1
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Fureraj I, Wega J, Balanikas E, Puji Pamungkas KK, Sakai N, Matile S, Vauthey E. Excitation-Wavelength-Dependent Photophysics of a Torsionally Disordered Push-Pull Dye. J Phys Chem Lett 2024:7857-7862. [PMID: 39052969 DOI: 10.1021/acs.jpclett.4c01840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
The torsional disorder of conjugated dyes in the electronic ground state can lead to inhomogeneous broadening of the S1 ←S0 absorption band, allowing for the selective photoexcitation of molecules with different amounts of distortion. Here, we investigate how this affects electronic transitions to upper excited states. We show that torsion of a core-alkynylated push-pull dye can have opposite effects on the oscillator strength of its lowest-energy transitions. Consequently, photoselection of planar and twisted molecules can be achieved by exciting in distinct absorption bands. Whereas this has limited effect in liquids due to fast planarization of the excited molecules, it strongly affects the overall photophysics in a polymeric environment, where torsional motion is hindered, allowing for the photoselection of molecules with different fluorescence quantum yields and intersystem-crossing dynamics.
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Affiliation(s)
- Ina Fureraj
- Department of Physical Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
| | - Johannes Wega
- Department of Physical Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
| | - Evangelos Balanikas
- Department of Physical Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
| | | | - Naomi Sakai
- Department of Organic Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
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2
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Hayashi H, Ishigaki Y, Koizumi T. Preparation and Comparison of Chemical Properties of Phenazasiline Monomer, Dimer, Trimer, and Polymer. ChemistrySelect 2020. [DOI: 10.1002/slct.202003121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hideki Hayashi
- Nagoya Municipal Industrial Research Institute 3-4-4 Rokuban Atsuta-ku, Nagoya 456-0058 Japan
| | - Yuzo Ishigaki
- Nagoya Municipal Industrial Research Institute 3-4-4 Rokuban Atsuta-ku, Nagoya 456-0058 Japan
| | - Take‐aki Koizumi
- Laboratory for Chemistry and Life Science Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
- School of Materials and Chemical Technology Tokyo Institute of Technology Yokohama 226–8503 Japan
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3
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Nelson TR, White AJ, Bjorgaard JA, Sifain AE, Zhang Y, Nebgen B, Fernandez-Alberti S, Mozyrsky D, Roitberg AE, Tretiak S. Non-adiabatic Excited-State Molecular Dynamics: Theory and Applications for Modeling Photophysics in Extended Molecular Materials. Chem Rev 2020; 120:2215-2287. [PMID: 32040312 DOI: 10.1021/acs.chemrev.9b00447] [Citation(s) in RCA: 198] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Optically active molecular materials, such as organic conjugated polymers and biological systems, are characterized by strong coupling between electronic and vibrational degrees of freedom. Typically, simulations must go beyond the Born-Oppenheimer approximation to account for non-adiabatic coupling between excited states. Indeed, non-adiabatic dynamics is commonly associated with exciton dynamics and photophysics involving charge and energy transfer, as well as exciton dissociation and charge recombination. Understanding the photoinduced dynamics in such materials is vital to providing an accurate description of exciton formation, evolution, and decay. This interdisciplinary field has matured significantly over the past decades. Formulation of new theoretical frameworks, development of more efficient and accurate computational algorithms, and evolution of high-performance computer hardware has extended these simulations to very large molecular systems with hundreds of atoms, including numerous studies of organic semiconductors and biomolecules. In this Review, we will describe recent theoretical advances including treatment of electronic decoherence in surface-hopping methods, the role of solvent effects, trivial unavoided crossings, analysis of data based on transition densities, and efficient computational implementations of these numerical methods. We also emphasize newly developed semiclassical approaches, based on the Gaussian approximation, which retain phase and width information to account for significant decoherence and interference effects while maintaining the high efficiency of surface-hopping approaches. The above developments have been employed to successfully describe photophysics in a variety of molecular materials.
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Affiliation(s)
- Tammie R Nelson
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Alexander J White
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Josiah A Bjorgaard
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Andrew E Sifain
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States.,U.S. Army Research Laboratory , Aberdeen Proving Ground , Maryland 21005 , United States
| | - Yu Zhang
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Benjamin Nebgen
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | | | - Dmitry Mozyrsky
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Adrian E Roitberg
- Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States
| | - Sergei Tretiak
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
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4
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Söderberg M, Dereka B, Marrocchi A, Carlotti B, Vauthey E. Ground-State Structural Disorder and Excited-State Symmetry Breaking in a Quadrupolar Molecule. J Phys Chem Lett 2019; 10:2944-2948. [PMID: 31081644 DOI: 10.1021/acs.jpclett.9b01024] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The influence of torsional disorder around the ethynyl π-bridges of a linear D-π-A-π-D molecule on the nature of its S1 excited state was investigated using ultrafast time-resolved infrared spectroscopy. By tuning the pump wavelength throughout the S1 ← S0 absorption band, subpopulations with different extents of asymmetry could be excited. In nonpolar solvents, the equilibrated S1 state is symmetric and quadrupolar independently of the initial degree of distortion. Photoexcitation of distorted molecules is followed by planarization and symmetrization of the S1 state. Excited-state symmetry breaking is only observed in polar environments, where the equilibrated S1 state has a strong dipolar character. However, neither the extent nor the rate of symmetry breaking are enhanced in an initially distorted molecule. They are only determined by the polarity and the dynamic properties of the solvent.
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Affiliation(s)
- Magnus Söderberg
- Department of Physical Chemistry , University of Geneva , 30 quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
| | - Bogdan Dereka
- Department of Physical Chemistry , University of Geneva , 30 quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
| | - Assunta Marrocchi
- Department of Chemistry, Biology and Biotechnology , University of Perugia , via Elce di Sotto 8 , 06123 Perugia , Italy
| | - Benedetta Carlotti
- Department of Chemistry, Biology and Biotechnology , University of Perugia , via Elce di Sotto 8 , 06123 Perugia , Italy
| | - Eric Vauthey
- Department of Physical Chemistry , University of Geneva , 30 quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
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5
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Kozhemyakin Y, Krämer M, Rominger F, Dreuw A, Bunz UHF. A Tethered Tolane: Twisting the Excited State. Chemistry 2018; 24:15219-15222. [PMID: 30105868 DOI: 10.1002/chem.201804095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 08/13/2018] [Indexed: 11/05/2022]
Abstract
The synthesis of a doubly bridged tolane is reported. The target is obtained in a five-step synthesis, starting from commercially available 2-amino-meta-xylene by a combination of a Sandmeyer reaction, radical bromination, and Stille-type coupling, followed by double ring closing. The doubly tethered tolane is crystalline; the two phenyl rings are highly twisted with respect to each other both in solution and in the solid state. Optical spectroscopy and quantum chemical calculations show that the doubly bridged tolane is twisted not only in the ground state, but also in the excited state, leading to emission from the twisted state in solution and in the solid state. Strong phosphorescence is observed at cryogenic temperatures.
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Affiliation(s)
- Yury Kozhemyakin
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Maximilian Krämer
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 205, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Andreas Dreuw
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 205, 69120, Heidelberg, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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6
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Kozhemyakin Y, Kretzschmar A, Krämer M, Rominger F, Dreuw A, Bunz UHF. Synthesis and Properties of Functional Twisted Tolanes. Chemistry 2017; 23:9908-9918. [DOI: 10.1002/chem.201701519] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Yury Kozhemyakin
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Andreas Kretzschmar
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Maximilian Krämer
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 205 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Andreas Dreuw
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 205 69120 Heidelberg Germany
- Centre for Advanced Materials; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 225 69120 Heidelberg Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Centre for Advanced Materials; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 225 69120 Heidelberg Germany
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7
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Wu J, Tan C, Zhou X, Tan Y, Yang P, Jiang Y. Molecular weight analysis of water-soluble poly(phenylene ethynylene)s using MALDI-TOF MS. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jiatao Wu
- Department of Chemistry; Tsinghua University; Beijing 100084 People's Republic of China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology; The Graduate School at Shenzhen, Tsinghua University; Shenzhen 518055 People's Republic of China
| | - Chunyan Tan
- Department of Chemistry; Tsinghua University; Beijing 100084 People's Republic of China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology; The Graduate School at Shenzhen, Tsinghua University; Shenzhen 518055 People's Republic of China
| | - Xinwen Zhou
- Institutes of Biomedical Sciences, Fudan University; Shanghai 200032 People's Republic of China
| | - Ying Tan
- Department of Chemistry; Tsinghua University; Beijing 100084 People's Republic of China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology; The Graduate School at Shenzhen, Tsinghua University; Shenzhen 518055 People's Republic of China
| | - Pengyuan Yang
- Institutes of Biomedical Sciences, Fudan University; Shanghai 200032 People's Republic of China
| | - Yuyang Jiang
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology; The Graduate School at Shenzhen, Tsinghua University; Shenzhen 518055 People's Republic of China
- Department of Pharmacology and Pharmaceutical Sciences; School of Medicine, Tsinghua University; Beijing 100084 People's Republic of China
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8
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Seintis K, Agathangelou D, Cvejn D, Almonasy N, Bureš F, Giannetas V, Fakis M. Femtosecond to nanosecond studies of octupolar molecules and their quadrupolar and dipolar analogues. Phys Chem Chem Phys 2017; 19:16485-16497. [DOI: 10.1039/c7cp01463e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The fs–ps anisotropy dynamics of octupolar, quadrupolar and dipolar molecules with different π-bridges.
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Affiliation(s)
- K. Seintis
- Department of Physics
- University of Patras
- Patras
- Greece
| | | | - D. Cvejn
- Institute of Organic Chemistry and Technology
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - N. Almonasy
- Institute of Organic Chemistry and Technology
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - F. Bureš
- Institute of Organic Chemistry and Technology
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - V. Giannetas
- Department of Physics
- University of Patras
- Patras
- Greece
| | - M. Fakis
- Department of Physics
- University of Patras
- Patras
- Greece
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9
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Roy S, Hazra A, Bandyopadhyay A, Raut D, Madhuri PL, Rao DSS, Ramamurty U, Pati SK, Krishna Prasad S, Maji TK. Reversible Polymorphism, Liquid Crystallinity, and Stimuli-Responsive Luminescence in a Bola-amphiphilic π-System: Structure-Property Correlations Through Nanoindentation and DFT Calculations. J Phys Chem Lett 2016; 7:4086-4092. [PMID: 27689314 DOI: 10.1021/acs.jpclett.6b01891] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report the design, synthesis, detailed characterization, and analysis of a new multifunctional π-conjugated bola-amphiphilic chromophore: oligo-(p-phenyleneethynylene)dicarboxylic acid with dialkoxyoctadecyl side chains (OPE-C18-1). OPE-C18-1 shows two polymorphs at 123 K (OPE-C18-1') and 373 K (OPE-C18-1″), whose crystal structures were characterized via single crystal X-ray diffraction. OPE-C18-1 also exhibits thermotropic liquid crystalline property revealing a columnar phase. The inherent π-conjugation of OPE-C18-1 imparts luminescence to the system. Photoluminescence measurements on the mesophase also reveal similar luminescence as in the crystalline state. Additionally, OPE-C18-1 shows mechano-hypsochromic luminescence behavior. Density functional theory (DFT)-based calculations unravel the origins behind the simultaneous existence of all these properties. Nanoindentation experiments on the single crystal reveal its mechanical strength and accurately correlate the molecular arrangement with the liquid crystalline and mechanochromic luminescence behavior.
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Affiliation(s)
| | | | | | - Devraj Raut
- Department of Materials Engineering, Indian Institute of Science , Bangalore 560 012, India
| | - P Lakshmi Madhuri
- Centre for Nano and Soft Matter Sciences , Jalahalli, Bangalore 560013, India
| | - D S Shankar Rao
- Centre for Nano and Soft Matter Sciences , Jalahalli, Bangalore 560013, India
| | - Upadrasta Ramamurty
- Department of Materials Engineering, Indian Institute of Science , Bangalore 560 012, India
| | | | - S Krishna Prasad
- Centre for Nano and Soft Matter Sciences , Jalahalli, Bangalore 560013, India
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10
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Wierzbicka M, Bylińska I, Sikorski A, Czaplewski C, Wiczk W. Experimental and theoretical studies of spectroscopic properties of simple symmetrically substituted diphenylbuta-1,3-diyne derivatives. Photochem Photobiol Sci 2016; 14:2251-60. [PMID: 26536160 DOI: 10.1039/c5pp00150a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of symmetrically substituted diphenylbuta-1,3-diyne (DPB) derivatives possessing electron-donating (N,N-dimethylamino or methoxy) or electron-accepting (nitrile, ester or aldehyde) groups have been prepared and studied with emphasis on their spectral and photophysical properties. The photophysical characteristics of these compounds have been studied in relation to their structures and influence of solvents or temperature. The observed spectral and photophysical properties are explained with the help of potential energy maps in the ground and excited states obtained from density functional theory (DFT, B3LYP, def2TZVP basis set) calculations. The structure-property relationship of all of the compounds is discussed and compared with appropriate diphenylacetylene derivatives.
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Affiliation(s)
| | - Irena Bylińska
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Artur Sikorski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Cezary Czaplewski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Wiesław Wiczk
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
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11
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Bylińska I, Wierzbicka M, Czaplewski C, Wiczk W. Photophysical properties of symmetrically substituted diarylacetylenes and diarylbuta-1,3-diynes. Photochem Photobiol Sci 2016; 15:45-56. [DOI: 10.1039/c5pp00197h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of symmetrically substituted diarylacetylenes and diaryl-1,3-butadiynes were prepared and studied with an emphasis on their spectral and photophysical properties.
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Affiliation(s)
- Irena Bylińska
- Faculty of Chemistry
- University of Gdańsk
- Wita Stwosza 63
- Poland
| | | | | | - Wiesław Wiczk
- Faculty of Chemistry
- University of Gdańsk
- Wita Stwosza 63
- Poland
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12
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Kim W, Sung J, Park KH, Shimizu H, Imamura M, Han M, Sim E, Iyoda M, Kim D. The Role of Linkers in the Excited-State Dynamic Planarization Processes of Macrocyclic Oligothiophene 12-Mers. J Phys Chem Lett 2015; 6:4444-4450. [PMID: 26495968 DOI: 10.1021/acs.jpclett.5b02189] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Linkers adjoining chromophores play an important role in modulating the structure of conjugated systems, which is bound up with their photophysical properties. However, to date, the focus of works dealing with linker effects was limited only to linear π-conjugated materials, and there have been no detailed studies on cyclic counterparts. Herein we report the linker effects on the dynamic planarization processes of π-conjugated macrocyclic oligothiophene 12-mers, where the different ratio between ethynylene and vinylene linkers was chosen to control the backbone rigidity. By analyzing transient fluorescence spectra, we demonstrate that the connecting linkers play a crucial role in the excited-state dynamics of cyclic conjugated systems. Faster dynamic planarization, longer exciton delocalization length, and higher degree of planarity were observed in vinylene inserted cyclic oligothiophenes. Molecular dynamics simulations and density functional theory calculations also stress the importance of the role of linkers in modulating the structure of cyclic oligothiophenes.
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Affiliation(s)
- Woojae Kim
- Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University , Seoul 03722, Korea
| | - Jooyoung Sung
- Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University , Seoul 03722, Korea
| | - Kyu Hyung Park
- Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University , Seoul 03722, Korea
| | - Hideyuki Shimizu
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University , Hachioji, Tokyo 192-0397, Japan
| | - Mika Imamura
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University , Hachioji, Tokyo 192-0397, Japan
| | - Minwoo Han
- Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University , Seoul 03722, Korea
| | - Eunji Sim
- Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University , Seoul 03722, Korea
| | - Masahiko Iyoda
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University , Hachioji, Tokyo 192-0397, Japan
| | - Dongho Kim
- Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University , Seoul 03722, Korea
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13
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Thiessen A, Würsch D, Jester SS, Aggarwal AV, Idelson A, Bange S, Vogelsang J, Höger S, Lupton JM. Exciton Localization in Extended π-Electron Systems: Comparison of Linear and Cyclic Structures. J Phys Chem B 2015; 119:9949-58. [DOI: 10.1021/acs.jpcb.5b02091] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Thiessen
- Department
of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
| | - Dominik Würsch
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
| | - Stefan-S. Jester
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - A. Vikas Aggarwal
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - Alissa Idelson
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - Sebastian Bange
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
| | - Jan Vogelsang
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
| | - Sigurd Höger
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - John M. Lupton
- Department
of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
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14
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Meza D, Arias E, Moggio I, Romero J, Mata JM, Jiménez-Barrera RM, Ziolo RF, Rodríguez O, Ottonelli M. Synthesis and photophysical and supramolecular study of π-conjugated (diethylene glycol methyl ether) benzoateethynylene oligomers and polymers. Polym Chem 2015. [DOI: 10.1039/c4py01516a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The strong π–π interaction that governs (diethylene glycol methyl ether) benzoateethynylene macromolecules was evidenced by X-ray scattering and HRTEM.
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Affiliation(s)
- D. Meza
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | - E. Arias
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | - I. Moggio
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | - J. Romero
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | - J. M. Mata
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | | | - R. F. Ziolo
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | - O. Rodríguez
- Centro de Investigación en Química Aplicada (CIQA)
- Saltillo
- México
| | - M. Ottonelli
- Dipartimento di Chimica e Chimica Industriale
- Universitá di Genova
- 16146 Genoa
- Italy
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15
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Wierzbicka M, Bylińska I, Czaplewski C, Wiczk W. Experimental and theoretical studies of the spectroscopic properties of simple symmetrically substituted diphenylacetylene derivatives. RSC Adv 2015. [DOI: 10.1039/c5ra01077b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
A series of symmetrically substituted diphenylacetylene derivatives possessing electron-donating or electron-accepting character were prepared and studied with respect to their spectral and photophysical properties.
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16
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Shi T, Li H, Tretiak S, Chernyak VY. How Geometric Distortions Scatter Electronic Excitations in Conjugated Macromolecules. J Phys Chem Lett 2014; 5:3946-3952. [PMID: 26276475 DOI: 10.1021/jz501912d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Effects of disorder and exciton-phonon interactions are the major factors controlling photoinduced dynamics and energy-transfer processes in conjugated organic semiconductors, thus defining their electronic functionality. All-atom quantum-chemical simulations are potentially capable of describing such phenomena in complex "soft" organic structures, yet they are frequently computationally restrictive. Here we efficiently characterize how electronic excitations in branched conjugated molecules interact with molecular distortions using the exciton scattering (ES) approach as a fundamental principle combined with effective tight-binding models. Molecule geometry deformations are incorporated to the ES view of electronic excitations by identifying the dependence of the Frenkel-type exciton Hamiltonian parameters on the characteristic geometry parameters. We illustrate our methodology using two examples of intermolecular distortions, bond length alternation and single bond rotation, which constitute vibrational degrees of freedom strongly coupled to the electronic system in a variety of conjugated systems. The effect on excited-state electronic structures has been attributed to localized variation of exciton on-site energies and couplings. As a result, modifications of the entire electronic spectra due to geometric distortions can be efficiently and accurately accounted for with negligible numerical cost. The presented approach can be potentially extended to model electronic structures and photoinduced processes in bulk amorphous polymer materials.
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Affiliation(s)
- Tian Shi
- †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Hao Li
- ‡Theoretical Division, Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Sergei Tretiak
- ‡Theoretical Division, Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- §Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Vladimir Y Chernyak
- †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
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Marcus M, Tozer OR, Barford W. Theory of optical transitions in conjugated polymers. II. Real systems. J Chem Phys 2014; 141:164102. [DOI: 10.1063/1.4897985] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Max Marcus
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, United Kingdom
- Magdalen College, University of Oxford, Oxford OX1 4AU, United Kingdom
| | - Oliver Robert Tozer
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, United Kingdom
- University College, University of Oxford, Oxford OX1 4BH, United Kingdom
| | - William Barford
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, United Kingdom
- Balliol College, University of Oxford, Oxford OX1 3BJ, United Kingdom
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18
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Zhao M, Yang F, Xue Y, Xiao D, Guo Y. A Time-Dependent DFT Study of the Absorption and Fluorescence Properties of Graphene Quantum Dots. Chemphyschem 2014; 15:950-7. [DOI: 10.1002/cphc.201301137] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Indexed: 11/05/2022]
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19
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Seehafer K, Bender M, Bunz UHF. Aggregation, Acidochromicity, and Metallochromicity of a Pyridine-Based Poly(aryleneethynylene). Macromolecules 2014. [DOI: 10.1021/ma402615q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kai Seehafer
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Markus Bender
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
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20
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Arias E, Moggio I, Torres R, Ziolo RF, Maldonado JL, Green K, Cooper TM, Wicks G, Rebane A, Drobizhev M, Makarov NS, Ottonelli M, Dellepiane G. Direct Synthesis of 2,5-Bis(dodecanoxy)phenyleneethynylene-Butadiynes by Sonogashira Coupling Reaction. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300230] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Menning S, Krämer M, Coombs BA, Rominger F, Beeby A, Dreuw A, Bunz UHF. Twisted Tethered Tolanes: Unanticipated Long-Lived Phosphorescence at 77 K. J Am Chem Soc 2013; 135:2160-3. [DOI: 10.1021/ja400416r] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sebastian Menning
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Maximilian Krämer
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
- Interdisziplinäres Zentrum
für Wissenschaftliches Rechnen, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg,
Germany
| | - Benjamin A. Coombs
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Andrew Beeby
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Andreas Dreuw
- Interdisziplinäres Zentrum
für Wissenschaftliches Rechnen, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg,
Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
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Duvanel G, Grilj J, Vauthey E. Ultrafast long-distance excitation energy transport in donor-bridge-acceptor systems. J Phys Chem A 2013; 117:918-28. [PMID: 23327635 DOI: 10.1021/jp311540x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The excited-state dynamics of two energy donor-bridge-acceptor (D-B-A) systems consisting of a zinc tetraphenylporphyrin (ZnP) and a free base tetraphenylporphyrin (FbP) bridged by oligo-p-phenyleneethynylene units with different substituents has been investigated using ultrafast spectroscopy. These systems differ by the location of the lowest singlet excited state of the bridge, just above or below the S(2) porphyrin states. In the first case, Soret band excitation of the porphyrins is followed by internal conversion to the local S(1) state of both molecules and by a S(1) energy transfer from the ZnP to the FbP end on the 10 ns time scale, as expected for a center-to-center distance of about 4.7 nm. On the other hand, if the bridge is excited, the energy is efficiently transferred within 1 ps to both porphyrin ends. Selective bridge excitation is not possible with the second system, because of the overlap of the absorption bands. However, the time-resolved spectroscopic data suggest a reversible conversion between the D*(S(2))-B-A and D-B*(S(1))-A states as well as a transition from the D-B*(S(1))-A to the D-B-A* states on the picosecond time scale. This implies that the local S(2) energy of the ZnP end can be transported stepwise to the FbP end, i.e., over about 4.7 nm, within 1 ps with an efficiency of more than 0.2.
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Affiliation(s)
- Guillaume Duvanel
- Department of Physical Chemistry, University of Geneva , 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
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23
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Bhattacharyya S, Paramanik B, Kundu S, Patra A. Energy/Hole Transfer Phenomena in Hybrid α-Sexithiophene (α-STH) Nanoparticle-CdTe Quantum-Dot Nanocomposites. Chemphyschem 2012; 13:4155-62. [DOI: 10.1002/cphc.201200694] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Indexed: 11/11/2022]
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24
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Ma C, Chan CTL, Kwok WM, Che CM. Ligand π-conjugation dictated intersystem crossing in phenyleneethynylene gold(i) complexes. Chem Sci 2012. [DOI: 10.1039/c2sc20038d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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25
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García LA, Arias E, Moggio I, Romero J, Ledezma A, Ponce A, Perez O. Fluorescent core-sheath fibers by electrospinning of a phenyleneethynylene/poly(styrene-co-maleimide) blend. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.09.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Lu W, Kwok WM, Ma C, Chan CTL, Zhu MX, Che CM. Organic triplet excited states of gold(I) complexes with oligo(o- or m-phenyleneethynylene) ligands: conjunction of steady-state and time-resolved spectroscopic studies on exciton delocalization and emission pathways. J Am Chem Soc 2011; 133:14120-35. [PMID: 21846130 DOI: 10.1021/ja205831v] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A series of mononuclear and binuclear gold(I) complexes containing oligo(o- or m-phenyleneethynylene) (PE) ligands, namely [PhC≡C(C(6)H(4)-1,2-C≡C)(n-1)Au(PCy(3))] (n = 2-4, 4a-c), [μ-{C≡C-(1,2-C(6)H(4)C≡C)(n)}{Au(PCy(3))}(2)] (n = 1-6, 8, 5a-g), [PhC≡C(C(6)H(4)-1,3-C≡C)(n-1)Au(PCy(3))] (n = 2-4, 6a-c), and [μ-{C≡C-(1,3-C(6)H(4)C≡C)(n)}{Au(PCy(3))}(2)] (n = 1, 2, 7a,b), were synthesized and structurally characterized. Extensive spectroscopic measurements have been performed by applying combined methods of femtosecond transient absorption (fs-TA), fs time-resolved fluorescence (fs-TRF), and nanosecond time-resolved emission (ns-TRE) coupled with steady-state absorption and emission spectroscopy at both ambient and low (77 K) temperatures to directly probe the temporal evolution of the excited states and to determine the dynamics and spectral signatures for the involved singlet (S(1)) and triplet (T(1)) excited states. The results reveal that S(1) and T(1) both feature ligand-centered electronic transitions with ππ* character associated with the phenyl and acetylene moieties. The (3)ππ* emission of the PE ligands is switched on by the attachment of [Au(PCy(3))](+) fragment(s) due to the heavy-atom effect. T(1)((3)ππ*) was found to form with nearly unity efficiency through intersystem crossing (ISC) from S(1)((1)ππ*). The ISC time constants were determined to be ∼50, 35, and 40 ps for 4b and 6a,b, respectively. Dual emission composed of fluorescence from S(1) and phosphorescence from T(1) were observed for most of the complexes except 5a and 7a, where only phosphorescence was found. The fluorescence at ambient temperature is accounted for by both the short-lived prompt fluorescence (PF) and long-lived delayed fluorescence (DF, lifetime on microsecond time scale). Explicit evidence was presented for a triplet-triplet annihilation mechanism for the generation of DF. Ligand length and substitution-dependent dynamics of T(1) are the key factors governing the dual emission character of the complexes. By extrapolation from the plot of emission energy against the PE chain length of the [Au(PCy(3))](+) complexes with oligo(o-PE) or oligo(m-PE) ligands, the triplet emission energies were estimated to be ∼530 and ∼470 nm for poly(o-PE) and poly(m-PE), respectively. Additionally, we assign the unusual red shifts of 983 cm(-1) from [PhC≡CAu(PCy(3))] (1) to [μ-{1,3-(C≡C)(2)C(6)H(4)}{Au(PCy(3))}(2)] (7a) and 462 cm(-1) from 7a to [μ(3)-{1,3,5-(C≡C)(3)C(6)H(3)}{Au(PCy(3))}(3)] (8) in the phosphorescence energies to excitonic coupling interactions between the C≡CAu(PCy(3)) arms in the triplet excited states. These complexes, together with those previously reported [Au(PCy(3))](+) complexes containing oligo(p-PE) ligands ( J. Am. Chem. Soc. 2002 , 124 , 14696 - 14706 ), form a collection of oligo(phenyleneethynylene) complexes exhibiting organic triplet emission in solution under ambient conditions. The remarkable feature of these complexes in exhibiting TTA prompted DF in conjunction with high formation efficiency of T(1)((3)ππ*) affords an opportunity for emission spectra to cover a wide range of wavelengths. This may have implication in the development of PE-based molecular materials for future optical applications.
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Affiliation(s)
- Wei Lu
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, People's Republic of China
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27
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Barford W, Boczarow I, Wharram T. Ultrafast Dynamical Localization of Photoexcited States in Conformationally Disordered Poly(p-phenylenevinylene). J Phys Chem A 2011; 115:9111-9. [DOI: 10.1021/jp204822h] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- William Barford
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford, OX1 3QZ, United Kingdom
- Balliol College, University of Oxford, Oxford, OX1 3BJ, United Kingdom
| | - Igor Boczarow
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford, OX1 3QZ, United Kingdom
- Balliol College, University of Oxford, Oxford, OX1 3BJ, United Kingdom
| | - Thomas Wharram
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford, OX1 3QZ, United Kingdom
- University College, University of Oxford, Oxford, OX1 4BH, United Kingdom
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28
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Nakayama H, Kimura S. Suppression of HOMO–LUMO Transition in a Twist Form of Oligo(phenyleneethynylene) Clamped by a Right-Handed Helical Peptide. J Phys Chem A 2011; 115:8960-8. [DOI: 10.1021/jp200997c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hidenori Nakayama
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shunsaku Kimura
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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29
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Sterpone F, Martinazzo R, Panda AN, Burghardt I. Coherent Excitation Transfer Driven by Torsional Dynamics: a Model Hamiltonian for PPV Type Systems. ACTA ACUST UNITED AC 2011. [DOI: 10.1524/zpch.2011.0117] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
A model Hamiltonian is proposed for systems of poly-phenylene-vinylene (PPV) type, which describes excitation energy transfer (EET) in the presence of torsional and bond-length-alternation coordinates that couple neighboring fragments. This model is employed to describe coherent EET, starting from a partially delocalized exciton state which is initially separated from the rest of the chain by a defect due to a pronounced torsional displacement at one of the inter-fragment junctions. EET is found to be driven by the restoring force of the torsions towards the planar geometry. Quantum dynamical calculations are carried out for a minimal five-site model, using the multiconfiguration time-dependent Hartree (MCTDH) method.
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Affiliation(s)
- Fabio Sterpone
- Institut de Biologie Physico-Chimique, Paris, Frankreich
| | - Rocco Martinazzo
- Università degli Studi di Milano, Dipartimento di Chimica-Fisica ed Elettrochimica, Milano, Italien
| | - Aditya N. Panda
- Ecole Normale Supérieure, Départment de Chimie, Paris, Frankreich
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30
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Li H, Wu C, Malinin SV, Tretiak S, Chernyak VY. Exciton Scattering on Symmetric Branching Centers in Conjugated Molecules. J Phys Chem B 2010; 115:5465-75. [DOI: 10.1021/jp110317d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hao Li
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Chao Wu
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, 182 Fitzpatrick Hall, Notre Dame, Indiana 46556, United States
| | - Sergey V. Malinin
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Sergei Tretiak
- Theoretical Division, Center for Nonlinear Studies, and Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Vladimir Y. Chernyak
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
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31
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Rosspeintner A, Angulo G, Onitsch C, Kivala M, Diederich F, Grampp G, Gescheidt G. Photophysics of two Prototypical Molecular-Wire Building Blocks: Solvent-Induced Conformational Dynamics? Chemphyschem 2010; 11:1700-10. [DOI: 10.1002/cphc.200901005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Spano FC, Silvestri L. Multiple mode exciton-vibrational coupling in H-aggregates: Synergistic enhancement of the quantum yield. J Chem Phys 2010; 132:094704. [DOI: 10.1063/1.3310810] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Wong BM. Optoelectronic Properties of Carbon Nanorings: Excitonic Effects from Time-Dependent Density Functional Theory. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2009; 113:21921-21927. [PMID: 22481999 PMCID: PMC3317592 DOI: 10.1021/jp9074674] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Revised: 10/31/2009] [Indexed: 05/21/2023]
Abstract
The electronic structure and size-scaling of optoelectronic properties in cycloparaphenylene carbon nanorings are investigated using time-dependent density functional theory (TDDFT). The TDDFT calculations on these molecular nanostructures indicate that the lowest excitation energy surprisingly becomes larger as the carbon nanoring size is increased, in contradiction with typical quantum confinement effects. In order to understand their unusual electronic properties, I performed an extensive investigation of excitonic effects by analyzing electron-hole transition density matrices and exciton binding energies as a function of size in these nanoring systems. The transition density matrices allow a global view of electronic coherence during an electronic excitation, and the exciton binding energies give a quantitative measure of electron-hole interaction energies in the nanorings. Based on overall trends in exciton binding energies and their spatial delocalization, I find that excitonic effects play a vital role in understanding the unique photoinduced dynamics in these carbon nanoring systems.
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Affiliation(s)
- Bryan M. Wong
- Materials Chemistry Department, Sandia National Laboratories, Livermore, California 94551
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34
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Yang JS, Yan JL, Lin CK, Chen CY, Xie ZY, Chen CH. Pentiptycene-Derived Oligo(p-phenyleneethynylene)s: Conformational Control, Chain-Length Effects, Localization of Excitation, and Intrachain Resonance Energy Transfer. Angew Chem Int Ed Engl 2009; 48:9936-9. [DOI: 10.1002/anie.200905405] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Yang JS, Yan JL, Lin CK, Chen CY, Xie ZY, Chen CH. Pentiptycene-Derived Oligo(p-phenyleneethynylene)s: Conformational Control, Chain-Length Effects, Localization of Excitation, and Intrachain Resonance Energy Transfer. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200905405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Castruita G, Arias E, Moggio I, Pérez F, Medellín D, Torres R, Ziolo R, Olivas A, Giorgetti E, Muniz-Miranda M. Synthesis, optical properties and supramolecular order of π-conjugated 2,5-di(alcoxy)phenyleneethynylene oligomers. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.07.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Egbe DAM, Carbonnier B, Birckner E, Grummt UW. Arylene-ethynylene/arylene-vinylene copolymers: Synthesis and structure–property relationships. Prog Polym Sci 2009. [DOI: 10.1016/j.progpolymsci.2009.03.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Yang JS, Yan JL, Liau KL, Tsai HHG, Hwang CY. Substituent effect on the ground- and excited-state torsional motions of pentiptycene-derived 1,4-bis(phenylethynyl)benzenes. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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One-dimensional Zn(II) oligo(phenyleneethynylene)dicarboxylate coordination polymers: Synthesis, crystal structures, thermal and photoluminescent properties. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.04.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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40
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Albu NM, Bergin E, Yaron DJ. Computational Design of a Light-Driven Molecular Motor. J Phys Chem A 2009; 113:7090-6. [DOI: 10.1021/jp811521s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicolae M. Albu
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
| | - Edward Bergin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
| | - David J. Yaron
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
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41
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Nakayama H, Kimura S. Chirally Twisted Oligo(phenyleneethynylene) by Cyclization with α-Helical Peptide. J Org Chem 2009; 74:3462-8. [DOI: 10.1021/jo9001905] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hidenori Nakayama
- Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shunsaku Kimura
- Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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42
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Dykstra TE, Hennebicq E, Beljonne D, Gierschner J, Claudio G, Bittner ER, Knoester J, Scholes GD. Conformational disorder and ultrafast exciton relaxation in PPV-family conjugated polymers. J Phys Chem B 2009; 113:656-67. [PMID: 19105646 DOI: 10.1021/jp807249b] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We report combined experimental and theoretical studies of excitation relaxation in poly[2-methoxy,5-(2'-ethyl-hexoxy)-1,4-phenylenevinylene] (MEH-PPV), oligophenylenevinylene (OPV) molecules of varying length, and model PPV chains. We build on the paradigm that the basic characteristics of conjugated polymers are decided by conformational subunits defined by conjugation breaks caused by torsional disorder along the chain. The calculations reported here indicate that for conjugated polymers like those in the PPV family, these conformational subunits electronically couple to neighboring subunits, forming subtly delocalized collective states of nanoscale excitons that determine the polymer optical properties. We find that relaxation among these exciton states can lead to a decay of anisotropy on ultrafast time scales. Unlike in Forster energy transfer, the exciton does not necessarily translate over a large distance. Nonetheless, the disorder in the polymer chain means that even small changes in the exciton size or location has a significant effect on the relaxation pathway and therefore the anisotropy decay.
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Affiliation(s)
- Tieneke E Dykstra
- Lash-Miller Chemical Laboratories, Institute for Optical Sciences and Centre for Quantum Information and Quantum Control, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 Canada
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Collini E, Scholes GD. Electronic and Vibrational Coherences in Resonance Energy Transfer along MEH-PPV Chains at Room Temperature. J Phys Chem A 2009; 113:4223-41. [DOI: 10.1021/jp810757x] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Elisabetta Collini
- Lash-Miller Chemical Laboratories, Institute for Optical Sciences and Centre for Quantum Information and Quantum Control, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Gregory D. Scholes
- Lash-Miller Chemical Laboratories, Institute for Optical Sciences and Centre for Quantum Information and Quantum Control, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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De Leener C, Hennebicq E, Sancho-Garcia JC, Beljonne D. Modeling the Dynamics of Chromophores in Conjugated Polymers: The Case of Poly(2-methoxy-5-(2′-ethylhexyl)oxy 1,4-phenylene vinylene) (MEH-PPV). J Phys Chem B 2009; 113:1311-22. [DOI: 10.1021/jp8029902] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Caroline De Leener
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, 20 Place du Parc, B-7000 Mons, Belgium, and Departamento de Química Física, Universidad de Alicante, E-03080 Alicante, Spain
| | - Emmanuelle Hennebicq
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, 20 Place du Parc, B-7000 Mons, Belgium, and Departamento de Química Física, Universidad de Alicante, E-03080 Alicante, Spain
| | - Juan-Carlos Sancho-Garcia
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, 20 Place du Parc, B-7000 Mons, Belgium, and Departamento de Química Física, Universidad de Alicante, E-03080 Alicante, Spain
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, 20 Place du Parc, B-7000 Mons, Belgium, and Departamento de Química Física, Universidad de Alicante, E-03080 Alicante, Spain
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Barford W, Paiboonvorachat N. Excitons in conjugated polymers: Wavefunctions, symmetries, and quantum numbers. J Chem Phys 2008; 129:164716. [DOI: 10.1063/1.3001584] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Liu T, Zhang HX, Xia BH. Theoretical studies of the electronic structures and optical properties of stable blue-emitting polymer based on 4H-cyclopenta-[def]-phenanthrene. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.02.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Pu KY, Qi XY, Yang YL, Lu XM, Li TC, Fan QL, Wang C, Liu B, Chan H, Huang W. Supramolecule-Regulated Photophysics of Oligo(p-phenyleneethynylene)-Based Rod–Coil Block Copolymers: Effect of Molecular Architecture. Chemistry 2008; 14:1205-15. [DOI: 10.1002/chem.200700305] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Igumenshchev KI, Tretiak S, Chernyak VY. Excitonic effects in a time-dependent density functional theory. J Chem Phys 2007; 127:114902. [PMID: 17887875 DOI: 10.1063/1.2773727] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Excited state properties of one-dimensional molecular materials are dominated by many-body interactions resulting in strongly bound confined excitons. These effects cannot be neglected or treated as a small perturbation and should be appropriately accounted for by electronic structure methodologies. We use adiabatic time-dependent density functional theory to investigate the electronic structure of one-dimensional organic semiconductors, conjugated polymers. Various commonly used functionals are applied to calculate the lowest singlet and triplet state energies and oscillator strengths of the poly(phenylenevinylene) and ladder-type (poly)(para-phenylene) oligomers. Local density approximations and gradient-corrected functionals cannot describe bound excitonic states due to lack of an effective attractive Coulomb interaction between photoexcited electrons and holes. In contrast, hybrid density functionals, which include long-range nonlocal and nonadiabatic corrections in a form of a fraction of Hartree-Fock exchange, are able to reproduce the excitonic effects. The resulting finite exciton sizes are strongly dependent on the amount of the orbital exchange included in the functional.
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Beeby A, Findlay KS, Goeta AE, Porrès L, Rutter SR, Thompson AL. Engineering a twist in 9,10-diethynylanthracenes by steric interactions. Photochem Photobiol Sci 2007; 6:982-6. [PMID: 17721597 DOI: 10.1039/b707750e] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 9,10-bis(phenylethynyl)anthracenes decorated with sterically demanding tert-butyl substituents have been prepared and spectroscopically characterised. We demonstrate that the introduction of two bulky substituents in the ortho position of the phenyl rings effectively locks the ground state into a conformation in which the three rings are orthogonal. Fluorescence spectroscopy reveals evidence for partial planarisation of this compound in the excited state at ambient temperature, but this is prevented in low temperature solvent glasses.
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Affiliation(s)
- Andrew Beeby
- Department of Chemistry, University of Durham, Durham, UK.
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