Multicolor emission and thin film transistor properties of 1,8-diethynylcarbazole-based conjugated copolymers

Michinobu, Tsuyoshi; Osako, Haruka; Seo, Chayeon; Murata, Kimie; Mori, Takehiko; Shigehara, Kiyotaka

doi:10.1016/j.polymer.2011.10.028

Cited by 17 publications

(16 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PCzBT and PCzDTBT in tetrahydrofuran (THF) exhibited broad absorption spectra with maxima at 482 and 494 nm, respectively ( Fig. 1c,d ) 18 . The bands are attributed to intramolecular charge-transfer (CT) absorption between donor (carbazole (Cz)) and acceptor (benzothiadiazole (BT) or dithienylbenzothiadiazole (DTBT)) moieties.…”

Section: Resultsmentioning

confidence: 99%

“…Procedures for the synthesis of poly(1,8-carbazole)-benzothiadiazole copolymer (PCzBT, M n =5,400, M w / M n =1.6) and poly(1,8-carbazole)-dithienylbenzothiadiazole copolymer (PCzDTBT, M n =2,800, M w / M n =1.1) are described elsewhere 18 . The molecular weights of the polymers were determined by gel permeation chromatography using polystyrene standards.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Controlling photophysical properties of ultrasmall conjugated polymer nanoparticles through polymer chain packing

2017

Self Cite

View full text Add to dashboard Cite

Applications of conjugated polymer nanoparticles (Pdots) for imaging and sensing depend on their size, fluorescence brightness and intraparticle energy transfer. The molecular design of conjugated polymers (CPs) has been the main focus of the development of Pdots. Here we demonstrate that proper control of the physical interactions between the chains is as critical as the molecular design. The unique design of twisted CPs and fine-tuning of the reprecipitation conditions allow us to fabricate ultrasmall (3.0–4.5 nm) Pdots with excellent photostability. Extensive photophysical and structural characterization reveals the essential role played by the packing of the polymer chains in the particles in the intraparticle spatial alignment of the emitting sites, which regulate the fluorescence brightness and the intraparticle energy migration efficiency. Our findings enhance understanding of the relationship between chain interactions and the photophysical properties of CP nanomaterials, providing a framework for designing and fabricating functional Pdots for imaging applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Controlling photophysical properties of ultrasmall conjugated polymer nanoparticles through polymer chain packing

2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…20,21 The poly(1,8-carbazole)s displayed the combined properties of the poly(3,6-carbazole)s in terms of the connectivity pattern and poly(2,7-carbazole)s in terms of the effective conjugation length evaluated on the basis of the longest absorption maxima (λ max ). [22][23][24] The conventional synthesis of the aforementioned conjugated carbazole polymers was based on the Pd-catalyzed polycondensation, such as the Suzuki, Stille, and Sonogashira polycondensations. However, in order to construct an environmentally benign and cost-effective synthetic route of conjugated polymers, the direct arylation protocol, which activates the C-H bonds of the unprepared arenes or heteroarenes to directly react with aryl halides, was recently introduced.…”

Section: Introductionmentioning

confidence: 99%

Structural effects of dibromocarbazoles on direct arylation polycondensation with 3,4-ethylenedioxythiophene

Michinobu

2016

Polym. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The colors in the neutral (reduced) state are controlled by designing the polymer structures because of the ease of structural tuning of the organic materials. Donor–acceptor alternating structures are such an example of the spectral/band gap engineering 4…”

Section: Introductionmentioning

confidence: 99%

Click synthesis and reversible electrochromic behaviors of novel polystyrenes bearing aromatic amine units

Michinobu

2012

J. Polym. Sci. A Polym. Chem.

Self Cite

View full text Add to dashboard Cite

Novel electrochromic polymers were prepared by the click postfunctionalization of poly(4‐azidomethylstyrene) with alkyne‐containing aromatic amine units in the presence of Cu(I) catalysts. Two kinds of aromatic amine units, tris(4‐alkoxyphenyl)amine and N,N,N′,N′‐tetraphenyl‐p‐phenylenediamine, were introduced into polystyrene side chains, which were completely characterized by gel permeation chromatography–multiangle light scattering, nuclear magnetic resonance, and infrared spectroscopies, and elemental analysis. Thermal analyses demonstrated the high stability with the decomposition temperatures exceeding 300 °C even after postfunctionalization. The UV–vis absorption spectra of the polymer thin films revealed negligible absorption in the visible region, as reasonably confirmed by visual observation. The polymer thin films were prepared by spray‐coating on an indium tin oxide‐coated glass plate. Cyclic voltammograms of these films exhibited anodic peaks ascribed to the oxidation of the side‐chain aromatic amine moieties. The tris(4‐alkoxyphenyl)amine unit displayed one‐step oxidation at 0.287 V (vs. Ag/AgCl), while the N,N,N′,N′‐tetraphenyl‐p‐phenylenediamine unit showed two‐step oxidations at 0.297 and 0.641 V. These oxidation processes produced new colors of the polymer films. The former triarylamine‐based chromophore provided a blue color after the oxidation, while the latter phenylenediamine‐based chromophore showed a potentially controlled green and dark blue colors. The reversibility and switching behaviors of these color changes were also comprehensively investigated. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

show abstract

Multicolor emission and thin film transistor properties of 1,8-diethynylcarbazole-based conjugated copolymers

Cited by 17 publications

References 47 publications

Controlling photophysical properties of ultrasmall conjugated polymer nanoparticles through polymer chain packing

Controlling photophysical properties of ultrasmall conjugated polymer nanoparticles through polymer chain packing

Structural effects of dibromocarbazoles on direct arylation polycondensation with 3,4-ethylenedioxythiophene

Click synthesis and reversible electrochromic behaviors of novel polystyrenes bearing aromatic amine units

Contact Info

Product

Resources

About