1
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Gust D, Scholz M, Schumacher V, Mulatier JC, Pitrat D, Guy L, Oum K, Lenzer T. Annealing temperature-dependent induced supramolecular chiroptical response of copolymer thin films studied by pump-modulated transient circular dichroism spectroscopy. Sci Rep 2024; 14:12694. [PMID: 38830981 PMCID: PMC11148131 DOI: 10.1038/s41598-024-63126-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 05/22/2024] [Indexed: 06/05/2024] Open
Abstract
Copolymer thin films showing induced supramolecular chirality are of considerable interest for optoelectronic applications such as organic light-emitting diodes. Here, we introduce a new helicene-like chiral additive with two octyloxy substituents which displays excellent chiral induction properties in an achiral polyfluorene copolymer, leading to a circular dichroism (CD) response of up to 10,000 mdeg. This chiral inducer also displays very good thermal stability, which enables us to perform an extended study on the induced chiroptical properties of the cholesteric copolymer thin films annealed at different temperatures in the range 140-260 °C. Starting from about 180 °C, a distinct change in the morphology of the CD-active film is observed by CD microscopy, from micrometre-size granular to extended CD-active regions, where the latter ones display skewed distributions of the dissymmetry parameter gabs. Broadband Müller matrix spectroscopy finds a pronounced CD and circular birefringence (CB) response and only weak linear dichroism (LD, LD') and linear birefringence (LB, LB'). Ultrafast transient CD spectroscopy with randomly polarised excitation reveals a clean mirror-image-type transient response, which shows a second-order decay of the S1 population due to singlet-singlet annihilation processes.
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Affiliation(s)
- Domenic Gust
- Faculty IV: School of Science and Technology, Department Chemistry and Biology, Physical Chemistry 2, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Mirko Scholz
- Faculty IV: School of Science and Technology, Department Chemistry and Biology, Physical Chemistry 2, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Vivien Schumacher
- Faculty IV: School of Science and Technology, Department Chemistry and Biology, Physical Chemistry 2, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany
| | - Jean-Christophe Mulatier
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, Université Claude Bernard Lyon 1, 69342, Lyon, France
| | - Delphine Pitrat
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, Université Claude Bernard Lyon 1, 69342, Lyon, France
| | - Laure Guy
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, Université Claude Bernard Lyon 1, 69342, Lyon, France
| | - Kawon Oum
- Faculty IV: School of Science and Technology, Department Chemistry and Biology, Physical Chemistry 2, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany.
| | - Thomas Lenzer
- Faculty IV: School of Science and Technology, Department Chemistry and Biology, Physical Chemistry 2, University of Siegen, Adolf-Reichwein-Str. 2, 57068, Siegen, Germany.
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2
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Joseph JP, Malone T, Abraham SR, Dutta A, Gupta S, Kuzmin A, Baev A, Swihart MT, Hendrickson JR, Prasad PN. Plasticizer-Induced Enhancement of Mesoscale Dissymmetry in Thin Films of Chiral Polymers with Variable Chain Length. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305684. [PMID: 37725635 DOI: 10.1002/adma.202305684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/13/2023] [Indexed: 09/21/2023]
Abstract
Conjugated polymers with chiral side chains are of interest in areas including chiral photonics, optoelectronics, and chemical and biological sensing. However, the low dissymmetry factors of most neat polymer thin films have limited their practical application. Here, a robust method to increase the absorption dissymmetry factor in a poly-fluorene-thiophene (PF8TS series) system is demonstrated by varying molecular weight and introducing an achiral plasticizer, polyethylene mono alcohol (PEM-OH). Extending chain length within the optimal range and adding this long-chain alcohol significantly enhance the chiroptical properties of spin-coated and annealed thin films. Mueller matrix spectroscopic ellipsometry (MMSE) analysis shows good agreement with the steady-state transmission measurements confirming a strong chiral response (circular dichroism (CD) and circular birefringence (CB)), ruling out linear dichroism, birefringence, and specific reflection effects. Solid-state NMR studies of annealed hybrid chiral polymer systems show enhancement of signals associated with aromatic π-stacked backbone and the ordered side-chain conformations. Further studies using Raman spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), atomic force microscopy (AFM), and polarized optical microscopy (POM) indicate that PEM-OH facilitates mesoscopic crystal domain ordering upon annealing. This provides new insights into routes for tuning optical activity in conjugated polymers.
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Affiliation(s)
- Jojo P Joseph
- Department of Chemistry and The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Trent Malone
- Department of Electro-Optics and Photonics, University of Dayton, Dayton, OH, 45469, USA
- Air Force Research Laboratory, Sensors Directorate, Wright-Patterson AFB, Dayton, OH, 45433, USA
| | - Shema R Abraham
- Department of Chemical and Biological Engineering, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Avisek Dutta
- Department of Chemistry and The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Sonal Gupta
- Department of Chemistry and The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Andrey Kuzmin
- Department of Chemistry and The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Alexander Baev
- Department of Chemistry and The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Mark T Swihart
- Department of Chemical and Biological Engineering, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Joshua R Hendrickson
- Air Force Research Laboratory, Sensors Directorate, Wright-Patterson AFB, Dayton, OH, 45433, USA
| | - Paras N Prasad
- Department of Chemistry and The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
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3
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Joseph JP, Miglani C, Maulik A, Abraham SR, Dutta A, Baev A, Prasad PN, Pal A. Stereoselective Plasmonic Interaction in Peptide-tethered Photopolymerizable Diacetylenes Doped with Chiral Gold Nanoparticles. Angew Chem Int Ed Engl 2023; 62:e202306751. [PMID: 37483166 DOI: 10.1002/anie.202306751] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/16/2023] [Accepted: 07/21/2023] [Indexed: 07/25/2023]
Abstract
Designing polymeric systems with ultra-high optical activity is instrumental in the pursuit of smart artificial chiroptical materials, including the fundamental understanding of structure/property relations. Herein, we report a diacetylene (DA) moiety flanked by chiral D- and L-FF dipeptide methyl esters that exhibits efficient topochemical photopolymerization in the solid phase to furnish polydiacetylene (PDA) with desired control over the chiroptical properties. The doping of the achiral gold nanoparticles provides plasmonic interaction with the PDAs to render asymmetric shape to the circular dichroism bands. With the judicious design of the chiral amino acid ligand appended to the AuNPs, we demonstrate the first example of selective chiral amplification mediated by stereo-structural matching of the polymer-plasmonic AuNP hybrid pairs. Such ordered self-assembly aided by topochemical polymerization in peptide-tethered PDA provides a smart strategy to produce soft responsive materials for applications in chiral photonics.
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Affiliation(s)
- Jojo P Joseph
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), 14260, Buffalo, NY, USA
| | - Chirag Miglani
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, 140306, Mohali, Punjab, India
| | - Antarlina Maulik
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, 140306, Mohali, Punjab, India
| | - Shema R Abraham
- Department of Chemical and Biological Engineering, University at Buffalo (SUNY), 14260, Buffalo, NY, USA
| | - Avisek Dutta
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), 14260, Buffalo, NY, USA
| | - Alexander Baev
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), 14260, Buffalo, NY, USA
| | - Paras N Prasad
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), 14260, Buffalo, NY, USA
| | - Asish Pal
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, 140306, Mohali, Punjab, India
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4
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Van Oosten A, Verduyckt C, De Winter J, Gerbaux P, Koeckelberghs G. Influence of the dispersity and molar mass distribution of conjugated polymers on the aggregation type and subsequent chiral expression. SOFT MATTER 2023; 19:3794-3802. [PMID: 37191181 DOI: 10.1039/d3sm00163f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
This study aims to determine the influence of the dispersity on the aggregation of conjugated polymers and their subsequent chiral expression. Dispersity has been thoroughly investigated for industrial polymerizations, but research on conjugated polymers is lacking. Nonetheless, knowledge thereof is crucial for controlling the aggregation type (type I versus type II) and its influence is therefore investigated. For that purpose, a series of polymers is synthesized via metered initiator addition, resulting in dispersities ranging from 1.18-1.56. The lower dispersity polymers yield type II aggregates and the resulting symmetrical electronic circular dichroism (ECD) spectra while the higher dispersity polymers are predominantly type I due to the longer chains effectively acting as a seed and therefore yield asymmetrical ECD spectra. Furthermore, a monomodal and bimodal molar mass distribution of similar dispersity are compared, demonstrating that bimodal distributions show both aggregation types and therefore more disorder, leading to a decrease in chiral expression.
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Affiliation(s)
- Annelien Van Oosten
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium.
| | - Cynthia Verduyckt
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium.
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP) - University of Mons (UMONS), Place du Parc 23, B-7000 Mons, Belgium
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP) - University of Mons (UMONS), Place du Parc 23, B-7000 Mons, Belgium
| | - Guy Koeckelberghs
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium.
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5
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Joseph JP, Abraham SR, Dutta A, Baev A, Swihart MT, Prasad PN. Modulating the Chiroptical Response of Chiral Polymers with Extended Conjugation within the Structural Building Blocks. J Phys Chem Lett 2022; 13:9085-9095. [PMID: 36154023 DOI: 10.1021/acs.jpclett.2c02498] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Advancing the emerging area of chiral photonics requires modeling-guided concepts of chiral material design to enhance optical activity and associated optical rotatory dispersion. Herein, we introduce conformational engineering achieved by tuning polymer backbone conjugation through introduction of thiophene structural units in a chiral fluorene polymer backbone. Our theoretical calculations reveal a relationship between the structural conformation and the resultant rotational strength. We further synthesize a series of chiral fluorene-based polymers copolymerized with thiophene whose optical chirality trend is in qualitative agreement with predictions of our quantum chemical calculations. Varying the number of thiophene units in the monomer building block allows us to modulate the rotational strength by tuning the intrafibril helicity of single-stranded polymer chains, whereby the monomer conjugation is retained throughout the whole length of the polymer backbone. Our design concept delineates an underexamined approach: the concept of tuning backbone conjugation and helicity within the main chain to enhance the optical activity of chiral polymer systems.
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Affiliation(s)
- Jojo P Joseph
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), Buffalo, New York 14260, United States
| | - Shema R Abraham
- Department of Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, New York 14260, United States
| | - Avisek Dutta
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), Buffalo, New York 14260, United States
| | - Alexander Baev
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), Buffalo, New York 14260, United States
| | - Mark T Swihart
- Department of Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, New York 14260, United States
| | - Paras N Prasad
- Department of Chemistry and The Institute for Lasers, Photonics and Biophotonics, University at Buffalo (SUNY), Buffalo, New York 14260, United States
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6
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Timmermans B, de Coene Y, Van Oosten A, Clays K, Verbiest T, Koeckelberghs G. Influence of the Irregularity of the Molecular Structure on the Chiral Expression of Poly(fluorene)s. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00234] [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)
- Birgitt Timmermans
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Yovan de Coene
- Laboratory for Molecular Electronics and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, B-3001 Heverlee, Belgium
| | - Annelien Van Oosten
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Koen Clays
- Laboratory for Molecular Electronics and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, B-3001 Heverlee, Belgium
| | - Thierry Verbiest
- Laboratory for Molecular Electronics and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, B-3001 Heverlee, Belgium
| | - Guy Koeckelberghs
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
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7
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Toledo LFRB, Turchetti DA, Glislere AP, Nowacki B, Basílio FC, Marletta A, Kowalski EL, Akcelrud L. Correlation of electronic and vibrational properties with the chiro-optical activity of polyfluorene copolymers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 276:121180. [PMID: 35397447 DOI: 10.1016/j.saa.2022.121180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 03/11/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
The rationale of this paper is to shed some light on the origin of the optical response of two similar chiral fluorene copolymers in correlation with their vibrational modes, to understand how a chiral center placed in a ramification affects the optical properties of the main chain. Various spectroscopic ellipsometric techniques, in the scope of the Stokes theory were used to characterize the optical-vibrational behavior of the polyfluorenes: ellipsometry in emission (EE), transmission (TE), and Raman (ERS). The results showed that the optical activity and the emission of the circularly polarized light depends substantially on the interaction of the chiral carbon in the ramification and the main chain through specific optically active vibrational modes, for each sample. One interesting achievement was to find the absolute dextrorotatory configuration of the studied molecules, that could induce a helicoidal structure to the entire material.
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Affiliation(s)
- Luiz F R B Toledo
- Electrical and Material Department, LACTEC Institutes, 81531-980 Curitiba, Parana, Brazil; Integrated Graduate Program in Engineering - PIPE, Federal University of Parana, Curitiba, Brazil
| | - Denis A Turchetti
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, 81531-990 Curitiba, Parana, Brazil
| | - Ana P Glislere
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, 81531-990 Curitiba, Parana, Brazil
| | - Bruno Nowacki
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, 81531-990 Curitiba, Parana, Brazil
| | - Fernando C Basílio
- Institute of Physics, Federal University of Uberlandia, 38400-902 Uberlandia, Minas Gerais, Brazil
| | - Alexandre Marletta
- Institute of Physics, Federal University of Uberlandia, 38400-902 Uberlandia, Minas Gerais, Brazil
| | - Edemir L Kowalski
- Electrical and Material Department, LACTEC Institutes, 81531-980 Curitiba, Parana, Brazil
| | - Leni Akcelrud
- Integrated Graduate Program in Engineering - PIPE, Federal University of Parana, Curitiba, Brazil; Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, 81531-990 Curitiba, Parana, Brazil.
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8
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Santana AJ, Turchetti DA, Zanlorenzi C, dos Santos JCR, Oliveira AJA, Akcelrud L. Magnetic Properties of a Polyfluorene Derivative Metallopolymer Containing Neodymium Ions. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alisson J. Santana
- Paulo Scarpa Polymer Laboratory (LaPPS) Federal University of Parana POB 19081 Curitiba Parana 81531‐990 Brazil
| | - Denis A. Turchetti
- Paulo Scarpa Polymer Laboratory (LaPPS) Federal University of Parana POB 19081 Curitiba Parana 81531‐990 Brazil
| | - Cristiano Zanlorenzi
- Paulo Scarpa Polymer Laboratory (LaPPS) Federal University of Parana POB 19081 Curitiba Parana 81531‐990 Brazil
| | - José C. R. dos Santos
- Physics Department Federal University of Sao Carlos POB 676 São Carlos SP 13565‐905 Brazil
| | | | - Leni Akcelrud
- Paulo Scarpa Polymer Laboratory (LaPPS) Federal University of Parana POB 19081 Curitiba Parana 81531‐990 Brazil
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9
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Maity S, Bedi A, Patil S. Side‐chain induced chirality in diketopyrrolopyrrole based polymers. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Soham Maity
- Department of Chemistry Michigan State University East Lansing Michigan USA
| | - Anjan Bedi
- Department of Chemistry SRM Institute of Science and Technology Chennai India
| | - Satish Patil
- Solid State and Structural Chemistry Unit Indian Institute of Science Bangalore India
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10
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Glislere AP, Turchetti D, Nowacki B, Zanlorenzi C, Akcelrud L. Blending as a Strategy to Attain Chiro-Optically Activity Polymers. Macromol Rapid Commun 2021; 42:e2100075. [PMID: 33939864 DOI: 10.1002/marc.202100075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/30/2021] [Indexed: 11/11/2022]
Abstract
Two copolymers, one containing a chiral center and another without any asymmetric site are studied regarding their chiro-optical properties. The pure polymers do not show any signal of chiro-optical activity, only a smooth line is observed in the circular dichroism spectra, even for the chiral material. However, blends containing the achiral one as a major component show striking chiro-optical activity, originating by stable supramolecular structures whose size and shape remain unchanged, regardless of the blend composition. Only the number of such structures (composed by the chiral one), vary with blend composition. The results suggest that working with supramolecular morphology can be an important strategy to attain chiro-optical active polymers.
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Affiliation(s)
- Ana Paula Glislere
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, Curitiba, Parana, 81531-990, Brazil
| | - Denis Turchetti
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, Curitiba, Parana, 81531-990, Brazil
| | - Bruno Nowacki
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, Curitiba, Parana, 81531-990, Brazil
| | - Cristiano Zanlorenzi
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, Curitiba, Parana, 81531-990, Brazil
| | - Leni Akcelrud
- Chemistry Department, Paulo Scarpa Polymer Laboratory (LaPPS), Federal University of Parana, Curitiba, Parana, 81531-990, Brazil
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11
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Wu B, Wu H, Zhou Y, Zheng D, Jia X, Fang L, Zhu L. Controlling Ultra-Large Optical Asymmetry in Amorphous Molecular Aggregations. Angew Chem Int Ed Engl 2021; 60:3672-3678. [PMID: 33119201 DOI: 10.1002/anie.202012224] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/19/2020] [Indexed: 11/10/2022]
Abstract
Although ultra-large optical asymmetry appears in crystalline materials, distractions from the mesoscopic ordering often causes inauthenticity in chiropticity. In amorphous materials, however, it remains challenging and elusive to achieve large chiropticity. Herein, we report the quantitative control of chiral amplification, on amorphous supramolecular structures of cholesteryl-linked bis(dipyrrinato)zinc(II), to an exceptionally high level. A proper chiral packing of the building block at several molecular scale considerably contributes to the absorptive dissymmetry factor gabs , although the system is overall disordered. The intense and tunable aggregation strength renders a variable gabs value up to +0.10 and +0.31 in the solution and in film state. On this basis, a superior ON-OFF switching of chiropticity is realized under external stimuli. This work establishes a general design principle to control over ultra-large optical asymmetry on a wider scope of chiral materials.
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Affiliation(s)
- Bin Wu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Hongwei Wu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Yunyun Zhou
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Dongxiao Zheng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Xiaoyong Jia
- Henan Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, China
| | - Lei Fang
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, TX, 77843, USA
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
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12
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Wu B, Wu H, Zhou Y, Zheng D, Jia X, Fang L, Zhu L. Controlling Ultra‐Large Optical Asymmetry in Amorphous Molecular Aggregations. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012224] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bin Wu
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Hongwei Wu
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China
| | - Yunyun Zhou
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Dongxiao Zheng
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Xiaoyong Jia
- Henan Key Laboratory of Photovoltaic Materials Henan University Kaifeng 475004 China
| | - Lei Fang
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77843 USA
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
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13
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Albano G, Pescitelli G, Di Bari L. Chiroptical Properties in Thin Films of π-Conjugated Systems. Chem Rev 2020; 120:10145-10243. [PMID: 32892619 DOI: 10.1021/acs.chemrev.0c00195] [Citation(s) in RCA: 251] [Impact Index Per Article: 62.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chiral π-conjugated molecules provide new materials with outstanding features for current and perspective applications, especially in the field of optoelectronic devices. In thin films, processes such as charge conduction, light absorption, and emission are governed not only by the structure of the individual molecules but also by their supramolecular structures and intermolecular interactions to a large extent. Electronic circular dichroism, ECD, and its emission counterpart, circularly polarized luminescence, CPL, provide tools for studying aggregated states and the key properties to be sought for designing innovative devices. In this review, we shall present a comprehensive coverage of chiroptical properties measured on thin films of organic π-conjugated molecules. In the first part, we shall discuss some general concepts of ECD, CPL, and other chiroptical spectroscopies, with a focus on their applications to thin film samples. In the following, we will overview the existing literature on chiral π-conjugated systems whose thin films have been characterized by ECD and/or CPL, as well other chiroptical spectroscopies. Special emphasis will be put on systems with large dissymmetry factors (gabs and glum) and on the application of ECD and CPL to derive structural information on aggregated states.
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Affiliation(s)
- Gianluigi Albano
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
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14
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Farooq MA, Wei W, Xiong H. Chiral Photonic Liquid Crystalline Polyethers with Widely Tunable Helical Superstructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3072-3079. [PMID: 32167775 DOI: 10.1021/acs.langmuir.0c00304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Liquid crystalline polymers with tunable structures on the scale of visible wavelength are important in optical technology due to their enhanced mechanical stability, processability, and structural integrity. Herein, we report a series of cholesteric liquid crystalline (CLC) polyethers with a widely tunable pitch length and a broad CLC phase window through a bottom-up structural design. The well-defined multicomponent polyethers were successfully synthesized by utilizing monomer-activated anionic ring-opening polymerization. Through adjustment of the composition of chiral cholesteryl (Ch) and photochromic azobenzene (Az) mesogenic moieties, rich phase behaviors have been discovered, and a phase boundary diagram was constructed consequently, wherein cholesteric helical superstructures in a broad composition range and temperature window straight down to the glassy state at room temperature were achieved. Particularly, the planar oriented helical superstructures can exhibit widely tunable and switchable reflections over the entire visible range across red, green, and blue colors through temperature and light control, which are closely related to the extraordinary flexibility of the polyether backbone. Their thermo-light dual-responsive properties provide an alternative opportunity to fabricate smart and switchable polymeric LC materials for optical applications.
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Timmermans B, Koeckelberghs G. Chiral expression of co-crystallizing poly(thiophene)- block-poly(selenophene) copolymers. Polym Chem 2020. [DOI: 10.1039/c9py01775e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this research, the chiral expression of co-crystallizing block copolymers is investigated for the first time.
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16
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Verheyen L, De Winter J, Gerbaux P, Koeckelberghs G. Effect of the Nature and the Position of Defects on the Chiral Expression in Poly(3-alkylthiophene)s. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01858] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lize Verheyen
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, Box 2404, 3001 Heverlee, Belgium
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS), Place du Parc 23, B-7000 Mons, Belgium
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS), Place du Parc 23, B-7000 Mons, Belgium
| | - Guy Koeckelberghs
- Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, Box 2404, 3001 Heverlee, Belgium
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17
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Meenu K, Bag DS, Lagarkha R, Tomar R, Gupta AK. Functional Polysilanes and their Optical, Chiroptical and Photoluminescence Properties. CURRENT ORGANOCATALYSIS 2019. [DOI: 10.2174/2213337206666190415124549] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
‘Polysilanes’ is an important class of inorganic polymers having Si-Si σ-conjugation along the backbone. They exhibit extraordinary electronic and photophysical properties and find suitable optoelectronics applications. They are typically synthesized by Wurtz coupling reaction of dichlorodialkylsilane or dichlorodiphenylsilane or dichloroalkylphenylsilane and their combinations under drastic reaction conditions by using sodium dispersion in boiling toluene. In such a drastic condition, no functional groups sustain with polysilane polymer. In order to achieve such functional materials, researchers have been interested in synthesizing functional polysilane with a different functional group like a chiral group, azobenzene containing chromophore and other heteroatoms in their main chain or side chain. Therefore, it is a very challenging task to synthesize polysilanes having effective functionality integrated with their structures. However, the modern technological demand of materials leads to efforts to obtain polymers having functional and multifunctional activity in a single material. In this review article, we cover the synthesis of polysilane with functional activity via pre-polymerization and post-polymerization with a functional group.
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Affiliation(s)
- Km. Meenu
- Defence Material and Stores Research and Development Establishment (DMSRDE) DMSRDE P.O., G.T. Road, Kanpur-208013, India
| | - Dibyendu S. Bag
- Defence Material and Stores Research and Development Establishment (DMSRDE) DMSRDE P.O., G.T. Road, Kanpur-208013, India
| | - Rekha Lagarkha
- Department of Chemistry Bundelkhand University Jhansi-284128, India
| | - Radha Tomar
- SOS in Chemistry, Jiwaji University, Gwalior-474011, India
| | - Arvind K. Gupta
- Defence Research and Development Establishment (DRDE), Gwalior- 474001, India
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18
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Scholz M, Morgenroth M, Cho MJ, Choi DH, Oum K, Lenzer T. Ultrafast Broadband Transient Absorption and Circular Dichroism Reveal Relaxation of a Chiral Copolymer. J Phys Chem Lett 2019; 10:5160-5166. [PMID: 31436421 DOI: 10.1021/acs.jpclett.9b02061] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We present a study of the photoinduced dynamics of the chiral polyfluorene-phenylene copolymer PFPh in THF and in cholesteric thin films. After photoexcitation at 370 nm in THF, ultraviolet-visible-near-infrared (UV-vis-NIR) transient absorption spectra show fast subpicosecond to picosecond intrachain migration of singlet excitons, solvation dynamics, and an exciton lifetime of 410 ps. The PFPh thin film features also interchain singlet exciton migration and exhibits shorter (2.1 and 240 ps) and longer lifetime components (2800 ps, interchain recombination). Furthermore, a setup for ultrafast UV-vis broadband transient circular dichroism (TrCD) spectroscopy has been developed. Fast supramolecular relaxation processes are observed, which are linked to changes in the anisotropic polarizability and pitch length of the cholesteric film. Such combined ultrafast transient CD and absorption experiments hold promise to reveal not only details of relaxation processes in supramolecular arrangements but also structural rearrangements of chiral molecular systems featuring CD signals in the UV-vis region.
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Affiliation(s)
- Mirko Scholz
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Marius Morgenroth
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Min Ju Cho
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul 136-701, Korea
| | - Dong Hoon Choi
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul 136-701, Korea
| | - Kawon Oum
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Thomas Lenzer
- Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
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19
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20
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Schulz M, Zablocki J, Abdullaeva OS, Brück S, Balzer F, Lützen A, Arteaga O, Schiek M. Giant intrinsic circular dichroism of prolinol-derived squaraine thin films. Nat Commun 2018; 9:2413. [PMID: 29925832 PMCID: PMC6010436 DOI: 10.1038/s41467-018-04811-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 05/18/2018] [Indexed: 12/27/2022] Open
Abstract
Molecular chirality and the inherently connected differential absorption of circular polarized light (CD) combined with semiconducting properties offers great potential for chiral opto-electronics. Here we discuss the temperature-controlled assembly of enantiopure prolinol functionalized squaraines with opposite handedness into intrinsically circular dichroic, molecular J-aggregates in spincasted thin films. By Mueller matrix spectroscopy we accurately probe an extraordinary high excitonic circular dichroism, which is not amplified by mesoscopic ordering effects. At maximum, CD values of 1000 mdeg/nm are reached and, after accounting for reflection losses related to the thin film nature, we obtain a film thickness independent dissymmetry factor g = 0.75. The large oscillator strength of the corresponding absorption within the deep-red spectral range translates into a negative real part of the dielectric function in the spectral vicinity of the exciton resonance. Thereby, we provide a new small molecular benchmark material for the development of organic thin film based chiroptics.
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Affiliation(s)
- Matthias Schulz
- Kekulé Insitute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn, Gerhard-Domagk-Str. 1, D-53121, Bonn, Germany
| | - Jennifer Zablocki
- Kekulé Insitute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn, Gerhard-Domagk-Str. 1, D-53121, Bonn, Germany
| | - Oliya S Abdullaeva
- Energy and Semiconductor Research Laboratory, Institute of Physics, Carl-von-Ossietzky-University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, D-26129, Oldenburg, Germany
| | - Stefanie Brück
- Kekulé Insitute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn, Gerhard-Domagk-Str. 1, D-53121, Bonn, Germany
| | - Frank Balzer
- Mads Clausen Institute, University of Southern Denmark, Alsion 2, DK-6400, Sønderborg, Denmark
| | - Arne Lützen
- Kekulé Insitute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn, Gerhard-Domagk-Str. 1, D-53121, Bonn, Germany
| | - Oriol Arteaga
- Department of Applied Physics and IN2UB, University of Barcelona, Barcelona, 08028, Spain
| | - Manuela Schiek
- Energy and Semiconductor Research Laboratory, Institute of Physics, Carl-von-Ossietzky-University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, D-26129, Oldenburg, Germany.
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21
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22
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Zhao Y, Yin L, Liu J, Chen H, Zhang W. Helical screw sense bias in chiral polyfluorene stimulated by solvent. Chirality 2017; 29:107-114. [DOI: 10.1002/chir.22677] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 02/12/2017] [Accepted: 02/14/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Yin Zhao
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou China
| | - Lu Yin
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou China
| | - Jingjing Liu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou China
| | - Hailing Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou China
| | - Wei Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou China
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23
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Gon M, Sawada R, Morisaki Y, Chujo Y. Enhancement and Controlling the Signal of Circularly Polarized Luminescence Based on a Planar Chiral Tetrasubstituted [2.2]Paracyclophane Framework in Aggregation System. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02798] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku,
Katsura, Kyoto 615-8510, Japan
| | - Risa Sawada
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku,
Katsura, Kyoto 615-8510, Japan
| | - Yasuhiro Morisaki
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku,
Katsura, Kyoto 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku,
Katsura, Kyoto 615-8510, Japan
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24
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Schulz M, Mack M, Kolloge O, Lützen A, Schiek M. Organic photodiodes from homochiral l-proline derived squaraine compounds with strong circular dichroism. Phys Chem Chem Phys 2017; 19:6996-7008. [DOI: 10.1039/c7cp00306d] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We demonstrate the feasibility of inserting highly circular dichroic active layers into an organic photodiode as a potential detector for circular polarized light.
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Affiliation(s)
- Matthias Schulz
- Kekulé Institute of Organic Chemistry and Biochemistry
- Rheinische-Friedrich-Wilhelms-University of Bonn
- D-53121 Bonn
- Germany
| | - Majvor Mack
- Energy and Semiconductor Research Laboratory
- Institute of Physics
- University of Oldenburg
- D-26129 Oldenburg
- Germany
| | - Oliver Kolloge
- Energy and Semiconductor Research Laboratory
- Institute of Physics
- University of Oldenburg
- D-26129 Oldenburg
- Germany
| | - Arne Lützen
- Kekulé Institute of Organic Chemistry and Biochemistry
- Rheinische-Friedrich-Wilhelms-University of Bonn
- D-53121 Bonn
- Germany
| | - Manuela Schiek
- Energy and Semiconductor Research Laboratory
- Institute of Physics
- University of Oldenburg
- D-26129 Oldenburg
- Germany
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25
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Zhang Q, Li J. Characteristics of surface plasmon polaritons in a dielectrically chiral-metal-chiral waveguiding structure. OPTICS LETTERS 2016; 41:3241-3244. [PMID: 27420505 DOI: 10.1364/ol.41.003241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate theoretically the characteristics of surface plasmon polaritons (SPPs) with an asymmetric chiral-metal-chiral (CMC) waveguide structure, under realistic frequency dependencies of the permittivity and chirality parameters. Generalized dispersion relations are derived which can be applied to the nonchiral SPPs. We find that the existence of cutoffs in different modes for the CMC structures may facilitate the design of mode-selective surface plasmon waveguides. CMC-SPPs also exhibit an interesting dependence of the polarization on the chiral strength. These novel characteristics of CMC-SPPs provide new possibilities for the design of more compact nanophotonic devices.
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26
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Zhao Y, Abdul Rahim NA, Xia Y, Fujiki M, Song B, Zhang Z, Zhang W, Zhu X. Supramolecular Chirality in Achiral Polyfluorene: Chiral Gelation, Memory of Chirality, and Chiral Sensing Property. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00376] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yin Zhao
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design
and Application, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, China
| | - Nor Azura Abdul Rahim
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Yijun Xia
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design
and Application, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, China
| | - Michiya Fujiki
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Bo Song
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design
and Application, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, China
| | - Zhengbiao Zhang
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design
and Application, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, China
| | - Wei Zhang
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design
and Application, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, China
| | - Xiulin Zhu
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design
and Application, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, China
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27
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Cho MJ, Ahn JS, Kim YU, Um HA, Prasad PN, Lee GJ, Choi DH. New fluorene-based chiral copolymers with unusually high optical activity in pristine and annealed thin films. RSC Adv 2016. [DOI: 10.1039/c5ra26523a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polyfluorene (PF)-based chiral alternating copolymers, i.e., PFPh and PFTh, were successfully synthesized to obtain high circular dichroism (CD) in pristine thin films.
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Affiliation(s)
- Min Ju Cho
- Department of Chemistry
- Research Institute for Natural Sciences
- Korea University
- Seoul 136-701
- Korea
| | - Jong-Soo Ahn
- Department of Chemistry
- Research Institute for Natural Sciences
- Korea University
- Seoul 136-701
- Korea
| | - Young-Un Kim
- Department of Chemistry
- Research Institute for Natural Sciences
- Korea University
- Seoul 136-701
- Korea
| | - Hyun Ah Um
- Department of Chemistry
- Research Institute for Natural Sciences
- Korea University
- Seoul 136-701
- Korea
| | - Paras N. Prasad
- Institute for Lasers, Photonics and Biophotonics
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
| | - Geon Joon Lee
- Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
| | - Dong Hoon Choi
- Department of Chemistry
- Research Institute for Natural Sciences
- Korea University
- Seoul 136-701
- Korea
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28
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Yang X, Seo S, Park C, Kim E. Electrical Chiral Assembly Switching of Soluble Conjugated Polymers from Propylenedioxythiophene-Phenylene Copolymers. Macromolecules 2014. [DOI: 10.1021/ma501059z] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xu Yang
- Department of Chemical and
Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Seogjae Seo
- Department of Chemical and
Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Chihyun Park
- Department of Chemical and
Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Eunkyoung Kim
- Department of Chemical and
Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
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29
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Li X, Zhu L, Duan S, Zhao Y, Ågren H. Aggregation-induced chiral symmetry breaking of a naphthalimide–cyanostilbene dyad. Phys Chem Chem Phys 2014; 16:23854-60. [DOI: 10.1039/c4cp04070h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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