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Henkel C, Wittmann JE, Träg J, Will J, Stiegler LMS, Strohriegl P, Hirsch A, Unruh T, Zahn D, Halik M, Guldi DM. Mixed Organic Ligand Shells: Controlling the Nanoparticle Surface Morphology toward Tuning the Optoelectronic Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1903729. [PMID: 31778297 DOI: 10.1002/smll.201903729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 10/05/2019] [Indexed: 06/10/2023]
Abstract
Precise control over the ratio of perylene bisimide (PBI) monomers and aggregates, immobilized on alumina nanoparticle (NP) surfaces, is demonstrated. Towards this goal, phosphonic acid functionalized PBI derivatives (PA-PBI) are shown to self-assemble into stoichiometrically mixed monolayers featuring aliphatic, glycolic, or fluorinated phosphonic acid ligands, serving as imbedding matrix (PA-M) to afford core-shell NPs. Different but, nevertheless, defined PBI monomer/aggregate composition is achieved by either the variation in the PA-PBI to PA-M ratios, or the utilization of different PA-Ms. Various steady-state as well as time-resolved spectroscopy techniques are applied to probe the core-shell NPs with respect to changes in their optical properties upon variations in the shell composition. To this end, the ratio between monomer and excimer-like emission assists in deriving information on the self-assembled monolayer composition, local ordering, and corresponding aggregate content. With the help of X-ray reflectivity measurements, accompanied by molecular dynamics simulations, the built-up of the particle shells, in general, and the PBI aggregation behavior, in particular, are explored in depth.
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Affiliation(s)
- Christian Henkel
- Department Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany
| | - Judith E Wittmann
- Organic Materials and Devices, Friedrich-Alexander-University Erlangen-Nürnberg, Cauerstraße 3, 91058, Erlangen, Germany
| | - Johannes Träg
- Computer Chemistry Center, Friedrich-Alexander-University Erlangen-Nürnberg, Nägelsbachstraße 25, 91052, Erlangen, Germany
| | - Johannes Will
- Institute for Crystallography and Structural Physics, Friedrich-Alexander-University Erlangen-Nürnberg, Staudtstraße 3, 91058, Erlangen, Germany
- Center for Nanoanalysis and Electron Microscopy, Friedrich-Alexander-University Erlangen-Nürnberg, Cauerstraße 6, 91058, Erlangen, Germany
| | - Lisa M S Stiegler
- Chair of Organic Chemistry II, Friedrich-Alexander-University Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058, Erlangen, Germany
| | - Peter Strohriegl
- Macromolecular Chemistry I, University of Bayreuth, Universitätsstraße 30, 95440, Bayreuth, Germany
| | - Andreas Hirsch
- Chair of Organic Chemistry II, Friedrich-Alexander-University Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058, Erlangen, Germany
| | - Tobias Unruh
- Institute for Crystallography and Structural Physics, Friedrich-Alexander-University Erlangen-Nürnberg, Staudtstraße 3, 91058, Erlangen, Germany
- Center for Nanoanalysis and Electron Microscopy, Friedrich-Alexander-University Erlangen-Nürnberg, Cauerstraße 6, 91058, Erlangen, Germany
| | - Dirk Zahn
- Computer Chemistry Center, Friedrich-Alexander-University Erlangen-Nürnberg, Nägelsbachstraße 25, 91052, Erlangen, Germany
| | - Marcus Halik
- Organic Materials and Devices, Friedrich-Alexander-University Erlangen-Nürnberg, Cauerstraße 3, 91058, Erlangen, Germany
| | - Dirk M Guldi
- Department Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany
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Saegusa T, Sakai H, Nagashima H, Kobori Y, Tkachenko NV, Hasobe T. Controlled Orientations of Neighboring Tetracene Units by Mixed Self-Assembled Monolayers on Gold Nanoclusters for High-Yield and Long-Lived Triplet Excited States through Singlet Fission. J Am Chem Soc 2019; 141:14720-14727. [DOI: 10.1021/jacs.9b06567] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Toshiyuki Saegusa
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Hayato Sakai
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Hiroki Nagashima
- Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Yasuhiro Kobori
- Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Nikolai V. Tkachenko
- Chemistry and Advanced Materials Group, Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, FI33720 Tampere, Finland
| | - Taku Hasobe
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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Hirono A, Sakai H, Hasobe T. Synthesis and Electrochemical and Photophysical Properties of Azaterrylene Derivatives. Chem Asian J 2019; 14:1754-1762. [PMID: 30378763 DOI: 10.1002/asia.201801410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/26/2018] [Indexed: 11/08/2022]
Abstract
A series of terrylene derivatives, such as monoazaterrylene (MATerry), 1,6-diazaterrylene (DiATerry) and pristine terrylene (Terry), were synthesized by changing the number of nitrogen atoms at the bay region (1 and 6 positions of the Terry core). The electrochemical measurements suggested that the first one-electron reduction and oxidation potentials became positively shifted with increasing numbers of nitrogen atoms. This agreed with the energies of the corresponding highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) states estimated by DFT methods. In contrast, the HOMO-LUMO gaps approximately remained constant. This trend is quite similar to the spectroscopic behaviors observed by absorption and fluorescence spectra. The solvent polarity-dependent spectroscopic trends of DiATerry suggested the intramolecular charge-transfer (ICT) characters. The evaluation of the excited-state dynamics in various solvents indicated the electronic configurational changes of the excited states relative to the ground state via the ICT. This was supported by the Lippert-Mataga plots. Finally, the reversible protonation and deprotonation processes were also observed.
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Affiliation(s)
- Akitsu Hirono
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - Hayato Sakai
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - Taku Hasobe
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
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Sakai H, Inaya R, Nagashima H, Nakamura S, Kobori Y, Tkachenko NV, Hasobe T. Multiexciton Dynamics Depending on Intramolecular Orientations in Pentacene Dimers: Recombination and Dissociation of Correlated Triplet Pairs. J Phys Chem Lett 2018; 9:3354-3360. [PMID: 29847939 DOI: 10.1021/acs.jpclett.8b01184] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pentacene dimers bridged by a phenylene at ortho and meta positions [denoted as o-(Pc)2 and m-(Pc)2] were synthesized to examine intramolecular orientation-dependent multiexciton dynamics, especially focusing on singlet fission (SF) and recombination from correlated triplet pairs [(TT)]. Absorption and electrochemical measurements indicated strong intramolecular couplings of o-(Pc)2 relative to m-(Pc)2. Femtosecond and nanosecond TA measurements successfully demonstrated efficient SF in both dimers. In contrast, the dissociation process from the (TT) to the individual triplets [(2 × T)] was clearly observed in m-(Pc)2, which is in sharp contrast to a major recombination process in o-(Pc)2. Time-resolved electron spin resonance (TR-ESR) measurements demonstrated that the recombination and dissociation proceed from the quintet state of 5(TT) in m-(Pc)2. The rate constant of the SF was 2 orders of magnitude greater in o-(Pc)2 than that in m-(Pc)2 and was rationalized by enhanced electronic coupling between adjacent HOMOs of the Pc units.
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Affiliation(s)
- Hayato Sakai
- Department of Chemistry , Faculty of Science and Technology, Keio University , Yokohama 223-8522 , Japan
| | - Ryutaro Inaya
- Department of Chemistry , Faculty of Science and Technology, Keio University , Yokohama 223-8522 , Japan
| | - Hiroki Nagashima
- Molecular Photoscience Research Center , Kobe University , 1-1 Rokkodai-cho , Nada-ku, Kobe 657-8501 , Japan
| | - Shunta Nakamura
- Department of Chemistry , Faculty of Science and Technology, Keio University , Yokohama 223-8522 , Japan
| | - Yasuhiro Kobori
- Molecular Photoscience Research Center , Kobe University , 1-1 Rokkodai-cho , Nada-ku, Kobe 657-8501 , Japan
- Department of Chemistry , Graduate School of Science, Kobe University , Kobe 657-8501 , Japan
| | - Nikolai V Tkachenko
- Laboratory of Chemistry and Bioengineering , Tampere University of Technology , 33720 Tampere , Finland
| | - Taku Hasobe
- Department of Chemistry , Faculty of Science and Technology, Keio University , Yokohama 223-8522 , Japan
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