1
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Zhao ZH, Chen SY, Zhao PC, Luo WL, Luo YL, Zuo JL, Li CH. Mechanically Adaptive Polymers Constructed from Dynamic Coordination Equilibria. Angew Chem Int Ed Engl 2024; 63:e202400758. [PMID: 38450854 DOI: 10.1002/anie.202400758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/08/2024]
Abstract
Designing materials capable of adapting their mechanical properties in response to external stimuli is the key to preventing failure and extending their service life. However, existing mechanically adaptive polymers are hindered by limitations such as inadequate load-bearing capacity, difficulty in achieving reversible changes, high cost, and a lack of multiple responsiveness. Herein, we address these challenges using dynamic coordination bonds. A new type of mechanically adaptive material with both rate- and temperature-responsiveness was developed. Owing to the stimuli-responsiveness of the coordination equilibria, the prepared polymers, PBMBD-Fe and PBMBD-Co, exhibit mechanically adaptive properties, including temperature-sensitive strength modulation and rate-dependent impact hardening. Benefitting from the dynamic nature of the coordination bonds, the polymers exhibited impressive energy dissipation, damping capacity (loss factors of 1.15 and 2.09 at 1.0 Hz), self-healing, and 3D printing abilities, offering durable and customizable impact resistance and protective performance. The development of impact-resistant materials with comprehensive properties has potential applications in the sustainable and intelligent protection fields.
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Affiliation(s)
- Zi-Han Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Shi-Yi Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Pei-Chen Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Wen-Lin Luo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Yan-Long Luo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
- College of Science, Nanjing Forestry University, Nanjing, 210037, P. R. China
| | - Jing-Lin Zuo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Cheng-Hui Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
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2
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Sacligil I, Barney CW, Crosby AJ, Tew GN. Bond strength regime dictates stress relaxation behavior. SOFT MATTER 2022; 18:4937-4943. [PMID: 35730637 DOI: 10.1039/d2sm00499b] [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
Reconfigurable polymer networks are gaining interest for their potential applications as self-healing, recyclable, and stimuli-responsive smart materials. Relating the bond strength of dynamic interactions to material properties including stress relaxation time and modulus is crucial for smart material design. In this work, in situ crosslinked transition metal-terpyridine reconfigurable networks were utilized to modulate the characteristic network stress relaxation time, τR. The use of stress relaxation experiments rather than oscillatory frequency sweeps allowed for the measurement of network bond dynamics across a wider dynamic range than has been previously reported. The stress relaxation time was shown to be tunable by metal center, counterion, and crosslink density. Remarkably, the network crosslinked with covalent-like ruthenium chloride-terpyridine interaction, while having a longer τR, was qualitatively similar to the other metal-ligand networks. Furthermore, the relaxation time was independent of crosslink density in strongly bonded networks, allowing for independent tunability of modulus and τR. In contrast, increasing crosslink density reduced τR in networks crosslinked with weaker interactions.
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Affiliation(s)
- Ipek Sacligil
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts, MA 01003, USA.
| | - Christopher W Barney
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts, MA 01003, USA.
| | - Alfred J Crosby
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts, MA 01003, USA.
| | - Gregory N Tew
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts, MA 01003, USA.
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3
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A Low-Spin CoII/Nitroxide Complex for Distance Measurements at Q-Band Frequencies. MAGNETOCHEMISTRY 2022. [DOI: 10.3390/magnetochemistry8040043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pulse dipolar electron paramagnetic resonance spectroscopy (PDS) is continuously furthering the understanding of chemical and biological assemblies through distance measurements in the nanometer range. New paramagnets and pulse sequences can provide structural insights not accessible through other techniques. In the pursuit of alternative spin centers for PDS, we synthesized a low-spin CoII complex bearing a nitroxide (NO) moiety, where both the CoII and NO have an electron spin S of 1/2. We measured CoII-NO distances with the well-established double electron–electron resonance (DEER aka PELDOR) experiment, as well as with the five- and six-pulse relaxation-induced dipolar modulation enhancement (RIDME) spectroscopies at Q-band frequencies (34 GHz). We first identified challenges related to the stability of the complex in solution via DEER and X-ray crystallography and showed that even in cases where complex disproportionation is unavoidable, CoII-NO PDS measurements are feasible and give good signal-to-noise (SNR) ratios. Specifically, DEER and five-pulse RIDME exhibited an SNR of ~100, and while the six-pulse RIDME exhibited compromised SNR, it helped us minimize unwanted signals from the RIDME traces. Last, we demonstrated RIDME at a 10 μM sample concentration. Our results demonstrate paramagnetic CoII to be a feasible spin center in medium magnetic fields with opportunities for PDS studies involving CoII ions.
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4
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Breul K, Kissel S, Seiffert S. Sticker Multivalency in Metallo-supramolecular Polymer Networks. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01201] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Katharina Breul
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
| | - Sebastian Kissel
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
| | - Sebastian Seiffert
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
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5
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Duszczak J, Mituła K, Santiago-Portillo A, Soumoy L, Rzonsowska M, Januszewski R, Fusaro L, Aprile C, Dudziec B. Double-Decker Silsesquioxanes Self-Assembled in One-Dimensional Coordination Polymeric Nanofibers with Emission Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:22806-22818. [PMID: 33961397 PMCID: PMC8289186 DOI: 10.1021/acsami.1c02510] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 04/27/2021] [Indexed: 05/11/2023]
Abstract
The urgent needs for photoactive materials in industry drive fast evolution of synthetic procedures in many branches of chemistry, including the chemistry of silsesquioxanes. Here, we disclose an effective protocol for the synthesis of novel double-decker silsesquioxanes decorated with two (styrylethynylphenyl)terpyridine moieties (DDSQ_Ta-b). The synthesis strategy involves a series of silylative and Sonogashira coupling reactions and is reported for the first time. DDSQ_Ta-b were employed as nanocage ligands to promote self-assembly in the presence of transition metals (TM), i.e., Zn2+, Fe2+, and Eu3+ ions, to form one-dimensional (1D) coordination polymeric nanofibers. Additionally, ultraviolet-promoted and reversible E-Z isomerization of the C═C bond within the ligand structures may be exploited to tune their emission properties. These findings render such complexes promising candidates for applications in materials chemistry. This is the first example of 1D coordination polymers bearing DDSQ-based nodes with TM ions.
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Affiliation(s)
- Julia Duszczak
- Department
of Organometallic Chemistry, Faculty of Chemistry, Centre for Advanced
Technologies, Adam Mickiewicz University
in Poznan, Uniwersytetu Poznanskiego 8 and 10, 61-614 Poznan, Poland
| | - Katarzyna Mituła
- Department
of Organometallic Chemistry, Faculty of Chemistry, Centre for Advanced
Technologies, Adam Mickiewicz University
in Poznan, Uniwersytetu Poznanskiego 8 and 10, 61-614 Poznan, Poland
| | | | - Loraine Soumoy
- Department
of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Monika Rzonsowska
- Department
of Organometallic Chemistry, Faculty of Chemistry, Centre for Advanced
Technologies, Adam Mickiewicz University
in Poznan, Uniwersytetu Poznanskiego 8 and 10, 61-614 Poznan, Poland
| | - Rafał Januszewski
- Department
of Chemistry and Technology of Silicon Compounds, Faculty of Chemistry,
Centre for Advanced Technologies, Adam Mickiewicz
University in Poznan, Uniwersytetu Poznanskiego 8 and 10, 61-614 Poznan, Poland
| | - Luca Fusaro
- Department
of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Carmela Aprile
- Department
of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Beata Dudziec
- Department
of Organometallic Chemistry, Faculty of Chemistry, Centre for Advanced
Technologies, Adam Mickiewicz University
in Poznan, Uniwersytetu Poznanskiego 8 and 10, 61-614 Poznan, Poland
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6
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Yu CH, Chiang PY, Yeh YC. Di(2-picolyl)amine-functionalized poly(ethylene glycol) hydrogels with tailorable metal–ligand coordination crosslinking. Polym Chem 2021. [DOI: 10.1039/d1py01325d] [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 new class of metallo-hydrogels has been developed using di(2-picolyl)amine (DPA)-functionalized 4-arm polyethylene glycol (4A-PEG-DPAn) polymers crosslinked by metal–ligand coordination.
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Affiliation(s)
- Cheng-Hsuan Yu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Pei-Yu Chiang
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Yi-Cheun Yeh
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
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7
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Kumar Padhi S, Ahmad E, Rai S, Panda B. Kinetics and mechanistic study of electrocatalytic hydrogen evolution by [Co(Fc-tpy)2]2+. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114677] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Es Sayed J, Lorthioir C, Banet P, Perrin P, Sanson N. Reversible Assembly of Microgels by Metallo‐Supramolecular Chemistry. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Julien Es Sayed
- Soft Matter Sciences and Engineering ESPCI PSL University Sorbonne Université CNRS 10 rue Vauquelin 75231 Paris Cedex 05 France
| | - Cédric Lorthioir
- Laboratoire de Chimie de la Matière Condensée de Paris Sorbonne Université CNRS Collège de France 4 Place Jussieu 75005 Paris Cedex 05 France
| | - Philippe Banet
- Laboratoire de Physicochimie des Polymères et des Interfaces CY Cergy Paris Université 5 Mail Gay Lussac, Site de Neuville 95000 Cergy Pontoise Cedex France
| | - Patrick Perrin
- Soft Matter Sciences and Engineering ESPCI PSL University Sorbonne Université CNRS 10 rue Vauquelin 75231 Paris Cedex 05 France
| | - Nicolas Sanson
- Soft Matter Sciences and Engineering ESPCI PSL University Sorbonne Université CNRS 10 rue Vauquelin 75231 Paris Cedex 05 France
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9
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Es Sayed J, Lorthioir C, Banet P, Perrin P, Sanson N. Reversible Assembly of Microgels by Metallo‐Supramolecular Chemistry. Angew Chem Int Ed Engl 2020; 59:7042-7048. [DOI: 10.1002/anie.201915737] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/18/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Julien Es Sayed
- Soft Matter Sciences and Engineering ESPCI PSL University Sorbonne Université CNRS 10 rue Vauquelin 75231 Paris Cedex 05 France
| | - Cédric Lorthioir
- Laboratoire de Chimie de la Matière Condensée de Paris Sorbonne Université CNRS Collège de France 4 Place Jussieu 75005 Paris Cedex 05 France
| | - Philippe Banet
- Laboratoire de Physicochimie des Polymères et des Interfaces CY Cergy Paris Université 5 Mail Gay Lussac, Site de Neuville 95000 Cergy Pontoise Cedex France
| | - Patrick Perrin
- Soft Matter Sciences and Engineering ESPCI PSL University Sorbonne Université CNRS 10 rue Vauquelin 75231 Paris Cedex 05 France
| | - Nicolas Sanson
- Soft Matter Sciences and Engineering ESPCI PSL University Sorbonne Université CNRS 10 rue Vauquelin 75231 Paris Cedex 05 France
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10
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Majee K, Padhi SK. Ligand dechelation effect on a [Co(tpy)2]2+ scaffold towards electro-catalytic proton and water reduction. NEW J CHEM 2019. [DOI: 10.1039/c8nj05712e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This study presents the synthesis of the 4-(2,6-di(pyridin-2-yl)pyridin-4-yl)quinoline (4Ql-tpy) ligand and H2 evolution by corresponding cobalt complex, i.e. [Co(4Ql-tpy)2]Cl2.
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Affiliation(s)
- Karunamay Majee
- Artificial Photosynthesis Laboratory
- Department of Applied Chemistry
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Laboratory
- Department of Applied Chemistry
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
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11
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Higgins RF, Livesay BN, Ozumerzifon TJ, Joyce JP, Rappé AK, Shores MP. A family of related Co(II) terpyridine compounds exhibiting field induced single-molecule magnet properties. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.10.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Gutierres A, Pascual S, Fontaine L, Piogé S, Benyahia L. The effect of metal ions on the viscoelastic properties of thermosensitive sol-to-gel reversible metallo-supramolecular hydrogels. Polym Chem 2018. [DOI: 10.1039/c7py02118f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fine-tuning of thermo-induced assembly and rheological behaviour of hydrogels based on a copolymer having two distinct hydrophilic blocks via metal ions.
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Affiliation(s)
- A. Gutierres
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - S. Pascual
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - L. Fontaine
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - S. Piogé
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - L. Benyahia
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS Le Mans Université
- 72085 Le Mans Cedex 9
- France
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13
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Ahmad E, Majee K, Patel J, Das B, Padhi SK. Competent Electrocatalytic and Photocatalytic Proton Reduction by a Dechelated [Co(tpy)2
]2+
Scaffold. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700628] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ejaz Ahmad
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| | - Karunamay Majee
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| | - Jully Patel
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| | - Babulal Das
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Assam India
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
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14
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Carbonell E, Bivona LA, Fusaro L, Aprile C. Silsesquioxane–Terpyridine Nano Building Blocks for the Design of Three-Dimensional Polymeric Networks. Inorg Chem 2017; 56:6393-6403. [DOI: 10.1021/acs.inorgchem.7b00471] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Esther Carbonell
- Unit of Nanomaterial Chemistry (CNano),
Department of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Lucia A. Bivona
- Unit of Nanomaterial Chemistry (CNano),
Department of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Luca Fusaro
- Unit of Nanomaterial Chemistry (CNano),
Department of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Carmela Aprile
- Unit of Nanomaterial Chemistry (CNano),
Department of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
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15
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Brassinne J, Fustin CA, Gohy JF. Control over the assembly and rheology of supramolecular networks via multi-responsive double hydrophilic copolymers. Polym Chem 2017. [DOI: 10.1039/c6py02143c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An orthogonal control over network formation and dynamics is achieved in metallo-supramolecular micellar gels via multi-responsive double hydrophilic copolymers.
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Affiliation(s)
- Jérémy Brassinne
- Institute of Condensed Matter and Nanosciences (IMCN)
- Division of Bio and Soft Matter (BSMA)
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Charles-André Fustin
- Institute of Condensed Matter and Nanosciences (IMCN)
- Division of Bio and Soft Matter (BSMA)
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Jean-François Gohy
- Institute of Condensed Matter and Nanosciences (IMCN)
- Division of Bio and Soft Matter (BSMA)
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
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16
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Munzert SM, Schwarz G, Kurth DG. Kinetic Studies of the Coordination of Mono- and Ditopic Ligands with First Row Transition Metal Ions. Inorg Chem 2016; 55:2565-73. [PMID: 26908136 DOI: 10.1021/acs.inorgchem.5b02931] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of the ditopic ligand 1,4-bis(2,2':6',2″-terpyridin-4'-yl)benzene (1) as well as the monotopic ligands 4'-phenyl-2,2':6',2″-terpyridine (2) and 2,2':6',2″-terpyridine (3) with Fe(2+), Co(2+), and Ni(2+) in solution are studied. While the reaction of 1 with Fe(2+), Co(2+), and Ni(2+) results in metallo-supramolecular coordination polyelectrolytes (MEPEs), ligands 2 and 3 give mononuclear complexes. All compounds are analyzed by UV/vis and fluorescence spectroscopy. Fluorescence spectroscopy indicates that protonation as well as coordination to Zn(2+) leads to an enhanced fluorescence of the terpyridine ligands. In contrast, Fe(2+), Co(2+), or Ni(2+) quench the fluorescence of the ligands. The kinetics of the reactions are studied by stopped-flow fluorescence spectroscopy. Analysis of the measured data is presented and the full kinetic rate laws for the coordination of the terpyridine ligands 1, 2, and 3 to Fe(2+), Co(2+), and Ni(2+) are presented. The coordination occurs within a few seconds, and the rate constant increases in the order Ni(2+) < Co(2+) < Fe(2+). With the rate constants at hand, the polymer growth of Ni-MEPE is computed.
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Affiliation(s)
- Stefanie Martina Munzert
- Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg , Röntgenring 11, D-97070 Würzburg, Germany
| | - Guntram Schwarz
- Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg , Röntgenring 11, D-97070 Würzburg, Germany
| | - Dirk G Kurth
- Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg , Röntgenring 11, D-97070 Würzburg, Germany
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17
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Joshi K, Krishnamurty S, Singh I, Selvaraj K. A DFT based assay for tailor-made terpyridine ligand–metal complexation properties. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1067368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Elgrishi N, Chambers MB, Fontecave M. Turning it off! Disfavouring hydrogen evolution to enhance selectivity for CO production during homogeneous CO 2 reduction by cobalt-terpyridine complexes. Chem Sci 2015; 6:2522-2531. [PMID: 28706660 PMCID: PMC5489026 DOI: 10.1039/c4sc03766a] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 02/18/2015] [Indexed: 12/21/2022] Open
Abstract
Understanding the activity and selectivity of molecular catalysts for CO2 reduction to fuels is an important scientific endeavour in addressing the growing global energy demand. Cobalt-terpyridine compounds have been shown to be catalysts for CO2 reduction to CO while simultaneously producing H2 from the requisite proton source. To investigate the parameters governing the competition for H+ reduction versus CO2 reduction, the cobalt bisterpyridine class of compounds is first evaluated as H+ reduction catalysts. We report that electronic tuning of the ancillary ligand sphere can result in a wide range of second-order rate constants for H+ reduction. When this class of compounds is next submitted to CO2 reduction conditions, a trend is found in which the less active catalysts for H+ reduction are the more selective towards CO2 reduction to CO. This represents the first report of the selectivity of a molecular system for CO2 reduction being controlled through turning off one of the competing reactions. The activities of the series of catalysts are evaluated through foot-of-the-wave analysis and a catalytic Tafel plot is provided.
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Affiliation(s)
- Noémie Elgrishi
- Laboratoire de Chimie des Processus Biologiques , UMR 8229 CNRS , UPMC Univ Paris 06 , Collège de France , 11 Place Marcelin Berthelot , 75231 Paris Cedex 05 , France . ; ; Tel: +33 1 44271360
| | - Matthew B Chambers
- Laboratoire de Chimie des Processus Biologiques , UMR 8229 CNRS , UPMC Univ Paris 06 , Collège de France , 11 Place Marcelin Berthelot , 75231 Paris Cedex 05 , France . ; ; Tel: +33 1 44271360
| | - Marc Fontecave
- Laboratoire de Chimie des Processus Biologiques , UMR 8229 CNRS , UPMC Univ Paris 06 , Collège de France , 11 Place Marcelin Berthelot , 75231 Paris Cedex 05 , France . ; ; Tel: +33 1 44271360
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19
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Mengel AKC, Förster C, Breivogel A, Mack K, Ochsmann JR, Laquai F, Ksenofontov V, Heinze K. A Heteroleptic Push-Pull Substituted Iron(II) Bis(tridentate) Complex with Low-Energy Charge-Transfer States. Chemistry 2014; 21:704-14. [DOI: 10.1002/chem.201404955] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Indexed: 11/06/2022]
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20
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Wang R, Geven M, Dijkstra PJ, Martens P, Karperien M. Hydrogels by supramolecular crosslinking of terpyridine end group functionalized 8-arm poly(ethylene glycol). SOFT MATTER 2014; 10:7328-7336. [PMID: 25088281 DOI: 10.1039/c4sm01162g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Metallo supramolecular assemblies of an 8-arm poly(ethylene glycol) partially substituted with terpyridyl end-groups and the transition metal ions Ni(2+), Fe(2+), Co(2+) and Zn(2+) were studied for their nano-particle formation at dilute conditions and gelation at higher concentrations. The large differences in dissociation rate constants of the metal ligand complexes largely determine the assembly behavior. Thermodynamically stable complexes are generated with Ni(2+) and Fe(2+) chlorides, which lead to distinct particle sizes of ∼200 nm in dilute conditions. The Co(2+) and Zn(2+) chlorides provide multiple size distributions revealing that mono and bis-complexes are present at equilibrium. Upon complexation, terpyridyl groups move to the outer sphere giving aggregates with a charged surface. At polymer concentrations above 5 wt%, crosslinking upon addition of transition metal ions provides hydrogels. Elastic hydrogels were obtained with Ni(2+), Fe(2+) and Co(2+) having storage moduli in excess of 20 kPa, whereas Zn(2+) gels are relatively viscous. Only Zn(2+) gels show a thermoreversible sol to gel transition at a temperature of 25 °C independent of polymer concentration.
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Affiliation(s)
- Rong Wang
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Developmental Bioengineering, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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