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Schreck C, Weihermüller J, Thoma P, Rosenfeldt S, Drechsler M, Förster C, Heinze K, Hörner G, Weber B. Solvent‐dependent self‐assembly of an amphiphilic copper(II) complex with bulky head groups. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | - Markus Drechsler
- Universitat Bayreuth Keylab Electron and Optical Microscopy GERMANY
| | - Christoph Förster
- Mainz University: Johannes Gutenberg Universitat Mainz Chemistry GERMANY
| | - Katja Heinze
- Mainz University: Johannes Gutenberg Universitat Mainz Chemistry GERMANY
| | | | - Birgit Weber
- Universitat Bayreuth Fachbereich Chemie Universitätsstr. 30, NW I 95440 Bayreuth GERMANY
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2
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Steric Quenching of Mn(III) Thermal Spin Crossover: Dilution of Spin Centers in Immobilized Solutions. MAGNETOCHEMISTRY 2022. [DOI: 10.3390/magnetochemistry8010008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Structural and magnetic properties of a new spin crossover complex [Mn(4,6-diOMe-sal2323)]+ in lattices with ClO4−, (1), NO3−, (2), BF4−, (3), CF3SO3−, (4), and Cl− (5) counterions are reported. Comparison with the magnetostructural properties of the C6, C12, C18 and C22 alkylated analogues of the ClO4− salt of [Mn(4,6-diOMe-sal2323)]+ demonstrates that alkylation effectively switches off the thermal spin crossover pathway and the amphiphilic complexes are all high spin. The spin crossover quenching in the amphiphiles is further probed by magnetic, structural and Raman spectroscopic studies of the PF6− salts of the C6, C12 and C18 complexes of a related complex [Mn(3-OMe-sal2323)]+ which confirm a preference for the high spin state in all cases. Structural analysis is used to rationalize the choice of the spin quintet form in the seven amphiphilic complexes and to highlight the non-accessibility of the smaller spin triplet form of the ion more generally in dilute environments. We suggest that lattice pressure is a requirement to stabilize the spin triplet form of Mn3+ as the low spin form is not known to exist in solution.
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3
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Ghosh S, Prasanthkumar S, Das S, Saeki A, Seki S, Ajayaghosh A. Structurally directed thienylenevinylene self–assembly for improved charge carrier mobility: 2D sheets vs 1D fibers. Chem Commun (Camb) 2022; 58:6837-6840. [DOI: 10.1039/d2cc02111k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High charge carrier mobility is a prerequisite for organic electronics for which molecular arrangement and morphology plays a vital role. Herein, we report how the self-assembly of thienylenevinylenes T1 and...
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4
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Dürrmann A, Hörner G, Wagner S, Breuning M, Weber B. Sterically Encumbered Coordination Sites. Iron(II) Complexes of Jäger‐type ligands with a Terphenyl Backbone. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andreas Dürrmann
- Department of Chemistry Inorganic Chemistry University of Bayreuth Universitätsstraße 30, NWI 95440 Bayreuth Germany
| | - Gerald Hörner
- Department of Chemistry Inorganic Chemistry University of Bayreuth Universitätsstraße 30, NWI 95440 Bayreuth Germany
| | - Stefan Wagner
- Department of Chemistry Organic Chemistry University of Bayreuth Universitätsstraße 30, NWII 95440 Bayreuth Germany
| | - Matthias Breuning
- Department of Chemistry Organic Chemistry University of Bayreuth Universitätsstraße 30, NWII 95440 Bayreuth Germany
| | - Birgit Weber
- Department of Chemistry Inorganic Chemistry University of Bayreuth Universitätsstraße 30, NWI 95440 Bayreuth Germany
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5
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Zheng S, Spa S, Geest EP, Ruitenbeek JM, Bonnet S. Highly Ordered, Self‐Assembled Monolayers of a Spin‐Crossover Complex with In‐Plane Interactions. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sipeng Zheng
- Leiden Institute of Chemistry Leiden University Gorlaeus Laboratories P.O. Box 9502 2300 RA Leiden The Netherlands
| | - Silvia Spa
- Leiden Institute of Chemistry Leiden University Gorlaeus Laboratories P.O. Box 9502 2300 RA Leiden The Netherlands
| | - Erik P. Geest
- Leiden Institute of Chemistry Leiden University Gorlaeus Laboratories P.O. Box 9502 2300 RA Leiden The Netherlands
- Leiden Institute of Physics Leiden University Kamerlingh Onnes Laboratory Niels Bohrweg 2 2333 CA Leiden The Netherlands
| | - Jan M. Ruitenbeek
- Leiden Institute of Physics Leiden University Kamerlingh Onnes Laboratory Niels Bohrweg 2 2333 CA Leiden The Netherlands
| | - Sylvestre Bonnet
- Leiden Institute of Chemistry Leiden University Gorlaeus Laboratories P.O. Box 9502 2300 RA Leiden The Netherlands
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6
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Melotti M, S. S. Paqui M, Amorim AL, P. de Paula C, Rocha MC, Malavazi I, Cunha A, S. Santana F, Ribeiro RR, Gariani RA, Mendes SR, Xavier FR. Polypyridyl iron( iii) complexes containing long alkyl chains: synthesis, characterization, DFT calculations and biological activity. NEW J CHEM 2021. [DOI: 10.1039/d0nj00895h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A bis(picolyl)amine ligand was functionalized with a long alkyl chain, and two iron(iii) complexes were prepared and their biological activity was presented.
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Affiliation(s)
- Marcelo Melotti
- Departamento de Química, Universidade do Estado de Santa Catarina
- Joinville
- Brazil
| | - Matheus S. S. Paqui
- Departamento de Química, Universidade do Estado de Santa Catarina
- Joinville
- Brazil
| | | | - Carla P. de Paula
- Departamento de Genética e Evolução, Universidade Federal de São Carlos
- São Carlos
- Brazil
| | - Marina C. Rocha
- Departamento de Genética e Evolução, Universidade Federal de São Carlos
- São Carlos
- Brazil
| | - Iran Malavazi
- Departamento de Genética e Evolução, Universidade Federal de São Carlos
- São Carlos
- Brazil
| | - Anderson Cunha
- Departamento de Genética e Evolução, Universidade Federal de São Carlos
- São Carlos
- Brazil
| | | | | | - Rogério A. Gariani
- Departamento de Química, Universidade do Estado de Santa Catarina
- Joinville
- Brazil
| | - Samuel R. Mendes
- Departamento de Química, Universidade do Estado de Santa Catarina
- Joinville
- Brazil
| | - Fernando R. Xavier
- Departamento de Química, Universidade do Estado de Santa Catarina
- Joinville
- Brazil
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7
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Spin Crossover in 3D Metal Centers Binding Halide-Containing Ligands: Magnetism, Structure and Computational Studies. SUSTAINABILITY 2020. [DOI: 10.3390/su12062512] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The capability of a given substance to change its spin state by the action of a stimulus, such as a change in temperature, is by itself a very challenging property. Its interest is increased by the potential applications and the need to find sustainable functional materials. 3D transition metal complexes, mainly with octahedral geometry, display this property when coordinated to particular sets of ligands. The prediction of this behavior has been attempted by many authors. It is, however, made very difficult because spin crossover (SCO), as it is called, occurs most often in the solid state, where besides complexes, counter ions, and solvents are also present in many cases. Intermolecular interactions definitely play a major role in SCO. In this review, we decided to analyze SCO in mono- and binuclear transition metal complexes containing halogens as ligands or as substituents of the ligands. The aim was to try and find trends in the properties which might be correlated to halogen substitution patterns. Besides a revision of the properties, we analyzed structures and other information. We also tried to build a simple model to run Density Functional Theory (DFT) calculations and calculate several parameters hoping to find correlations between calculated indices and SCO data. Although there are many experimental studies and single-crystal X-ray diffraction structures, there are only few examples with the F, Cl, Br and series. When their intermolecular interactions were not very different, T1/2 (temperature with 50% high spin and 50% low spin states) usually increased with the calculated ligand field parameter (Δoct) within a given family. A way to predict SCO remains elusive.
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8
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Dankhoff K, Lochenie C, Weber B. Iron(II) Spin Crossover Complexes with 4,4'-Dipyridylethyne-Crystal Structures and Spin Crossover with Hysteresis. Molecules 2020; 25:molecules25030581. [PMID: 32013168 PMCID: PMC7037042 DOI: 10.3390/molecules25030581] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/22/2020] [Accepted: 01/27/2020] [Indexed: 11/29/2022] Open
Abstract
Three new iron(II) 1D coordination polymers with cooperative spin crossover behavior showing thermal hysteresis loops were synthesized using N2O2 Schiff base-like equatorial ligands and 4,4′-dipyridylethyne as a bridging, rigid axial linker. One of those iron(II) 1D coordination polymers showed a 73 K wide hysteresis below room temperature, which, upon solvent loss, decreased to a still remarkable 30 K wide hysteresis. Single crystal X-ray structures of two iron(II) coordination polymers and T-dependent powder XRD patterns are discussed to obtain insight into the structure property relationship of those materials.
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9
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Sundaresan S, Kitchen JA, Brooker S. Hydrophobic tail length in spin crossover active iron( ii) complexes predictably tunes T½ in solution and enables surface immobilisation. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01478k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linear correlation of the hydrophobic alkyl tail length R employed in [FeII(LH-OR)(NCBH3)2] with the spin crossover switching temperature is a very convenient method of predictably tuning the iron(ii) spin state.
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Affiliation(s)
- Sriram Sundaresan
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
| | - Jonathan A. Kitchen
- School of Natural and Computational Sciences
- Massey University Auckland
- New Zealand
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
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10
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Schönfeld S, Lochenie C, Hörner G, Weber B. Iron(II) complexes with N 2O 2 coordinating Schiff base-like equatorial ligand and 1,2-bis(pyridin-2-ylethynyl)benzene as axial pincer ligand. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:504002. [PMID: 31469114 DOI: 10.1088/1361-648x/ab3e92] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three new unique mononuclear iron(II) pincer complexes were synthesized using 1,2-bis(pyridin-2-ylethynyl)benzene as axially coordinating pincer ligand and N2O2 coordinating Schiff base-like equatorial ligands. Magnetic susceptibility measurements reveal that all three complexes remain in the high spin state throughout the entire temperature range investigated. Reasons for this are restraining sterical interactions revealed in the single crystal x-ray structure analysis and extended DFT-computational studies of one of the pincer complexes. Those interactions also lead to the formation of unexpected side products during the synthesis such as a complex with two ethanol molecules as axial ligand, whose x-ray structure was determined.
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11
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Haiduc I. Review. Inverse coordination. Organic nitrogen heterocycles as coordination centers. A survey of molecular topologies and systematization. Part 2. Six-membered rings. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1670349] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ionel Haiduc
- Facultatea de Chimie, Universitatea Babeş-Bolyai, Cluj-Napoca, Romania
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12
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Morphology and magnetic properties of synthesized lipid packaged iron(II) complex. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-018-0815-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Structure and magnetic property of µ-oxo bridged dinuclear iron(III) complex with trialkylated tridentated ligands. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-018-0810-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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14
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Vicente AI, Wu X, Ortin Y, Ferreira LP, Carvalho MDD, Realista S, Barker A, Morgan GG, Galamba N, Costa PJ, Calhorda MJ, Martinho PN. Directing self-assembly in solution towards improved cooperativity in Fe(iii) complexes with amphiphilic tridentate ligands. Dalton Trans 2019; 48:4239-4247. [PMID: 30843914 DOI: 10.1039/c9dt00032a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An amphiphilic iron(iii) complex with a tridentate Schiff-base ligand was prepared by condensation of a hexadecyloxy functionalised salycylaldehyde with a diamine followed by complexation with FeCl2 and anion methathesis with NaClO4. The complex shows spin crossover both in the solid state and solution. However in solution self-assembly and consequently aggregation of individual molecules form concentration dependent particles with sizes of 300 nm for higher concentrations, or 5 nm for lower concentrations. Aggregate formation was confirmed by NANO-flex 180° DLS Size, scan-rate dependent cyclic voltammetry and scanning electron microscopy. Molecular simulations were used to investigate the self-assembly of the complex in solution, including the role of residual water molecules. The simulations showed the self-assembly of reverse micelle-like structures when a small water cluster is inserted in solution, whereas no large aggregates formed in dehydrated environments. The perchlorate anions were found near the metal centres, stabilizing the aggregates around the water pool. Simulations of pre-assembled structures further showed the lack of stability of large aggregates in the absence of water. The larger aggregates promoted efficient communication between the iron(iii) centres and the compound displayed spin crossover in solution at around 220 K with a 10 K hysteresis window, as measured by NMR and SQUID magnetometry.
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Affiliation(s)
- Ana I Vicente
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa Campo Grande, 1749-016 Lisboa, Portugal.
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15
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Isenberg C, Käkel EB, Saragi TPI, Thoma P, Weber B, Lorenz A. Generation of twisted nanowires with achiral organic amphiphilic copper complexes. RSC Adv 2019; 9:1807-1813. [PMID: 35516119 PMCID: PMC9059773 DOI: 10.1039/c8ra09027k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/01/2019] [Indexed: 11/21/2022] Open
Abstract
Drying under solvent atmosphere (DUSA) was investigated as an experimental technique to generate self-assembled nanowires and needles from solutions of organic molecules under controlled conditions. Experimental observations of twisted nanowires are reported. These twisted nanowires were obtained by drying of solutions of achiral molecules under solvent controlled atmospheres: achiral, amphiphilic copper complexes were dissolved in an achiral solvent and these solutions were dried under controlled conditions. Two structurally related copper complexes were investigated. Microscopic investigations of the resulting nanowires revealed, and scanning electron microscopy confirmed: self-assembled twisted ribbons could be selectively obtained from one of these compounds. This behavior could be explained by comparing the ratio of the size of the head group and the overall length of the molecules. The occurrence of chiral filaments and chiral phases of nanosegregated filaments are rare in achiral compounds. The occurance of such twisted filaments is thought to be related to symmetry-breaking during a phase transition from liquid crystalline or lyotropic liquid crystalline phases to a nanosegregated phase. In the reported experiments, the concentration of a solution was gradually increased until crystallization occurred. The results clearly show how DUSA can be applied to investigate the capability of achiral substances to yield twisted filaments. Moreover, the investigated compounds had high-enough charge carrier mobilities, such that the twisted filaments obtained are candidates for self-assembled, intrinsically coiled nano-inductivities.
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Affiliation(s)
- Carolin Isenberg
- Macromolecular Chemistry and Molecular Materials (mmCmm), Department of Mathematics and Science, University of Kassel Heinrich-Plett-Straße 40 34132 Kassel Germany
| | - Eireen B Käkel
- Macromolecular Chemistry and Molecular Materials (mmCmm), Department of Mathematics and Science, University of Kassel Heinrich-Plett-Straße 40 34132 Kassel Germany
| | - Tobat P I Saragi
- Macromolecular Chemistry and Molecular Materials (mmCmm), Department of Mathematics and Science, University of Kassel Heinrich-Plett-Straße 40 34132 Kassel Germany
| | - Peter Thoma
- Department of Chemistry, Universität Bayreuth Universitätsstrasse 30 NW I 95440 Bayreuth Germany
| | - Birgit Weber
- Department of Chemistry, Universität Bayreuth Universitätsstrasse 30 NW I 95440 Bayreuth Germany
| | - Alexander Lorenz
- Macromolecular Chemistry and Molecular Materials (mmCmm), Department of Mathematics and Science, University of Kassel Heinrich-Plett-Straße 40 34132 Kassel Germany
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Weihermüller J, Schlamp S, Dittrich B, Weber B. Kinetic Trapping Effects in Amphiphilic Iron(II) Spin Crossover Compounds. Inorg Chem 2019; 58:1278-1289. [DOI: 10.1021/acs.inorgchem.8b02763] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Stephan Schlamp
- Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Birger Dittrich
- Anorganische Chemie und Strukturchemie II, Heinrich-Heine University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Birgit Weber
- Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
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17
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18
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Bauer W, Ossiander T, Weber B. Synthesis of iron(II) complexes with asymmetric N2O2 coordinating Schiff base-like ligands and their spin crossover properties. Front Chem Sci Eng 2018. [DOI: 10.1007/s11705-018-1753-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Lochenie C, Schötz K, Panzer F, Kurz H, Maier B, Puchtler F, Agarwal S, Köhler A, Weber B. Spin-Crossover Iron(II) Coordination Polymer with Fluorescent Properties: Correlation between Emission Properties and Spin State. J Am Chem Soc 2018; 140:700-709. [PMID: 29251919 DOI: 10.1021/jacs.7b10571] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A spin-crossover coordination polymer [Fe(L1)(bipy)]n (where L = a N2O22- coordinating Schiff base-like ligand bearing a phenazine fluorophore and bipy = 4,4'-bipyridine) was synthesized and exhibits a 48 K wide thermal hysteresis above room temperature (T1/2↑ = 371 K and T1/2↓ = 323 K) that is stable for several cycles. The spin transition was characterized using magnetic measurements, Mössbauer spectroscopy, and DSC measurements. T-dependent X-ray powder diffraction reveals a structural phase transition coupled with the spin transition phenomenon. The dimeric excerpt {(μ-bipy)[FeL1(MeOH)]2}·2MeOH of the coordination polymer chain crystallizes in the triclinic space group P1̅ and reveals that the packing of the molecules in the crystal is dominated by hydrogen bonds. Investigation of the emission properties of the complexes with regard to temperature shows that the spin crossover can be tracked by monitoring the emission spectra, since the emission color changes from greenish to a yellow color upon the low spin-to-high spin transition.
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Affiliation(s)
- Charles Lochenie
- Inorganic Chemistry II, Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Konstantin Schötz
- Experimental Physics II and Bayreuth Institute of Macromolecular Research (BMBF) Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Fabian Panzer
- Experimental Physics II and Bayreuth Institute of Macromolecular Research (BMBF) Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Hannah Kurz
- Inorganic Chemistry II, Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Bernadette Maier
- Inorganic Chemistry II, Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Florian Puchtler
- Inorganic Chemistry I, Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Seema Agarwal
- Macromolecular Chemistry II, Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Anna Köhler
- Experimental Physics II and Bayreuth Institute of Macromolecular Research (BMBF) Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
| | - Birgit Weber
- Inorganic Chemistry II, Universität Bayreuth , Universitätsstrasse 30, NW I, 95440 Bayreuth, Germany
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20
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Weber B. Synthesis of Coordination Polymer Nanoparticles using Self-Assembled Block Copolymers as Template. Chemistry 2017; 23:18093-18100. [PMID: 28898479 DOI: 10.1002/chem.201703280] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Indexed: 12/29/2022]
Abstract
Nowadays there is a high demand in specialized functional materials, for example, for applications as sensors in biomedicine. For the realization of such applications, nanostructures and the integration in a composite matrix are indispensable. Coordination polymers and networks, for example, with spin crossover properties, are a highly promising family of switchable materials in which the switching process can be triggered by various external stimuli. An overview over different strategies for the synthesis of nanoparticles of such systems is given. A special focus is set on the use of block copolymer micelles as templates for the synthesis of nanocomposites. The block copolymer defines the final size and shape of the nanoparticle core. Additionally it allows a further functionalization of the obtained nanoparticles by variation of the polymer blocks and an easy deposition of the composite material on surfaces.
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Affiliation(s)
- Birgit Weber
- Anorganische Chemie II, Universität Bayreuth, 95440, Bayreuth, Germany
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21
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Weber B, Kaps E, Dankhoff K. Synthesis of a New Schiff Base-like Trinucleating Ligand and its Copper, Vanadyl, and Iron Complexes - Influence of the Bridging Ligand on the Magnetic Properties. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700277] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Birgit Weber
- Anorganische Chemie II; Universität Bayreuth; 95440 Bayreuth Germany
| | - Eike Kaps
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 81377 München Germany
| | - Katja Dankhoff
- Anorganische Chemie II; Universität Bayreuth; 95440 Bayreuth Germany
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22
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Al-Rehili S, Fhayli K, Hammami MA, Moosa B, Patil S, Zhang D, Alharbi O, Hedhili MN, Möhwald H, Khashab NM. Anisotropic Self-Assembly of Organic–Inorganic Hybrid Microtoroids. J Am Chem Soc 2016; 139:10232-10238. [DOI: 10.1021/jacs.6b10080] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Safa’a Al-Rehili
- Smart
Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous
Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Karim Fhayli
- Smart
Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous
Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Mohamed Amen Hammami
- Smart
Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous
Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Basem Moosa
- Smart
Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous
Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Sachin Patil
- Smart
Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous
Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Daliang Zhang
- Imaging and Characterization Core Laboratories, King Abdullah University of Science & Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Ohoud Alharbi
- Imaging and Characterization Core Laboratories, King Abdullah University of Science & Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Mohamed Nejib Hedhili
- Imaging and Characterization Core Laboratories, King Abdullah University of Science & Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Helmuth Möhwald
- Max-Planck-Institute of Colloids and Interfaces, Am Muehlenberg 1,14476 Potsdam, Germany
| | - Niveen M. Khashab
- Smart
Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous
Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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23
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Dankhoff K, Lochenie C, Puchtler F, Weber B. Solvent Influence on the Magnetic Properties of Iron(II) Spin-Crossover Coordination Compounds with 4,4′-Dipyridylethyne as Linker. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501175] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Lochenie C, Gebauer A, Klimm O, Puchtler F, Weber B. Iron(ii) spin crossover complexes with diaminonaphthalene-based Schiff base-like ligands: 1D coordination polymers. NEW J CHEM 2016. [DOI: 10.1039/c5nj02470f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron(ii) spin crossover coordination polymers with diaminonaphthalene derived Schiff base-like ligands were synthesised, and their magnetic and structural properties were analysed. Rigid bridging ligands having up to 40 K wide hysteresis loops were observed.
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Affiliation(s)
| | - Andreas Gebauer
- Inorganic Chemistry II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
| | - Ottokar Klimm
- Inorganic Chemistry II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
| | | | - Birgit Weber
- Inorganic Chemistry II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
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25
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Lochenie C, Heinz J, Milius W, Weber B. Iron(ii) spin crossover complexes with diaminonaphthalene-based Schiff base-like ligands: mononuclear complexes. Dalton Trans 2015; 44:18065-77. [DOI: 10.1039/c5dt03048j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron(ii) spin crossover (SCO) complexes with diaminonaphthalene derived Schiff base-like ligand were synthesised, and their magnetic and structural properties analysed.
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Affiliation(s)
| | - Julia Heinz
- Inorganic Chemistry II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
| | - Wolfgang Milius
- Inorganic Chemistry I
- Universität Bayreuth
- 95440 Bayreuth
- Germany
| | - Birgit Weber
- Inorganic Chemistry II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
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26
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Schönfeld S, Lochenie C, Thoma P, Weber B. 1D iron(ii) spin crossover coordination polymers with 3,3′-azopyridine – kinetic trapping effects and spin transition above room temperature. CrystEngComm 2015. [DOI: 10.1039/c5ce00800j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Schlamp S, Lochenie C, Bauer T, Kempe R, Weber B. Iron(II) Spin‐Crossover Complexes with Schiff Base Like Ligands and
N
‐Alkylimidazoles. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201403021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Stephan Schlamp
- Lehrstuhl für Anorganische Chemie II, Universität Bayreuth, Universitätsstraße 30, NW 1, 95440 Bayreuth, Germany, http://www.ac2‐weber.uni‐bayreuth.de
| | - Charles Lochenie
- Lehrstuhl für Anorganische Chemie II, Universität Bayreuth, Universitätsstraße 30, NW 1, 95440 Bayreuth, Germany, http://www.ac2‐weber.uni‐bayreuth.de
| | - Tobias Bauer
- Lehrstuhl für Anorganische Chemie II, Universität Bayreuth, Universitätsstraße 30, NW 1, 95440 Bayreuth, Germany, http://www.ac2‐weber.uni‐bayreuth.de
| | - Rhett Kempe
- Lehrstuhl für Anorganische Chemie II, Universität Bayreuth, Universitätsstraße 30, NW 1, 95440 Bayreuth, Germany, http://www.ac2‐weber.uni‐bayreuth.de
| | - Birgit Weber
- Lehrstuhl für Anorganische Chemie II, Universität Bayreuth, Universitätsstraße 30, NW 1, 95440 Bayreuth, Germany, http://www.ac2‐weber.uni‐bayreuth.de
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28
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Lochenie C, Bauer W, Railliet AP, Schlamp S, Garcia Y, Weber B. Large Thermal Hysteresis for Iron(II) Spin Crossover Complexes with N-(Pyrid-4-yl)isonicotinamide. Inorg Chem 2014; 53:11563-72. [DOI: 10.1021/ic501624b] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Charles Lochenie
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
- Insitute of Condensed Matter
and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Wolfgang Bauer
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
| | - Antoine P. Railliet
- Insitute of Condensed Matter
and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Stephan Schlamp
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
| | - Yann Garcia
- Insitute of Condensed Matter
and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Birgit Weber
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
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