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Gonçalves Dalkiranis G, Costa Basílio F, Nobuyasu RS, de Fátima Curcino da Silva S, Lucia Dias Nogueira S, Moreira Therézio E, Serein-Spirau F, Silva RA, Marletta A. Photoluminescent ellipsometric circular dichroism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122437. [PMID: 36758363 DOI: 10.1016/j.saa.2023.122437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 01/11/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
A novel spectroscopic technique, photoluminescent ellipsometric circular dichroism (PECD), which distinguishes all radiative electronic transitions related to molecular chiral centers. Additionally, it is proposed as complementary to the ellipsometric Raman spectroscopy (ERS) technique, thus establishing a relationship between vibrational modes and electronic transitions, associated with molecular chiral centers. In this way, PECD turns into a powerful technique for chiral material characterization. The PECD technique was performed on a chiral oligomer (1R,2R)-diiminocyclohexane, and its derivative polymer. A complete photophysical characterization in solution was performed to corroborate the new PECD technique.
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Affiliation(s)
- Gustavo Gonçalves Dalkiranis
- Physics Institute of São Carlos, University of São Paulo, 13560-970 São Carlos, SP, Brazil; Catalan Institute of Nanoscience and Nanotechnology (ICN2), Edifici ICN2, Campus UAB, 08193, Bellaterra, Barcelona, Spain.
| | | | - Roberto S Nobuyasu
- Physics and Chemistry Institute, Federal University of Itajubá, CEP 37500-903 Itajubá, MG, Brazil
| | | | | | | | - Françoise Serein-Spirau
- Institut Charles Gerhardt, Ecole Nationale Superieure de Chimie de Montpellier, 34296 Montpellier, France
| | - Raigna A Silva
- Physics Institute, Federal University of Uberlândia, 38400-902 Uberlândia, MG, Brazil
| | - Alexandre Marletta
- Physics Institute, Federal University of Uberlândia, 38400-902 Uberlândia, MG, Brazil
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2
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da Silva SDFC, Foschini M, Tozoni JR, Oliveira ON, Campana PT, Marletta A. Decoupling Temperature–Volume Effects on Poly[2-Methoxy-5-(2′-Ethylhexyloxy)-1,4-Phenylene-Vinylene] Films at the β-Relaxation Temperature. J Phys Chem A 2020; 124:5496-5501. [DOI: 10.1021/acs.jpca.0c04142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Maurício Foschini
- Institute of Physics—Federal University of Uberlândia, CP 593, 38400-902 Uberlândia, MG, Brazil
| | - José Roberto Tozoni
- Institute of Physics—Federal University of Uberlândia, CP 593, 38400-902 Uberlândia, MG, Brazil
| | - Osvaldo N. Oliveira
- Sao Carlos Institute of Physics, University of Sao Paulo, CP 369, 13560-970 São Carlos, SP, Brazil
| | - Patricia Targon Campana
- School of Arts, Sciences and Humanities, University of Sao Paulo, CP 369, 03828-000 São Paulo, SP, Brazil
| | - Alexandre Marletta
- Institute of Physics—Federal University of Uberlândia, CP 593, 38400-902 Uberlândia, MG, Brazil
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3
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Srimath Kandada AR, Silva C. Exciton Polarons in Two-Dimensional Hybrid Metal-Halide Perovskites. J Phys Chem Lett 2020; 11:3173-3184. [PMID: 32191488 DOI: 10.1021/acs.jpclett.9b02342] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
While polarons, charges bound to a lattice deformation induced by electron-phonon coupling, are primary photoexcitations in bulk metal-halide hybrid organic-inorganic perovskites (HOIPs), excitons, Coulomb-bound electron-hole pairs, are the stable quasi-particles in their two-dimensional (2D) analogues. However, are polaronic effects consequential for excitons in 2D-HOIPs? We argue that they are manifested intrinsically in the exciton spectral structure, which is composed of multiple nondegenerate resonances with constant interpeak energy spacing. We highlight population and dephasing dynamics that point to the apparently deterministic role of polaronic effects. We contend that an interplay of long-range and short-range exciton-lattice couplings gives rise to exciton polarons, which fundamentally establishes their effective mass and radius and, consequently, their quantum dynamics. Finally, we highlight opportunities for the community to develop the rigorous description of exciton polarons in 2D-HOIPs to advance their fundamental understanding as model systems for condensed-phase materials with strong lattice-mediated correlations.
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Affiliation(s)
- Ajay Ram Srimath Kandada
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, via Giovanni Pascoli 70/3, 20133 Milano, Italy
- Department of Physics, Wake Forest University, P.O. Box 7507, Winston-Salem, North Carolina 27109, United States
| | - Carlos Silva
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332, United States
- School of Physics, Georgia Institute of Technology, 837 State Street NW, Atlanta, Georgia 30332, United States
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue, Atlanta, Georgia 30332, United States
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4
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Cabero Zabalaga M, Wei J, Yang H, Fan BB, Sun Y, Zhao W. Unraveling the Characteristic Shape for Magnetic Field Effects in Polymer-Fullerene Solar Cells. ACS OMEGA 2017; 2:7777-7783. [PMID: 31457335 PMCID: PMC6645333 DOI: 10.1021/acsomega.7b01470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 10/31/2017] [Indexed: 06/10/2023]
Abstract
Spin-dependent effects in organic solar cells (OSCs) are responsible for tuning the electric current when an external magnetic field is applied. Here, we report the magnetic field effect (MFE) on wide-bandgap (WBG) solar cells based on the polymers PBDT(O)-T1 and PBDT(Se)-T1 blended with PC70BM. Furthermore, we propose an experimental method based on the electrical transport (i-V) measurements to unveil the negative magneto conductance (MC) at small bias. The observed curves in a double-logarithmic scale display a particular S-like shape, independent of the OSC power conversion efficiency (PCE) or MC amplitudes. Additionally, from the slope of the S-like shape curve, it is possible to identify the fullerene concentrations that would result in the minimum MC and the maximum PCE. Our work opens up a door to find more patterns to describe MFE and PCE in polymer-fullerene solar cells, without the application of external magnetic or luminous sources.
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Affiliation(s)
- Marco
Antonio Cabero Zabalaga
- Fert Beijing Institute, BDBC, School of Electronic and Information
Engineering, and Heeger Beijing
Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
| | - Jiaqi Wei
- Fert Beijing Institute, BDBC, School of Electronic and Information
Engineering, and Heeger Beijing
Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
| | - Huaiwen Yang
- Fert Beijing Institute, BDBC, School of Electronic and Information
Engineering, and Heeger Beijing
Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
| | - Bing Bing Fan
- Fert Beijing Institute, BDBC, School of Electronic and Information
Engineering, and Heeger Beijing
Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
| | - Yanming Sun
- Fert Beijing Institute, BDBC, School of Electronic and Information
Engineering, and Heeger Beijing
Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
| | - Weisheng Zhao
- Fert Beijing Institute, BDBC, School of Electronic and Information
Engineering, and Heeger Beijing
Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
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5
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Perevedentsev A, Stavrinou PN, Smith P, Bradley DDC. Solution-crystallization and related phenomena in 9,9-dialkyl-fluorene polymers. II. Influence of side-chain structure. JOURNAL OF POLYMER SCIENCE. PART B, POLYMER PHYSICS 2015; 53:1492-1506. [PMID: 27546983 PMCID: PMC4975719 DOI: 10.1002/polb.23797] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 07/14/2015] [Indexed: 11/22/2022]
Abstract
Solution-crystallization is studied for two polyfluorene polymers possessing different side-chain structures. Thermal analysis and temperature-dependent optical spectroscopy are used to clarify the nature of the crystallization process, while X-ray diffraction and scanning electron microscopy reveal important differences in the resulting microstructures. It is shown that the planar-zigzag chain conformation termed the β-phase, which is observed for certain linear-side-chain polyfluorenes, is necessary for the formation of so-called polymer-solvent compounds for these polymers. Introduction of alternating fluorene repeat units with branched side-chains prevents formation of the β-phase conformation and results in non-solvated, i.e. melt-crystallization-type, polymer crystals. Unlike non-solvated polymer crystals, for which the chain conformation is stabilized by its incorporation into a crystalline lattice, the β-phase conformation is stabilized by complexation with solvent molecules and, therefore, its formation does not require specific inter-chain interactions. The presented results clarify the fundamental differences between the β-phase and other conformational/crystalline forms of polyfluorenes. © 2015 The Authors. Journal of Polymer Science Part B: Polymer Physics published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 1492-1506.
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Affiliation(s)
- Aleksandr Perevedentsev
- Department of Physics and Centre for Plastic Electronics Imperial College London London SW7 2AZ United Kingdom
| | - Paul N Stavrinou
- Department of Physics and Centre for Plastic Electronics Imperial College London London SW7 2AZ United Kingdom
| | - Paul Smith
- Department of Materials Eidgenössische Technische Hochschule (ETH) Zürich Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
| | - Donal D C Bradley
- Department of Physics and Centre for Plastic Electronics Imperial College London London SW7 2AZ United Kingdom
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Liu J, Qu Y, Yang K, Wu Q, Shan Y, Zhang L, Liang Z, Zhang Y. Monodisperse boronate polymeric particles synthesized by a precipitation polymerization strategy: particle formation and glycoprotein response from the standpoint of the Flory-Huggins model. ACS APPLIED MATERIALS & INTERFACES 2014; 6:2059-2066. [PMID: 24422433 DOI: 10.1021/am405144x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The development of a highly specific recognition system for glycoprotein capture from complex biological samples is a prerequisite to the success of mass spectra-based glycoproteomics analysis. To achieve this purpose, a one-pot precipitation polymerization (PP) strategy with a novel solvent system composed of water/ethanol (4:1, v/v) is described for preparing boronate-affinity polymeric micro/nano particles using 4-vinylphenylboronic acid (VPBA) as the functional monomer and N,N'-methylenebis(acrylamide) (MBA) alone or together with divinylbenzene (DVB) as the cross-linker(s). The proposed polymerization strategy not only affords monodisperse polymeric submicrometer particles with a smooth surface and controllable size, ranging from 300 to 700 nm, but also increases the loading capacity of boronic acid, which could hardly be achieved by other polymerization methods, thus leading to the specific recognition of glycoproteins. The effects of solvent systems and monomers on the morphology and boronate-affinity capacity of prepared materials were further investigated based on the Flory-Huggins model. It was proved that the reaction rate of various monomers during particle formation might be the key factor affecting the affinity capacity for glycoproteins. Our results demonstrated that under the theoretical guidance of the Flory-Huggins model the PP strategy with a selected monomer and solvent system might provide a good approach to prepare submicrometer polymer particles with plenty of boronic acid groups on the surface to achieve a highly selective enrichment of glycoproteins.
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Affiliation(s)
- Jianxi Liu
- National Chromatographic R & A Center, Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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8
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Linseis M, Záliš S, Zabel M, Winter RF. Ruthenium Stilbenyl and Diruthenium Distyrylethene Complexes: Aspects of Electron Delocalization and Electrocatalyzed Isomerization of the Z-Isomer. J Am Chem Soc 2012; 134:16671-92. [DOI: 10.1021/ja3059606] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Linseis
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße
31, D-78457 Konstanz, Germany,
- Institut für Anorganische Chemie der Universität Regensburg, D-93040 Regensburg, Germany
| | - Stanislav Záliš
- J. Heyrovský Institute
of Physical Chemistry v.v.i, Academy of Sciences of the Czech Republic, Czech Republic
| | - Manfred Zabel
- Institut für Anorganische Chemie der Universität Regensburg, D-93040 Regensburg, Germany
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße
31, D-78457 Konstanz, Germany,
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9
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Wise AJ, Grey JK. Resonance Raman studies of excited state structural displacements of conjugated polymers in donor/acceptor charge transfer complexes. Phys Chem Chem Phys 2012; 14:11273-6. [DOI: 10.1039/c2cp41748k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Tozoni JR, Guimarães FEG, Atvars TDZ, Nowacki B, Marlleta A, Akcelrud L, Bonagamba TJ. De-aggregation of a polyfluorene derivative in clay nanocomposites: A photophysical study. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Janesko BG. Comparing modern density functionals for conjugated polymer band structures: Screened hybrid, Minnesota, and Rung 3.5 approximations. J Chem Phys 2011; 134:184105. [DOI: 10.1063/1.3589145] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Conwell EM. Photoinduced charge transfer in poly(phenylene-vinylene) and its derivatives. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19971160106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Bartelmess J, Ehli C, Cid JJ, García-Iglesias M, Vázquez P, Torres T, Guldi DM. Tuning and optimizing the intrinsic interactions between phthalocyanine-based PPV oligomers and single-wall carbon nanotubes toward n-type/p-type. Chem Sci 2011. [DOI: 10.1039/c0sc00364f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Brito WH, Silva RA, Miwa RH. Gold adatoms and clusters on PPV: An ab initio investigation. J Chem Phys 2010; 133:204703. [PMID: 21133448 DOI: 10.1063/1.3506771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have performed an ab initio investigation of the energetic, structural, electronic, and vibrational properties of Au atoms and clusters adsorbed on poly-p-phenylene vinylene (PPV) chains, Au(n)/PPV (with n = 1, 2, 6, 7, 10, and 12). We find that the Au(n)/PPV systems are energetically stable by 0.5 eV, compared with the isolated systems, viz., PPV chain and Au(n) clusters, thus supporting the formation of Au(n)/PPV nanocomposites. Further support to the formation of Au(n)/PPV has been provided by examining the vibrational properties of pristine PPV and Au(n)/PPV systems. In agreement with experimental measurements, we find a reduction on the in-plane vibrational frequency of C-C bonds of Au(n)/PPV, when compared with the same vibrational modes of pristine PPV. The electronic properties of isolated Au(n) clusters are modified when adsorbed on PPV. The highest occupied states of Au(n)/PPV are mostly concentrated on the Au(n) cluster, while the lowest unoccupied states are mainly localized along the PPV chain. The HOMO-LUMO energy gap of the Au(n)/PPV systems are smaller than the energy gap of the isolated systems, Au(n) clusters, and pristime PPV chains.
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Affiliation(s)
- W H Brito
- Instituto de Física, Universidade Federal de Uberlândia, C. P. 593, 38400-902 Uberlândia, MG, Brazil
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15
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Shen WW, Ma CN, Wang SF, Xiong HM, Lu HJ, Yang PY. SnO2@Poly(HEMA-co-St-co-VPBA) core-shell nanoparticles designed for selectively enriching glycopeptides followed by MALDI-MS analysis. Chem Asian J 2010; 5:1185-91. [PMID: 20235269 DOI: 10.1002/asia.200900542] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The core-shell boronic-acid functionalized nanoparticles SnO(2)@Poly(HEMA-co-St-co-VPBA) are designed for selectively enriching glycopeptides, followed by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) analysis. Such 60 nm sized core-shell nanoparticles are prepared by means of copolymerization between 2-hydroxyethyl methacrylate (HEMA) grafted on SnO(2) nanoparticles, styrene, and 4-vinylphenylboronic acid (VPBA). All of the synthesis procedures are completed within 3 h. Cyclic boronate esters form between boronic-acid groups on the polymer chains and cis-diol groups on glycopeptides, and thus almost all intact glycopeptides from low-abundant horseradish peroxidase (HRP) and bovine asialofetuin (ASF) are enriched with high selectivity and efficiency. After enrichment, both intact N- and O-glycopeptides are characterized by multistage MS. Furthermore, we successfully apply this method to the human serum sample for characterizing the target glycoproteins haptoglobin and alpha-1-acid-glycoprotein. The present selective enriching method followed by multistage-MS analysis is proven to be a good choice for routine glycopeptide characterization.
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Affiliation(s)
- Wen-Wen Shen
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433 China
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16
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Sariciftci NS, Smilowitz L, Heeger AJ, Wudl F. Photoinduced electron transfer from a conducting polymer to buckminsterfullerene. Science 2010; 258:1474-6. [PMID: 17755110 DOI: 10.1126/science.258.5087.1474] [Citation(s) in RCA: 1615] [Impact Index Per Article: 115.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Evidence for photoinduced electron transfer from the excited state of a conducting polymer onto buckminsterfullerene, C(60), is reported. After photo-excitation of the conjugated polymer with light of energy greater than the pi-pi* gap, an electron transfer to the C(60) molecule is initiated. Photoinduced optical absorption studies demonstrate a different excitation spectrum for the composite as compared to the separate components, consistent with photo-excited charge transfer. A photoinduced electron spin resonance signal exhibits signatures of both the conducting polymer cation and the C(60) anion. Because the photoluminescence in the conducting polymer is quenched by interaction with C(60), the data imply that charge transfer from the excited state occurs on a picosecond time scale. The charge-separated state in composite films is metastable at low temperatures.
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17
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Nantalaksakul A, Krishnamoorthy K, Thayumanavan S. Broadening Absorption in Conductive Polymers through Cross-linkable Side Chains in a Nonconjugated Polymer Backbone. Macromolecules 2009. [DOI: 10.1021/ma901850z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - S. Thayumanavan
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003
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18
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Duncan TV, Park SJ. A New Family of Color-Tunable Light-Emitting Polymers with High Quantum Yields via the Controlled Oxidation of MEH−PPV. J Phys Chem B 2009; 113:13216-21. [DOI: 10.1021/jp907720a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy V. Duncan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - So-Jung Park
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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19
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Cid JJ, Ehli C, Atienza-Castellanos C, Gouloumis A, Maya EM, Vázquez P, Torres T, Guldi DM. Synthesis, photophysical and electrochemical characterization of phthalocyanine-based poly(p-phenylenevinylene) oligomers. Dalton Trans 2009:3955-63. [DOI: 10.1039/b818772j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Sakamoto A, Nakamura O, Tasumi M. Picosecond Time-Resolved Polarized Infrared Spectroscopic Study of Photoexcited States and Their Dynamics in Oriented Poly(p-phenylenevinylene). J Phys Chem B 2008; 112:16437-44. [DOI: 10.1021/jp709641b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Akira Sakamoto
- Materials Science Division, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Osamu Nakamura
- Materials Science Division, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Mitsuo Tasumi
- Materials Science Division, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
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21
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Cheun H, Liu X, Himpsel FJ, Knaapila M, Scherf U, Torkkeli M, Winokur MJ. Polarized Optical Absorption Spectroscopy, NEXAFS, and GIXRD Measurements of Chain Alignment in Polyfluorene Thin Films. Macromolecules 2008. [DOI: 10.1021/ma702579r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H. Cheun
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
| | - X. Liu
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
| | - F. J. Himpsel
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
| | - M. Knaapila
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
| | - U. Scherf
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
| | - M. Torkkeli
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
| | - M. J. Winokur
- Department of Materials Science and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706; MAX-lab, Lund University, SE-22100 Lund, Sweden; Makromolekulare Chemie, Bergische Universität, D-42097, Wuppertal, Germany; and Department of Physics, University of Helsinki, Fl-00014 Helsinki, Finland
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22
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Photo-oxidation in an 18O2 atmosphere: A powerful tool to elucidate the mechanism of UV–visible light oxidation of polymers – Application to the photodegradation of MDMO-PPV. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Sperling J, Nemeth A, Baum P, Šanda F, Riedle E, Kauffmann H, Mukamel S, Milota F. Exciton dynamics in a disordered conjugated polymer: Three-pulse photon-echo and transient grating experiments. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2008.02.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Chen HJ, Wang L, Chiu WY. Preparation of MEH-PPV/nanosized titania hybrids via in situ
sol-gel reaction of titanium alkoxide: Optical property. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.22402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Vannikov AV, Grishina AD, Novikov SV. Electron transport and electroluminescence in polymer layers. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1994v063n02abeh000074] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Holt AL, Leger JM, Carter SA. Electrochemical and optical characterization of p- and n-doped poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]. J Chem Phys 2007; 123:044704. [PMID: 16095381 DOI: 10.1063/1.1949188] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study electrochemical p- and n-type doping in the well-known light-emitting polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV). Doping reactions are characterized using cyclic voltammetry. Optical measurements including photoluminescence and UV/Vis/NIR transmission were performed on doped samples. We find that oxidation in MEH-PPV is a highly reversible reaction resulting in stable freestanding doped films, while the reduced form is unstable and the reaction irreversible. We discuss the dependence of doping reactions on scan rate, film thickness, salt type and concentration, and working electrode type. We observe the development of two additional broad absorption bands in both lightly and heavily doped films accompanied by a slight blueshift in the primary optical transition, suggesting bipolaron band formation. Finally we find that both p and n dopings result in extremely sensitive photoluminescence quenching. We propose a physical model for understanding electrochemical doping in MEH-PPV and the implications this has on the development of such technologies as polymer light-emitting electrochemical cells, electrochromic devices, actuators, and sensors.
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Affiliation(s)
- A L Holt
- Department of Physics, University of California, Santa Cruz, California 95064, USA
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27
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Lee K, Janssen RAJ, Sariciftci NS, Heeger AJ. Infrared Photoexcitation Spectroscopy of Conducting Polymer and C60 Composites: Direct Evidence of Photo-Induced Electron Transfer. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259408039318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kwanghee Lee
- a Institute for Polymers and Organic Solids, University of California at Santa Barbara , Santa Barbara , California , 93106 , U.S.A
| | - R. A. J. Janssen
- a Institute for Polymers and Organic Solids, University of California at Santa Barbara , Santa Barbara , California , 93106 , U.S.A
| | - N. S. Sariciftci
- a Institute for Polymers and Organic Solids, University of California at Santa Barbara , Santa Barbara , California , 93106 , U.S.A
| | - A. J. Heeger
- a Institute for Polymers and Organic Solids, University of California at Santa Barbara , Santa Barbara , California , 93106 , U.S.A
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28
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Shimoi Y, Abe S, Harigaya K. Theory of Optical Absorption in Doped Conjugated Polymers. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259508034012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yukihiro Shimoi
- a Electrotechnical Laboratory , 1-1-4 Umezono, Tsukuba , 305 , Japan
| | - Shuji Abe
- a Electrotechnical Laboratory , 1-1-4 Umezono, Tsukuba , 305 , Japan
| | - Kikuo Harigaya
- a Electrotechnical Laboratory , 1-1-4 Umezono, Tsukuba , 305 , Japan
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29
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Scott JC, Kaufman JH, Salem J, Goitia JA, Brock PJ, Dipietro R. MEH-PPV Light-Emitting Diodes: Mechanisms of Failure. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259608037864] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. C. Scott
- a IBM Research Division , IBM Almaden Research Center , 650 Harry Road, San Jose , CA , 95120-6099
| | - J. H. Kaufman
- a IBM Research Division , IBM Almaden Research Center , 650 Harry Road, San Jose , CA , 95120-6099
| | - J. Salem
- a IBM Research Division , IBM Almaden Research Center , 650 Harry Road, San Jose , CA , 95120-6099
| | - J. A. Goitia
- a IBM Research Division , IBM Almaden Research Center , 650 Harry Road, San Jose , CA , 95120-6099
| | - P. J. Brock
- a IBM Research Division , IBM Almaden Research Center , 650 Harry Road, San Jose , CA , 95120-6099
| | - R. Dipietro
- a IBM Research Division , IBM Almaden Research Center , 650 Harry Road, San Jose , CA , 95120-6099
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30
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Aging of a donor conjugated polymer: Photochemical studies of the degradation of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene]. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21815] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Omerzu A, Licer M, Mertelj T, Kabanov VV, Mihailovic D. Hole interactions with molecular vibrations on DNA. PHYSICAL REVIEW LETTERS 2004; 93:218101. [PMID: 15601065 DOI: 10.1103/physrevlett.93.218101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2004] [Indexed: 05/24/2023]
Abstract
We report on a study of the interactions between holes and molecular vibrations on dry DNA using photoinduced infrared absorption spectroscopy. Laser photoexcited holes are found to have a room-temperature lifetime in excess of tau > 1 ms, clearly indicating the presence of localization. However, from a quantitative model analysis of the frequency shifts of vibrational modes caused by the holes, we find the hole-vibrational coupling constant to be relatively small, lambda approximately 0.2. This interaction leads to a change in the conformational energy of DeltaE0 approximately 0.015 eV, which is too small to cause self-trapping at room temperature. We conclude that, at least in the dry (A) form, DNA is best understood in terms of a double chain of coupled quantum dots arising from the pseudorandom chain sequence of base pairs, in which Anderson localization prevents the formation of a metallic state.
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Affiliation(s)
- Ales Omerzu
- Department of Complex Matter, Institute Jozef Stefan, Jamova 39, 1000 Ljubljana, Slovenia
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32
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Masuo S, Yoshikawa H, Asahi T, Masuhara H, Sato T, Jiang DL, Aida T. Repetitive Contraction and Swelling Behavior of Gel-like Wire-type Dendrimer Assemblies in Solution Layer by Photon Pressure of a Focused Near-infrared Laser Beam. J Phys Chem B 2002. [DOI: 10.1021/jp013367e] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Miller E, Brabec CJ, Neugebauer H, Heeger AJ, Serdar Sariciftci N. Polarized doping-induced infrared absorption in highly oriented conjugated polymers. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00008-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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Brabec CJ, Cravino A, Zerza G, Sariciftci NS, Kiebooms R, Vanderzande D, Hummelen JC. Photoactive Blends of Poly(para-phenylenevinylene) (PPV) with Methanofullerenes from a Novel Precursor: Photophysics and Device Performance. J Phys Chem B 2001. [DOI: 10.1021/jp003407z] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | - J. C. Hummelen
- Stratingh Institute and Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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35
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36
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Baı̈toul M, Wéry J, Buisson JP, Arbuckle G, Shah H, Lefrant S, Hamdoume M. In situ resonant Raman and optical investigations of p-doped poly (p-phenylene vinylene). POLYMER 2000. [DOI: 10.1016/s0032-3861(00)00022-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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37
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Sakamoto A, Nakamura O, Yoshimoto G, Tasumi M. Picosecond Time-Resolved Infrared Absorption Studies on the Photoexcited States of Poly(p-phenylenevinylene). J Phys Chem A 2000. [DOI: 10.1021/jp9927597] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akira Sakamoto
- Department of Chemistry, Faculty of Science, Saitama University, Urawa, Saitama 338-8570, Japan
| | - Osamu Nakamura
- Department of Chemistry, Faculty of Science, Saitama University, Urawa, Saitama 338-8570, Japan
| | - Goh Yoshimoto
- Department of Chemistry, Faculty of Science, Saitama University, Urawa, Saitama 338-8570, Japan
| | - Mitsuo Tasumi
- Department of Chemistry, Faculty of Science, Saitama University, Urawa, Saitama 338-8570, Japan
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38
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Cerullo G, Lanzani G, Pallaro L, De Silvestri S. Femtosecond impulsive vibrational spectroscopy in conjugated polymers. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(99)00441-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Phase–modulation measurements of photoinduced infrared absorptions from poly(p-phenylene) and poly(2,5-dioctyloxy-p-phenylenevinylene). J Mol Struct 2000. [DOI: 10.1016/s0022-2860(99)00436-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Burrows HD, Miguel MDG, Monkman AP, Horsburgh LE, Hamblett I, Navaratnam S. Pulse radiolysis studies on charge carriers in conjugated polymers. J Chem Phys 2000. [DOI: 10.1063/1.480883] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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41
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42
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Brabec CJ, Dyakonov V, Sariciftci NS, Graupner W, Leising G, Hummelen JC. Investigation of photoexcitations of conjugated polymer/fullerene composites embedded in conventional polymers. J Chem Phys 1998. [DOI: 10.1063/1.476664] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Förner W, Bogar F, Knab R. Energy bands and bond alternation potential in poly(para-phenylene vinylene): a comparative ab initio quantum chemical and density functional theory study. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0166-1280(98)90219-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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44
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Kirk Miller E, Lee K, Hasharoni K, Hummelen JC, Wudl F, Heeger AJ. Photo-induced changes in the complex index of refraction in conjugated polymer/fullerene blends. J Chem Phys 1998. [DOI: 10.1063/1.475550] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Sakamoto A, Furukawa Y, Tasumi M. Spectroscopic Studies on the Radical-Cation Dimer of a Model Compound of Poly(p-phenylenevinylene). Similarities between the Dimer and the State of Positive Polarons in the Sulfuric-Acid-Treated Polymer. J Phys Chem B 1997. [DOI: 10.1021/jp9619649] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akira Sakamoto
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
| | - Yukio Furukawa
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
| | - Mitsuo Tasumi
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
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46
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Furukawa Y. Electronic Absorption and Vibrational Spectroscopies of Conjugated Conducting Polymers. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960608n] [Citation(s) in RCA: 282] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yukio Furukawa
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
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47
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Sarkas HW, Kwan W, Flom SR, Merritt CD, Kafafi ZH. Enhanced Photooxidative Stability of Conjugated Polymers via C60 Doping. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960322i] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H. W. Sarkas
- Optical Physics Branch, US Naval Research Laboratory, Washington, D.C. 20375
| | - W. Kwan
- Optical Physics Branch, US Naval Research Laboratory, Washington, D.C. 20375
| | - S. R. Flom
- Optical Physics Branch, US Naval Research Laboratory, Washington, D.C. 20375
| | - C. D. Merritt
- Optical Physics Branch, US Naval Research Laboratory, Washington, D.C. 20375
| | - Z. H. Kafafi
- Optical Physics Branch, US Naval Research Laboratory, Washington, D.C. 20375
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48
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Mathy A, Ueberhofen K, Schenk R, Gregorius H, Garay R, Müllen K, Bubeck C. Third-harmonic-generation spectroscopy of poly(p-phenylenevinylene): A comparison with oligomers and scaling laws for conjugated polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:4367-4376. [PMID: 9983989 DOI: 10.1103/physrevb.53.4367] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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49
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Wei X, Vardeny ZV, Sariciftci NS, Heeger AJ. Absorption-detected magnetic-resonance studies of photoexcitations in conjugated-polymer/C60 composites. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:2187-2190. [PMID: 9983706 DOI: 10.1103/physrevb.53.2187] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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50
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Cornil J, Beljonne D, Brédas JL. Nature of optical transitions in conjugated oligomers. I. Theoretical characterization of neutral and doped oligo(phenylenevinylene)s. J Chem Phys 1995. [DOI: 10.1063/1.470116] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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