1
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Aslam AS, Muhammad LM, Erbs Hillers-Bendtsen A, Mikkelsen KV, Moth-Poulsen K. Norbornadiene-Quadricyclane Photoswitches with Enhanced Solar Spectrum Match. Chemistry 2024; 30:e202401430. [PMID: 38825835 DOI: 10.1002/chem.202401430] [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: 04/13/2024] [Revised: 05/23/2024] [Accepted: 06/01/2024] [Indexed: 06/04/2024]
Abstract
Herein, we report monomeric and dimeric norbornadiene-quadricyclane molecular photoswitch systems intended for molecular solar thermal applications. A series of six new norbornadiene derivatives conjugated with benzothiadiazole as the acceptor unit and dithiafulvene as the donor unit were synthesized and fully characterized. The photoswitches were evaluated by experimentally and theoretically measuring optical absorption profiles and thermal conversion of quadricyclane to norbornadiene. Computational insight by density functional theory calculations at the M06-2X/def2-SVPD level of theory provided geometries, storage energies, UV-vis absorption spectra, and HOMO-LUMO levels that are used to describe the function of the molecular systems. The studied molecules exhibit absorption onset ranging from 416 nm to 595 nm due to a systemic change in their donor-acceptor character. This approach was advantageous due to the introduction of benzothiadiazole and the dimeric nature of molecular structures. The best-performing system has a half-life of 3 days with quantum yields over 50 %.
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Affiliation(s)
- Adil S Aslam
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296, Gothenburg, Sweden
| | - Lidiya M Muhammad
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296, Gothenburg, Sweden
| | | | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296, Gothenburg, Sweden
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 10-14, 08019, Barcelona, Spain
- The Institute of Materials Science of Barcelona, ICMAB-CSIC, Bellaterra, Barcelona, 08193, Spain
- Catalan Institution for Research & Advanced Studies, ICREA, Pg. Llu'ıs Companys 23, Barcelona, Spain
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2
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Weber RR, Stindt CN, van der Harten AMJ, Feringa BL. Push-Pull Bis-Norbornadienes for Solar Thermal Energy Storage. Chemistry 2024; 30:e202400482. [PMID: 38519425 DOI: 10.1002/chem.202400482] [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: 02/02/2024] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 03/24/2024]
Abstract
The norbornadiene/quadricyclane (NBD/QC) photoswitch pair represents a promising system for application in molecular solar thermal energy storage (MOST). Often, the NBD derivatives have very limited overlap with the solar spectrum, and substitution to redshift the absorption leads to a decrease in the gravimetric energy density. Dimeric systems mitigate this factor because two switches can 'share' a substituent. Here, we present five new NBD dimers with red-shifted absorption spectra. One dimer features the most red-shifted absorption onset (539 nm) and a significantly red-shifted absorption maximum (404 nm) for NBD systems reported so far, without compromising thermal half-life. Promising properties for high-performance MOST applications are demonstrated, such as high absorption onsets reaching 539 nm, and energy densities of 379 kJ/kg, while still maintaining long half-lives of the metastable isomer, up to 23 hours at 25 °C.
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Affiliation(s)
- Roza R Weber
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands
| | - Charlotte N Stindt
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands
| | - A M J van der Harten
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands
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3
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Hemauer F, Steinrück HP, Papp C. The Norbornadiene/Quadricyclane Pair as Molecular Solar Thermal Energy Storage System: Surface Science Investigations. Chemphyschem 2024; 25:e202300806. [PMID: 38375756 DOI: 10.1002/cphc.202300806] [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: 10/30/2023] [Revised: 02/19/2024] [Accepted: 02/19/2024] [Indexed: 02/21/2024]
Abstract
For the transition to renewable energy sources, novel energy storage materials are more important than ever. This review addresses so-called molecular solar thermal (MOST) systems, which appear very promising since they combine light harvesting and energy storing in one-photon one-molecule processes. The focus is on norbornadiene (NBD), a particularly interesting candidate, which is converted to the strained valence isomer quadricyclane (QC) upon irradiation. The stored energy can be released on demand. The energy-releasing cycloreversion from QC to NBD can be initiated by a thermal, catalytic, or electrochemical trigger. The reversibility of the energy storage and release cycles determines the general practicality of a MOST system. In the search for derivatives, which enable large-scale applications, fundamental surface science studies help to assess the feasibility of potential substituted NBD/QC couples. We include investigations under well-defined ultra-high vacuum (UHV) conditions as well as experiments in liquid phase. Next to the influence of the catalytically active surfaces on the isomerization between the two valence isomers, information on adsorption geometries, thermal stability limits, and reaction pathways of the respective molecules are discussed. Moreover, laboratory-scaled test devices demonstrate the proof of concept in various areas of application.
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Affiliation(s)
- Felix Hemauer
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
- Angewandte Physikalische Chemie, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany
| | - Hans-Peter Steinrück
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
- Erlangen Center for Interface Research and Catalysis (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Christian Papp
- Angewandte Physikalische Chemie, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany
- Erlangen Center for Interface Research and Catalysis (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
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4
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Salthouse RJ, Moth-Poulsen K. Multichromophoric photoswitches for solar energy storage: from azobenzene to norbornadiene, and MOST things in between. JOURNAL OF MATERIALS CHEMISTRY. A 2024; 12:3180-3208. [PMID: 38327567 PMCID: PMC10846599 DOI: 10.1039/d3ta05972c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 01/10/2024] [Indexed: 02/09/2024]
Abstract
The ever-increasing global demands for energy supply and storage have led to numerous research efforts into finding and developing renewable energy technologies. Molecular solar thermal energy storage (MOST) systems utilise molecular photoswitches that can be isomerized to a metastable high-energy state upon solar irradiation. These high-energy isomers can then be thermally or catalytically converted back to their original state, releasing the stored energy as heat on-demand, offering a means of emission-free energy storage from a closed system, often from only organic materials. In this context, multichromophoric systems which incorporate two or more photochromic units may offer additional functionality over monosubstituted analogues, due to their potential to access multiple states as well as having more attractive physical properties. The extended conjugation offered by these systems can lead to a red shift in the absorption profile and hence a better overlap with the solar spectrum. Additionally, the multichromophoric design may lead to increased energy storage densities due to some of the molecular weight being 'shared' across several energy storage units. This review provides an overview and analysis of multichromophoric photoswitches incorporating the norbornadiene/quadricyclane (NBD/QC) couple, azobenzene (AZB), dihydroazulene (DHA) and diarylethene (DAE) systems, in the context of energy storage applications. Mixed systems, where two or more different chromophores are linked together in one molecule, are also discussed, as well as limitations such as the loss of photochromism due to inner filter effects or self-quenching, and how these challenges may be overcome in future designs of multichromophoric systems.
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Affiliation(s)
- Rebecca J Salthouse
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, EEBE Eduard Maristany 16 08019 Barcelona Spain
| | - Kasper Moth-Poulsen
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, EEBE Eduard Maristany 16 08019 Barcelona Spain
- Catalan Institution for Research & Advanced Studies, ICREA Pg. Llu'ıs Companys 23 Barcelona Spain
- Institute of Materials Science of Barcelona, ICMAB-CSIC Bellaterra Barcelona 08193 Spain
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemivagen 4 Gothenburg 412 96 Sweden
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5
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Hillers-Bendtsen AE, Zhou Y, Mikkelsen KV. Investigation of Solvent Effects on the Molecular Energy Storage and Optical Properties of Bicyclooctadiene/Tetracyclooctane Photoswitches. J Phys Chem A 2024; 128:41-50. [PMID: 38152898 DOI: 10.1021/acs.jpca.3c04760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
In this paper, we investigate the effects of solvation on the solar energy storage properties of bicyclooctadiene/tetracyclooctane (BOD/TCO) photoswitches. The solvent effects on the thermochemical and optical properties are studied in cyclohexane, toluene, dichloromethane, ethanol, acetonitrile, and a vacuum using density functional theory and coupled cluster theory. Our results show that the energy storage capacity of the BOD/TCO system increases as the solvent polarity increases, and the change is more significant with an unsubstituted system. The energy storage capacity of the substituted system is not dependent on the polarity of the solvent. As the solvent polarity increases, the absorption peaks shift away from each other and the absorption intensities increase. Overall, the solvents improve the performance of the optical properties and the energy storage capacities of the BOD/TCO molecular solar thermal systems.
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Affiliation(s)
| | - Yiwei Zhou
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
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6
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Zika W, Leng A, Weiß R, Pintér S, Schüßlbauer CM, Clark T, Hirsch A, Guldi DM. Driving the quadricyclane-to-norbornadiene isomerization by charge separation with perylenediimide as electron acceptor. Chem Sci 2023; 14:11096-11104. [PMID: 37860652 PMCID: PMC10583742 DOI: 10.1039/d3sc03679k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023] Open
Abstract
Through comprehensive photo-assays, this study investigates the reaction coordinate governing the interconversion between quadricyclane (QC) and norbornadiene (NBD) upon photo-irradiation up to a wavelength of 550 nm. To harness this spectroscopic range for energy release, we link the NBD-core with a highly electron-accepting perylenediimide (PDI) with broad absorption, achieving strong electronic coupling between them. We detail the successful synthesis and present extensive DFT calculations to determine the amount of stored energy. By means of transient absorption spectroscopy, an oxidative electron transfer is observed during the QC-to-NBD isomerization following the initial PDI photoexcitation. This charge-separated state is key to triggering the back-isomerization with visible light excitation.
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Affiliation(s)
- Wiebke Zika
- Department of Physical Chemistry I, Friedrich-Alexander-Universität Egerlandstraße 3 91058 Erlangen Germany
| | - Andreas Leng
- Department of Organic Chemistry II, Friedrich-Alexander-Universität Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - René Weiß
- Department of Physical Chemistry I, Friedrich-Alexander-Universität Egerlandstraße 3 91058 Erlangen Germany
| | - Simone Pintér
- Department of Physical Chemistry I, Friedrich-Alexander-Universität Egerlandstraße 3 91058 Erlangen Germany
| | - Christoph M Schüßlbauer
- Department of Physical Chemistry I, Friedrich-Alexander-Universität Egerlandstraße 3 91058 Erlangen Germany
| | - Timothy Clark
- Computer Chemistry Center, Friedrich-Alexander-Universität Nägelsbachstraße 25 91052 Erlangen Germany
| | - Andreas Hirsch
- Department of Organic Chemistry II, Friedrich-Alexander-Universität Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Dirk M Guldi
- Department of Physical Chemistry I, Friedrich-Alexander-Universität Egerlandstraße 3 91058 Erlangen Germany
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7
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Schulte R, Afflerbach S, Paululat T, Ihmels H. Bis- and Tris-norbornadienes with High Energy Densities for Efficient Molecular Solar Thermal Energy Storage. Angew Chem Int Ed Engl 2023; 62:e202309544. [PMID: 37504899 DOI: 10.1002/anie.202309544] [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: 07/05/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 07/29/2023]
Abstract
Molecular solar thermal energy storage (MOST) systems can convert, store and release solar energy in chemical bonds, i.e., as chemical energy. In this work, phenyl- and naphthyl-linked bis- and tris-norbornadienes are presented as promising MOST systems with very high energy densities. The substrates were synthesized by Suzuki-Miyaura coupling reactions and their absorption properties and characteristic parameters for MOST applications were investigated. The norbornadiene derivatives showed absorption onsets of up to 386 nm and photoisomerization quantum yields of 56 % per photoisomerization event. The resulting quadricyclane products have half-lifes up to 14 d and very high energy densities of up to 734 kJ/kg. Overall, these norbornadienes fulfill necessary criteria for an optimal MOST system and are, therefore, a highly promising basis for the development of materials for efficient solar energy conversion and storage.
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Affiliation(s)
- Robin Schulte
- Department of Chemistry-Biology, Center of Micro- and Nanochemistry and (Bio-)Technology (Cμ), University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Sandra Afflerbach
- Chair of Thermal and Thermochemical Energy Storage, Technische Universität Berlin, KT2, Marchstrasse 18, 10587, Berlin, Germany
| | - Thomas Paululat
- Department of Chemistry-Biology, Center of Micro- and Nanochemistry and (Bio-)Technology (Cμ), University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Heiko Ihmels
- Department of Chemistry-Biology, Center of Micro- and Nanochemistry and (Bio-)Technology (Cμ), University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
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8
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Elholm JL, Liasi Z, Mikkelsen MK, Hillers-Bendtsen AE, Mikkelsen KV. Computational investigation of photoswitch conjugates for molecular solar energy storage. Phys Chem Chem Phys 2023; 25:21964-21969. [PMID: 37554092 DOI: 10.1039/d3cp02555a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Solar energy conversion and storage are vital for combating climate change. Molecular solar thermal systems offer a promising solution, where energy is stored in molecular compounds. This study investigates dyad molecular photoswitches by combining bicyclooctadiene/tetracyclooctane and dihydroazulene/vinylheptafulvene systems with phenyl and cyano groups. Density functional theory calculations were employed to determine molecular properties and consider solvation effects in toluene and dichloromethane. The results show that the combined systems have a predicted storage energy of up to 206.14 kJ mol-1 and an absorption peak at 390.26 nm with appreciable intensity. These dyad photoswitches exhibit favorable properties for molecular solar thermal storage and other applications. A comparison with individual photoswitches reveals advantages and disadvantages. The most effective conjugate has a slightly lower storage density than an equal mixture of individual systems, but it demonstrates better absorption characteristics, with improved overlap with the solar spectrum and higher absorption intensity. These findings contribute to the understanding of dyad molecular photoswitches, showcasing their potential for advanced energy storage and conversion technologies.
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Affiliation(s)
- Jacob Lynge Elholm
- The Institute of Materials Science of Barcelona, ICMAB-CSIC, Bellaterra, 08193 Barcelona, Spain
| | - Zacharias Liasi
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
| | - Marie Kathrine Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
| | | | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
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9
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Hernández F, Cox JM, Li J, Crespo-Otero R, Lopez SA. Multiconfigurational Calculations and Photodynamics Describe Norbornadiene Photochemistry. J Org Chem 2023; 88:5311-5320. [PMID: 37022327 PMCID: PMC10629221 DOI: 10.1021/acs.joc.2c02758] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Indexed: 04/07/2023]
Abstract
Storing solar energy is a vital component of using renewable energy sources to meet the growing demands of the global energy economy. Molecular solar thermal (MOST) energy storage is a promising means to store solar energy with on-demand energy release. The light-induced isomerization reaction of norbornadiene (NBD) to quadricyclane (QC) is of great interest because of the generally high energy storage density (0.97 MJ kg-1) and long thermal reversion lifetime (t1/2,300K = 8346 years). However, the mechanistic details of the ultrafast excited-state [2 + 2]-cycloaddition are largely unknown due to the limitations of experimental techniques in resolving accurate excited-state molecular structures. We now present a full computational study on the excited-state deactivation mechanism of NBD and its dimethyl dicyano derivative (DMDCNBD) in the gas phase. Our multiconfigurational calculations and nonadiabatic molecular dynamics simulations have enumerated the possible pathways with 557 S2 trajectories of NBD for 500 fs and 492 S1 trajectories of DMDCNBD for 800 fs. The simulations predicted the S2 and S1 lifetimes of NBD (62 and 221 fs, respectively) and the S1 lifetime of DMDCNBD (190 fs). The predicted quantum yields of QC and DCQC are 10 and 43%, respectively. Our simulations also show the mechanisms of forming other possible reaction products and their quantum yields.
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Affiliation(s)
- Federico
J. Hernández
- School
of Physical and Chemical Sciences, Queen
Mary University of London, Mile End Road, London E1 4NS, U.K.
| | - Jordan M. Cox
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
| | - Jingbai Li
- Hoffmann
Institute of Advanced Materials, Shenzhen
Polytechnic, 7098 Liuxian Blvd, Nanshan District, Shenzhen 518055, People’s
Republic of China
| | - Rachel Crespo-Otero
- School
of Physical and Chemical Sciences, Queen
Mary University of London, Mile End Road, London E1 4NS, U.K.
| | - Steven A. Lopez
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
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10
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Hemauer F, Schwaab V, Freiberger EM, Waleska NJ, Leng A, Weiß C, Steinhauer J, Düll F, Bachmann P, Hirsch A, Steinrück HP, Papp C. Surface Studies on the Energy Release of the MOST System 2-Carbethoxy-3-Phenyl-Norbornadiene/Quadricyclane (PENBD/PEQC) on Pt(111) and Ni(111). Chemistry 2023; 29:e202203759. [PMID: 36840687 DOI: 10.1002/chem.202203759] [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: 12/01/2022] [Revised: 02/23/2023] [Accepted: 02/23/2023] [Indexed: 02/26/2023]
Abstract
Novel energy-storage solutions are necessary for the transition from fossil to renewable energy sources. Auspicious candidates are so-called molecular solar thermal (MOST) systems. In our study, we investigate the surface chemistry of a derivatized norbornadiene/quadricyclane molecule pair. By using suitable push-pull substituents, a bathochromic shift of the absorption onset is achieved, allowing a greater overlap with the solar spectrum. Specifically, the adsorption and thermally induced reactions of 2-carbethoxy-3-phenyl-norbornadiene/quadricyclane are assessed on Pt(111) and Ni(111) as model catalyst surfaces by synchrotron radiation-based X-ray photoelectron spectroscopy (XPS). Comparison of the respective XP spectra enables the distinction of the energy-rich molecule from its energy-lean counterpart and allows qualitative information on the adsorption motifs to be derived. Monitoring the quantitative cycloreversion between 140 and 230 K spectroscopically demonstrates the release of the stored energy to be successfully triggered on Pt(111). Heating to above 300 K leads to fragmentation of the molecular framework. On Ni(111), no conversion of the energy-rich compound takes place. The individual decomposition pathways of the two isomers begin at 160 and 180 K, respectively. Pronounced desorption of almost the entire surface coverage only occurs for the energy-lean molecule on Ni(111) above 280 K; this suggests weakly bound species. The correlation between adsorption motif and desorption behavior is important for applications of MOST systems in heterogeneously catalyzed processes.
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Affiliation(s)
- Felix Hemauer
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Valentin Schwaab
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Eva Marie Freiberger
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Natalie J Waleska
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Andreas Leng
- Lehrstuhl für Organische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany
| | - Cornelius Weiß
- Lehrstuhl für Organische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany
| | - Johann Steinhauer
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Fabian Düll
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Philipp Bachmann
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Andreas Hirsch
- Lehrstuhl für Organische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany
| | - Hans-Peter Steinrück
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
- Erlangen Center for Interface Research and Catalysis (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Christian Papp
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
- Erlangen Center for Interface Research and Catalysis (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
- Physikalische und Theoretische Chemie, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany
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11
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Gödtel P, Starrett J, Pianowski ZL. Heterocyclic Hemipiperazines: Water-Compatible Peptide-Derived Photoswitches. Chemistry 2023; 29:e202204009. [PMID: 36790823 DOI: 10.1002/chem.202204009] [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: 12/22/2022] [Revised: 02/11/2023] [Accepted: 02/15/2023] [Indexed: 02/16/2023]
Abstract
Hemipiperazines are a recently discovered class of peptide-derived molecular photoswitches with high biocompatibility and therapeutic potential. Here, for the first time we describe photochromism of heterocyclic hemipiperazines. They demonstrate long thermal lifetimes, and enlarged band separation between photoisomers. Efficient photoisomerization occurs under aqueous conditions, although with a need for organic co-solvent. Bidirectional switching with visible light is observed for an extended aromatic system.
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Affiliation(s)
- Peter Gödtel
- Institute of Organic Chemistry, Karlsruhe Institute of Technology KIT, 76131, Karlsruhe, Germany
| | - Jessica Starrett
- Institute of Organic Chemistry, Karlsruhe Institute of Technology KIT, 76131, Karlsruhe, Germany
| | - Zbigniew L Pianowski
- Institute of Organic Chemistry, Karlsruhe Institute of Technology KIT, 76131, Karlsruhe, Germany
- Institute of Biological and Chemical Systems - FMS, Karlsruhe Institute of Technology KIT, 76344, Eggenstein-Leopoldshafen, Germany
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12
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Hemauer F, Bauer U, Fromm L, Weiß C, Leng A, Bachmann P, Düll F, Steinhauer J, Schwaab V, Grzonka R, Hirsch A, Görling A, Steinrück HP, Papp C. Surface Chemistry of the Molecular Solar Thermal Energy Storage System 2,3-Dicyano-Norbornadiene/Quadricyclane on Ni(111). Chemphyschem 2022; 23:e202200199. [PMID: 35612821 PMCID: PMC9544604 DOI: 10.1002/cphc.202200199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/23/2022] [Indexed: 11/26/2022]
Abstract
Molecular solar thermal (MOST) systems are a promising approach for the introduction of sustainable energy storage solutions. We investigated the feasibility of the dicyano‐substituted norbornadiene/quadricyclane molecule pair on Ni(111) for catalytic model studies. This derivatization is known to lead to a desired bathochromic shift of the absorption maximum of the parent compound. In our experiments further favorable properties were found: At low temperatures, both molecules adsorb intact without any dissociation. In situ temperature‐programmed HR‐XPS experiments reveal the conversion of (CN)2‐quadricyclane to (CN)2‐norbornadiene under energy release between 175 and 260 K. The absence of other surface species due to side reactions indicates full isomerization. Further heating leads to the decomposition of the molecular framework into smaller carbonaceous fragments above 290 K and finally to amorphous structures, carbide and nitride above 400 K. DFT calculations gave insights into the adsorption geometries. (CN)2‐norbornadiene is expected to interact stronger with the surface, with flat configurations being favorable. (CN)2‐quadricyclane exhibits smaller adsorption energies with negligible differences for flat and side‐on geometries. Simulated XP spectra are in good agreement with experimental findings further supporting the specific spectroscopic fingerprints for both valence isomers.
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Affiliation(s)
- Felix Hemauer
- Friedrich Alexander University Erlangen Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Egerlandstr. 3,, 91058, Erlangen, GERMANY
| | - Udo Bauer
- Friedrich-Alexander University Erlangen-Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department für Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Lukas Fromm
- Friedrich-Alexander University Erlangen-Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Departmentchemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Cornelius Weiß
- Friedrich-Alexander University Erlangen-Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, GERMANY
| | - Andreas Leng
- Friedrich Alexander University Erlangen Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, GERMANY
| | - Phillipp Bachmann
- Friedrich Alexander University Erlangen Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangn, GERMANY
| | - Fabian Düll
- Friedrich-Alexander-Universität Erlangen-Nürnberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Johann Steinhauer
- Friedrich-Alexander-Universität Erlangen-Nürnberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Valentin Schwaab
- Friedrich-Alexander-Universität Erlangen-Nürnberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Deaprtment Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Robert Grzonka
- Friedrich Alexander University Erlangen Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Andreas Hirsch
- Friedrich-Alexander-Universität Erlangen-Nürnberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, GERMANY
| | - Andreas Görling
- Friedrich Alexander University Erlangen Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharamzie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Hans-Peter Steinrück
- Friedrich Alexander University Erlangen Nuremberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Department Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
| | - Christian Papp
- Universitaet Erlangen-Nuernberg, Department Chemie und Pharmazie, Egerlandstr. 3, 91058, Erlangen, GERMANY
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13
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Hillers-Bendtsen AE, Iuel Lunøe Dünweber PG, Olsen LH, Mikkelsen KV. Prospects of Improving Molecular Solar Energy Storage of the Norbornadiene/Quadricyclane System through Bridgehead Modifications. J Phys Chem A 2022; 126:2670-2676. [PMID: 35467862 DOI: 10.1021/acs.jpca.2c00950] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have investigated novel bicyclic diene molecular solar thermal energy storage systems that presently are the ones with the highest predicted energy density. Using a variety of different ab initio quantum chemical methods, we report storage energies, absorption spectra, and reaction barriers for the release of stored energy for a series of bicyclic dienes. The bicyclic dienes are all constructed by modifying the bridgehead of the well-known norbornadiene/quadricyclane (NBD/QC) system. In conclusion, we find it promising that it is possible to significantly amplify the storage energy of the NBD/QC system without seriously compromising other crucial properties by introducing simple modifications to the bridgehead.
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Affiliation(s)
| | | | - Lars Henrik Olsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
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14
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Leistner AL, Pianowski Z. Smart photochromic materials triggered with visible light. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101271] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anna-Lena Leistner
- KIT: Karlsruher Institut fur Technologie Institute of Organic Chemistry Fritz-Haber-Weg 6 76131 Karlsruhe GERMANY
| | - Zbigniew Pianowski
- Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften Institute of Organic Chemistry Fritz-Haber-Weg 6 76131 Karlsruhe GERMANY
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15
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Quant M, Hillers-Bendtsen AE, Ghasemi S, Erdelyi M, Wang Z, Muhammad LM, Kann N, Mikkelsen KV, Moth-Poulsen K. Synthesis, characterization and computational evaluation of bicyclooctadienes towards molecular solar thermal energy storage. Chem Sci 2022; 13:834-841. [PMID: 35173948 PMCID: PMC8768882 DOI: 10.1039/d1sc05791j] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/20/2021] [Indexed: 01/17/2023] Open
Abstract
Molecular solar-thermal energy storage (MOST) systems are based on photoswitches that reversibly convert solar energy into chemical energy. In this context, bicyclooctadienes (BODs) undergo a photoinduced transformation to the corresponding higher energy tetracyclooctanes (TCOs), but the photoswitch system has not until now been evaluated for MOST application, due to the short half-life of the TCO form and limited available synthetic methods. The BOD system degrades at higher temperature via a retro-Diels-Alder reaction, which complicates the synthesis of the compounds. We here report a cross-coupling reaction strategy that enables an efficient synthesis of a series of 4 new BOD compounds. We show that the BODs were able to switch to the corresponding tetracyclooctanes (TCOs) in a reversible way and can be cycled 645 times with only 0.01% degradation. Half-lives of the TCOs were measured, and we illustrate how the half-life could be engineered from seconds to minutes by molecular structure design. A density functional theory (DFT) based modelling framework was developed to access absorption spectra, thermal half-lives, and storage energies which were calculated to be 143-153 kJ mol-1 (0.47-0.51 MJ kg-1), up to 76% higher than for the corresponding norbornadiene. The combined computational and experimental findings provide a reliable way of designing future BOD/TCO systems with tailored properties.
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Affiliation(s)
- Maria Quant
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemigården 4 412 96 Gothenburg Sweden
| | | | - Shima Ghasemi
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemigården 4 412 96 Gothenburg Sweden
| | - Mate Erdelyi
- Department of Chemistry - BMC, Uppsala University Husargatan 3 752 37 Uppsala Sweden
| | - Zhihang Wang
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemigården 4 412 96 Gothenburg Sweden
| | - Lidiya M Muhammad
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemigården 4 412 96 Gothenburg Sweden
| | - Nina Kann
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemigården 4 412 96 Gothenburg Sweden
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5 2100 Copenhagen Denmark
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemigården 4 412 96 Gothenburg Sweden
- The Institute of Materials Science of Barcelona, ICMAB-CSIC 08193, Bellaterra Barcelona Spain
- Catalan Institution for Research & Advanced Studies, ICREA Pg. Lluís Companys 23 Barcelona Spain
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16
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Hillers-Bendtsen AE, Quant M, Moth-Poulsen K, Mikkelsen KV. Investigation of the Structural and Thermochemical Properties of [2.2.2]-Bicyclooctadiene Photoswitches. J Phys Chem A 2021; 125:10330-10339. [PMID: 34809434 DOI: 10.1021/acs.jpca.1c07737] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular photoswitches can under certain conditions be used to store solar energy in the so-called molecular solar thermal storage systems, which is an interesting technology for renewable energy solutions. The current investigations focus on the performance of seven different density functional theory (DFT) methods (B3LYP, CAM-B3LYP, PBE0, M06-2X, ωB97X-D, B2PLYP, and PBE0DH) when predicting geometries and thermochemical properties of the [2.2.2]-bicyclooctadiene (BOD) photoswitch. We find that all of the investigated DFT methods provide geometries that are in good agreement with those obtained using coupled cluster singles and doubles (CCSD) calculations. The dependence on the employed basis set is not large when predicting geometries. With respect to the thermochemical properties, we find that the M06-2X, CAM-B3LYP, PBE0, and ωB97X-D functionals all predict thermochemical properties that are in good agreement with the results of the CCSD, the CCSD including perturbative triples (CCSD(T)), and the explicitly correlated CCSD-F12 and CCSD(T)-F12 models. Lastly, for energy calculations, we tested the newly developed fourth-order cluster perturbation theory singles and doubles CPS(D-4) model, which in this study provides energy differences that are of CCSD and sometimes also CCSD(T) quality at a relatively low cost. We find that the CPS(D-4) model is an excellent choice for further investigation of BOD derivatives because accurate energies can be obtained routinely using this methodology. From the results, we also note that the predicted storage energies and storage energy densities for the BOD photoswitch are very large compared to other molecular solar thermal storage systems and that these systems could be candidates for such applications.
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Affiliation(s)
| | - Maria Quant
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden.,The Institute of Materials Science of Barcelona, ICMAB-CSIC, Bellaterra, Barcelona 08193, Spain.,Catalan Institution for Research Advanced Studies, ICREA, Pg. Lluis Companys 23, Barcelona 08010, Spain
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
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17
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Volarić J, Szymanski W, Simeth NA, Feringa BL. Molecular photoswitches in aqueous environments. Chem Soc Rev 2021; 50:12377-12449. [PMID: 34590636 PMCID: PMC8591629 DOI: 10.1039/d0cs00547a] [Citation(s) in RCA: 132] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Indexed: 12/17/2022]
Abstract
Molecular photoswitches enable dynamic control of processes with high spatiotemporal precision, using light as external stimulus, and hence are ideal tools for different research areas spanning from chemical biology to smart materials. Photoswitches are typically organic molecules that feature extended aromatic systems to make them responsive to (visible) light. However, this renders them inherently lipophilic, while water-solubility is of crucial importance to apply photoswitchable organic molecules in biological systems, like in the rapidly emerging field of photopharmacology. Several strategies for solubilizing organic molecules in water are known, but there are not yet clear rules for applying them to photoswitchable molecules. Importantly, rendering photoswitches water-soluble has a serious impact on both their photophysical and biological properties, which must be taken into consideration when designing new systems. Altogether, these aspects pose considerable challenges for successfully applying molecular photoswitches in aqueous systems, and in particular in biologically relevant media. In this review, we focus on fully water-soluble photoswitches, such as those used in biological environments, in both in vitro and in vivo studies. We discuss the design principles and prospects for water-soluble photoswitches to inspire and enable their future applications.
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Affiliation(s)
- Jana Volarić
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| | - Wiktor Szymanski
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
- Department of Radiology, Medical Imaging Center, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Nadja A Simeth
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
- Institute for Organic and Biomolecular Chemistry, University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany
| | - Ben L Feringa
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
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18
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Ree N, Koerstz M, Mikkelsen KV, Jensen JH. Virtual screening of norbornadiene-based molecular solar thermal energy storage systems using a genetic algorithm. J Chem Phys 2021; 155:184105. [PMID: 34773961 DOI: 10.1063/5.0063694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a computational methodology for the screening of a chemical space of 1025 substituted norbornadiene molecules for promising kinetically stable molecular solar thermal (MOST) energy storage systems with high energy densities that absorb in the visible part of the solar spectrum. We use semiempirical tight-binding methods to construct a dataset of nearly 34 000 molecules and train graph convolutional networks to predict energy densities, kinetic stability, and absorption spectra and then use the models together with a genetic algorithm to search the chemical space for promising MOST energy storage systems. We identify 15 kinetically stable molecules, five of which have energy densities greater than 0.45 MJ/kg, and the main conclusion of this study is that the largest energy density that can be obtained for a single norbornadiene moiety with the substituents considered here, while maintaining a long half-life and absorption in the visible spectrum, is around 0.55 MJ/kg.
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Affiliation(s)
- Nicolai Ree
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Mads Koerstz
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Jan H Jensen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
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19
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Ree N, Mikkelsen KV. Benchmark study on the optical and thermochemical properties of the norbornadiene-quadricyclane photoswitch. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Büllmann SM, Jäschke A. Norbornadiene-bridged diarylethenes and their conversion into turn-off fluorescent photoswitches. Chem Commun (Camb) 2020; 56:7124-7127. [PMID: 32458841 DOI: 10.1039/d0cc02210a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the synthesis and characterization of novel diarylethene photoswitches that contain a norbornadiene bridge and operate as p-type positive photochromes. One of the double bonds of norbornadiene is furthermore utilized to attach a fluoresceine tetrazine by an iEDDA cascade reaction, thereby forming a turn-off mode fluorescent photoswitch.
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Affiliation(s)
- Simon M Büllmann
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany.
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21
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Mansø M, Petersen AU, Moth-Poulsen K, Nielsen MB. Establishing linear-free-energy relationships for the quadricyclane-to-norbornadiene reaction. Org Biomol Chem 2020; 18:2113-2119. [PMID: 32119025 DOI: 10.1039/d0ob00147c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of the thermal quadricyclane-to-norbornadiene (QC-to-NBD) isomerization reaction was studied for a large selection of derivatives where the one NBD double bond contains a cyano and aryl substituent of either electron-withdrawing or -donating character. While the kinetics data did not satisfy a linear-free-energy-relationship for all the derivatives based on Hammett σ values, we found individual linear relationships for derivatives containing either electron-withdrawing or electron-donating para substituents on the aryl group; with the most electron-witdrawing substituent in the one series and with the most electron-donating substituent in the other providing the fastest reaction (corresponding to opposite slopes of the Hammett plots). All data were well described, however, by a linear relationship when using Creary radical values; the correlation could be slightly improved by using a combination of σ and values (used in ratio of 0.104 : 1). The results imply a combination of polar and free radical effects for the isomerization reaction of this specific class of derivatives, with the latter playing the most significant role. The NBD derivatives were prepared by Diels-Alder cycloaddition reactions between cyclopentadiene and 3-arylpropiolonitriles, and in the case of bromophenyl derivatives further cyanation and Sonogashira coupling reactions were performed.
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Affiliation(s)
- Mads Mansø
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
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22
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Petersen AU, Hofmann AI, Fillols M, Mansø M, Jevric M, Wang Z, Sumby CJ, Müller C, Moth‐Poulsen K. Solar Energy Storage by Molecular Norbornadiene-Quadricyclane Photoswitches: Polymer Film Devices. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900367. [PMID: 31380172 PMCID: PMC6662068 DOI: 10.1002/advs.201900367] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/03/2019] [Indexed: 06/10/2023]
Abstract
Devices that can capture and convert sunlight into stored chemical energy are attractive candidates for future energy technologies. A general challenge is to combine efficient solar energy capture with high energy densities and energy storage time into a processable composite for device application. Here, norbornadiene (NBD)-quadricyclane (QC) molecular photoswitches are embedded into polymer matrices, with possible applications in energy storing coatings. The NBD-QC photoswitches that are capable of absorbing sunlight with estimated solar energy storage efficiencies of up to 3.8% combined with attractive energy storage densities of up to 0.48 MJ kg-1. The combination of donor and acceptor units leads to an improved solar spectrum match with an onset of absorption of up to 529 nm and a lifetime (t 1/2) of up to 10 months. The NBD-QC systems with properties matched to a daily energy storage cycle are further investigated in the solid state by embedding the molecules into a series of polymer matrices revealing that polystyrene is the preferred choice of matrix. These polymer devices, which can absorb sunlight and over a daily cycle release the energy as heat, are investigated for their cyclability, showing multicycle reusability with limited degradation that might allow them to be applied as window laminates.
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Affiliation(s)
- Anne Ugleholdt Petersen
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
| | - Anna I. Hofmann
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
| | - Méritxell Fillols
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
| | - Mads Mansø
- Department of ChemistryUniversity of CopenhagenUniversitetsparken 52100Copenhagen ØDenmark
| | - Martyn Jevric
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
| | - Zhihang Wang
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
| | | | - Christian Müller
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
| | - Kasper Moth‐Poulsen
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE‐412 96GothenburgSweden
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23
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Affiliation(s)
- Cai‐Li Sun
- Department of ChemistryUniversity of Liverpool Liverpool L69 7ZD United Kingdom
| | - Chenxu Wang
- Department of ChemistryUniversity of Liverpool Liverpool L69 7ZD United Kingdom
| | - Roman Boulatov
- Department of ChemistryUniversity of Liverpool Liverpool L69 7ZD United Kingdom
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24
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Mansø M, Kilde MD, Singh SK, Erhart P, Moth-Poulsen K, Nielsen MB. Dithiafulvene derivatized donor-acceptor norbornadienes with redshifted absorption. Phys Chem Chem Phys 2019; 21:3092-3097. [PMID: 30672939 DOI: 10.1039/c8cp07744d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoisomerization of norbornadiene (N) to its metastable isomer quadricyclane (Q) has attracted interest as a strategy for harvesting and storing solar energy. For this strategy to mature the absorption maximum of N has to be moved from the UV to the visible region. Here we show that functionalization of the system with dithiafulvene (DTF) electron donors causes remarkable redshifts of various N derivatives. Thus, some derivatives were found to absorb light with an absorption onset up to 556 nm. The incorporation of DTF units comes, however, with a drawback with regard to achieving reversible N-to-Q and Q-to-N isomerizations. For some derivatives, the photoisomerization was completely quenched. The compounds were subjected to a computational study to shed light on the underlying reason for this reluctance to undergo photoisomerization. The computational study revealed that in these systems, the first excited state (S1) is positioned close to or lower than the transition state for photoconversion, effectively blocking a possible conversion to Q, thus revealing a practical challenge for the future design of N-Q energy storage systems with an improved solar spectrum match.
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Affiliation(s)
- Mads Mansø
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
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