1
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Gupta H, Vincenzini BD, Bacon AM, Schelter EJ. Assembly of a trapped valent Ce III/IV-TCNQ complex through metal-ligand redox cooperativity. Chem Commun (Camb) 2024; 60:6909-6912. [PMID: 38881335 DOI: 10.1039/d4cc01478b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Complex (Cp3CeIV)2(TCNQ)(CeIIICp3)2 (1) was prepared by reducing neutral TCNQ0 (tetracyanoquinodimethane) with Cp3Ce(THF). Two types of cerium centres with a dianionic TCNQ2- moiety are present in 1, wherein each of the four cyano-groups are bound by a cation. Formation of this trapped-valent organocerium compound 1 is facilitated by metal-ligand redox cooperativity. Characterization of 1 was carried out using structural-, magnetometry-, and IR-spectroscopic analyses. Photophysical studies on this compound reveal CeIII luminescence, and opens up avenues for promising multifunctional, mixed-valent lanthanide materials.
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Affiliation(s)
- Himanshu Gupta
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA.
| | - Brett D Vincenzini
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA.
| | - Alexandra M Bacon
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA.
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA.
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2
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Alzubidi AE, Bond AM, Martin LL. Oxidation of Thiosulphate using TCNQF
n
(n=0, 2, 4) Derivatives with a Tuneable Driving Force: Electrochemical and Spectrophotometric Detection of a Protonated Intermediate. ChemElectroChem 2022. [DOI: 10.1002/celc.202200538] [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)
| | - Alan M. Bond
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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3
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Jakub Z, Kurowská A, Herich O, Černá L, Kormoš L, Shahsavar A, Procházka P, Čechal J. Remarkably stable metal-organic frameworks on an inert substrate: M-TCNQ on graphene (M = Ni, Fe, Mn). NANOSCALE 2022; 14:9507-9515. [PMID: 35749122 DOI: 10.1039/d2nr02017c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Potential applications of 2D metal-organic frameworks (MOF) require the frameworks to be monophase and well-defined at the atomic scale, to be decoupled from the supporting substrate, and to remain stable at the application conditions. Here, we present three systems meeting this elusive set of requirements: M-TCNQ (M = Ni, Fe, Mn) on epitaxial graphene/Ir(111). We study the systems experimentally by scanning tunneling microscopy, low energy electron microscopy and X-ray photoelectron spectroscopy. When synthesized on graphene, the 2D M-TCNQ MOFs are monophase with M1(TCNQ)1 stoichiometry, no alternative structure was observed with slight variation of the preparation protocol. We further demonstrate a remarkable chemical and thermal stability of TCNQ-based 2D MOFs: all the studied systems survive exposure to ambient conditions, with Ni-TCNQ doing so without any significant changes to its atomic-scale structure or chemical state. Thermally, the most stable system is Fe-TCNQ which remains stable above 500 °C, while all the tested MOFs survive heating to 250 °C. Overall, the modular M-TCNQ/graphene system combines the atomic-scale definition required for fundamental studies with the robustness and stability needed for applications, thus we consider it an ideal model for research in single atom catalysis, spintronics or high-density storage media.
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Affiliation(s)
- Zdeněk Jakub
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Anna Kurowská
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Ondrej Herich
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Lenka Černá
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Lukáš Kormoš
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Azin Shahsavar
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Pavel Procházka
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
| | - Jan Čechal
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic.
- Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69, Brno, Czech Republic
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4
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Elliott RW, Sutton AL, Abrahams BF, D'Alessandro DM, Goerigk L, Hua C, Hudson TA, Robson R, White KF. Multifunctional Coordination Polymer Exhibiting Reversible Mechanical Motion Allowing Selective Uptake of Guests and Leading to Enhanced Electrical Conductivity. Inorg Chem 2021; 60:13658-13668. [PMID: 34428031 DOI: 10.1021/acs.inorgchem.1c01979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A remarkably flexible, multifunctional, 2D coordination polymer exhibiting an unprecedented mode of reversible mechanical motion, enabling pores to open and close, is reported. Such multifunctional materials are highly sought after, owing to the potential to exploit coexisting electronic and mechanical functionalities that underpin useful technological applications such as actuators and ultrasensitive detectors. The coordination polymer, of composition Mn(F4TCNQ)(py)2 (F4TCNQ = 2,3,5,6-tetrafluoro-7,7,8,8-tetracycanoquinodimethane; py = pyridine), consists of Mn(II) centers bridged by F4TCNQ dianions and coordinated by py molecules that extend above and below the 2D network. Exposure of Mn(F4TCNQ)(py)2, in its collapsed state, to carbon dioxide results in a pore-opening process at a threshold pressure for a given temperature. In addition to carbon dioxide, a variety of volatile guests may be incorporated into the pores, which are lined with electron-rich F4TCNQ dianions. The inclusion of electron-deficient guests such as 1,4-benzoquinone, nitrobenzene, maleic anhydride, and iodine into the pores is accompanied by a striking color change associated with a new host-guest charge-transfer interaction and an improvement in the semiconductor behavior, with the iodine adduct showing an increase in conductivity of almost 5 orders of magnitude. Experimental and density functional theory calculations on this remarkable multifunctional material demonstrate a reduction in the optical band gap with increasing electron affinity of the guest.
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Affiliation(s)
- Robert W Elliott
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Ashley L Sutton
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Brendan F Abrahams
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | | | - Lars Goerigk
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Carol Hua
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia.,School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Timothy A Hudson
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Richard Robson
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Keith F White
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia.,School of Molecular Science, La Trobe University, Wodonga, Victoria 3690, Australia
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5
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Chakraborty G, Park IH, Medishetty R, Vittal JJ. Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications. Chem Rev 2021; 121:3751-3891. [PMID: 33630582 DOI: 10.1021/acs.chemrev.0c01049] [Citation(s) in RCA: 287] [Impact Index Per Article: 95.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Gouri Chakraborty
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - In-Hyeok Park
- Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon 34134, South Korea
| | | | - Jagadese J. Vittal
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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6
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Watts KE, Clary KE, Lichtenberger DL, Pemberton JE. FTIR Spectroelectrochemistry of F4TCNQ Reduction Products and Their Protonated Forms. Anal Chem 2020; 92:7154-7161. [PMID: 32357003 DOI: 10.1021/acs.analchem.0c00615] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The tetrafluorinated derivative of 7,7,8,8-tetracyanoquinodimethane (TCNQ), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ), is of interest for charge transfer complex formation and as a p-dopant in organic electronic materials. Fourier transform infrared (FTIR) spectroscopy is commonly employed to understand the redox properties of F4TCNQ in the matrix of interest; specifically, the ν(C≡N) region of the F4TCNQ spectrum is exquisitely sensitive to the nature of the charge transfer between F4TCNQ and its matrix. However, little work has been done to understand how these vibrational modes change in the presence of possible acid/base chemistry. Here, FTIR spectroelectrochemistry is coupled with density functional theory spectral simulation for study of the electrochemically generated F4TCNQ radical anion and dianion species and their protonation products with acids. Vibrational modes of HF4TCNQ-, formed by proton-coupled electron transfer, are identified, and we demonstrate that this species is readily formed by strong acids, such as trifluoroacetic acid, and to a lesser extent, by weak acids, such as water. The implications of this chemistry for use of F4TCNQ as a p-dopant in organic electronic materials is discussed.
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Affiliation(s)
- Kristen E Watts
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
| | - Kayla E Clary
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
| | - Dennis L Lichtenberger
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
| | - Jeanne E Pemberton
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
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7
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Hudson TA, Sutton AL, Abrahams BF, D'Alessandro DM, Davies CG, Goerigk L, Jameson GNL, Moubaraki B, Murray KS, Robson R, Usov PM, Yang G. A Semiconducting Cationic Square‐Grid Network with Fe
III
Centers Displaying Unusual Dynamic Behavior. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Timothy. A. Hudson
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
| | - Ashley L. Sutton
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
| | - Brendan F. Abrahams
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
| | | | - Casey G. Davies
- Department of Chemistry & MacDiarmid Institute for Advanced Materials & Nanotechnology University of Otago PO Box 56 9054 Dunedin New Zealand
| | - Lars Goerigk
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
| | - Guy N. L. Jameson
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
- Department of Chemistry & MacDiarmid Institute for Advanced Materials & Nanotechnology University of Otago PO Box 56 9054 Dunedin New Zealand
- Bio‐21 University of Melbourne 3010 Melbourne Victoria Australia
| | | | - Keith S. Murray
- School of Chemistry Monash University 3800 Clayton Victoria Australia
| | - Richard Robson
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
| | - Pavel M. Usov
- School of Chemistry University of Sydney 2006 Sydney New South Wales Australia
| | - Guochun Yang
- School of Chemistry University of Melbourne 3010 Parkville Victoria Australia
- Department of Physics Northeast Normal University 130024 Changchun China
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8
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Üngör Ö, Shatruk M. Transition metal complexes with fractionally charged TCNQ radical anions as structural templates for multifunctional molecular conductors. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Ishikawa R, Ueno S, Iguchi H, Breedlove BK, Yamashita M, Kawata S. Supramolecular self-assembled coordination architecture composed of a doubly bis(2-pyridyl)pyrazolate bridged dinuclear CuII complex and 7,7′,8,8′,-tetracyano-p-quinodimethanide radicals. CrystEngComm 2020. [DOI: 10.1039/c9ce01580a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A tetranuclear CuII complex composed of a doubly bpypz− bridged dinuclear CuII complex with TCNQ˙− self-assembles into a 3D supramolecular coordination architecture via complementary weak coordination bonding and π-stacking interactions.
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Affiliation(s)
- Ryuta Ishikawa
- Department of Chemistry
- Faculty of Science
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Shunya Ueno
- Department of Chemistry
- Faculty of Science
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Hiroaki Iguchi
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai
- Japan
| | - Brian K. Breedlove
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai
- Japan
| | - Masahiro Yamashita
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai
- Japan
| | - Satoshi Kawata
- Department of Chemistry
- Faculty of Science
- Fukuoka University
- Fukuoka 814-0180
- Japan
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10
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Tran MD, Lu J, Mai BV, Vo NT, Le HT, Bond AM, Martin LL. Electrochemical and Chemical Synthesis of [ZnTCNQF
4
(DMF)
2
]
·
2DMF – A 2D Network Coordination Polymer. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Manh D. Tran
- School of Chemistry Monash University 3800 Clayton, V IC Australia
- Department of Chemistry The University of Danang University of Science and Education Danang Vietnam
| | - Jinzhen Lu
- School of Chemistry Monash University 3800 Clayton, V IC Australia
| | - Bay V. Mai
- Department of Chemistry The University of Danang University of Science and Education Danang Vietnam
| | - Nguyen T. Vo
- School of Chemistry Monash University 3800 Clayton, V IC Australia
- Department of Chemistry The University of Danang University of Science and Education Danang Vietnam
| | - Hai T. Le
- Department of Chemistry The University of Danang University of Science and Education Danang Vietnam
| | - Alan M. Bond
- School of Chemistry Monash University 3800 Clayton, V IC Australia
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11
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Hawes CS, Ó Máille GM, Byrne K, Schmitt W, Gunnlaugsson T. Tetraarylpyrrolo[3,2-b]pyrroles as versatile and responsive fluorescent linkers in metal-organic frameworks. Dalton Trans 2018; 47:10080-10092. [PMID: 29999051 DOI: 10.1039/c8dt01784k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first examples of crystalline coordination polymers containing the tetraarylpyrrolo[3,2-b]pyrrole (TPP) fluorophore are presented. We have prepared three new TPP ligands L1, H2L2 and H2L3, containing nitrile, carboxylate and mixed imidazole-carboxylate donor functionality, respectively. The ligands themselves each show significant fluorescence in the solution phase, with the nitrile species exhibiting solvatofluorochromism and the two carboxylate-containing compounds exhibiting concentration-dependent emission colour suggesting aggregation processes in solution. Three 3-dimensional polymeric structures are then presented. The compound poly-[AgL12]SbF6·3THF·2H2O 1 is an eightfold-interpenetrated diamondoid material, while poly-[Zn4O(L2)3]·20DMA·10H2O 2 is a porous Metal-Organic Framework with pcu topology, and both 1 and 2 show notable luminescence in the solid state. Complex 2 readily undergoes guest exchange accompanied by a reversible switching in emission colour with no change in chemical structure. While complex poly-[CdL3]·2.5DMA·3.5H2O 3 is non-emissive, it displays a twofold interpenetrated pts topology with hexagonal symmetry and an extremely long hexagonal pitch of 100.3 Å, and shows an impressive 22 wt% CO2 uptake capacity at 278 K and 1 bar.
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Affiliation(s)
- Chris S Hawes
- School of Chemical and Physical Sciences, Keele University, Keele ST5 5BG, UK.
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