1
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Padula D. Discriminating Clockwise and Counterclockwise Photoisomerization Paths in Achiral Photoswitches by Excited-State Electronic Circular Dichroism. J Phys Chem B 2024. [PMID: 39171863 DOI: 10.1021/acs.jpcb.4c02384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Despite the numerous investigations of photoisomerization reactions from both the computational and experimental points of view, even in complex environments, to date there is no direct demonstration of the direction of rotation of the retinal chromophore, initiating the vision process in several organisms, occurring upon light irradiation. In the literature, many proposals have been formulated to shed light on the details of this process, most of which are extracted from semiclassical simulations. Although high hopes are held in the development of time-resolved X-ray spectroscopy, I argue in this work that simpler but less known techniques can be used to unravel the details of this fascinating photochemical process. In fact, chiroptical spectroscopy would unambiguously prove the direction of the rotatory motion of the chromophore during the photoisomerization process by probing excited state chirality, a piece of information that, so far, has been exclusively extracted from atomistic simulations. I demonstrate this statement by computing the expected chiroptical response along photoisomerization pathways for several models of the retinal chromophores that are found in nature bound to rhodopsins, including nuclear ensemble spectra from semiclassical dynamics simulations, that can be compared with time-resolved experiments.
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Affiliation(s)
- Daniele Padula
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, Siena 53100, Italy
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2
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Kumaranchira Ramankutty K. Circular dichroism and circularly polarized luminescence of ligand-protected molecular metal clusters: insights into structure-chiroptical property relationships. NANOSCALE 2024; 16:11914-11927. [PMID: 38845602 DOI: 10.1039/d4nr01232a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
Molecular noble metal clusters are an emerging class of circularly polarized luminescent (CPL) nanomaterials. Many of the ligand-protected metal clusters exhibit discrete electronic absorption bands, which are assigned to their structural components such as metal core, ligands and metal-ligand interfaces. This implies the suitability of the chiroptical spectroscopic approach to unravel the structure-chiroptical property relationships in molecular metal clusters. Due to the tremendous developments in computational methods for investigating chiroptical properties, along with circular dichroism (CD) and CPL spectroscopy, understanding of the structure-chiroptical properties of these clusters is rapidly progressing. This review discusses various strategies such as the use of chiral ligands, metal atom substitution, ligand exchange, co-crystallization with chiral ligands, etc., for inducing and enhancing the CPL of such metal clusters. This review demonstrates the potential of combined CD-CPL spectroscopic investigations and theoretical calculations to unravel the origins of photoluminescence and CPL activity of chiral metal clusters.
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Affiliation(s)
- Krishnadas Kumaranchira Ramankutty
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P. O., Vithura, Thiruvananthapuram, 69551, India.
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3
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Rouxel JR, Nam Y, Chernyak VY, Mukamel S. Manipulating ultrafast even-order nonlinear chiral responses of L-tryptophan by polarization pulse shaping. Proc Natl Acad Sci U S A 2024; 121:e2402660121. [PMID: 38820001 PMCID: PMC11161790 DOI: 10.1073/pnas.2402660121] [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: 02/06/2024] [Accepted: 04/23/2024] [Indexed: 06/02/2024] Open
Abstract
Molecular chirality has long been monitored in the frequency domain in the ultraviolet, visible, and infrared regimes. Recently developed time-domain approaches can detect time-dependent chiral dynamics by enhancing intrinsically weak chiral signals. Even-order nonlinear signals in chiral molecules have gained attention thanks to their existence in the electric dipole approximation, without relying on the weaker higher-order multipole interactions. We illustrate the optimization of temporal polarization pulse-shaping in various frequency ranges (infrared/optical and optical/X ray) to enhance chiral nonlinear signals. These signals can be recast as an overlap integral of matter and field pseudoscalars which contain the relevant chiral information. Simulations are carried out for second- and fourth-order nonlinear spectroscopies in L-tryptophan.
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Affiliation(s)
- Jérémy R. Rouxel
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL60439
| | - Yeonsig Nam
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL60439
| | | | - Shaul Mukamel
- Department of Chemistry, University of California, Irvine, CA92697-2025
- Department of Physics and Astronomy, University of California, Irvine, CA92697-2025
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4
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Ikai T, Mishima N, Matsumoto T, Miyoshi S, Oki K, Yashima E. 2,2'-Tethered Binaphthyl-Embedded One-Handed Helical Ladder Polymers: Impact of the Tether Length on Helical Geometry and Chiroptical Property. Angew Chem Int Ed Engl 2024; 63:e202318712. [PMID: 38253965 DOI: 10.1002/anie.202318712] [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: 12/05/2023] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 01/24/2024]
Abstract
Synthetic breakthroughs diversify the molecules and polymers available to chemists. We now report the first successful synthesis of a series of optically-pure 2,2'-tethered binaphthyl-embedded helical ladder polymers based on quantitative and chemoselective ladderization by the modified alkyne benzannulations using the 4-alkoxy-2,6-dimethylphenylethynyl group as the alkyne source, inaccessible by the conventional approach lacking the 2,6-dimethyl substituents. Due to the defect-free helix formation, the circular dichroism signal increased by more than 6 times the previously reported value. The resulting helical secondary structure can be fine-tuned by controlling the binaphthyl dihedral angle in the repeating unit with variations in the 2,2'-alkylenedioxy tethering groups by one carbon atom at a time. The optimization of the helical ladder structures led to a strong circularly polarized luminescence with a high fluorescence quantum yield (28 %) and luminescence dissymmetry factor (2.6×10-3 ).
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Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) Kawaguchi, Saitama, 332-0012, Japan
| | - Namiki Mishima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takehiro Matsumoto
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Sayaka Miyoshi
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Kosuke Oki
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
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5
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Ress L, Malý P, Landgraf JB, Lindorfer D, Hofer M, Selby J, Lambert C, Renger T, Brixner T. Time-resolved circular dichroism of excitonic systems: theory and experiment on an exemplary squaraine polymer. Chem Sci 2023; 14:9328-9349. [PMID: 37712031 PMCID: PMC10498725 DOI: 10.1039/d3sc01674a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/28/2023] [Indexed: 09/16/2023] Open
Abstract
Experimental and theoretical foundations for femtosecond time-resolved circular dichroism (TRCD) spectroscopy of excitonic systems are presented. In this method, the system is pumped with linearly polarized light and the signal is defined as the difference between the transient absorption spectrum probed with left and with right circularly polarized light. We present a new experimental setup with a polarization grating as key element to generate circularly polarized pulses. Herein the positive (negative) first order of the diffracted light is left-(right-)circularly polarized and serves as a probe pulse in a TRCD experiment. The grating is capable of transferring ultrashort broadband pulses ranging from 470 nm to 720 nm into two separate beams with opposite ellipticity. By applying a specific chopping scheme we can switch between left and right circular polarizations and detect transient absorption (TA) and TRCD spectra on a shot-to-shot basis simultaneously. We perform experiments on a squaraine polymer, investigating excitonic dynamics, and we develop a general theory for TRCD experiments of excitonically coupled systems that we then apply to describe the experimental data in this particular example. At a magic angle of 54.7° between the pump-pulse polarization and the propagation direction of the probe pulse, the TRCD and TA signals become particularly simple to analyze, since the orientational average over random orientations of complexes factorizes into that of the interaction with the pump and the probe pulse, and the intrinsic electric quadrupole contributions to the TRCD signal average to zero for isotropic samples. Application of exciton theory to linear absorption and to linear circular dichroism spectra of squaraine polymers reveals the presence of two fractions of polymer conformations, a dominant helical conformation with close interpigment distances that are suggested to lead to short-range contributions to site energy shifts and excitonic couplings of the squaraine molecules, and a fraction of unfolded random coils. Theory demonstrates that TRCD spectra of selectively excited helices can resolve state populations that are practically invisible in TA spectroscopy due to the small dipole strength of these states. A qualitative interpretation of TRCD and TA spectra in the spectral window investigated experimentally is offered. The 1 ps time component found in these spectra is related to the slow part of exciton relaxation obtained between states of the helix in the low-energy half of the exciton manifold. The dominant 140 ps time constant reflects the decay of excited states to the electronic ground state.
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Affiliation(s)
- Lea Ress
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Pavel Malý
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg Am Hubland 97074 Würzburg Germany
- Faculty of Mathematics and Physics, Charles University Ke Karlovu 5 121 16 Praha 2 Czech Republic
| | - Jann B Landgraf
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg Am Hubland 97074 Würzburg Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), Universität Freiburg Georges-Köhler-Allee 105 79110 Freiburg Germany
| | - Dominik Lindorfer
- Institut für Theoretische Physik, Johannes Kepler Universität Linz Altenberger Str. 69 4040 Linz Austria
| | - Michael Hofer
- Institut für Theoretische Physik, Johannes Kepler Universität Linz Altenberger Str. 69 4040 Linz Austria
| | - Joshua Selby
- Institut für Organische Chemie, Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Christoph Lambert
- Institut für Organische Chemie, Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Thomas Renger
- Institut für Theoretische Physik, Johannes Kepler Universität Linz Altenberger Str. 69 4040 Linz Austria
| | - Tobias Brixner
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg Am Hubland 97074 Würzburg Germany
- Center for Nanosystems Chemistry (CNC), Universität Würzburg Theodor-Boveri-Weg 97074 Würzburg Germany
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6
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Changenet P, Hache F. Artifact-free balanced detection for the measurement of circular dichroism with a sub-picosecond time resolution. OPTICS EXPRESS 2023; 31:21296-21310. [PMID: 37381232 DOI: 10.1364/oe.489468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 05/14/2023] [Indexed: 06/30/2023]
Abstract
Here we present the development of a subpicosecond spectropolarimeter enabling high sensitivity balanced detection of time-resolved circular dichroism (TRCD) signals from chiral sample in solution. The signals are measured with a conventional femtosecond pump-probe set-up using the combination of a quarter-waveplate and a Wollaston prism. This simple and robust method allows access to TRCD signals with improved signal-to-noise ratio and very short acquisition times. We provide a theoretical analysis of the artifacts of such detection geometry and the strategy to eliminate them. We illustrate the potential of this new detection with the study of the [Ru(phen)3]·2PF6 complexes in acetonitrile.
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7
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Monti M, Stener M, Coccia E. Electronic circular dichroism from real-time propagation in state space. J Chem Phys 2023; 158:084102. [PMID: 36859092 DOI: 10.1063/5.0136392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In this paper, we propose to compute the electronic circular dichroism (ECD) spectra of chiral molecules using a real-time propagation of the time-dependent Schrödinger equation (TDSE) in the space of electronic field-free eigenstates, by coupling TDSE with a given treatment of the electronic structure of the target. The time-dependent induced magnetic moment is used to compute the ECD spectrum from an explicit electric perturbation. The full matrix representing the transition magnetic moment in the space of electronic states is generated from that among pairs of molecular orbitals. In the present work, we show the ECD spectra of methyloxirane, of several conformers of L-alanine, and of the Λ-Co(acac)3 complex, computed from a singly excited ansatz of time-dependent density functional theory eigenstates. The time-domain ECD spectra properly reproduce the frequency-domain ones obtained in the linear-response regime and quantitatively agree with the available experimental data. Moreover, the time-domain approach to ECD allows us to naturally go beyond the ground-state rotationally averaged ECD spectrum, which is the standard outcome of the linear-response theory, e.g., by computing the ECD spectra from electronic excited states.
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Affiliation(s)
- M Monti
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - M Stener
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - E Coccia
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
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8
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Ayuso D. New opportunities for ultrafast and highly enantio-sensitive imaging of chiral nuclear dynamics enabled by synthetic chiral light. Phys Chem Chem Phys 2022; 24:10193-10200. [PMID: 35420074 DOI: 10.1039/d1cp05427a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Synthetic chiral light [D. Ayuso et al., Nat. Photon., 2019, 13, 866-871] has opened up new opportunities for ultrafast and highly efficient imaging and control of chiral matter. Here we show that the giant enantio-sensitivity enabled by such light could be exploited to probe chiral nuclear rearrangements during chemical reactions in a highly enantio-sensitive manner. Using a state-of-the-art implementation of real-time time-dependent density functional theory, we explore how the nonlinear response of the prototypical chiral molecule H2O2 changes as a function of its dihedral angle, which defines its handedness. The macroscopic intensity emitted from randomly oriented molecules at even harmonic frequencies (of the fundamental) depends strongly on this nuclear coordinate. Because of the ultrafast nature of such nonlinear interactions, the direct mapping between the dissymmetry factor and the nuclear geometry provides a way to probe chiral nuclear dynamics at their natural time scales. Our work paves the way for ultrafast and highly efficient imaging of enantio-sensitive dynamics in more complex chiral systems, including biologically relevant molecules.
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Affiliation(s)
- David Ayuso
- Department of Physics, Imperial College London, SW7 2AZ London, UK. .,Max-Born-Institut, Max-Born-Str. 2A, 12489 Berlin, Germany
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9
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Fedotov DA, Paul AC, Koch H, Santoro F, Coriani S, Improta R. Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study. Phys Chem Chem Phys 2022; 24:4987-5000. [PMID: 35142309 DOI: 10.1039/d1cp04340d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We study the excited state absorption (ESA) properties of the four DNA bases (thymine, cytosine, adenine, and guanine) by different single reference quantum mechanical methods, namely, equation of motion coupled cluster singles and doubles (EOM-CCSD), singles, doubles and perturbative triples (EOM-CC3), and time-dependent density functional theory (TD-DFT), with the long-range corrected CAM-B3LYP functional. Preliminary results at the Tamm-Dancoff (TDA) CAM-B3LYP level using the maximum overlap method (MOM) are reported for thymine. In the gas phase, the three methods predict similar One Photon Absorption (OPA) spectra, which are consistent with the experimental results and with the most accurate computational studies available in the literature. The ESA spectra are then computed for the ππ* states (one for pyrimidine, two for purines) associated with the lowest-energy absorption band, and for the close-lying nπ* state. The EOM-CC3, EOM-CCSD and CAM-B3LYP methods provide similar ESA spectral patterns, which are also in qualitative agreement with literature RASPT2 results. Once validated in the gas phase, TD-CAM-B3LYP has been used to compute the ESA in chloroform, including solvent effects by the polarizable continuum model (PCM). The predicted OPA and ESA spectra in chloroform are very similar to those in the gas phase, most of the bands shifting by less than 0.1 eV, with a small increase of the intensities and a moderate destabilization of the nπ* state. Finally, ESA spectra have been computed from the minima of the lowest energy ππ* state, and found in line with the available experimental transient absorption spectra of the nucleosides in solution, providing further validation of our computational approach.
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Affiliation(s)
- Daniil A Fedotov
- DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
| | - Alexander C Paul
- Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Henrik Koch
- Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway.,Scuola Normale Superiore, Piazza dei Cavalieri, 7, I-56126, Pisa, Italy.
| | - Fabrizio Santoro
- Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Area della Ricerca del CNR, I-56124 Pisa, Italy.
| | - Sonia Coriani
- DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. .,Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Roberto Improta
- Istituto di Biostrutture e Bioimmagini-CNR, I-80134 Napoli, Italy.
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10
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Andersen JH, Nanda KD, Krylov AI, Coriani S. Probing Molecular Chirality of Ground and Electronically Excited States in the UV-vis and X-ray Regimes: An EOM-CCSD Study. J Chem Theory Comput 2022; 18:1748-1764. [PMID: 35187935 DOI: 10.1021/acs.jctc.1c00937] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present several strategies for computing electronic circular dichroism (CD) spectra across different frequency ranges at the equation-of-motion coupled-cluster singles and doubles level of theory. CD spectra of both ground and electronically excited states are discussed. For selected cases, the approach is compared with coupled-cluster linear response results as well as time-dependent density functional theory. The extension of the theory to include the effect of spin-orbit coupling is presented and illustrated by calculations of X-ray CD spectra at the L-edge.
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Affiliation(s)
- Josefine H Andersen
- DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
| | - Kaushik D Nanda
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Anna I Krylov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Sonia Coriani
- DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
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11
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Morgenroth M, Scholz M, Cho MJ, Choi DH, Oum K, Lenzer T. Mapping the broadband circular dichroism of copolymer films with supramolecular chirality in time and space. Nat Commun 2022; 13:210. [PMID: 35017508 PMCID: PMC8752614 DOI: 10.1038/s41467-021-27886-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 12/17/2021] [Indexed: 01/30/2023] Open
Abstract
Measurements of the electronic circular dichroism (CD) are highly sensitive to the absolute configuration and conformation of chiral molecules and supramolecular assemblies and have therefore found widespread application in the chemical and biological sciences. Here, we demonstrate an approach to simultaneously follow changes in the CD and absorption response of photoexcited systems over the ultraviolet-visible spectral range with 100 fs time resolution. We apply the concept to chiral polyfluorene copolymer thin films and track their electronic relaxation in detail. The transient CD signal stems from the supramolecular response of the system and provides information regarding the recovery of the electronic ground state. This allows for a quantification of singlet-singlet annihilation and charge-pair formation processes. Spatial mapping of chiral domains on femtosecond time scales with a resolution of 50 μm and diffraction-limited steady-state imaging of the circular dichroism and the circularly polarised luminescence (CPL) of the films is demonstrated.
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Affiliation(s)
- Marius Morgenroth
- Department Chemistry and Biology, Physical Chemistry 2, Faculty IV: School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Mirko Scholz
- Department Chemistry and Biology, Physical Chemistry 2, Faculty IV: School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Min Ju Cho
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Dong Hoon Choi
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Kawon Oum
- Department Chemistry and Biology, Physical Chemistry 2, Faculty IV: School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany.
| | - Thomas Lenzer
- Department Chemistry and Biology, Physical Chemistry 2, Faculty IV: School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany.
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12
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Meskers SCJ. Circular Polarization of Luminescence as a Tool To Study Molecular Dynamical Processes. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100154] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Stefan C. J. Meskers
- Molecular Materials and Nanosystems and Institute for Complex Molecular Systems Eindhoven University of Technology P.O. box 513 (STW 4.37) NL 5600 MB Eindhoven Netherlands
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13
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Hache F, Changenet P. Multiscale conformational dynamics probed by time-resolved circular dichroism from seconds to picoseconds. Chirality 2021; 33:747-757. [PMID: 34523161 DOI: 10.1002/chir.23359] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 01/08/2023]
Abstract
Time-resolved circular dichroism has been developed for a few decades to investigate rapid conformational changes in (bio)molecules. In our group, we have come up with several experimental set-ups allowing us to study pico-nanosecond local phenomena in molecular systems as well as much slower effects occurring in proteins and DNA in the folding processes. After an overview of the worldwide realizations in this domain, we present emblematic experiments that we have carried out, spanning time domain from picoseconds to seconds.
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Affiliation(s)
- François Hache
- Optics and Biosciences Laboratory, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
| | - Pascale Changenet
- Optics and Biosciences Laboratory, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
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14
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Sharma A, Athanasopoulos S, Kumarasamy E, Phansa C, Asadpoordarvish A, Sabatini RP, Pandya R, Parenti KR, Sanders SN, McCamey DR, Campos LM, Rao A, Tayebjee MJY, Lakhwani G. Pentacene-Bridge Interactions in an Axially Chiral Binaphthyl Pentacene Dimer. J Phys Chem A 2021; 125:7226-7234. [PMID: 34433272 DOI: 10.1021/acs.jpca.1c05254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Molecular chirality can be exploited as a sensitive reporter of the nature of intra- and interchromophore interactions in π-conjugated systems. In this report, we designed an intramolecular singlet fission (iSF)-based pentacene dimer with an axially chiral binaphthyl bridge (2,2'-(2,2'-dimethoxy-[1,1'-binaphthalene]-3,3'-diyl) n-octyl-di-isopropyl silylethynyl dipentacene, BNBP) to utilize its chiroptical response as a marker of iSF chromophore-bridge-chromophore (SFC-β-SFC) interactions. The axial chirality of the bridge enforces significant one-handed excitonic coupling of the pentacene monomer units; as such, BNBP exhibits significant chiroptical response in the ground and excited states. We analyzed the chiroptical response of BNBP using the exciton coupling method and quadratic response density functional theory calculations to reveal that higher energy singlet transitions in BNBP involve significant delocalization of the electronic density on the bridging binaphthyl group. Our results highlight the promising application of chiroptical techniques to investigate the nature of SFC-β-SFC interactions that impact singlet fission dynamics.
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Affiliation(s)
- Ashish Sharma
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Stavros Athanasopoulos
- Departamento de Física, Universidad Carlos III de Madrid, Avenida Universidad 30, Leganés 28911, Madrid, Spain
| | - Elango Kumarasamy
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Chanakarn Phansa
- Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Amir Asadpoordarvish
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia.,ARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Randy P Sabatini
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Raj Pandya
- Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Kaia R Parenti
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Samuel N Sanders
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Dane R McCamey
- ARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Luis M Campos
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Akshay Rao
- Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Murad J Y Tayebjee
- Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.,School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Girish Lakhwani
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
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15
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Ilchen M, Schmidt P, Novikovskiy NM, Hartmann G, Rupprecht P, Coffee RN, Ehresmann A, Galler A, Hartmann N, Helml W, Huang Z, Inhester L, Lutman AA, MacArthur JP, Maxwell T, Meyer M, Music V, Nuhn HD, Osipov T, Ray D, Wolf TJA, Bari S, Walter P, Li Z, Moeller S, Knie A, Demekhin PV. Site-specific interrogation of an ionic chiral fragment during photolysis using an X-ray free-electron laser. Commun Chem 2021; 4:119. [PMID: 36697819 PMCID: PMC9814667 DOI: 10.1038/s42004-021-00555-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 07/20/2021] [Indexed: 01/28/2023] Open
Abstract
Short-wavelength free-electron lasers with their ultrashort pulses at high intensities have originated new approaches for tracking molecular dynamics from the vista of specific sites. X-ray pump X-ray probe schemes even allow to address individual atomic constituents with a 'trigger'-event that preludes the subsequent molecular dynamics while being able to selectively probe the evolving structure with a time-delayed second X-ray pulse. Here, we use a linearly polarized X-ray photon to trigger the photolysis of a prototypical chiral molecule, namely trifluoromethyloxirane (C3H3F3O), at the fluorine K-edge at around 700 eV. The created fluorine-containing fragments are then probed by a second, circularly polarized X-ray pulse of higher photon energy in order to investigate the chemically shifted inner-shell electrons of the ionic mother-fragment for their stereochemical sensitivity. We experimentally demonstrate and theoretically support how two-color X-ray pump X-ray probe experiments with polarization control enable XFELs as tools for chiral recognition.
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Affiliation(s)
- Markus Ilchen
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany ,grid.434729.f0000 0004 0590 2900European XFEL GmbH, Schenefeld, Germany ,Stanford PULSE Institute, Menlo Park, CA USA
| | - Philipp Schmidt
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany ,grid.434729.f0000 0004 0590 2900European XFEL GmbH, Schenefeld, Germany
| | - Nikolay M. Novikovskiy
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany ,grid.182798.d0000 0001 2172 8170Institute of Physics, Southern Federal University, Rostov-on-Don, Russia
| | - Gregor Hartmann
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany ,grid.424048.e0000 0001 1090 3682Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany
| | - Patrick Rupprecht
- grid.419604.e0000 0001 2288 6103Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany
| | - Ryan N. Coffee
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Arno Ehresmann
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany
| | - Andreas Galler
- grid.434729.f0000 0004 0590 2900European XFEL GmbH, Schenefeld, Germany
| | - Nick Hartmann
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Wolfram Helml
- grid.5675.10000 0001 0416 9637Fakultät für Physik, Technische Universität Dortmund, Dortmund, Germany
| | - Zhirong Huang
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Ludger Inhester
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - Alberto A. Lutman
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - James P. MacArthur
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Timothy Maxwell
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Michael Meyer
- grid.434729.f0000 0004 0590 2900European XFEL GmbH, Schenefeld, Germany
| | - Valerija Music
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany ,grid.434729.f0000 0004 0590 2900European XFEL GmbH, Schenefeld, Germany
| | - Heinz-Dieter Nuhn
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Timur Osipov
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Dipanwita Ray
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Thomas J. A. Wolf
- Stanford PULSE Institute, Menlo Park, CA USA ,grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Sadia Bari
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - Peter Walter
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - Zheng Li
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.11135.370000 0001 2256 9319State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, China
| | - Stefan Moeller
- grid.445003.60000 0001 0725 7771SLAC National Accelerator Laboratory, Menlo Park, CA USA
| | - André Knie
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany
| | - Philipp V. Demekhin
- grid.5155.40000 0001 1089 1036Institut für Physik und CINSaT, Universität Kassel, Kassel, Germany
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16
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Scott M, Rehn DR, Norman P, Dreuw A. Ab Initio Excited-State Electronic Circular Dichroism Spectra Exploiting the Third-Order Algebraic-Diagrammatic Construction Scheme for the Polarization Propagator. J Phys Chem Lett 2021; 12:5132-5137. [PMID: 34030439 DOI: 10.1021/acs.jpclett.1c00839] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Excited-state rotatory strengths are reported for the first time at a correlated ab initio level, here with the algebraic diagrammatic construction scheme of the polarization propagator up to the third order. To demonstrate the capabilities of this computational approach, the gas phase S1 electronic circular dichroism spectra of the bicyclic ketones (1R)-camphor, (1R)-norcamphor, and (1R)-fenchone have been calculated at the ADC(3) level of theory. Furthermore, the solution excited-state spectra of the energetically lowest conformer of R-(+)-1,1'-bi(2-naphthol) have been computed with inclusion of a polarizable continuum model at the ADC(2) level of theory.
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Affiliation(s)
- Mikael Scott
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Dirk R Rehn
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Patrick Norman
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
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17
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Kohl FR, Zhang Y, Charnay AP, Martínez-Fernández L, Kohler B. Ultrafast excited state dynamics of silver ion-mediated cytosine-cytosine base pairs in metallo-DNA. J Chem Phys 2021; 153:105104. [PMID: 32933288 DOI: 10.1063/5.0020463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
To better understand the nexus between structure and photophysics in metallo-DNA assemblies, the parallel-stranded duplex formed by the all-cytosine oligonucleotide, dC20, and silver nitrate was studied by circular dichroism (CD), femtosecond transient absorption spectroscopy, and time-dependent-density functional theory calculations. Silver(I) ions mediate Cytosine-Cytosine (CC) base pairs by coordinating to the N3 atoms of two cytosines. Although these silver(I) mediated CC base pairs resemble the proton-mediated CC base pairs found in i-motif DNA at first glance, a comparison of experimental and calculated CD spectra reveals that silver ion-mediated i-motif structures do not form. Instead, the parallel-stranded duplex formed between dC20 and silver ions is proposed to contain consecutive silver-mediated base pairs with high propeller twist-like ones seen in a recent crystal structure of an emissive, DNA-templated silver cluster. Femtosecond transient absorption measurements with broadband probing from the near UV to the near IR reveal an unusually long-lived (>10 ns) excited state in the dC20 silver ion complex that is not seen in dC20 in single-stranded or i-motif forms. This state is also absent in a concentrated solution of cytosine-silver ion complexes that are thought to assemble into planar ribbons or sheets that lack stacked silver(I) mediated CC base pairs. The large propeller twist angle present in metal-mediated base pairs may promote the formation of long-lived charged separated or triplet states in this metallo-DNA.
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Affiliation(s)
- Forrest R Kohl
- Department of Chemistry and Biochemistry, 100 W. 18th Ave., Columbus, Ohio 43210, USA
| | - Yuyuan Zhang
- Department of Chemistry and Biochemistry, 100 W. 18th Ave., Columbus, Ohio 43210, USA
| | - Aaron P Charnay
- Department of Chemistry and Biochemistry, 100 W. 18th Ave., Columbus, Ohio 43210, USA
| | - Lara Martínez-Fernández
- Departamento de Química, Facultad de Ciencias and Institute for Advanced Research in Chemistry (IADCHEM), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Bern Kohler
- Department of Chemistry and Biochemistry, 100 W. 18th Ave., Columbus, Ohio 43210, USA
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18
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Lin TC, Liu ZY, Liu SH, Koshevoy IO, Chou PT. Counterion Migration Driven by Light-Induced Intramolecular Charge Transfer. JACS AU 2021; 1:282-293. [PMID: 34467293 PMCID: PMC8395631 DOI: 10.1021/jacsau.0c00107] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Indexed: 05/14/2023]
Abstract
A series of D-π-A + pyridinium compounds, in which D = -NPh2 and A+ = -PyMe+ are linked by various amounts of linear phenyl spacers, were strategically designed and synthesized. Their characterization revealed the presence of excited-state intramolecular charge transfer (ESICT) that triggers a corresponding response from the counterion. In medium and strong polar solvents, the fast solvent relaxation occurring after ESICT overwhelms the counterion effect, showing typical emission solvatochromism. In weakly polar solvents, ESICT induces counteranion migration for electrostatic stabilization, the time scale of which is dependent on the radius of the counteranion, the length of the π-linker, and the viscosity of the solvent. In low-viscosity organic solvents such as toluene, counteranion migration occurs within several tens to hundreds of picoseconds, resulting in a time-dependent continuous emission that can be resolved from the spectral temporal evolution. Concrete evidence for this is provided by the chemical synthesis of a D-π-A + pyridinium-sulfur trioxide- zwitterion, where anion migration is restricted due to its internally locked ion pair. As a result, only a single emission band can be observed. These comprehensive studies prove that the ion migration process may be significant for a wide range of ESICT-type ionic fluorophores. Such an ionic movement, triggered by optically pumped ESICT of the D-π-A + dyad, is similar to the molecular machine driven by the redox reaction, but with a facile access and fast response.
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Affiliation(s)
- Ta-Chun Lin
- Department
of Chemistry, National Taiwan University, Taipei, Taiwan 10617, ROC
| | - Zong-Ying Liu
- Department
of Chemistry, National Taiwan University, Taipei, Taiwan 10617, ROC
| | - Shih-Hung Liu
- Department
of Chemistry, National Taiwan University, Taipei, Taiwan 10617, ROC
| | - Igor O. Koshevoy
- Department
of Chemistry, University of Eastern Finland, Yliopistokatu 7, 80101 Joensuu, Finland
| | - Pi-Tai Chou
- Department
of Chemistry, National Taiwan University, Taipei, Taiwan 10617, ROC
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19
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Fedotov DA, Paul AC, Posocco P, Santoro F, Garavelli M, Koch H, Coriani S, Improta R. Excited-State Absorption of Uracil in the Gas Phase: Mapping the Main Decay Paths by Different Electronic Structure Methods. J Chem Theory Comput 2021; 17:1638-1652. [PMID: 33529532 DOI: 10.1021/acs.jctc.0c01150] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We present a computational study of the one-photon and excited-state absorption (ESA) from the two lowest energy excited states of uracil in the gas phase: an nπ* dark state (1n) and the lowest energy bright ππ* state (1π). The predictions of six different linear response electronic structure methods, namely, TD-CAM-B3LYP, EOM-CCSD, EOM-CC3, ADC(2), ADC(2)-x, and ADC(3) are critically compared. In general, the spectral shapes predicted by TD-CAM-B3LYP, EOM-CCSD, EOM-CC3, and ADC(3) are fairly similar, though the quality of TD-CAM-B3LYP slightly deteriorates in the high-energy region. By computing the spectra at some key structures on different potential energy surfaces (PES), that is, the Franck-Condon point, the 1n minimum, and structures representative of different regions of the 1π PES, we obtain important insights into the shift of the ESA spectra, following the motion of the wavepacket on the excited-state PES. Though 1π has larger ESA than 1n, some spectral regions are dominated by these latter signals. Aside from its methodological interest, we thus obtain interesting indications to interpret transient absorption spectra to disentangle the photoactivated dynamics of nucleobases.
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Affiliation(s)
- Daniil A Fedotov
- DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
| | - Alexander C Paul
- Department of Chemistry, NTNU-Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Paolo Posocco
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, via L. Giorgieri 1, I-34127 Trieste, Italy
| | - Fabrizio Santoro
- Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Area della Ricerca del CNR, Via Moruzzi 1, I-56124 Pisa, Italy
| | - Marco Garavelli
- Department of Industrial Chemistry "Toso Montanari", Università degli Studi di Bologna, I-40126 Bologna, Italy
| | - Henrik Koch
- Department of Chemistry, NTNU-Norwegian University of Science and Technology, N-7491 Trondheim, Norway.,Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56100 Pisa, Italy
| | - Sonia Coriani
- DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark.,Department of Chemistry, NTNU-Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Roberto Improta
- Istituto di Biostrutture e Bioimmagini-CNR, Via Mezzocannone 6, I-80134 Napoli, Italy
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20
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Scholz M, Morgenroth M, Cho MJ, Choi DH, Oum K, Lenzer T. Ultrafast Broadband Transient Absorption and Circular Dichroism Reveal Relaxation of a Chiral Copolymer. J Phys Chem Lett 2019; 10:5160-5166. [PMID: 31436421 DOI: 10.1021/acs.jpclett.9b02061] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We present a study of the photoinduced dynamics of the chiral polyfluorene-phenylene copolymer PFPh in THF and in cholesteric thin films. After photoexcitation at 370 nm in THF, ultraviolet-visible-near-infrared (UV-vis-NIR) transient absorption spectra show fast subpicosecond to picosecond intrachain migration of singlet excitons, solvation dynamics, and an exciton lifetime of 410 ps. The PFPh thin film features also interchain singlet exciton migration and exhibits shorter (2.1 and 240 ps) and longer lifetime components (2800 ps, interchain recombination). Furthermore, a setup for ultrafast UV-vis broadband transient circular dichroism (TrCD) spectroscopy has been developed. Fast supramolecular relaxation processes are observed, which are linked to changes in the anisotropic polarizability and pitch length of the cholesteric film. Such combined ultrafast transient CD and absorption experiments hold promise to reveal not only details of relaxation processes in supramolecular arrangements but also structural rearrangements of chiral molecular systems featuring CD signals in the UV-vis region.
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Affiliation(s)
- Mirko Scholz
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Marius Morgenroth
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Min Ju Cho
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul 136-701, Korea
| | - Dong Hoon Choi
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul 136-701, Korea
| | - Kawon Oum
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Thomas Lenzer
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
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21
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Chen MT, Zhang Y, Vysotsky MO, Lindner JO, Li MH, Lin MJ, Würthner F. 1,1′-Bi(2-naphthol-4,5-dicarboximide)s: blue emissive axially chiral scaffolds with aggregation-enhanced emission properties. Org Chem Front 2019. [DOI: 10.1039/c9qo01090d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Novel electron-deficient 1,1′-binaphthol derivatives bearing two dicarboximide groups at the peri-positions show intense blue luminescence and aggregation-enhanced emission characteristics.
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Affiliation(s)
- Meng-Ting Chen
- State Key Laboratory of Photocatalysis on Energy and Environment
- College of Chemistry
- Fuzhou University
- 350116 Fuzhou
- China
| | - Yang Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment
- College of Chemistry
- Fuzhou University
- 350116 Fuzhou
- China
| | - Myroslav O. Vysotsky
- Institut für Organische Chemie & Center for Nanosystems Chemistry
- Universität Würzburg
- 97074 Würzburg
- Germany
| | - Joachim O. Lindner
- Institut für Organische Chemie & Center for Nanosystems Chemistry
- Universität Würzburg
- 97074 Würzburg
- Germany
| | - Meng-Hua Li
- State Key Laboratory of Photocatalysis on Energy and Environment
- College of Chemistry
- Fuzhou University
- 350116 Fuzhou
- China
| | - Mei-Jin Lin
- State Key Laboratory of Photocatalysis on Energy and Environment
- College of Chemistry
- Fuzhou University
- 350116 Fuzhou
- China
| | - Frank Würthner
- Institut für Organische Chemie & Center for Nanosystems Chemistry
- Universität Würzburg
- 97074 Würzburg
- Germany
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