Takayuki Iijima

Functionalization of Oligosiloxane for Polyester Comonomer

Satoru Saotome, Yujia Liu, Takayuki Iijima, Masafumi Unno

This paper proposes a new functionalized oligosiloxane as a comonomer for polyester, designed to provide hydrophobic surface properties and enhance low-temperature impact resistance. The functionalization of polymer resin itself has attracted attention in the context of monomaterialization. Chemically designing the primary structure …

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Functionalization of Oligosiloxane for Polyester Comonomer

Satoru Saotome, Yujia Liu, Takayuki Iijima, Masafumi Unno

This paper proposes a new functionalized oligosiloxane as a comonomer for polyester, designed to provide hydrophobic surface properties and enhance low-temperature impact resistance. The functionalization of polymer resin itself has attracted attention in the context of monomaterialization. Chemically designing the primary structure …

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軽量鉄骨下地乾式間仕切り壁の地震時損傷制御に関する研究 その15 ランナーとスラブの接合部に関する実験計画

雄吉 岡田, Yukichi OKADA, 翔 付, Xiang Fu et autres

1,4‐Diiodobenzene with –COO–TEMPO (TEMPO = 2,2,6,6‐tetramethylpiperidine‐1‐oxyl‐4‐yl) substituents at 2,5‐positions: synthesis and use as a monomer for new π‐conjugated polymers having nitroxyl radicals in side chains

Takayuki Iijima, Masahiro Abe, Take‐aki Koizumi, Atsushi Fukaya et autres

The reaction of 2,5‐diiodo‐1,4‐benzenedicarbonyl chloride, C6H2I2(COCl)2‐p, with 4‐hydroxy‐2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO‐ol) gave I–Ph(COO–TEMPO)2–I, Monomer‐1. Pd‐catalyzed polycondensation of Monomer‐1 with Me3Sn‐Th‐SnMe3 (2,5‐bis(trimethylstannyl)thiophene) and Bu3Sn–CH = CH–SnBu3 (1,2‐bis‐(tributylstannyl)ethylene) gave the corresponding π‐conjugated polymers, Polymer‐1 and Polymer‐2, respectively. Monomer‐1 was converted to a diethynyl compound, H–C ≡ …

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リンクル構造内コロイド粒子配列の応用 1:棘状&カンチレバー状SERS活性基板の作製

Endo Hiroshi, Takayuki Iijima, Takeshi Kawai

Synthesis of π-Conjugated Polymers Containing Fluorinated Arylene Units via Direct Arylation: Efficient Synthetic Method of Materials for OLEDs

Wei Lu, Junpei Kuwabara, Takayuki Iijima, Hideyuki Higashimura et autres

Polycondensation via direct arylation of tetrafluorobenzene or octafluorobiphenyl was investigated for the synthesis of π-conjugated polymers consisting of fluorinated arylene units. The optimization of reaction conditions revealed that a combination of Pd(OAc) 2 and P t Bu 2 Me-HBF 4 is the …

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π‐Conjugated Polymers Consisting of 9,10‐Dihydrophenanthrene Units

Takakazu Yamamoto, Ryouichi Tokimitsu, Takahiro Asao, Takayuki Iijima et autres

Abstract π‐Conjugated polymers consisting of 9,10‐disubstituted 9,10‐dihydrophenenthrene, with the substituents octyl, 2‐ethylhexyl, ‐OSiBu3, etc., units are prepared by organometallic polycondensation. Homopolymers (PH2Ph(9,10‐R)) have a π‐conjugation system similar to that of polymers of 9,9‐dialkylfluorene and show UV‐Vis peaks at ≈380 nm. In addition …

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π‐Conjugated Polymers Consisting of Isothianaphthene and Dialkoxy‐p‐phenylene Units: Synthesis, Self‐Assembly, and Chemical and Physical Properties

Takakazu Yamamoto, Motoaki Usui, Haruki Ootsuka, Takayuki Iijima et autres

Abstract A series of π‐conjugated alternating copolymers consisting of Th‐ITN‐Th and p‐C6H2(OR)2 units were synthesized. XRD indicated that the copolymers assume an interdigitation packing mode, and UV‐Vis spectra revealed a strong tendency for self‐assembly. Upon molecular assembly of the copolymer, the UV‐Vis …

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Quadrimolecular recombination kinetics of photogenerated charge carriers in the composites of regioregular polythiophene derivatives and soluble fullerene

Hisaaki Tanaka, Yuki Yokoi, Naoki Hasegawa, Shin‐ichi Kuroda et autres

Light-induced electron spin resonance (LESR) measurements have been performed on the composites of regioregular polythiophene derivatives and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) in order to study the recombination kinetics of photogenerated charge carriers. We adopt two regioregular polymers with different side chains; …

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立体規則性を有するポリチオフェン誘導体と溶解性フラーレンから成る複合体における光励起された荷電キャリアの四分子再結合(QR)動力学

Tanaka Hisa-Aki, Yokoi Yuki, Hasegawa Naoki, Kuroda Shin-ichi et autres

Highly Coplanar Polythiophenes with –C≡CR Side Chains: Self-Assembly, Linear and Nonlinear Optical Properties, and Piezochromism

Takakazu Yamamoto, Takao Sato, Takayuki Iijima, Masahiro Abe et autres

Abstract Self-assembly of polythiophenes with –C≡CR (R = alkyl, phenyl, etc.) side chains has been investigated. Seven new polymers consisting of head-to-head and tail-to-tail 2,2′-bithiophenes with –C≡CR side chains were synthesized. The new polymers include alternating copolymers between bithiophenes with –C≡C–alkyl side …

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Main-Chain-Type 8-Quinolinol Polymers: Synthesis, Optical Properties, and Complex Formation with Metals

Takayuki Iijima, Shin‐ichi Kuroda, Takakazu Yamamoto

Poly(aryleneethynylene)-type polymers containing 8-quinolinol (qH) units in their main chain were prepared via Pd-catalyzed polycondensation. They were first obtained as −SiMe 2 t Bu group protected polymers, and the −SiMe 2 t Bu protected polymer had number average molecular weights ( M …

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