Preparation of polymers containing Fe(0)-coordinated 2,5-diethynylsilole units

Ohshita, Joji; Arase, Hidekazu; Sumida, Tomohisa; Mimura, Nobuhisa; Yoshimoto, Kazuhiro; Tada, Yosuke; Kunugi, Yoshihito; Harima, Yutaka; Kunai, Atsutaka

doi:10.1016/j.ica.2005.01.017

Cited by 8 publications

(7 citation statements)

References 27 publications

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“…It should be noted that the coordination process decreased the molecular weights of the resulting products. Copolymers 75d and 75e showed decomposition temperatures of 214 and 220 °C, respectively, which is greatly lower than that of their precursors 74d and 74e , which can be attributed to the liberation of Fe(CO) 3 during the heating process 107. UV absorption spectra of 75d and 75e ( λ ab ≈ 405 nm) showed that the Fe(CO) 3 coordination slightly decreased conjugation lengths of the polymers.…”

Section: π‐Conjugated Scps: Copolymersmentioning

confidence: 94%

“…Copolymers 75d and 75e showed decomposition temperatures of 214 and 220 8C, respectively, which is greatly lower than that of their precursors 74d and 74e, which can be attributed to the liberation of Fe(CO) 3 during the heating process. [107] UV absorption spectra of 75d and 75e (l ab % 405 nm) showed that the Fe(CO) 3 coordination slightly decreased conjugation lengths of the polymers. For polymers 74a-c, however, no coordination could be realized, possibly because of steric hindrance from the 1,1-diphenyl groups on the silole units.…”

Section: Silole-ethynylene Copolymersmentioning

confidence: 98%

“…Besides 71e , more σ – π ‐conjugated 2,5‐diethynylsilole–organosilicon alternating copolymers 74 were synthesized by the Sonogashira coupling reactions of 2,5‐dibromosilole and organosilicon diynes (Scheme ) 106, 107. The $\overline M _{\rm w}$ of 74 ranged from 8 000 to 21 000 with $\overline M _{\rm w} /\overline M _{\rm n}$ ≤ 2.5.…”

Section: π‐Conjugated Scps: Copolymersmentioning

confidence: 99%

See 2 more Smart Citations

Silole‐Containing Polymers: Chemistry and Optoelectronic Properties

Chen

Cao

2007

Macromol. Rapid Commun.

334

139

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In this review, the synthesis and optoelectronic properties of various π‐conjugated‐, σ‐conjugated‐, pendanted‐, and hyperbranched or dendritic silole‐containing polymers (SCPs) are described. So far, substituted silole, dibenzosilole, dithienosilole, and bis‐silicon‐bridged stilbene have been incorporated into SCPs. The tunable bandgaps from 4.0–1.55 eV, variable fluorescent colors from UV to blue, green, and red (RGB) light, fluorescent chemo‐sensors for 2,4,6‐trinitrotoluene (TNT)‐type explosives, aggregation‐induced emission, efficient electroluminescence emissions for RGB lights, phosphorescent hosts with high triplet energy level, efficient solar cells, stable field‐effect transistors with high hole mobility in air, and attenuation of strong laser power, are the important features of SCPs.

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Section: π‐Conjugated Scps: Copolymersmentioning

confidence: 94%

Section: Silole-ethynylene Copolymersmentioning

confidence: 98%

Section: π‐Conjugated Scps: Copolymersmentioning

confidence: 99%

See 1 more Smart Citation

Silole‐Containing Polymers: Chemistry and Optoelectronic Properties

Chen

Cao

2007

Macromol. Rapid Commun.

334

139

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“…It should be noted that the coordination process decreased the molecular weights of the resulting products. Copolymers 97d and e showed decomposition temperatures of 214 and 220 • C, respectively, much lower than those of their precursors 96d and e; this can be attributed to the liberation of Fe(CO) 3 during the heating process [89]. UV absorption spectra of 97d and e (λ max (abs) ∼405 nm) showed that the Fe(CO) 3 -coordination slightly decreased conjugation lengths of the polymers.…”

Section: Silole-containing Polymers With σ -π -Mixed Conjugationmentioning

confidence: 94%

“…σ -π-Conjugated 2,5-diethynylsilole-organosilicon alternating copolymer 96 were synthesized by the Sonogashira coupling reactions of 2,5-dibromosilole and organosilicon diynes (Scheme 8.50) [88,89]. The M w of 96 ranged from 8000 to 21 000 with M w /M n ≤ 2.5.…”

Section: Silole-containing Polymers With σ -π -Mixed Conjugationmentioning

confidence: 99%

Silole‐Containing Conjugated Polymers

Lam

Chen

Dong

et al. 2010

Design and Synthesis of Conjugated Polymers

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Conjugated polymers have drawn broad attention owing to their important applications in polymeric light-emitting diodes (PLEDs) [1, 2], photovoltaic cells (PVCs) [3], field-effect transistors (FETs) [4], and their chemosensing abilities of various targets [5]. Solution processing of the conjugated polymers, such as spin coating and printing, is the attractive advantage in the fabrications of large-area optoelectronic devices. Conjugated polymers are the best candidates that can be used to fabricate flexible optoelectronic devices [6]. A notable feature of conjugated polymers also lies in the enormous versatility of synthetic methodology, which affords wide scope to construct new polymers with improved properties.Siloles [7][8][9][10] or silacyclopentadienes are a group of five-membered silacyclics that possess σ * −π * conjugation arising from the interaction between the σ * orbital of two exocyclic σ -bonds on the silicon atom and the π * orbital of the butadiene moiety [11]. The calculated LUMO level of a silole ring is lower than that of other heterocyclopentadienes, such as pyrrole, furan, and thiophene [10,11]. The unique aromaticity and the low-lying LUMO level endue siloles with intriguing optoelectronic properties. Siloles 1−4, as shown in Scheme 8.1, are the typical building blocks to construct various silole-containing polymers (SCPs).Up to six substituents can be attached to the simple silole ring of 1, which allows considerable room for tuning the optoelectronic properties. 2,3,4,5-Tetraarylsiloles, normally possessing noncoplanar geometry, are the widely studied silole small molecules [7,[12][13][14][15][16][17][18][19][20][21][22][23]. The distances between silole cores of any two adjacent 2,3,4,5-tetraarylsilole molecules, even in the solid state, are far from the normal π -π interaction distance (about 3−4Å), as found in the crystal structures [13]. Two unusual photophysical properties, aggregation-induced emission (AIE) [13,24] and blueshift of photoluminescence (PL) emission in the crystal state compared to that in amorphous solids [25], have been found for 2,3,4,5-tetraphenylsiloles.

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Metal‐Containing Polymers

Abd‐El‐Aziz

2012

Encyclopedia of Polymer Science and Technology

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Preparation of polymers containing Fe(0)-coordinated 2,5-diethynylsilole units

Cited by 8 publications

References 27 publications

Silole‐Containing Polymers: Chemistry and Optoelectronic Properties

Silole‐Containing Polymers: Chemistry and Optoelectronic Properties

Silole‐Containing Conjugated Polymers

Metal‐Containing Polymers

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