Presentations -

柔軟な構造を導入したジヒドロアクリジン誘導体の外部刺激応答性発光

三浦 洋平、栁町 諒、謝花 知俊、吉岡 直樹

日本化学会　第100春季年会, 

2020.03

, 

Oral presentation (general)

ベンズイミダゾールニトロニルニトロキシド結晶の磁気特性に及ぼすベンゾ環部位の化学修飾の効果

佐久間 聡、三浦 洋平、吉岡 直樹

日本化学会　第100春季年会, 

2020.03

, 

Poster presentation

アザフェナレンオキシル誘導体の合成と磁気特性に及ぼす化学修飾の効果

八村信輝、鈴木裕太郎、三浦 洋平、吉岡 直樹

日本化学会　第100春季年会, 

2020.03

, 

Poster presentation

電子求引性置換基を導入したtert-ブチルフェニルベンゾトリアジニル誘導体の合成と構造磁性相関

高橋 佑典、土屋 尚也、三浦 洋平、吉岡 直樹

第27回有機結晶シンポジウム (近畿大学東大阪キャンパス) , 

2018.10

, 

Poster presentation, 日本化学会有機結晶部会

Synthesis and EPR Spectra of Selectively Deuterated Nitronyl Nitroxide Derivatives

EMURA YOICHIRO, SAITO TAKATADA, MIURA YOUHEI, YOSHIOKA NAOKI

The Third Joint Conference of the Asia-Pacific EPR/ESR Society and The International EPR (ESR) Society (IES) (The University of Queensland) , 

2018.09

, 

Oral presentation (general), Asia-Pacific EPR/ESR Society

アルコキシ基を導入したジヒドロアザアセン結晶の加熱に伴う動的挙動

渡邉 純大、三浦 洋平、吉岡 直樹

第29回基礎有機化学討論会 (東京工業大学・大岡山キャンパス) , 

2018.09

, 

Poster presentation

ピリミジン骨格を集積ユニットとして導入した安定有機ラジカルの合成と性質

杉崎 晃、三浦 洋平、吉岡 直樹

第29回基礎有機化学討論会 (東京工業大学・大岡山キャンパス) , 

2018.09

, 

Poster presentation

6-オキソフェルダジルを化学修飾した安定ビラジカル誘導体の合成と物理化学的性質

大島 陸、三浦 洋平、吉岡 直樹

第29回基礎有機化学討論会 (東京工業大学・大岡山キャンパス) , 

2018.09

, 

Poster presentation

A-π-D-π-A 型および D-π-A 型ジヒドロアクリジン誘導体の溶液および固体状態における蛍光特性

布井 愛理沙、三浦 洋平、吉岡 直樹

第29回基礎有機化学討論会 (東京工業大学・大岡山キャンパス) , 

2018.09

, 

Poster presentation

Synthesis and Physicochemical Properties of Schiff Base Nitride Chromium(V) Modified with Hydroxyacetophenone

KURISU YUSUKE, MIURA YOUHEI, YOSHIOKA NAOKI

43rd International Conference on Coordination Chemistry (Sendai International Center) , 

2018.07

, 

Poster presentation

シッフ塩基銅(II)錯体の集積化と磁性に及ぼす配位子構造の効果

宮田 拓実、三浦 洋平、吉岡 直樹

錯体化学会 第68回討論会 (仙台国際センター) , 

2018.07

, 

Poster presentation

ベンゾ環部位に局在型ニトロキシドを導入したフタロシアニン金属錯体の合成と磁気的性質

土屋 遼、三浦 洋平、吉岡 直樹

錯体化学会 第68回討論会 (仙台国際センター) , 

2018.07

, 

Poster presentation

四座シッフ塩基金属錯体の集積挙動に及ぼす配位子の置換基効果

小林 由貴子、三浦 洋平、吉岡 直樹

錯体化学会 第68回討論会 (仙台国際センター) , 

2018.07

, 

Poster presentation

Magneto-Structural Correlation of Spin-Localized Nitroxide Radical Carrying a Naphthalene Backbone

鈴木 裕太郎、清水 勇樹、高橋 佑典、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Poster presentation

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Organic radical derivatives such as TEMPO with a localized spin density distribution over NO bond have enhanced chemical stability compared to -conjugated radical, however, they have not been used for spin center of molecular-based magnet. In the present study, a spinlocalized nitroxide radical carrying a naphthalene backbone (1) was synthesized and their crystal structures and magnetic property were analyzed. Two polymorphs with needle and plate shapes were obtained. Their magneto-structural correlation will be discussed.

Synthesis and Physicochemical Properties of Dimethyldihydrophenazine Cation Radical Derivative

伊藤 怜、高橋 佑典、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Oral presentation (general)

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For the construction of molecule-based magnet and conductor, various type of neutral radicals or ion radicals have been utilized. Electron donating dihydrophenazine unit is oxidized to form a stable cation radical species. In the present research, ion radical salt of 5,10-dimethyldihydrophenazine (1•+BF4-) was prepared and its crystal structure was measured at several temperatures. According to the X-ray structural analysis, the cation radical formed a columnar assembly. Detailed magneto-structural correlation will be discussed.

Magneto-Structural Correlation of Pyrroline N-Oxyl Biradical Derivatives Carrying Diphenyloxoverdazyl Radical

高橋 佑典、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Oral presentation (general)

　View Summary

The intramolecular magnetic interaction through non-conjugated framework has not been studied in detail. We have studied the intramolecular magnetic interaction through non-conjugated framework in the biradicals including pyrroline N-oxyl as a basic skeleton.1 The intramolecular ferromagnetic interaction was observed in hetero biradical 1 because of the spin-spin interaction between both spin sites.2 In the present study, the magneto-structural correlation of pyrroline N-oxyl based hetero biradicals 2 and 3 carrying diphenyloxoverdazyl radical will be discussed. The single crystals suitable for crystallographic study were obtained by slow evaporation. The dihedral angle between pyrroline ring and verdazyl ring is 18.5(1)degree, which was larger than that of 1 (5.0(2)degree), and one of phenyl is twisted due to the packing effect. Regarding the molecular packing, 3 forms a columnar structure with 3.97 Å separation. DFT calculations (UB3LYP/6-31G(d) level) using crystal coordinate implied intramolecular ferromagnetic interaction. There were small intermolecular antiferromagnetic interactions within and between the columns. The physicochemical properties will be discussed.

Synthesis and Physicochemical Property of Diphenylamine and Its Oxidized Derivatives Carrying Stable Organic Radical Units at para-Position

原田 祐太郎、池上 裕樹、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Poster presentation

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Molecules with ground spin multiplet can be designed by connecting plural paramagnetic spin center to appropriate spin coupler unit. Taking advantage of the steric effect of 1,5-diisopropyl-6-oxoverdazyl (VZ) unit, biradical derivatives have been designed and their magneto-structural correlation has been investigated. In the present research, diphenylamine derivative carrying two VZ units (1-VZ) was synthesized, its physicochemical properties were investigated. Solid-state SQUID measurement revealed that there is weak antiferromagnetic interaction following the Curie-Weiss law. The interaction was attributed to intramolecular interaction based on DFT calculation.

Synthesis of Dihydroacridine Derivatives Carrying a Verdazyl Unit and Their Spectroscopic Properties

栁町 諒、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Poster presentation

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Taking advantage of rigid structure and electron-donating nitrogen atom of 9,10-dihydroacridine, asymmetrically substituted derivatives were synthesized by introducing two different electron-accepting substituents at 2,7-positions. Their fluorescence properties were strongly affected by substituent. In the present paper, dihydroacridine derivatives carrying a precursor of verdazyl 1 have been newly synthesized and the effect of the substitution on fluorescent spectra will be discussed in connection with electronic structural analysis. 1 exhibited a noticeable fluorescence solvatochromism and emission in the solid-state. DFT calculation suggested that a precursor of verdazyl has electron donating property.

Effect of Ligand Structures of Schiff Base Cu(II) Complexes on Assembled Structure and Magnetic Properties

宮田 拓実、西川 大裕、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Oral presentation (general)

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During the study of magneto-structural correlation for Schiff base oxovanadium(IV) and nitridechromium(V), we found that ligand structure strongly affects the self-association of metal complexes. As for copper(II) complexes, dimer formation was reported for salen-basedcomplex. In the present study, relation between steric effect of Schiff base ligand and dimeric structure is discussed in connection with magnetic interaction. Two Cu(II) complexes, 2-Cu and 3-Cu, carrying bulky substituents at bridging phenylenediamine unit have been synthesized. Single crystal X-ray analysis revealed that both 2-Cu and 3-Cu form a dimer and intermolecular close contact between imine N and Cu was observed. Detailed magneto-structural correlation will be discussed.

Regulation of Thermo-Mechanically Response by Changing the Length of Alkoxy Chain in 5,12-Diacetyl-5,12-dihydroquinoxalino[2,3-b]quinoxaline Derivatives

渡邉 純大、三浦 洋平、吉岡 直樹

日本化学会第98春季年会 (日本大学理工学部・船橋キャンパス) , 

2018.03

, 

Oral presentation (general)

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Only a limited number of organic crystal exhibit thermosalient effect, and there are few reports that discuss the relationship between substituent groups and the phenomenon. We reported that 1-OC4 exhibited thermosalient effect at ca. 180 ℃, and the crystal of 1-OC6 shows thermomechanically response of peeling off to some thin layers at ca. 100 ℃. In the present research, 1-OC7, 1-OC8, 1-OC9, and 1-OC10 with longer alkoxy chains were prepared and studied their thermo-mechanically responses. While the thin layers peeled off from the crystal surface of 1-OC8 at ca. 80 ℃, the crystal of 1-OC10 collapsed before melting temperature at ca. 60 ℃. The crystals of 1-OC7 and 1-OC9 did not show the thermo-mechanically responses. Endothermic peaks were observed for the crystals of 1-OC4, OC6, OC8 and 1-OC10 at the temperature corresponding to the thermomechanically response. This indicate that phase transition by external heating induces thermomechanically response.