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New N4-Donor Ligands as Supramolecular Guests for DNA and RNA: Synthesis, Structural Characterization, In Silico, Spectrophotometric and Antimicrobial Studies. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28010400. [PMID: 36615615 PMCID: PMC9823393 DOI: 10.3390/molecules28010400] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 01/05/2023]
Abstract
The present work reports the synthesis of new N4-donor compounds carrying p-xylyl spacers in their structure. Different Schiff base aliphatic N-donors were obtained synthetically and subsequently evaluated for their ability to interact with two models of nucleic acids: calf-thymus DNA (CT-DNA) and the RNA from yeast Saccharomyces cerevisiae (herein simply indicated as RNA). In more detail, by condensing p-xylylenediamine and a series of aldehydes, we obtained the following Schiff base ligands: 2-thiazolecarboxaldehyde (L1), pyridine-2-carboxaldehyde (L2), 5-methylisoxazole-3-carboxaldehyde (L3), 1-methyl-2-imidazolecarboxaldehyde (L4), and quinoline-2-carboxaldehyde (L5). The structural characterisation of the ligands L1-L5 (X-ray, 1H NMR, 13C NMR, elemental analysis) and of the coordination polymers {[CuL1]PF6}n (herein referred to as Polymer1) and {[AgL1]BF4}n, (herein referred to as Polymer2, X-ray, 1H NMR, ESI-MS) is herein described in detail. The single crystal X-ray structures of complexes Polymer1 and Polymer2 were also investigated, leading to the description of one-dimensional coordination polymers. The spectroscopic and in silico evaluation of the most promising compounds as DNA and RNA binders, as well as the study of the influence of the 1D supramolecular polymers Polymer1 and Polymer2 on the proliferation of Escherichia coli bacteria, were performed in view of their nucleic acid-modulating and antimicrobial applications. Spectroscopic measurements (UV-Vis) combined with molecular docking calculations suggest that the thiazolecarboxaldehyde derivative L1 is able to bind CT-DNA with a mechanism different from intercalation involving the thiazole ring in the molecular recognition and shows a binding affinity with DNA higher than RNA. Finally, Polymer2 was shown to slow down the proliferation of bacteria much more effectively than the free Ag(I) salt.
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2
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Koller S, Klein P, Reinhardt K, Ochmann L, Seitz A, Jandl C, Pöthig A, Hintermann L. New Access Routes to Privileged and Chiral Ligands for Transition‐Metal Catalyzed Hydrogen Autotransfer (Borrowing Hydrogen), Dehydrogenative Condensation, and Alkene Isomerization Reactions. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Sebastian Koller
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Philippe Klein
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Katja Reinhardt
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Lukas Ochmann
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Antonia Seitz
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Christian Jandl
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Alexander Pöthig
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Lukas Hintermann
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
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3
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Synthesis, structural and physicochemical properties of a series of manganese(II) complexes with a novel N5 tripodal-amidate ligand and their potential use as water oxidation catalysts. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Kuznetsov ML. Strength of the [Z-I···Hal] - and [Z-Hal···I] - Halogen Bonds: Electron Density Properties and Halogen Bond Length as Estimators of Interaction Energy. Molecules 2021; 26:2083. [PMID: 33916483 PMCID: PMC8038634 DOI: 10.3390/molecules26072083] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 11/29/2022] Open
Abstract
Bond energy is the main characteristic of chemical bonds in general and of non-covalent interactions in particular. Simple methods of express estimates of the interaction energy, Eint, using relationships between Eint and a property which is easily accessible from experiment is of great importance for the characterization of non-covalent interactions. In this work, practically important relationships between Eint and electron density, its Laplacian, curvature, potential, kinetic, and total energy densities at the bond critical point as well as bond length were derived for the structures of the [Z-I···Hal]- and [Z-Hal···I]- types bearing halogen bonds and involving iodine as interacting atom(s) (totally 412 structures). The mean absolute deviations for the correlations found were 2.06-4.76 kcal/mol.
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Affiliation(s)
- Maxim L. Kuznetsov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal; ; Tel.: +351-218-419-236
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russia
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5
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Solid-State Structural Transformation and Photoluminescence Properties of Supramolecular Coordination Compounds. Symmetry (Basel) 2021. [DOI: 10.3390/sym13010112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The combination of strong coordination bonds and hydrogen bonding interactions were used to generate a series of supramolecular coordination materials (SCMs), which was achieved by reacting a bis-pyridyl amide ligand, namely N-(4-pyridyl)nicotinamide (4PNA) with copper(II), zinc(II), and cadmium(II) benzoates. The SCMs were structurally characterized using X-ray diffraction and the key intermolecular interactions were identified via Hirshfeld surface analysis. The role of solvent molecules on the supramolecular architecture was analyzed by synthesizing the SCMs in different solvents/solvent mixtures. A solvent-mediated solid-state structural transformation was observed in copper(II) SCMs and we were able to isolate the intermediate form of the crystal-to-crystal transformation process. The luminescence experiments revealed that complexation enhanced the fluorescence properties of 4PNA in the zinc(II) and cadmium(II) SCMs, but a reverse phenomenon was observed in the copper(II) SCMs. This work demonstrated the tuning of supramolecular assembly in coordination compounds as a function of solvents for generating SCMs with diverse properties.
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6
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Lange JL, Davey PRWJ, Ma MT, White JM, Morgenstern A, Bruchertseifer F, Blower PJ, Paterson BM. An octadentate bis(semicarbazone) macrocycle: a potential chelator for lead and bismuth radiopharmaceuticals. Dalton Trans 2020; 49:14962-14974. [PMID: 33079111 DOI: 10.1039/d0dt02673e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A variant of 1,4,7,10-tetraazacyclododecane (cyclen) bearing two semicarbazone pendant groups has been prepared. The octadentate ligand forms complexes with Bi3+ and Pb2+. X-ray crystallography showed that the neutral ligand provides an eight-coordinate environment for both metal ions and intermolecular hydrogen bond interactions have influenced the coordination environments of both complexes in the solid state. NMR spectroscopy revealed a fluxional environment for both complexes. The ligand was radiolabeled with the α-emitting radioactive isotope 213Bi3+, which is used in systemic targeted radiotherapy. The resulting complex was stable in serum for at least 90 min (two decay half-lives). The Pb2+ complex has reasonably fast kinetics of formation (t1/2 = 20 min) at 25 °C and pH 7.4. The Bi3+ and Pb2+ complexes show kinetic stability in 1.2 M HCl (half-lives of 214 min and 47 min, respectively). This is the first description of a macrocycle bearing semicarbazone pendant groups and its utility in coordinating main group metals, specifically those with radiotherapeutic potential.
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Affiliation(s)
- Jaclyn L Lange
- School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, London SE1 7EH, UK
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7
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Gusev A, Braga E, Baluda Y, Kiskin M, Kryukova M, Karaush-Karmazin N, Baryshnikov G, Kuklin A, Minaev B, Ågren H, Linert W. Structure and tuneable luminescence in polymeric zinc compounds based on 3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114768] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Jana NC, Brandão P, Frontera A, Panja A. A facile biomimetic catalytic activity through hydrogen atom abstraction by the secondary coordination sphere in manganese(III) complexes. Dalton Trans 2020; 49:14216-14230. [PMID: 33025999 DOI: 10.1039/d0dt02431g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
This paper describes the synthesis and structural characterization of four new manganese(iii) complexes (1-4) derived from N3O donor Schiff base ligands and their biomimetic catalytic activities related to catechol oxidase and phenoxazinone synthase. X-ray crystallography reveals that the Schiff bases coordinate the metal centre in a tridentate fashion, leaving the pendant tertiary amine nitrogen atom either protonated or free to balance the charge of the system, and these pendant triamines participate in strong hydrogen bonding interactions in the solid state. The hydrogen bonding ability of the pendant triamines at the second coordination sphere plays a crucial role in the substrate recognition and the stability of the complex-substrate intermediates. The effect of substitution at the phenolate ring towards the redox potential of the metal centre and the catalytic activity of these complexes has been observed. Detailed kinetic studies further disclose the deuterium kinetic isotope effect in which the transfer of the proton along the hydrogen bond from the substrates to the pendant triamine group at the secondary coordination sphere occurs at the key step in the catalytic reaction. The present reactivity nicely resembles the biochemical reactivities in the natural system in which a concerted electron and proton transfer to different species is usually observed. Remarkably, although some sort of influence of the secondary coordination sphere on catalytic activity has been reported mimicking the function of these metalloenzymes, such a direct participation of the secondary coordination sphere, particularly in modelling phenoxazinone synthase, has not been observed to date.
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Affiliation(s)
- Narayan Ch Jana
- Department of Chemistry, Panskura Banamali College, Panskura RS, WB 721152, India.
| | - Paula Brandão
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears, Crta de Valldemossa, km 7.5, 07122 Palma de Mallorca, Baleares, Spain
| | - Anangamohan Panja
- Department of Chemistry, Panskura Banamali College, Panskura RS, WB 721152, India. and Department of Chemistry, Gokhale Memorial Girls' College, 1/1 Harish Mukherjee Road, Kolkata-700020, India
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9
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Kuznetsov ML. Relationships between Interaction Energy and Electron Density Properties for Homo Halogen Bonds of the [(A) nY-X···X-Z(B) m] Type (X = Cl, Br, I). Molecules 2019; 24:E2733. [PMID: 31357615 PMCID: PMC6695802 DOI: 10.3390/molecules24152733] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/16/2019] [Accepted: 07/25/2019] [Indexed: 01/31/2023] Open
Abstract
Relationships between interaction energy (Eint) and electron density properties at the X···X bond critical point or the d(X···X) distance were established for the large set of structures [(A)nY-X···X-Z(B)m] bearing the halogen bonds Cl···Cl, Br···Br, and I···I (640 structures in total). The best estimator of Eint is the kinetic energy density (Gb), which reasonably approximates the whole set of the structures as -Eint = 0.128Gb2 - 0.82Gb + 1.66 (R2 = 0.91, mean absolute deviation 0.39 kcal/mol) and demonstrates low dispersion. The potential and kinetic energy densities, electron density, and the d(X···X) distance behave similarly as estimators of Eint for the individual series Cl···Cl, Br···Br, and I···I. A number of the Eint(property) correlations are recommended for the practical application in the express estimates of the strength of the homo-halogen bonds.
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Affiliation(s)
- Maxim L Kuznetsov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal.
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10
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Rahman AB, Imafuku H, Miyazawa Y, Kafle A, Sakai H, Saga Y, Aoki S. Catalytic Hydrolysis of Phosphate Monoester by Supramolecular Phosphatases Formed from a Monoalkylated Dizinc(II) Complex, Cyclic Diimide Units, and Copper(II) in Two-Phase Solvent System. Inorg Chem 2019; 58:5603-5616. [PMID: 30969761 DOI: 10.1021/acs.inorgchem.8b03586] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Design and synthesis of enzyme mimic with programmed molecular interaction among several building blocks including metal complexes and metal chelators is of intellectual and practical significance. The preparation of artificial enzymes that mimic the natural enzymes such as hydrolases, phosphatases, etc. remains a great challenge in the field of supramolecular chemistry. Herein we report on the design and synthesis of asymmetric (nonsymmetric) supermolecules by the 2:2:2 self-assembly of an amphiphilic zinc(II)-cyclen complex containing a 2,2'-bipyridyl linker and one long alkyl chain (Zn2L3), barbital analogues, and Cu2+ as model compounds of an enzyme alkaline phosphatase that catalyzes the hydrolysis of phosphate monoesters such as mono(4-nitrophenyl)phosphate at neutral pH in two-phase solvent system (H2O/CHCl3) in pH 7.4 and 37 °C. Hydrolytic activity of these complexes was found to be catalytic, and their catalytic turnover numbers are 3-4. The mechanistic studies based on the UV/vis and emission spectra of the H2O and CHCl3 phases of the reaction mixtures suggest that the hydrophilicity/hydrophobicity balance of the supramolecular catalysts is an important factor for catalytic activity.
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11
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Rajabimoghadam K, Darwish Y, Bashir U, Pitman D, Eichelberger S, Siegler MA, Garcia-Bosch I. Tunable intramolecular multicenter H-bonding interactions in first-row metal complexes bearing bidentate redox-active ligands. J COORD CHEM 2019; 72:1346-1357. [PMID: 34113052 DOI: 10.1080/00958972.2019.1624728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
In this research article, we report the synthesis and structural characterization of a family of first-row metal complexes bearing redox-active ligands with tunable H-bonding donors. We observed that these coordination complexes can adopt three different geometries and that they are stabilized by intramolecular multicenter H-bonding interactions, which are systematically modified by changing the metal ion (Co, Ni, Cu, Zn), the ligand scaffold (variations in the diamine and ureanyl substituents used) and the solvent of crystallization.
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Affiliation(s)
| | - Yousef Darwish
- Department of Chemistry, Southern Methodist University, Dallas, TX, USA
| | - Umyeena Bashir
- Department of Chemistry, Southern Methodist University, Dallas, TX, USA
| | - Dylan Pitman
- Department of Chemistry, Southern Methodist University, Dallas, TX, USA
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12
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Rajabimoghadam K, Darwish Y, Bashir U, Pitman D, Eichelberger S, Siegler MA, Swart M, Garcia-Bosch I. Catalytic Aerobic Oxidation of Alcohols by Copper Complexes Bearing Redox-Active Ligands with Tunable H-Bonding Groups. J Am Chem Soc 2018; 140:16625-16634. [PMID: 30400740 DOI: 10.1021/jacs.8b08748] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this research article, we describe the structure, spectroscopy, and reactivity of a family of copper complexes bearing bidentate redox-active ligands that contain H-bonding donor groups. Single-crystal X-ray crystallography shows that these tetracoordinate complexes are stabilized by intramolecular H-bonding interactions between the two ligand scaffolds. Interestingly, the Cu complexes undergo multiple reversible oxidation-reduction processes associated with the metal ion (CuI, CuII, CuIII) and/or the o-phenyldiamido ligand (L2-, L•-, L). Moreover, some of the CuII complexes catalyze the aerobic oxidation of alcohols to aldehydes (or ketones) at room temperature. Our extensive mechanistic analysis suggests that the dehydrogenation of alcohols occurs via an unusual reaction pathway for galactose oxidase model systems, in which O2 reduction occurs concurrently with substrate oxidation.
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Affiliation(s)
| | - Yousef Darwish
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Umyeena Bashir
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Dylan Pitman
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Sidney Eichelberger
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Maxime A Siegler
- Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Marcel Swart
- ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Spain.,IQCC , University of Girona , Campus Montilivi (Ciències) , Girona , Spain
| | - Isaac Garcia-Bosch
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
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13
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Sutradhar D, Chowdhury H, Saha NC, Ghosh BK. Syntheses, characterization, crystalline architectures and luminescence of two halidomercury(II) compounds containing a bidentate (N,O) chelator: variation in nuclearities and superstructures by varying halides. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1546-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Ai Y, Ng M, Hong EY, Chan AK, Wei Z, Li Y, Yam VW. Solvent‐Induced and Temperature‐Promoted Aggregation of Bipyridine Platinum(II) Triangular Metallacycles and Their Near‐Infrared Emissive Behaviors. Chemistry 2018; 24:11611-11618. [DOI: 10.1002/chem.201802499] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/19/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Yeye Ai
- Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong) and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong Hong Kong
| | - Maggie Ng
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong) and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong Hong Kong
| | - Eugene Yau‐Hin Hong
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong) and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong Hong Kong
| | - Alan Kwun‐Wa Chan
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong) and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong Hong Kong
| | - Zhang‐Wen Wei
- Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
| | - Yongguang Li
- Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
| | - Vivian Wing‐Wah Yam
- Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong) and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong Hong Kong
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15
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Wang A, Fan R, Dong Y, Chen W, Song Y, Wang P, Hao S, Liu Z, Yang Y. (E)-4-Methyl-N-((quinolin-2-yl)ethylidene)aniline as ligand for IIB supramolecular complexes: synthesis, structure, aggregation-induced emission enhancement and application in PMMA-doped hybrid material. Dalton Trans 2018; 46:71-85. [PMID: 27897300 DOI: 10.1039/c6dt03853k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Judicious structural design employing 2-quinolinecarboxaldehyde and 4-methylaniline was used to generate the Schiff base ligand (E)-4-methyl-N-((quinolin-2-yl)ethylidene)aniline (L). Five IIB complexes, namely, [ZnLCl2] (1), [ZnL(NO3)2] (2), [ZnL(OAc)2]3 (3), [CdL(OAc)2]3 (4), and [HgLCl2] (5) have been synthesized based on L. Single-crystal X-ray diffraction analysis indicates that complexes 1, 3 and 4 exhibit 3D networks, whereas 2 and 5 form 2D layers and 1D chains, respectively. TD-DFT calculations show a good correlation with the UV-vis absorption assigned to π → π* intraligand transitions. Furthermore, complexes 1-5 displayed strong greenish luminescent emissions (518-524 nm) in the aggregate state but weak emissions in solution (aggregation-induced emission enhancement), which may be due to the existence of C-HCl/O hydrogen bonding and ππ stacking interactions, resulting in restriction of intramolecular rotation (RIR). Variable-concentration 1H NMR studies suggested that the aggregates undergo intramolecular changes in conformation due to intermolecular interactions. Moreover, the emission intensity and lifetime exhibited obvious increases induced by mechanical grinding and temperature reduction, which were also attributed to AIEE properties. Subsequently, complex 1 was incorporated into poly(methyl methacrylate) (PMMA), whereby 1-PMMA exhibited enhanced emission intensity (20-fold increase in comparison with that of 1), which offers opportunities for use in plastic greenhouses to increase leaf photosynthesis.
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Affiliation(s)
- Ani Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Ruiqing Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Yuwei Dong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Wei Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Yang Song
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Ping Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Sue Hao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Zhigang Liu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Yulin Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
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16
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Wang A, Fan R, Wang P, Fang R, Hao S, Zhou X, Zheng X, Yang Y. Research on the Mechanism of Aggregation-Induced Emission through Supramolecular Metal–Organic Frameworks with Mechanoluminescent Properties and Application in Press-Jet Printing. Inorg Chem 2017; 56:12881-12892. [DOI: 10.1021/acs.inorgchem.7b01687] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ani Wang
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Ruiqing Fan
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Ping Wang
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Ru Fang
- Department of Mathematics, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Sue Hao
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Xuesong Zhou
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Xubin Zheng
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Yulin Yang
- MIIT Key Laboratory
of Critical Materials Technology for New Energy Conversion and Storage,
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
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17
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Hazlehurst RJ, Hendriks SW, Boyle PD, Blacquiere JM. Ligand Dynamics and Aerobic Allylic Oxidation with Bifunctional Ni(NHC) Complexes. ChemistrySelect 2017. [DOI: 10.1002/slct.201701609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Richard J. Hazlehurst
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
| | - Scott W.E. Hendriks
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
| | - Paul D. Boyle
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
| | - Johanna M. Blacquiere
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
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18
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Liu Q, Zhao X, Hu Z, Zhao Z, Wang H. Synthesis and structural studies of N-heterocyclic carbene Ag(I) and Hg(II) complexes and recognition of dihydrogen phosphate anion. Sci Rep 2017; 7:7534. [PMID: 28790367 PMCID: PMC5548890 DOI: 10.1038/s41598-017-07961-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 07/03/2017] [Indexed: 01/22/2023] Open
Abstract
Bis-benzimidazolium salt (S)-2,2'-bis[2″-(N-Et-benzimidazoliumyl)ethoxy]-1,1'-binaphthyl hexafluorophosphate [(S)-L1H2]·(PF6)2 and bis-imidazolium salts (S)-2,2'-bis[2″-(N-R-imidazoliumyl)ethoxy]-1,1'-binaphthyl hexafluorophosphate [(S)-L2H2]·(PF6)2 and [(S)-L3H2]·(PF6)2 (R = ethyl or benzyl), as well as their five N-heterocyclic carbene Hg(II) and Ag(I) complexes such as [(S)-L1Hg(HgBr4)] (1), [(S)-L2Hg(HgBr4)] (2), [(S)-L2Hg(HgI4)] (3), {[(S)-L2Ag](PF6)}n (4) and [(S)-L3Ag](PF6) (5) have been prepared and characterized. Each of complexes 1-3 consists of two rings (one 6-membered ring and one 11-membered ring), in which the oxygen atom in the ligand participates in coordination with Hg(II) ion. In complex 4, 1D helical polymeric chain is formed via biscarbene ligand (S)-L2 and Ag(I) ion. A 15-membered macrometallocycle is constructed through a ligand (S)-L3 and a Ag(I) ion in complex 5. Additionally, the selective recognition of H2PO4- using complex 5 as a receptor was investigated on the basis of fluorescence and UV/vis spectroscopic titrations. The results indicate that complex 5 can distinguish effectively H2PO4- from other anions.
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Affiliation(s)
- Qingxiang Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; Tianjin Key Laboratory of Structure and Performance for Functional Molecules; College of Chemistry, Tianjin Normal University, Tianjin, 300387, China.
| | - Xiaoqiang Zhao
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; Tianjin Key Laboratory of Structure and Performance for Functional Molecules; College of Chemistry, Tianjin Normal University, Tianjin, 300387, China
| | - Zeliang Hu
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; Tianjin Key Laboratory of Structure and Performance for Functional Molecules; College of Chemistry, Tianjin Normal University, Tianjin, 300387, China
| | - Zhixiang Zhao
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; Tianjin Key Laboratory of Structure and Performance for Functional Molecules; College of Chemistry, Tianjin Normal University, Tianjin, 300387, China
| | - Hong Wang
- Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; Tianjin Key Laboratory of Structure and Performance for Functional Molecules; College of Chemistry, Tianjin Normal University, Tianjin, 300387, China
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19
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Dong YW, Wang P, Fan RQ, Chen W, Wang AN, Yang YL. Different conjugated system Cd(II)/Hg(II) Schiff base complexes: syntheses, supramolecular metal−organic frameworks, luminescent properties and DFT study. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1333113] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yu-Wei Dong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - Ping Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - Rui-Qing Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - Wei Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - A-Ni Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - Yu-Lin Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
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20
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Adhikary J, Chakraborty P, Samanta S, Zangrando E, Ghosh S, Das D. Thiocyanate mediated structural diversity in phenol based "end-off" compartmental ligand complexes of group 12 metal ions: Studies on their photophysical properties and phosphatase like activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 178:114-124. [PMID: 28171815 DOI: 10.1016/j.saa.2017.01.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/30/2016] [Accepted: 01/22/2017] [Indexed: 06/06/2023]
Abstract
The reaction of a pentadentate compartmental ligand LH, namely 4-tert-Butyl-2,6-bis-[(2-pyridin-2-yl-ethylimino)-methyl]-phenol, with group 12 metal ions (ZnII, CdII, HgII) followed by addition of NaSCN afforded one discrete dinuclear complex [Zn2(L)(SCN)3](1), and two polymeric 1D species [Cd2.5(L)(SCN)3(AcO)]n (2) and [Hg2(L)(SCN)3]n (3). All the complexes have been structurally characterized by single crystal X-ray diffraction. The crystal structure of the complexes reveals different coordination modes of thiocyanate anion that affect the different topology detected in the compounds: the anions are μ1-NCS and μ1,1-NCS connected in complex 1, while μ1,3-NCS bridging mode is observed in 2, and μ1-SCN and μ1,3-NCS in 3. The polymeric Hg complex of the bicompartmental ligand system here reported is unprecedented. Detail study of their photophysical properties including the phosphorescence spectra at 77K has been done. Phosphatase like activity of all the three complexes has been performed in DMSO-H2O medium and their activity follows the order of 1>2>>3.
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Affiliation(s)
- Jaydeep Adhikary
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India; Department of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Prateeti Chakraborty
- Department of Chemistry, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh 201306, India
| | - Sugata Samanta
- Department of Chemistry, Presidency University, Kolkata 700073, India
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Sanjib Ghosh
- The School of Science, Adamas University, Barasat, West Bengal, India.
| | - Debasis Das
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India.
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21
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Guillo P, Daran J, Manoury E, Poli R. Synthesis and Characterization of First Row Metal Complexes Derived from a Pyridinophane Ligand Functionalized by Fluoroalcohol. ChemistrySelect 2017. [DOI: 10.1002/slct.201700404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Pascal Guillo
- Université de ToulouseInstitut Universitaire de Technologie Paul Sabatier-Département de Chimie Av. Georges Pompidou, BP 20258 Castres Cedex F- 81104 France
- CNRS, LCC (Laboratoire de Chimie de Coordination)Université de Toulouse, UPS, INPT 205, route de Narbonne Toulouse F- 31077 France
| | - Jean‐Claude Daran
- CNRS, LCC (Laboratoire de Chimie de Coordination)Université de Toulouse, UPS, INPT 205, route de Narbonne Toulouse F- 31077 France
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination)Université de Toulouse, UPS, INPT 205, route de Narbonne Toulouse F- 31077 France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination)Université de Toulouse, UPS, INPT 205, route de Narbonne Toulouse F- 31077 France
- Institut Universitaire de France 103 bd Saint-Michel Paris 75005 France
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22
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Fetisov EO, Gloriozov IP, Nechaev MS, Kahlal S, Saillard JY, Oprunenko YF. Thermally induced inter-ring haptotropic rearrangements in π-complexes of molybdenum with nitrogen containing polyaromatic heterocycles: A DFT study. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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23
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Jones JR, Ziller JW, Borovik AS. Modulating the Primary and Secondary Coordination Spheres within a Series of Co II-OH Complexes. Inorg Chem 2017; 56:1112-1120. [PMID: 28094522 DOI: 10.1021/acs.inorgchem.6b01956] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The interplay between the primary and secondary coordination spheres is crucial to determining the properties of transition metal complexes. To examine these effects, a series of trigonal bipyramidal Co-OH complexes have been prepared with tripodal ligands that control both coordination spheres. The ligands contain a combination of either urea or sulfonamide groups that control the primary coordination sphere through anionic donors in the trigonal plane and the secondary coordination sphere through intramolecular hydrogen bonds. Variations in the anion donor strengths were evaluated using electronic absorbance spectroscopy and a qualitative ligand field analysis to find that deprotonated urea donors are stronger field ligands than deprotonated sulfonamides. Structural variations were found in the CoII-O bond lengths that range from 1.953(4) to 2.051(3) Å; this range in bond lengths were attributed to the differences in the intramolecular hydrogen bonds that surround the hydroxido ligand. A similar trend was observed between the hydrogen bonding networks and the vibrations of the O-H bonds. Attempts to isolate the corresponding CoIII-OH complexes were hampered by their instability at room temperature.
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Affiliation(s)
- Jason R Jones
- Department of Chemistry, University of California-Irvine , 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| | - Joseph W Ziller
- Department of Chemistry, University of California-Irvine , 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| | - A S Borovik
- Department of Chemistry, University of California-Irvine , 1102 Natural Sciences II, Irvine, California 92697-2025, United States
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24
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Dong YW, Fan RQ, Chen W, Zhang HJ, Song Y, Du X, Wang P, Wei LG, Yang YL. Different conjugated system Zn(ii) Schiff base complexes: supramolecular structure, luminescent properties, and applications in the PMMA-doped hybrid materials. Dalton Trans 2017; 46:1266-1276. [DOI: 10.1039/c6dt04159k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Five Zn(ii) complexes with different conjugated systems were synthesized. Zn3 was incorporated into PMMA, creating a high performance material.
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Affiliation(s)
- Yu-Wei Dong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Rui-Qing Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Wei Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Hui-Jie Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Yang Song
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Xi Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Ping Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Li-Guo Wei
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Yu-Lin Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
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25
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Khan FST, Pandey AK, Rath SP. Remarkable Anion-Dependent Spin-State Switching in Diiron(III) μ-Hydroxo Bisporphyrins: What Role do Counterions Play? Chemistry 2016; 22:16124-16137. [PMID: 27682429 DOI: 10.1002/chem.201603163] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Indexed: 12/20/2022]
Abstract
Addition of 2,4,6-trinitrophenol (HTNP) to an ethene-bridged diiron(III) μ-oxo bisporphyrin (1) in CH2 Cl2 initially leads to the formation of diiron(III) μ-hydroxo bisporphyrin (2⋅TNP) with a phenolate counterion that, after further addition of HTNP or dissolution in a nonpolar solvent, converts to a diiron(III) complex with axial phenoxide coordination (3⋅(TNP)2 ). The progress of the reaction from μ-oxo to μ-hydroxo to axially ligated complex has been monitored in solution by using 1 H NMR spectroscopy because their signals appear in three different and distinct spectral regions. The X-ray structure of 2⋅TNP revealed that the nearly planar TNP counterion fits perfectly within the bisporphyrin cavity to form a strong hydrogen bond with the μ-hydroxo group, which thus stabilizes the two equivalent iron centers. In contrast, such counterions as I5 , I3 , BF4 , SbF6 , and PF6 are found to be tightly associated with one of the porphyrin rings and, therefore, stabilize two different spin states of iron in one molecule. A spectroscopic investigation of 2⋅TNP has revealed the presence of two equivalent iron centers with a high-spin state (S=5/2) in the solid state that converts to intermediate spin (S=3/2) in solution. An extensive computational study by using a range of DFT methods was performed on 2⋅TNP and 2+ , and clearly supports the experimentally observed spin flip triggered by hydrogen-bonding interactions. The counterion is shown to perturb the spin-state ordering through, for example, hydrogen-bonding interactions, switched positions between counterion and axial ligand, ion-pair interactions, and charge polarization. The present investigation thus provides a clear rationalization of the unusual counterion-specific spin states observed in the μ-hydroxo bisporphyrins that have so far remained the most outstanding issue.
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Affiliation(s)
| | - Anjani Kumar Pandey
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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26
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Pairas GN, Tsoungas PG. H-Bond: Τhe Chemistry-Biology H-Bridge. ChemistrySelect 2016; 1:4520-4532. [PMID: 32328512 PMCID: PMC7169486 DOI: 10.1002/slct.201600770] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 07/29/2016] [Indexed: 12/19/2022]
Abstract
H-bonding, as a non covalent stabilizing interaction of diverse nature, has a central role in the structure, function and dynamics of chemical and biological processes, pivotal to molecular recognition and eventually to drug design. Types of conventional and non conventional (H-H, dihydrogen, H- π, CH- π, anti- , proton coordination and H-S) H-bonding interactions are discussed as well as features emerging from their interplay, such as cooperativity (σ- and π-) effects and allostery. Its utility in many applications is described. Catalysis, proton and electron transfer processes in various materials or supramolecular architectures of preorganized hosts for guest binding, are front-line technology. The H-bond-related concept of proton transfer (PT) addresses energy issues or deciphering the mechanism of many natural and synthetic processes. PT is also of paramount importance in the functions of cells and is assisted by large complex proteins embedded in membranes. Both intermolecular and intramolecular PT in H-bonded systems has received attention, theoretically and experimentally, using prototype molecules. It is found in rearrangement reactions, protein functions, and enzyme reactions or across proton channels and pumps. Investigations on the competition between intra- and intermolecular H bonding are discussed. Of particular interest is the H-bond furcation, a common phenomenon in protein-ligand binding. Multiple H-bonding (H-bond furcation) is observed in supramolecular structures.
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Affiliation(s)
- George N. Pairas
- Department of PharmacyLaboratory of Medicinal ChemistryUniversity of PatrasGR-265 04PatrasGreece
| | - Petros G. Tsoungas
- Laboratory of BiochemistryHellenic Pasteur Institute127 Vas. Sofias Ave.GR-115 21AthensGreece
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27
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“Scorpionate-like” complexes that are held together by hydrogen bonds: Crystallographic and spectroscopic studies of (3-NH(t-butyl)-5-methyl-pyrazole) MX2 (M = Zn, Ni, Co, Mn; n= 3, 4; X = Cl, Br). Polyhedron 2016. [DOI: 10.1016/j.poly.2015.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Dong YW, Fan RQ, Wang XM, Wang P, Zhang HJ, Wei LG, Song Y, Du X, Chen W, Yang YL. Topological Evolution in Mercury(II) Schiff Base Complexes Tuned through Alkyl Substitution - Synthesis, Solid-State Structures, and Aggregation-Induced Emission Properties. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600231] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yu-Wei Dong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Rui-Qing Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Xin-Ming Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Ping Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Hui-Jie Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Li-Guo Wei
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Yang Song
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Xi Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Wei Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
| | - Yu-Lin Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage; School of Chemistry and Chemical Engineering; Harbin Institute of Technology; 92, Xidazhi Street Nangang District 150001 Harbin P. R. China
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29
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Dahl EW, Szymczak NK. Hydrogen Bonds Dictate the Coordination Geometry of Copper: Characterization of a Square-Planar Copper(I) Complex. Angew Chem Int Ed Engl 2016; 55:3101-5. [PMID: 26822857 PMCID: PMC4804195 DOI: 10.1002/anie.201511527] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Indexed: 12/31/2022]
Abstract
6,6''-Bis(2,4,6-trimethylanilido)terpyridine (H2Tpy(NMes)) was prepared as a rigid, tridentate pincer ligand containing pendent anilines as hydrogen bond donor groups in the secondary coordination sphere. The coordination geometry of (H2 Tpy(NMes))copper(I)-halide (Cl, Br and I) complexes is dictated by the strength of the NH-halide hydrogen bond. The Cu(I)Cl and Cu(II)Cl complexes are nearly isostructural, the former presenting a highly unusual square-planar geometry about Cu(I) . The geometric constraints provided by secondary interactions are reminiscent of blue copper proteins where a constrained geometry, or entatic state, allows for extremely rapid Cu(I)/Cu(II) electron-transfer self-exchange rates. Cu(H2 Tpy(NMes))Cl shows similar fast electron transfer (≈10(5) m(-1) s(-1)) which is the same order of magnitude as biological systems.
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Affiliation(s)
- Eric W Dahl
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI, 48109, USA
| | - Nathaniel K Szymczak
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI, 48109, USA.
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30
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Affiliation(s)
- A. Subha Mahadevi
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
| | - G. Narahari Sastry
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
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31
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Dahl EW, Szymczak NK. Hydrogen Bonds Dictate the Coordination Geometry of Copper: Characterization of a Square‐Planar Copper(I) Complex. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511527] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eric W. Dahl
- Department of Chemistry University of Michigan 930 N. University Ann Arbor MI 48109 USA
| | - Nathaniel K. Szymczak
- Department of Chemistry University of Michigan 930 N. University Ann Arbor MI 48109 USA
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32
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Dong YW, Fan RQ, Chen W, Zhang HJ, Song Y, Du X, Wang P, Wei LG, Yang YL. Luminescence properties of a Zn(ii) supramolecular framework: easily tunable optical properties by variation of the alkyl substitution of (E)-N-(pyridine-2-ylethylidyne)arylamine ligands. RSC Adv 2016. [DOI: 10.1039/c6ra20377a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The easily tunable luminescence properties of Zn(ii) complexes based on the different alkyl substituents of the Schiff-base ligand have been studied in detail.
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Affiliation(s)
- Yu-Wei Dong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Rui-Qing Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Wei Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Hui-Jie Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Yang Song
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Xi Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Ping Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Li-Guo Wei
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
| | - Yu-Lin Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
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33
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Garaikoetxea Arguinzoniz A, Gómez Blanco N, Ansorena Legarra P, Mareque-Rivas JC. Enhanced cancer cell killing of a Pt(IV) prodrug promoted by outer-sphere coordination with polyethyleneimines. Dalton Trans 2016; 44:7135-8. [PMID: 25812853 DOI: 10.1039/c5dt00175g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The cisplatin prodrug c,c,t-[Pt(NH3)2Cl2(O2CCH2CH2CO2)2](2-) (1) forms outer-sphere coordination interactions with non-toxic low MW PEI, which results in enhanced cancer cell killing, also achieved using PEI-coated AuNPs.
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Affiliation(s)
- A Garaikoetxea Arguinzoniz
- Theranostic Nanomedicine Laboratory, CIC biomaGUNE, Paseo Miramón 182, 20009, San Sebastián, Euskadi, Spain.
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34
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Neisen BD, Solntsev P, Halvagar MR, Tolman WB. Secondary Sphere Hydrogen Bonding in Monocopper Complexes of Potentially Dinucleating Bis(carboxamide) Ligands. Eur J Inorg Chem 2015; 2015:5856-5863. [PMID: 27840589 PMCID: PMC5102625 DOI: 10.1002/ejic.201501060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Indexed: 01/08/2023]
Abstract
Reaction of a macrocyclic ligand precursor comprising two bis(carboxamido)pyridine units (H4L4) connected by ethylene linkers with NMe4OH and CuX2 (X = Cl, OAc, or OTf) yielded monocopper complexes [NMe4][(H2L4)Cu(X)] (X = Cl (3), OAc (4), or OH (5)), in contrast to previous work using a related ligand with ortho-phenylene linkers wherein dicopper compounds were isolated. X-ray structures of the complexes revealed hydrogen bonding from the free carboxamide N-H groups in the doubly protonated form of the ligand (H2L4- ) to the monodentate fourth ligand coordinated to the Cu(II) ion. Similar secondary sphere hydrogen bonding interactions were identified in multinuclear compounds [NMe4]2[((H2L4)Cu)n(CO3)] (n = 2 or 3) that were isolated from exposure of 5 to air. Cyclic voltammetry revealed oxidations of 3 and 5 at potentials ~300 mV higher than analogous monocopper complexes of bis(arylcarboxamido)pyridine ligands which lack the intramolecular hydrogen bonds, consistent with removal of electron density from the metal center by the hydrogen bonding array. Another ligand variant (H4L5) with ortho-phenylene linkers and only one bis(carboxamido)pyridine moiety yielded monocopper complexes [NMe4][(H2L5)Cu(OAc)] • DMF (8) and [NMe4][(H2L5)CuCl)] • CH3CN (9), but the X-ray structures revealed a different hydrogen bonding arrangement to the solvate molecules. Nonetheless, a high redox potential for 9 was observed, consistent with intramolecular hydrogen bonding interactions in solution.
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Affiliation(s)
- Benjamin D. Neisen
- Department of Chemistry and Center for Metals and Biocatalysis, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455
| | - Pavlo Solntsev
- Department of Chemistry and Center for Metals and Biocatalysis, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455
| | - Mohammad R. Halvagar
- Department of Chemistry and Center for Metals and Biocatalysis, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455
| | - William B. Tolman
- Department of Chemistry and Center for Metals and Biocatalysis, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455
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35
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Siek S, Dixon NA, Kumar M, Kraus JS, Wells KR, Rowe BW, Kelley SP, Zeller M, Yap GPA, Papish ET. Synthesis of Biomimetic Zinc Complexes for CO2 Activation and the Influence of Steric Changes in the Ttz Ligands [Ttz = Tris(triazolyl)borate]. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500819] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sopheavy Siek
- Department of ChemistryThe University of AlabamaBox 87033635487‐0336TuscaloosaAlabamaUSA
| | - Natalie A. Dixon
- Department of ChemistryDrexel University3141 Chestnut St.19104PhiladelphiaPAUSA
| | - Mukesh Kumar
- Department of ChemistryDrexel University3141 Chestnut St.19104PhiladelphiaPAUSA
| | - Jodi S. Kraus
- Department of ChemistryDrexel University3141 Chestnut St.19104PhiladelphiaPAUSA
| | - Kirsten R. Wells
- Department of ChemistrySalisbury University1101 Camden Ave.21801SalisburyMDUSA
| | - Brittany W. Rowe
- Department of ChemistrySalisbury University1101 Camden Ave.21801SalisburyMDUSA
| | - Steven P. Kelley
- Department of ChemistryThe University of AlabamaBox 87033635487‐0336TuscaloosaAlabamaUSA
| | - Matthias Zeller
- Department of ChemistryYoungstown State UniversityOne University Plaza44555YoungstownOHUSA
| | - Glenn P. A. Yap
- Department of Chemistry and BiochemistryUniversity of Delaware102 Brown Laboratory19716NewarkDEUSA
| | - Elizabeth T. Papish
- Department of ChemistryThe University of AlabamaBox 87033635487‐0336TuscaloosaAlabamaUSA
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36
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Geri JB, Szymczak NK. A Proton-Switchable Bifunctional Ruthenium Complex That Catalyzes Nitrile Hydroboration. J Am Chem Soc 2015; 137:12808-14. [DOI: 10.1021/jacs.5b08406] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jacob B. Geri
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109-1055, United States
| | - Nathaniel K. Szymczak
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109-1055, United States
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37
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Smith DA, Beweries T, Blasius C, Jasim N, Nazir R, Nazir S, Robertson CC, Whitwood AC, Hunter CA, Brammer L, Perutz RN. The Contrasting Character of Early and Late Transition Metal Fluorides as Hydrogen Bond Acceptors. J Am Chem Soc 2015; 137:11820-31. [DOI: 10.1021/jacs.5b07509] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dan A. Smith
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Torsten Beweries
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Clemens Blasius
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Naseralla Jasim
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Ruqia Nazir
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Sadia Nazir
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Craig C. Robertson
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - Adrian C. Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | | | - Lee Brammer
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K
| | - Robin N. Perutz
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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38
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Probing the Protonation State and the Redox-Active Sites of Pendant Base Iron(II) and Zinc(II) Pyridinediimine Complexes. Inorg Chem 2015. [DOI: 10.1021/acs.inorgchem.5b00633] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Yoshida M, Kondo M, Torii S, Sakai K, Masaoka S. Oxygen Evolution Catalyzed by a Mononuclear Ruthenium Complex Bearing Pendant SO3−Groups. Angew Chem Int Ed Engl 2015; 54:7981-4. [DOI: 10.1002/anie.201503365] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Indexed: 11/07/2022]
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40
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Yoshida M, Kondo M, Torii S, Sakai K, Masaoka S. Oxygen Evolution Catalyzed by a Mononuclear Ruthenium Complex Bearing Pendant SO3−Groups. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503365] [Citation(s) in RCA: 15] [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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41
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Sahoo D, Quesne MG, de Visser SP, Rath SP. Hydrogen-Bonding Interactions Trigger a Spin-Flip in Iron(III) Porphyrin Complexes. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 127:4878-4882. [PMID: 26109743 PMCID: PMC4470476 DOI: 10.1002/ange.201411399] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Indexed: 11/16/2022]
Abstract
A key step in cytochrome P450 catalysis includes the spin-state crossing from low spin to high spin upon substrate binding and subsequent reduction of the heme. Clearly, a weak perturbation in P450 enzymes triggers a spin-state crossing. However, the origin of the process whereby enzymes reorganize their active site through external perturbations, such as hydrogen bonding, is still poorly understood. We have thus studied the impact of hydrogen-bonding interactions on the electronic structure of a five-coordinate iron(III) octaethyltetraarylporphyrin chloride. The spin state of the metal was found to switch reversibly between high (S=5/2) and intermediate spin (S=3/2) with hydrogen bonding. Our study highlights the possible effects and importance of hydrogen-bonding interactions in heme proteins. This is the first example of a synthetic iron(III) complex that can reversibly change its spin state between a high and an intermediate state through weak external perturbations.
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Affiliation(s)
- Dipankar Sahoo
- Department of Chemistry, Indian Institute of Technology KanpurKanpur-208016 (India)
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK)
| | - Matthew G Quesne
- Department of Chemistry, Indian Institute of Technology KanpurKanpur-208016 (India)
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK)
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42
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Okamoto K, Kuwabara J, Kanbara T. Secondary Thioamides as Multidentate Ligands for Functional Metal Complexes. CHEM LETT 2015. [DOI: 10.1246/cl.140996] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ken Okamoto
- National Institute for Materials Science (NIMS)
| | - Junpei Kuwabara
- Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), Graduate School of Pure and Applied Sciences, University of Tsukuba
| | - Takaki Kanbara
- Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), Graduate School of Pure and Applied Sciences, University of Tsukuba
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43
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Sahoo D, Quesne MG, de Visser SP, Rath SP. Hydrogen-bonding interactions trigger a spin-flip in iron(III) porphyrin complexes. Angew Chem Int Ed Engl 2015; 54:4796-800. [PMID: 25645603 PMCID: PMC4687417 DOI: 10.1002/anie.201411399] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Indexed: 12/03/2022]
Abstract
A key step in cytochrome P450 catalysis includes the spin-state crossing from low spin to high spin upon substrate binding and subsequent reduction of the heme. Clearly, a weak perturbation in P450 enzymes triggers a spin-state crossing. However, the origin of the process whereby enzymes reorganize their active site through external perturbations, such as hydrogen bonding, is still poorly understood. We have thus studied the impact of hydrogen-bonding interactions on the electronic structure of a five-coordinate iron(III) octaethyltetraarylporphyrin chloride. The spin state of the metal was found to switch reversibly between high (S=5/2) and intermediate spin (S=3/2) with hydrogen bonding. Our study highlights the possible effects and importance of hydrogen-bonding interactions in heme proteins. This is the first example of a synthetic iron(III) complex that can reversibly change its spin state between a high and an intermediate state through weak external perturbations.
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Affiliation(s)
- Dipankar Sahoo
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016 (India)
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44
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Azhdari Tehrani A, Morsali A, Kubicki M. The role of weak hydrogen and halogen bonding interactions in the assembly of a series of Hg(ii) coordination polymers. Dalton Trans 2015; 44:5703-12. [DOI: 10.1039/c4dt03638g] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A series of eight new Hg(ii) complexes based on the L4-X ligands, where L is (E)-4-halo-N-(pyridin-4-ylmethylene)aniline, were synthesized and characterized and their supramolecular crystal structures were studied by different geometrical and theoretical methods.
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Affiliation(s)
| | - Ali Morsali
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Iran
| | - Maciej Kubicki
- Department of Chemistry
- Adam Mickiewicz University
- 60-780 Poznan
- Poland
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45
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Khavasi HR, Mir Mohammad Sadegh B. Influence of N-heteroaromatic π–π stacking on supramolecular assembly and coordination geometry; effect of a single-atom change in the ligand. Dalton Trans 2015; 44:5488-502. [DOI: 10.1039/c4dt03518f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A study on how the polarization of aromatic systems, through the introduction of a nitrogen heteroatom, affects the π–π interactions and crystal packing of mercury coordination compounds.
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46
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Marshall-Roth T, Brown SN. Redox activity and π bonding in a tripodal seven-coordinate molybdenum(vi) tris(amidophenolate). Dalton Trans 2015; 44:677-85. [DOI: 10.1039/c4dt02936d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A tripodal seven-coordinate tris(amidophenolato)molybdenum(vi) complex shows strong ligand-to-metal π donation (40 kcal mol−1 per π bond) and undergoes facile ligand-centered oxidation.
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Affiliation(s)
| | - Seth N. Brown
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Notre Dame
- USA
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47
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48
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Graham DJ, Nocera DG. Electrocatalytic H2 Evolution by Proton-Gated Hangman Iron Porphyrins. Organometallics 2014. [DOI: 10.1021/om500300e] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Daniel J. Graham
- Department
of Chemistry and
Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Daniel G. Nocera
- Department
of Chemistry and
Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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49
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Sharma R, Kumar S, Saini A, Venugopalan P, Rodríguez-Diéguez A, Salas J. Cation–anion interactions via hydrogen bonding; synthesis, characterization and single crystal X-ray structure of [Cu(phen)3](1,3-benzenedisulphonate)⋅7H2O. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.04.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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50
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Zulkefeli M, Hisamatsu Y, Suzuki A, Miyazawa Y, Shiro M, Aoki S. Supramolecular Phosphatases Formed by the Self-Assembly of the Bis(Zn2+-Cyclen) Complex, Copper(II), and Barbital Derivatives in Water. Chem Asian J 2014; 9:2831-41. [DOI: 10.1002/asia.201402513] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 06/05/2014] [Indexed: 01/19/2023]
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