Liquid crystalline PEDOT derivatives exhibiting reversible anisotropic electrochromism and linearly and circularly polarized dichroism

Jeong, Yongsoo; Akagi, Kazuo

doi:10.1039/c0jm04183a

Cited by 42 publications

(29 citation statements)

References 42 publications

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“…28, 48 As for the SCLC model, the forward bias current is an exponential function of the voltage as follows 28 = I kV m (4) where m is related to the density of states of the transport path and k is related to the film thickness, trap distribution, and conductivity of the transport path. 28 Figure 7 shows the I−V characteristic of the film device prepared from the poly(EDOTco-Py)/TiO 2 heterojunction.…”

Section: Langmuirmentioning

confidence: 99%

Copolymerization of EDOT with Pyrrole on TiO₂ Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Zhang

2014

Langmuir

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We used the photoexcited TiO2 films to initiate the copolymerization of 3,4-ethylenedioxythiophene with pyrrole, aiming to develop an organic/inorganic heterojunction. Specular reflection infrared spectroscopy analysis was used to monitor the process of polymerization and indicated that the copolymers directly grew on the TiO2 substrate. Dissecting the copolymers with ultraviolet photoelectron spectroscopy revealed the evolution of the valence-band electronic structures. Moreover, the resulting copolymer/TiO2 heterojunctions were investigated using electrochemical impedence and X-ray photoelectron spectroscopy. The Al/poly(3,4-ethylenedioxythiophene-co-pyrrole)/TiO2/ITO heterojunction device that was prepared from the hybrid film exhibited a conspicuous rectification. The heterojunction device was also explored with respect to the conduction models.

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Section: Langmuirmentioning

confidence: 99%

Copolymerization of EDOT with Pyrrole on TiO₂ Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Zhang

2014

Langmuir

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“…Furthermore, the present polymerization method using the N*‐LC as an asymmetric reaction field has profound versatility for the synthesis of helical π‐conjugated polymers that do not contain chiroptical substituents on side chains. In addition, a number of helical conjugated polymers, such as PEDOT derivatives,45a,b,g,h PBTs,45c PPys,45e and thienylene‐phenylene copolymers,46 were subsequently synthesized through chemical or electrochemical polymerization in N*‐LC environments. These results will be reviewed in Sections 4 and 5.…”

Section: Interfacial Acetylene Polymerization In a N*‐lc Field27amentioning

confidence: 99%

Synthesis of Conjugated Polymers in Chiral Nematic Liquid Crystal Fields

Matsushita

Akagi

2011

Israel Journal of Chemistry

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This review presents the progress made on current research in the synthesis of π‐conjugated polymers in chiral nematic liquid crystal (N*‐LC) fields through either chemical or electrochemical polymerization. The following are noteworthy advances in the field of π‐conjugated polymers. (i) Helical aliphatic conjugated polymers of helical polyacetylene (H‐PA) were synthesized using asymmetric interfacial polymerization in N*‐LC fields. (ii) Helical aromatic conjugated polymers with electroactive properties, such as poly(3,4‐ethylenedioxythiophene) (PEDOT) and polybithiophene (PBT), were synthesized using asymmetric electrochemical polymerization in N*‐LC fields. (iii) Chiral aromatic conjugated copolymers, such as the poly(bithienylene‐phenylene) (PBTP) derivative, were synthesized using the asymmetric Stille polycondensation reaction in N*‐LC fields. Throughout the document, it has been emphasized that by using N*‐LC systems as asymmetric polymerization fields, helix formation is possible for aliphatic and aromatic π‐conjugated polymers without chiroptical substituents on the side chains.

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“…Depending of the nature of the liquid crystalline state (e.g. nematic or cholesteric) fluorescent liquid crystals may emit linear or circular polarized light . Another promising feature of luminescent liquid crystals is that their brightness and color can be controlled by external stimuli such as temperature or electric fields .…”

Section: Introductionmentioning

confidence: 99%

Alkylated Aromatic Thioethers with Aggregation‐Induced Emission Properties—Assembly and Photophysics

Riebe

Saccone

Stelzer

et al. 2018

Chemistry An Asian Journal

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In this contribution, we present the synthesis and self‐assembly of alkylated thioethers with interesting photophysical properties. To this end, the emission, absorption and excitation spectra in organic solvents and as aggregates in water were measured as well as the corresponding photoluminescence quantum yields and lifetimes. The aggregates in aqueous media were visualized and measured using transmission electron microscopy. Besides that, crystal structures of selected compounds allowed a detailed discussion of the structure–property relationship. Furthermore, the mesomorphic behavior was investigated using polarized optical microscopy (POM) as well as differential scanning calorimetry (DSC).

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Liquid crystalline PEDOT derivatives exhibiting reversible anisotropic electrochromism and linearly and circularly polarized dichroism

Cited by 42 publications

References 42 publications

Copolymerization of EDOT with Pyrrole on TiO₂ Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Copolymerization of EDOT with Pyrrole on TiO₂ Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Synthesis of Conjugated Polymers in Chiral Nematic Liquid Crystal Fields

Alkylated Aromatic Thioethers with Aggregation‐Induced Emission Properties—Assembly and Photophysics

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Liquid crystalline PEDOT derivatives exhibiting reversible anisotropic electrochromism and linearly and circularly polarized dichroism

Cited by 42 publications

References 42 publications

Copolymerization of EDOT with Pyrrole on TiO2 Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Copolymerization of EDOT with Pyrrole on TiO2 Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Synthesis of Conjugated Polymers in Chiral Nematic Liquid Crystal Fields

Alkylated Aromatic Thioethers with Aggregation‐Induced Emission Properties—Assembly and Photophysics

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Product

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Copolymerization of EDOT with Pyrrole on TiO₂ Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films

Copolymerization of EDOT with Pyrrole on TiO₂ Semiconductor Films by One-Step Reaction, Structure-Dependent Electronic Properties, and Charge Conduction Models of the Composite Films