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Keheze FM, Raithel D, Wu T, Schiefer D, Sommer M, Hildner R, Reiter G. Signatures of Melting and Recrystallization of a Bulky Substituted Poly(thiophene) Identified by Optical Spectroscopy. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01080] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Fanuel M. Keheze
- Physikalisches
Institut, Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Dominic Raithel
- Experimentalphysik
IV, University of Bayreuth, 95440 Bayreuth, Germany
| | - Tianyu Wu
- Physikalisches
Institut, Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Daniel Schiefer
- Institut
für Makromolekulare Chemie, Universität Freiburg, Stefan-Meier-Straße
31, 79104 Freiburg, Germany
| | - Michael Sommer
- Institut
für Makromolekulare Chemie, Universität Freiburg, Stefan-Meier-Straße
31, 79104 Freiburg, Germany
- Freiburger Materialforschungszentrum
FMF, Stefan-Meier-Straße 21, 79104 Freiburg, Germany
- Freiburger Institut
für interaktive Materialien und bioinspirierte Technologien
FIT, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
- Polymerchemie, Technische Universität Chemnitz, Strasse der
Nationen 62, 09111 Chemnitz, Germany
| | - Richard Hildner
- Experimentalphysik
IV, University of Bayreuth, 95440 Bayreuth, Germany
| | - Günter Reiter
- Physikalisches
Institut, Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
- Freiburger Materialforschungszentrum
FMF, Stefan-Meier-Straße 21, 79104 Freiburg, Germany
- Freiburger Institut
für interaktive Materialien und bioinspirierte Technologien
FIT, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
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Panzer F, Bässler H, Lohwasser R, Thelakkat M, Köhler A. The Impact of Polydispersity and Molecular Weight on the Order-Disorder Transition in Poly(3-hexylthiophene). J Phys Chem Lett 2014; 5:2742-2747. [PMID: 26277973 DOI: 10.1021/jz5009938] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Conjugated poly(3-hexylthiophene) (P3HT) chains are known to exist at least in two distinct conformations: a coiled phase and a better ordered aggregated phase. Employing steady state absorption and fluorescence spectroscopy, we measure the course of aggregation of P3HT in tetrahydrofuran (THF) solution within a temperature range of 300 K to 170 K. We show that aggregation is a temperature controlled process, driven by a thermodynamic order-disorder transition. The transition temperature increases with the molecular weight of the chains and can be rationalized in the theory of Sanchez. This implies a smearing out of the phase transition in samples with increasing polydispersity and erodes the signature of a first order phase transition. The detection of a hysteresis when undergoing cooling/heating cycles further substantiates this reasoning.
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Affiliation(s)
- Fabian Panzer
- †Experimental Physics II, ‡Bayreuth Institute of Macromolecular Science, and §Applied Functional Polymers, Macromolecular Chemistry 1, University of Bayreuth, 95540 Bayreuth, Germany
| | - Heinz Bässler
- †Experimental Physics II, ‡Bayreuth Institute of Macromolecular Science, and §Applied Functional Polymers, Macromolecular Chemistry 1, University of Bayreuth, 95540 Bayreuth, Germany
| | - Ruth Lohwasser
- †Experimental Physics II, ‡Bayreuth Institute of Macromolecular Science, and §Applied Functional Polymers, Macromolecular Chemistry 1, University of Bayreuth, 95540 Bayreuth, Germany
| | - Mukundan Thelakkat
- †Experimental Physics II, ‡Bayreuth Institute of Macromolecular Science, and §Applied Functional Polymers, Macromolecular Chemistry 1, University of Bayreuth, 95540 Bayreuth, Germany
| | - Anna Köhler
- †Experimental Physics II, ‡Bayreuth Institute of Macromolecular Science, and §Applied Functional Polymers, Macromolecular Chemistry 1, University of Bayreuth, 95540 Bayreuth, Germany
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Köhler A, Hoffmann ST, Bässler H. An Order–Disorder Transition in the Conjugated Polymer MEH-PPV. J Am Chem Soc 2012; 134:11594-601. [DOI: 10.1021/ja302408a] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Köhler
- Organic Semiconductors, Experimental Physics II, Department
of Physics and Bayreuth Institute of Macromolecular Science(BIMF), University of Bayreuth, Bayreuth 95440, Germany
| | - Sebastian T. Hoffmann
- Organic Semiconductors, Experimental Physics II, Department
of Physics and Bayreuth Institute of Macromolecular Science(BIMF), University of Bayreuth, Bayreuth 95440, Germany
| | - Heinz Bässler
- Organic Semiconductors, Experimental Physics II, Department
of Physics and Bayreuth Institute of Macromolecular Science(BIMF), University of Bayreuth, Bayreuth 95440, Germany
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4
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Ishihara Y, Kimura S. Peptide nanotube composed of cyclic tetra-β-peptide having polydiacetylene. Biopolymers 2012; 98:155-60. [DOI: 10.1002/bip.22029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 01/19/2012] [Accepted: 01/26/2012] [Indexed: 12/19/2022]
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Bässler H. Charge transport in polymers studied by combining optical and electrical techniques. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19900370103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Sasaki DY, Carpick RW, Burns AR. High Molecular Orientation in Mono- and Trilayer Polydiacetylene Films Imaged by Atomic Force Microscopy. J Colloid Interface Sci 2000; 229:490-496. [PMID: 10985828 DOI: 10.1006/jcis.2000.7043] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Atomically flat monolayer and trilayer films of polydiacetylenes have been prepared on mica and silicon using a horizontal deposition technique from a pure water subphase. Langmuir films of 10,12-pentacosadiynoic acid (I) and N-(2-ethanol)-10,12-pentacosadiynamide (II) were compressed to 20 mN/m and subsequently polymerized by UV irradiation at the air-water interface. Blue and red forms of the films were prepared by varying exposure times and incident power. Polymerization to the blue-phase films produced slight contractions of 2 and 5% for the films of II and I, respectively. Longer UV exposures yielded red-phase films with dramatic film contraction of 15 and 32% for II and I, respectively. The horizontal deposition technique provided transfer ratios of unity with minimal film stress or structure modification. Atomic force microscopy images revealed nearly complete coverage of the substrate with atomically flat films. Crystalline domains of up to 100 micrometers of highly oriented polydiacetylene molecules were observed. The results reported herein provide insight into the roles of molecular packing and chain orientations in converting the monomeric film to the polymerized blue and red phases. Copyright 2000 Academic Press.
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Affiliation(s)
- DY Sasaki
- Biomolecular Materials and Interface Science Department, Sandia National Laboratories, Albuquerque, New Mexico, 87185-1413
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7
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Morgan J, Rumbles G, Crystall B, Smith T, Bloor D. Photophysics of the chiral soluble polydiacetylene poly (9RMBU). Evidence for emission from short conjugated sequences. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)85720-u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rauscher U, Bässler H, Bradley DD, Hennecke M. Exciton versus band description of the absorption and luminescence spectra in poly(p-phenylenevinylene). PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:9830-9836. [PMID: 9995234 DOI: 10.1103/physrevb.42.9830] [Citation(s) in RCA: 216] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tomioka Y, Imazeki S, Tanaka N. Highly oriented polydiacetylene monolayer formed at the air—water interface. Chem Phys Lett 1990. [DOI: 10.1016/s0009-2614(90)87175-q] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Pautmeier L, Rauscher U, Bässler H. Spectral diffusion in 1 D systems: Simulation and experimental results for matrix-isolated polydiacetylene and poly-isopropenylnaphthalene. Chem Phys 1990. [DOI: 10.1016/0301-0104(90)80050-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Rauscher U, Bässler H, Taylor R. Site-selective fluorescence spectroscopy of a matrix-isolated poly-octylmethylsilane. Chem Phys Lett 1989. [DOI: 10.1016/0009-2614(89)85079-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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