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Sun N, Singh S, Zhang H, Hermes I, Zhou Z, Schlicke H, Vaynzof Y, Lissel F, Fery A. Gold Nanoparticles with N-Heterocyclic Carbene/Triphenylamine Surface Ligands: Stable and Electrochromically Active Hybrid Materials for Optoelectronics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400752. [PMID: 38774949 PMCID: PMC11304275 DOI: 10.1002/advs.202400752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Indexed: 08/09/2024]
Abstract
Organic-hybrid particle-based materials are increasingly important in (opto)electronics, sensing, and catalysis due to their printability and stretchability as well as their potential for unique synergistic functional effects. However, these functional properties are often limited due to poor electronic coupling between the organic shell and the nanoparticle. N-heterocyclic carbenes (NHCs) belong to the most promising anchors to achieve electronic delocalization across the interface, as they form robust and highly conductive bonds with metals and offer a plethora of functionalization possibilities. Despite the outstanding potential of the conductive NHC-metal bond, synthetic challenges have so far limited its application to the improvement of colloidal stabilities, disregarding the potential of the conductive anchor. Here, NHC anchors are used to modify redox-active gold nanoparticles (AuNPs) with conjugated triphenylamines (TPA). The resulting AuNPs exhibit excellent thermal and redox stability benefiting from the robust NHC-gold bond. As electrochromic materials, the hybrid materials show pronounced color changes from red to dark green, a highly stable cycling stability (1000 cycles), and a fast response speed (5.6 s/2.1 s). Furthermore, TPA-NHC@AuNP exhibits an ionization potential of 5.3 eV and a distinct out-of-plane conductivity, making them a promising candidate for application as hole transport layers in optoelectronic devices.
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Affiliation(s)
- Ningwei Sun
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
| | - Shivam Singh
- Chair for Emerging Electronic TechnologiesTechnical University of DresdenNöthnitzer Str. 6101187DresdenGermany
- Leibniz Institute for Solid State and Materials Research DresdenHelmholtzstraße 2001069DresdenGermany
| | - Haoran Zhang
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
| | - Ilka Hermes
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
| | - Ziwei Zhou
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
| | - Hendrik Schlicke
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
| | - Yana Vaynzof
- Chair for Emerging Electronic TechnologiesTechnical University of DresdenNöthnitzer Str. 6101187DresdenGermany
- Leibniz Institute for Solid State and Materials Research DresdenHelmholtzstraße 2001069DresdenGermany
| | - Franziska Lissel
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
- Hamburg University of TechnologyKasernenstraße 1221073HamburgGermany
| | - Andreas Fery
- Leibniz‐Institut für Polymerforschung Dresden e.V.Hohe Straße 601069DresdenGermany
- Chair for Physical Chemistry of Polymeric MaterialsTechnische Universität DresdenBergstraße 6601069DresdenGermany
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2
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Dominique NL, Jensen IM, Kaur G, Kotseos CQ, Boggess WC, Jenkins DM, Camden JP. Giving Gold Wings: Ultrabright and Fragmentation Free Mass Spectrometry Reporters for Barcoding, Bioconjugation Monitoring, and Data Storage. Angew Chem Int Ed Engl 2023; 62:e202219182. [PMID: 36853583 DOI: 10.1002/anie.202219182] [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: 12/27/2022] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/01/2023]
Abstract
The widespread application of laser desorption/ionization mass spectrometry (LDI-MS) highlights the need for a bright and multiplexable labeling platform. While ligand-capped Au nanoparticles (AuNPs) have emerged as a promising LDI-MS contrast agent, the predominant thiol ligands suffer from low ion yields and extensive fragmentation. In this work, we develop a N-heterocyclic carbene (NHC) ligand platform that enhances AuNP LDI-MS performance. NHC scaffolds are tuned to generate barcoded AuNPs which, when benchmarked against thiol-AuNPs, are bright mass tags and form unfragmented ions in high yield. To illustrate the transformative potential of NHC ligands, the mass tags were employed in three orthogonal applications: monitoring a bioconjugation reaction, performing multiplexed imaging, and storing and reading encoded information. These results demonstrate that NHC-nanoparticle systems are an ideal platform for LDI-MS and greatly broaden the scope of nanoparticle contrast agents.
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Affiliation(s)
- Nathaniel L Dominique
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Isabel M Jensen
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, 37996, USA
| | - Gurkiran Kaur
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, 37996, USA
| | - Chandler Q Kotseos
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - William C Boggess
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - David M Jenkins
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, 37996, USA
| | - Jon P Camden
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
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3
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Thomas SR, Yang W, Morgan DJ, Davies TE, Li JJ, Fischer RA, Huang J, Dimitratos N, Casini A. Bottom-up Synthesis of Water-Soluble Gold Nanoparticles Stabilized by N-Heterocyclic Carbenes: From Structural Characterization to Applications. Chemistry 2022; 28:e202201575. [PMID: 35801389 PMCID: PMC9804724 DOI: 10.1002/chem.202201575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Indexed: 01/09/2023]
Abstract
N-heterocyclic carbenes (NHCs) have become attractive ligands for functionalizing gold nanoparticle surfaces with applications ranging from catalysis to biomedicine. Despite their great potential, NHC stabilized gold colloids (NHC@AuNPs) are still scarcely explored and further efforts should be conducted to improve their design and functionalization. Here, the 'bottom-up' synthesis of two water-soluble gold nanoparticles (AuNP-1 and AuNP-2) stabilized by hydrophilic mono- and bidentate NHC ligands is reported together with their characterization by various spectroscopic and analytical methods. The NPs showed key differences likely to be due to the selected NHC ligand systems. Transmission electron microscopy (TEM) images showed small quasi-spherical and faceted NHC@AuNPs of similar particle size (ca. 2.3-2.6 nm) and narrow particle size distribution, but the colloids featured different ratios of Au(I)/Au(0) by X-ray photoelectron spectroscopy (XPS). Furthermore, the NHC@AuNPs were supported on titania and fully characterized. The new NPs were studied for their catalytic activity towards the reduction of nitrophenol substrates, the reduction of resazurin and for their photothermal efficiency. Initial results on their application in photothermal therapy (PTT) were obtained in human cancer cells in vitro. The aforementioned reactions represent important model reactions towards wastewater remediation, bioorthogonal transformations and cancer treatment.
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Affiliation(s)
- Sophie R. Thomas
- Chair of Medicinal and Bioinorganic ChemistryDepartment of ChemistryTechnical University of MunichLichtenbergstrasse 485747GarchingGermany
| | - Wenjie Yang
- School of Chemical and Biomolecular EngineeringUniversity of SydneyNSW2006Australia
| | - David J. Morgan
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATU.K.
| | - Thomas E. Davies
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATU.K.
| | - Jiao Jiao Li
- Kolling InstituteFaculty of Medicine and HealthUniversity of SydneySt LeonardsNSW2065Australia
| | - Roland A. Fischer
- Chair of Inorganic and Metal–Organic ChemistryDepartment of ChemistryTechnical University of MunichLichtenbergstrasse 485747GarchingGermany
| | - Jun Huang
- School of Chemical and Biomolecular EngineeringUniversity of SydneyNSW2006Australia
| | - Nikolaos Dimitratos
- Department of Industrial Chemistry “Toso Montanari” Universita' degli Studi di BolognaViale Risorgimento40136BolognaItaly,Center for Chemical Catalysis - C3, Alma Mater Studiorum Università di BolognaViale Risorgimento 440136BolognaItaly
| | - Angela Casini
- Chair of Medicinal and Bioinorganic ChemistryDepartment of ChemistryTechnical University of MunichLichtenbergstrasse 485747GarchingGermany,Munich Data Science Institute (MDSI)Technical University of MunichWalther-von-Dyck Strasse 1085748GarchingGermany
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4
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Heller ER, Richardson JO. Heavy-Atom Quantum Tunnelling in Spin Crossovers of Nitrenes. Angew Chem Int Ed Engl 2022; 61:e202206314. [PMID: 35698730 PMCID: PMC9540336 DOI: 10.1002/anie.202206314] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Indexed: 01/01/2023]
Abstract
We simulate two recent matrix-isolation experiments at cryogenic temperatures, in which a nitrene undergoes spin crossover from its triplet state to a singlet state via quantum tunnelling. We detail the failure of the commonly applied weak-coupling method (based on a linear approximation of the potentials) in describing these deep-tunnelling reactions. The more rigorous approach of semiclassical golden-rule instanton theory in conjunction with double-hybrid density-functional theory and multireference perturbation theory does, however, provide rate constants and kinetic isotope effects in good agreement with experiment. In addition, these calculations locate the optimal tunnelling pathways, which provide a molecular picture of the reaction mechanism. The reactions involve substantial heavy-atom quantum tunnelling of carbon, nitrogen and oxygen atoms, which unexpectedly even continues to play a role at room temperature.
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Affiliation(s)
- Eric R. Heller
- Laboratory of Physical ChemistryETH Zürich8093ZürichSwitzerland
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5
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Heller ER, Richardson JO. Heavy‐Atom Quantum Tunnelling in Spin Crossovers of Nitrenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Eric R Heller
- Eidgenossische Technische Hochschule Zurich Lab. Physical Chemistry SWITZERLAND
| | - Jeremy O Richardson
- Eidgenössische Technische Hochschule Zürich Lab. Physical Chemistry Vladimir-Prelog-Weg 2 8093 Zurich SWITZERLAND
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6
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Eisen C, Chin JM, Reithofer MR. Catalytically Active Gold Nanomaterials Stabilized by N-heterocyclic Carbenes. Chem Asian J 2021; 16:3026-3037. [PMID: 34399027 PMCID: PMC8597167 DOI: 10.1002/asia.202100731] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/12/2021] [Indexed: 12/04/2022]
Abstract
Solid supported or ligand capped gold nanomaterials (AuNMs) emerged as versatile and recyclable heterogeneous catalysts for a broad variety of conversions in the ongoing catalytic 'gold rush'. Existing at the border of homogeneous and heterogeneous catalysis, AuNMs offer the potential to merge high catalytic activity with significant substrate selectivity. Owing to their strong binding towards the surface atoms of AuMNs, NHCs offer tunable activation of surface atoms while maintaining selectivity and stability of the NM even under challenging conditions. This work summarizes well-defined catalytically active NHC capped AuNMs including spherical nanoparticles and atom-precise nanoclusters as well as the important NHC design choices towards activity and (stereo-)selectivity enhancements.
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Affiliation(s)
- Constantin Eisen
- Department of Inorganic ChemistryFaculty of ChemistryUniversity of ViennaWähringer Straße 421090ViennaAustria
| | - Jia Min Chin
- Department of Physical ChemistryFaculty of ChemistryUniversity of ViennaWähringer Straße 421090ViennaAustria
| | - Michael R. Reithofer
- Department of Inorganic ChemistryFaculty of ChemistryUniversity of ViennaWähringer Straße 421090ViennaAustria
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7
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Veinot AJ, Al-Rashed A, Padmos JD, Singh I, Lee DS, Narouz MR, Lummis PA, Baddeley CJ, Crudden CM, Horton JH. N-Heterocyclic Carbenes Reduce and Functionalize Copper Oxide Surfaces in One Pot. Chemistry 2020; 26:11431-11434. [PMID: 32428330 DOI: 10.1002/chem.202002308] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Indexed: 01/15/2023]
Abstract
Benzimidazolium hydrogen carbonate salts have been shown to act as N-heterocyclic carbene precursors, which can remove oxide from copper oxide surfaces and functionalize the resulting metallic surfaces in a single pot. Both the surfaces and the etching products were fully characterized by spectroscopic methods. Analysis of surfaces before and after NHC treatment by X-ray photoelectron spectroscopy demonstrates the complete removal of copper(II) oxide. By using 13 C-labelling, we determined that the products of this transformation include a cyclic urea, a ring-opened formamide and a bis-carbene copper(I) complex. These results illustrate the potential of NHCs to functionalize a much broader class of metals, including those prone to oxidation, greatly facilitating the preparation of NHC-based films on metals other than gold.
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Affiliation(s)
- Alex J Veinot
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - Abrar Al-Rashed
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - J Daniel Padmos
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - Ishwar Singh
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - Dianne S Lee
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - Mina R Narouz
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - Paul A Lummis
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| | - Christopher J Baddeley
- EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, United Kingdom
| | - Cathleen M Crudden
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - J Hugh Horton
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
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8
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Nguyen DT, Freitag M, Gutheil C, Sotthewes K, Tyler BJ, Böckmann M, Das M, Schlüter F, Doltsinis NL, Arlinghaus HF, Ravoo BJ, Glorius F. Ein auf Arylazopyrazol basierendes N‐heterocyclisches Carben als Photoschalter auf Goldoberflächen: Lichtschaltbare Benetzbarkeit, Austrittsarbeit und Leitwert. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003523] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- D. Thao Nguyen
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
- Center for Soft Nanoscience (SoN) Westfälische Wilhelms-Universität Münster Busso-Peus-Straße 10 48149 Münster Deutschland
| | - Matthias Freitag
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Christian Gutheil
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Kai Sotthewes
- Physics of Interfaces and Nanomaterials MESA+ Institute for Nanotechnology University of Twente P.O. Box 217 7500 AE Enschede Niederlande
| | - Bonnie J. Tyler
- Physikalisches Institut Westfälische Wilhelms-Universität Münster Wilhelm-Klemm-Straße 10 48149 Münster Deutschland
| | - Marcus Böckmann
- Institute for Solid State Theory and Center for Multiscale Theory & Computation Westfälische Wilhelms-Universität Münster Wilhelm-Klemm-Straße 10 48149 Münster Deutschland
| | - Mowpriya Das
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Friederike Schlüter
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
- Center for Soft Nanoscience (SoN) Westfälische Wilhelms-Universität Münster Busso-Peus-Straße 10 48149 Münster Deutschland
| | - Nikos L. Doltsinis
- Institute for Solid State Theory and Center for Multiscale Theory & Computation Westfälische Wilhelms-Universität Münster Wilhelm-Klemm-Straße 10 48149 Münster Deutschland
| | - Heinrich F. Arlinghaus
- Physikalisches Institut Westfälische Wilhelms-Universität Münster Wilhelm-Klemm-Straße 10 48149 Münster Deutschland
| | - Bart Jan Ravoo
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
- Center for Soft Nanoscience (SoN) Westfälische Wilhelms-Universität Münster Busso-Peus-Straße 10 48149 Münster Deutschland
| | - Frank Glorius
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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9
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Nguyen DT, Freitag M, Gutheil C, Sotthewes K, Tyler BJ, Böckmann M, Das M, Schlüter F, Doltsinis NL, Arlinghaus HF, Ravoo BJ, Glorius F. An Arylazopyrazole-Based N-Heterocyclic Carbene as a Photoswitch on Gold Surfaces: Light-Switchable Wettability, Work Function, and Conductance. Angew Chem Int Ed Engl 2020; 59:13651-13656. [PMID: 32271973 DOI: 10.1002/anie.202003523] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/08/2020] [Indexed: 12/13/2022]
Abstract
A novel photoresponsive and fully conjugated N-heterocyclic carbene (NHC) has been synthesized that combines the excellent photophysical properties of arylazopyrazoles (AAPs) with an NHC that acts as a robust surface anchor (AAP-BIMe). The formation of self-assembled monolayers (SAMs) on gold was proven by ToF-SIMS and XPS, and the organic film displayed a very high stability at elevated temperatures. This stability was also reflected in a high desorption energy, which was determined by temperature-programmed SIMS measurements. E-/Z-AAP-BIMe@Au photoisomerization resulted in reversible alterations of the surface energy (i.e. wettability), the surface potential (i.e. work function), and the conductance (i.e. resistance). The effects could be explained by the difference in the dipole moment of the isomers. Furthermore, sequential application of a dummy ligand by microcontact printing and subsequent backfilling with AAP-BIMe allowed its patterning on gold. To the best of our knowledge, this is the first example of a photoswitchable NHC on a gold surface. These properties of AAP-BIMe@Au illustrate its suitability as a molecular switch for electronic devices.
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Affiliation(s)
- D Thao Nguyen
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany.,Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Strasse 10, 48149, Münster, Germany
| | - Matthias Freitag
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Christian Gutheil
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Kai Sotthewes
- Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands
| | - Bonnie J Tyler
- Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149, Münster, Germany
| | - Marcus Böckmann
- Institute for Solid State Theory and Center for Multiscale Theory & Computation, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149, Münster, Germany
| | - Mowpriya Das
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Friederike Schlüter
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany.,Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Strasse 10, 48149, Münster, Germany
| | - Nikos L Doltsinis
- Institute for Solid State Theory and Center for Multiscale Theory & Computation, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149, Münster, Germany
| | - Heinrich F Arlinghaus
- Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149, Münster, Germany
| | - Bart Jan Ravoo
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany.,Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Strasse 10, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
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