energy singlet excited state, S1, was established by transient absorption spectroscopy and shows rapid deactivation (τ = 142 ps) by prompt fluorescence and intersystem crossing to the triplet state, T1. Time-dependent density functional theory (TD-DFT) calculations predict moderate ligand-to-metal charge transfer (LMCT) contributions of 25-30% for the S1 and T1 states. A comparison of Zr(bppda)2 to related zirconium pyridine dipyrrolide complexes, Zr(PDP)2, revealed important electronic structure changes due to the eight-coordinate ligand environment in Zr(bppda)2, which were correlated to differences in the photophysical properties between the two compound classes.
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Affiliation(s)
- Yu Zhang
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
- Department of Chemistry, Tufts University, Medford, Massachusetts 02144, United States
| | - Tia S Lee
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Jeffrey L Petersen
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Carsten Milsmann
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
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Köhler L, Patzschke M, Schmidt M, Stumpf T, März J. How 5 f Electron Polarisability Drives Covalency and Selectivity in Actinide N-Donor Complexes. Chemistry 2021; 27:18058-18065. [PMID: 34747538 PMCID: PMC9299701 DOI: 10.1002/chem.202102849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Indexed: 01/12/2023]
Abstract
We report a series of isostructural tetravalent actinide (Th, U−Pu) complexes with the N‐donor ligand N,N’‐ethylene‐bis((pyrrole‐2‐yl)methanimine) (H2L, H2pyren). Structural data from SC‐XRD analysis reveal [An(pyren)2] complexes with different An−Nimine versus An−Npyrrolide bond lengths. Quantum chemical calculations elucidated the bonding situation, including differences in the covalent character of the coordinative bonds. A comparison to the intensely studied analogous N,N′‐ethylene‐bis(salicylideneimine) (H2salen)‐based complexes [An(salen)2] displays, on average, almost equal electron sharing of pyren or salen with the AnIV, pointing to a potential ligand‐cage‐driven complex stabilisation. This is shown in the fixed ligand arrangement of pyren and salen in the respective AnIV complexes. The overall bond strength of the pure N‐donor ligand pyren to AnIV (An=Th, U, Np, Pu) is slightly weaker than to salen, with the exception of the PaIV complex, which exhibits extraordinarily high electron sharing of pyren with PaIV. Such an altered ligand preference within the early AnIV series points to a specificity of the 5f1 configuration, which can be explained by polarisation effects of the 5 f electrons, allowing the strongest f electron backbonding from PaIV (5f1) to the N donors of pyren.
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Affiliation(s)
- Luisa Köhler
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Michael Patzschke
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Moritz Schmidt
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Juliane März
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
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Mayhugh JT, Niklas JE, Forbes MG, Gorden JD, Gorden AEV. Pyrrophens: Pyrrole-Based Hexadentate Ligands Tailor-Made for Uranyl (UO 22+) Coordination and Molecular Recognition. Inorg Chem 2020; 59:9560-9568. [PMID: 32590898 DOI: 10.1021/acs.inorgchem.0c00439] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Derivatives of a novel pyrrole-containing Schiff base ligand system (called "pyrrophen") are presented which feature substituted phenylene linkers (R1 = R2 = H (H2L1); R1 = R2 = CH3 (H2L2)) and a binding pocket modeled after macrocyclic species. These ligands bind neutral CH3OH in the solid state through pyrrolic hydrogen-bonding. The interaction of the uranyl cation (UO22+) and H2L1-2 yields planar hexagonal bipyramdial uranyl complexes, while the Cu2+ and Zn2+ complexes were found to self-assemble as dinuclear helicate complexes (M2L2) with H2L1 under identical conditions. The favorable binding of UO22+ over Zn2+ provides insight into the molecular recognition of uranyl over other metal species. Structural features of these complexes are examined with special attention to features of the UO22+ coordination environment which distinguish them from other related salophen and porphyrinoid complexes.
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Affiliation(s)
- Jacob T Mayhugh
- Auburn University, Department of Chemistry and Biochemistry, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - Julie E Niklas
- Auburn University, Department of Chemistry and Biochemistry, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - Madeleine G Forbes
- Auburn University, Department of Chemistry and Biochemistry, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - John D Gorden
- Auburn University, Department of Chemistry and Biochemistry, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - Anne E V Gorden
- Auburn University, Department of Chemistry and Biochemistry, 179 Chemistry Building, Auburn, Alabama 36849, United States
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Abstract
Polytopic ligands have become ubiquitous in coordination chemistry because they grant access to a variety of mono- and polynuclear complexes of transition metals as well as rare-earth and main-group elements. Nitrogen-based ditopic ligands, in which two monoanionic N,N-binding sites are framed within one molecule, are of particular importance and are therefore the primary focus of this review. In detail, bis(amidine)s, bis(guanidine)s, bis(β-diimine)s, bis(aminotroponimine)s, bis(pyrrolimine)s, and miscellaneous bis(N,N-chelating) ligands are reviewed. In addition to the general synthetic protocols, the application of these ligands is discussed along with their coordination chemistry, the multifarious binding modes, and the ability of these ligands to bridge two (or more) metal(loids).
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Affiliation(s)
- Robert Kretschmer
- Junior Professorship Inorganic Chemistry of Catalysis, Institute of Inorganic and Analytical ChemistryFriedrich Schiller University JenaHumboldtstrasse 807743JenaGermany
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
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5
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Yang L, Shan X, Chen Q, Ma JS. Self-assembly of 1,4-bis(pyrrol-2-ylmethyleneamine)butane mediated by Ni(II) and weak intermolecular interactions. Journal of Chemical Research 2019. [DOI: 10.3184/0308234042430395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A complex [NiL] was prepared by the self-assembly of 1,4-bis(pyrrol-2-ylmethyleneamine)butane (H2L) with Ni(OAc)2·2H2O, its structure was elucidated by X-ray analysis and the weak intermolecular interactions play a crucial role in the molecular packing.
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Affiliation(s)
- Lanying Yang
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
| | - Xufeng Shan
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
| | - Qingqi Chen
- BioMarin Pharmaceutical, Inc., 46 Galli Drive, Novato, CA 94949, USA
| | - Jin Shi Ma
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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Rufino-Felipe E, Lopez N, Vengoechea-Gómez FA, Guerrero-Ramírez LG, Muñoz-Hernández MÁ. Ring-opening polymerization ofrac-lactide catalyzed by Al(III) and Zn(II) complexes incorporating Schiff base ligands derived from pyrrole-2-carboxaldehyde. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4315] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ernesto Rufino-Felipe
- Centro de Investigaciones Químicas, IICBA; Universidad Autónoma del Estado de Morelos; Av. Universidad 1001, Col. Chamilpa Cuernavaca Morelos 62209 Mexico
| | - Nazario Lopez
- Centro de Investigaciones Químicas, IICBA; Universidad Autónoma del Estado de Morelos; Av. Universidad 1001, Col. Chamilpa Cuernavaca Morelos 62209 Mexico
| | - Fabio A. Vengoechea-Gómez
- Centro de Investigaciones Químicas, IICBA; Universidad Autónoma del Estado de Morelos; Av. Universidad 1001, Col. Chamilpa Cuernavaca Morelos 62209 Mexico
| | - Luis-Guillermo Guerrero-Ramírez
- Centro Universitario de Ciencias Exactas e Ingenierías, Departamento de Química; Universidad de Guadalajara; Boulevard Marcelino García Barragán 1421 Guadalajara Jalisco 44430 Mexico
| | - Miguel-Ángel Muñoz-Hernández
- Centro de Investigaciones Químicas, IICBA; Universidad Autónoma del Estado de Morelos; Av. Universidad 1001, Col. Chamilpa Cuernavaca Morelos 62209 Mexico
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7
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Bhikraj S, Munro OQ, Akerman MP. An unusual asymmetric pseudomacrocyclic free base ligand and nickel(II) chelate: X-ray crystallographic and DFT studies. Polyhedron 2017; 124:22-9. [DOI: 10.1016/j.poly.2016.12.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Wadhwa NR, Hughes NC, Hachem JA, Mezei G. Metal-templated synthesis of intertwined, functionalized strands as precursors to molecularly woven materials. RSC Adv 2016. [DOI: 10.1039/c5ra25584h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A novel approach toward molecularly woven materials is presented, based on metal-templated precursors containing intertwined strands with functional endings.
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Affiliation(s)
| | - Neil C. Hughes
- Department of Chemistry
- Western Michigan University
- Kalamazoo
- USA
| | | | - Gellert Mezei
- Department of Chemistry
- Western Michigan University
- Kalamazoo
- USA
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9
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Akerman MP, Chatturgoon T, Munro OQ. An X-ray crystallographic and DFT study of bis(pyrrolide-imine) nickel(II) Schiff base chelates. Inorganica Chim Acta 2014; 421:292-9. [DOI: 10.1016/j.ica.2014.06.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Justyniak I, Kornowicz A, Prochowicz D, Sokołowski K, Lewiński J. Synthesis and Structure of an Arylmanganese(II) 8-Hydroxyquinolinate Tetranuclear Cluster. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Komine N, Buell RW, Chen CH, Hui AK, Pink M, Caulton KG. Probing the Steric and Electronic Characteristics of a New Bis-Pyrrolide Pincer Ligand. Inorg Chem 2014; 53:1361-9. [DOI: 10.1021/ic402120r] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Nobuyuki Komine
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - René W. Buell
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Chun-Hsing Chen
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Alice K. Hui
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Maren Pink
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Kenneth G. Caulton
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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12
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Akerman MP, Chiazzari VA. An X-ray crystallographic and DFT study of the complementary hydrogen bonding of bidentate pyrrolide-imine Schiff base ligands. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.10.051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Tsvetkov NP, Chen CH, Andino JG, Lord RL, Pink M, Buell RW, Caulton KG. Synthesis and Oxidative Reactivity of 2,2′-Pyridylpyrrolide Complexes of Ni(II). Inorg Chem 2013; 52:9511-21. [DOI: 10.1021/ic4011746] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Nikolay P. Tsvetkov
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
| | - Chun-Hsing Chen
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
| | - José G. Andino
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
| | - Richard L. Lord
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
| | - Maren Pink
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
| | - René W. Buell
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
| | - Kenneth G. Caulton
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405-7102, United
States
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14
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Abstract
The title compound, C14H16N2, is a pyrrole-2-carbaldimine ligand that shows an E conformation at the imine double bond. The dihedral angle between the rings is 78.3 (1)°. In the crystal, pairs of molecules form centrosymmetric dimers [graph-set descriptor is presumably R22(10)] via N—H⋯N hydrogen bonds between the pyrrole N—H group and the imine N atom of a neighbouring molecule.
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Affiliation(s)
- Wolfgang Imhof
- University Koblenz-Landau, Institute for Integrated Natural Sciences, Universitätsstrasse 1, 56070 Koblenz, Germany
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15
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Flores JA, Andino JG, Tsvetkov NP, Pink M, Wolfe RJ, Head AR, Lichtenberger DL, Massa J, Caulton KG. Assessment of the Electronic Structure of 2,2′-Pyridylpyrrolides as Ligands. Inorg Chem 2011; 50:8121-31. [DOI: 10.1021/ic2005503] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jaime A. Flores
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - José G. Andino
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Nikolay P. Tsvetkov
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Maren Pink
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Robert J. Wolfe
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Ashley R. Head
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - Dennis L. Lichtenberger
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - Joseph Massa
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Kenneth G. Caulton
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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16
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Mu J, Shi X, Li Y. Ethylene homopolymerizaton and copolymerizaton by vanadium(III) complexes containing tridentate or tetradentate iminopyrrolyl ligands. ACTA ACUST UNITED AC 2011; 49:2700-8. [DOI: 10.1002/pola.24702] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Robertazzi A, Galstyan A, Knapp EW. Can oxidation states and the protonation pattern of oxomanganese complexes be recognized from their structures? CrystEngComm 2011. [DOI: 10.1039/c1ce05880k] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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18
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Yang G, Liu M, Li X, Li J, Ma J. Syntheses and crystal structures of nickel(II), copper(II), and zinc(II) complexes with a biphenyl-bridged bis(pyrrole-2-yl-methyleneamine) ligand. J COORD CHEM 2009. [DOI: 10.1080/00958970903118061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Guoqiang Yang
- a Key Laboratory of Photochemistry, Chinese Academy of Sciences, Institute of Chemistry , No. 2, Bei Yi Jie, Zhong Guan Cun, Beijing, 100190, P. R. China
| | - Min Liu
- a Key Laboratory of Photochemistry, Chinese Academy of Sciences, Institute of Chemistry , No. 2, Bei Yi Jie, Zhong Guan Cun, Beijing, 100190, P. R. China
| | - Xiuping Li
- b Department of Chemistry , Beijing National Laboratory for Molecular Sciences , Beijing, 100190, China
| | - Juan Li
- b Department of Chemistry , Beijing National Laboratory for Molecular Sciences , Beijing, 100190, China
| | - Jinshi Ma
- b Department of Chemistry , Beijing National Laboratory for Molecular Sciences , Beijing, 100190, China
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Wu JC, Liu SX, Keene TD, Neels A, Mereacre V, Powell AK, Decurtins S. Coordination Chemistry of a π-Extended, Rigid and Redox-Active Tetrathiafulvalene-Fused Schiff-Base Ligand. Inorg Chem 2008; 47:3452-9. [DOI: 10.1021/ic800138x] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Jin-Cai Wu
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
| | - Shi-Xia Liu
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
| | - Tony D. Keene
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
| | - Antonia Neels
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
| | - Valeriu Mereacre
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
| | - Annie K. Powell
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
| | - Silvio Decurtins
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland, and Institut für Anorganische Chemie, Universität Karlsruhe, Engesser Strasse 15, Geb. 30.45, D-76128 Karlsruhe, Germany
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20
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Givaja G, Volpe M, Leeland JW, Edwards MA, Young TK, Darby SB, Reid SD, Blake AJ, Wilson C, Wolowska J, McInnes EJL, Schröder M, Love JB. Design and Synthesis of Binucleating Macrocyclic Clefts Derived from Schiff-Base Calixpyrroles. Chemistry 2007; 13:3707-23. [PMID: 17245783 DOI: 10.1002/chem.200600989] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The syntheses, characterisation and complexation reactions of a series of binucleating Schiff-base calixpyrrole macrocycles are described. The acid-templated [2+2] condensations between meso-disubstituted diformyldipyrromethanes and o-phenylenediamines generate the Schiff-base pyrrolic macrocycles H(4)L(1) to H(4)L(6) upon basic workup. The single-crystal X-ray structures of both H(4)L(3).2 EtOH and H(4)L(6).H2O confirm that [2+2] cyclisation has occurred, with either EtOH or H2O hydrogen-bonded within the macrocyclic cleft. A series of complexation reactions generate the dipalladium [Pd2(L)] (L=L(1) to L(5)), dinickel [Ni2(L(1))] and dicopper [Cu2(L)] (L=L(1) to L(3)) complexes. All of these complexes have been structurally characterised in the solid state and are found to adopt wedged structures that are enforced by the rigidity of the aryl backbone to give a cleft reminiscent of the structures of Pacman porphyrins. The binuclear nickel complexes [Ni2(mu-OMe)2Cl2(HOMe)2(H(4)L(1))] and [Ni2(mu-OH)2Cl2(HOMe)(H(4)L(5))] have also been prepared, although in these cases the solid-state structures show that the macrocyclic ligand remains protonated at the pyrrolic nitrogen atoms, and the Ni(II) cations are therefore co-ordinated by the imine nitrogen atoms only to give an open conformation for the complex. The dicopper complex [Cu2(L(3))] was crystallised in the presence of pyridine to form the adduct [Cu2(py)(L(3))], in which, in the solid state, the pyridine ligand is bound within the binuclear molecular cleft. Reaction between H(4)L(1) and [Mn(thf){N(SiMe(3))2}2] results in clean formation of the dimanganese complex [Mn2(L(1))], which, upon crystallisation, formed the mixed-valent complex [Mn2(mu-OH)(L(1))] in which the hydroxo ligand bridges the metal centres within the molecular cleft.
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Affiliation(s)
- Gonzalo Givaja
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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21
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Affiliation(s)
- Tabitha E Wood
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4J3, Canada
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Wang Y, Fu H, Shen F, Sheng X, Peng A, Gu Z, Ma H, Ma JS, Yao J. Distinct M and P Helical Complexes of H2O and Metal Ions NiII, CuII, and ZnII with Enantiomerically Pure Chiral Bis(pyrrol-2-ylmethyleneamine)cyclohexane Ligands: Crystal Structures and Circular Dichroism Properties. Inorg Chem 2007; 46:3548-56. [PMID: 17394311 DOI: 10.1021/ic062316z] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantiomerically pure bis-bidentate ligands of bis(pyrrol-2-ylmethyleneamine)cyclohexane [H2(LR,S)] are easily synthesized from condensation of the pure R,R and S,S enantiomers of the 1,2-diaminecyclohexane spacer with 2 equiv of pyrrole-2-carbaldehyde. The coordination of [H2(LR,S)] with a H2O molecule and metal ions NiII, CuII, and ZnII gives rise to distinct helical structures and crystal packing motifs: homochiral and enantiopure infinite single-helical polymeric chains of [(H2(LR,S).H2O)n] via hydrogen bonds, mononuclear single helices of [NiII(LR,S)] and [CuII(LR,S)], and a double-stranded dinuclear helicate of [ZnII2(LR,S)2], respectively. The helical structures for all metal complexes in the solid state still remain in the solution. Remarkably, chiral ligands of [H2(LR)] and [H2(LS)] predetermine the chirality of the helices and helicates, i.e., P left-handedness and M right-handedness, respectively. The structural changes of these complexes induced by different coordinators are also characterized by circular dichroism (CD) and absorption spectra in both the solid state and solution. Analysis of CD spectra, with aids of absolute determination of single-crystal X-ray diffraction structures, reveals both intraligand and interligand chromophore couplings. For the potential applications of these complexes, other experiments such as magnetism, photoluminescence, and nonlinear optical properties have also been investigated.
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Affiliation(s)
- Yaobing Wang
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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Munro OQ, Joubert SD, Grimmer CD. Molecular recognition: preorganization of a bis(pyrrole) Schiff base derivative for tight dimerization by hydrogen bonding. Chemistry 2006; 12:7987-99. [PMID: 16960914 DOI: 10.1002/chem.200600403] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Multiple techniques have been used to delineate the self-assembly of a bis(pyrrole) Schiff base derivative (compound 4, C(16)H(14)N(4)), which forms an unusual dimer through complementary N-H...N=C hydrogen bonds between twisted, C2-symmetric monomer units. The asymmetric unit of the crystal structure comprises one and a half dimer units, with one dimer exhibiting approximate D2 point-group symmetry and the other exact D2 symmetry (space group C2/c). The dimers pack into columns whose axes are collinear with the a axis of the unit cell. The columns assemble into discrete layers with two distinct types of hydrogen-sized voids residing between the layers. Despite the promising architecture of the voids within the lattice of 4, the absence of genuine channels to interconnect the voids precludes the uptake of hydrogen gas, even at elevated pressures (10 bar). AM1 calculations of the structure of dimeric 4 indicate that self-recognition through hydrogen bonding depends primarily on favorable electrostatic interactions. The potential-energy surface for monomeric 4 mapped by counter-rotation of an adjacent pair of C=C-N=C torsion angles indicates that the X-ray structures of the four monomeric units are global minima with highly nonplanar conformations that are preorganized for self-recognition by hydrogen bonding. The in vacuo enthalpy of association for the dimer was calculated to be significantly exergonic (DeltaG(assoc)=-21.9 kJ mol(-1), 298 K) and in excellent agreement with that determined by 1H NMR spectroscopy in CDCl3 (DeltaG(assoc)=-16.6(4) kJ mol(-1), 298 K). Using population and bond order analyses, in conjunction with the conformation dependence of the frontier MO energies, we have been able to show that pi-electron delocalization is only marginally diminished in the nonplanar conformers of 4 and that the electronic structures of the constituent monomers of the dimer are well mixed.
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Affiliation(s)
- Orde Q Munro
- School of Chemistry, University of KwaZulu-Natal, Private Bag X01, Scottsville 3209, Pietermaritzburg, South Africa.
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Reid SD, Blake AJ, Wilson C, Love JB. Syntheses and Structures of Dinuclear Double-Stranded Helicates of Divalent Manganese, Iron, Cobalt, and Zinc. Inorg Chem 2005; 45:636-43. [PMID: 16411698 DOI: 10.1021/ic051433b] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The syntheses and solid-state and solution structures of a series of unusually volatile, charge neutral, [4 + 4] double-stranded helical complexes of divalent manganese, iron, cobalt, and zinc are described. Deprotonation of the N4-donor iminopyrrole ligand H2L by KH cleanly generates the salt K2(THF)2L, which displays both sigma and pi interactions between K and iminopyrrolyl fragments in the X-ray crystal structure. Transamination, salt elimination, and protonolysis reactions were found to be versatile and, in general, high-yielding routes to the dinuclear double helicates [M2(L)2] (M = Mn, Fe, Co, and Zn). These compounds are isomorphous in the solid state by X-ray crystallography and adopt dinuclear cleft motifs as a result of pi stacking between opposing iminopyrrolyl fragments. This motif was also observed in the solution structures of [Fe2(L)2] and [Zn2(L)2] below 230 and 200 K, respectively (DeltaG++ = approximately 46 and 39.0 kJ mol(-1), respectively).
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Affiliation(s)
- Stuart D Reid
- School of Chemistry, University Park, University of Nottingham, Nottingham NG7 2RD, U.K
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Yang L, Shan X, Chen Q, Wang Z, Ma J. The First Silver(I) Side-Onη2-Coordination Network Formed by Self-Assembly of Bis(pyrrol-2-ylmethylene)hydrazine. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300638] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yang L, Chen Q, Li Y, Xiong S, Li G, Ma J. Self‐Assembly of Bis(pyrrol‐2‐ylmethyleneamine) Ligands with Cu
II
Controlled by Bridging [−(CH
2
)
n
−] Spacers and Weak Intermolecular C−H···Cu Hydrogen Bonding. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300639] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lanying Yang
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China, Fax: (internat.) +86‐10‐8261‐7315
| | - Qingqi Chen
- BioMarin Pharmaceutical, Inc., 46 Galli Drive, Novato, CA 94949, USA
| | - Yan Li
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China, Fax: (internat.) +86‐10‐8261‐7315
| | - Shaoxiang Xiong
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China, Fax: (internat.) +86‐10‐8261‐7315
| | - Genpei Li
- College of Chemistry and Molecular Engineering Peking University, Beijing 100871, China
| | - Jin Shi Ma
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China, Fax: (internat.) +86‐10‐8261‐7315
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Liang L, Lee P, Lan W, Hung C. Coordination chemistry of a multidentate pyrrolylaldiminate ligand. X-ray crystal structure of double-helical bis-μ-[N,N′-ethylenedi(5-tert-butyl-pyrrol-2-ylaldiminate)]-dimagnesium. J Organomet Chem 2004; 689:947-52. [DOI: 10.1016/j.jorganchem.2003.12.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Wu Z, Yang G, Chen Q, Liu J, Yang S, Ma JS. One-pot synthesis and self-assembly of double stranded helical metal complexes. INORG CHEM COMMUN 2004; 7:249-52. [DOI: 10.1016/j.inoche.2003.11.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
New bimetallic mu-oxo diferric complexes of several previously reported calix[4]pyrrole Schiff base macrocycles are described. The synthesis of a new member of this class of macrocycles is also reported; it was prepared via an acid-catalyzed condensation between 1,9-bisformyl-5,5-dipropyldipyrromethane and o-phenylenediamine. Reactions of the free base macrocycles or their bis-HCl salts with Fe(II) mesitylene, followed by air oxidation, gave the binuclear mu-oxo bis-Fe(III) compounds 6-10 in moderate yield. X-ray crystallography data reveal two different coordination environments for the Fe-O-Fe subunit in 6-10 that it is suggested can be controlled by altering the reaction conditions. Structural properties of these metalated pyrrolic macrocycles are also compared to those of mu-oxo diferric porphyrins and mu-oxo diferric texaphyrin. Complexes 6-10 exhibit two distinct types of M-N bonds that are similar in length to the bonds observed in metallotexaphyrin complexes. However, the electronics of the present systems are very different from those of texaphyrins and porphyrins in that no delocalized bonding patterns are observed within the ligands as a whole.
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Affiliation(s)
- Jacqueline M Veauthier
- Department of Chemistry and Biochemistry, 1 University Station--A5300, The University of Texas at Austin, Austin, Texas 78712-0165, USA
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Rice CR, Baylies CJ, Harding LP, Jeffery JC, Paul RL, Ward MD. Cadmium-containing pyridyl–thiazole complexes: crystal structures and solution behaviour of mononuclear, dinuclear double helicate and dinuclear triple helicate complexes. Polyhedron 2003. [DOI: 10.1016/s0277-5387(02)01406-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reid SD, Blake AJ, Köckenberger W, Wilson C, Love JB. Double-stranded, [4 + 4] helicates of Fe(ii) and Mn(ii) supported by an extended dipyrrolide ligand. Dalton Trans 2003. [DOI: 10.1039/b311093a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bacchi A, Carcelli M, Gabba L, Ianelli S, Pelagatti P, Pelizzi G, Rogolino D. Syntheses, characterization and X-ray structure of palladium(II) and nickel(II) complexes of tetradentate pyrrole containing ligands. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01077-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Vallina AT, Stoeckli-evans H. Coordination chemistry of a new imine-ether ligand, N,N′-bis(2-pyridylmethylene)-2,2′-(ethylenedioxy)bis(ethylamine): mono-helical and single-helical-strand coordination modes identified by X-ray crystallography. Polyhedron 2002; 21:1177-87. [DOI: 10.1016/s0277-5387(02)01015-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Affiliation(s)
- M Albrecht
- Institut für Organische Chemie, Universität Karlsruhe, Richard-Willstätter-Allee, D-76131 Karlsruhe, Germany
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