アリファティック N 置換機能的 8 構成のサイクル炭酸とそれらの有機触媒的ポリメリゼーションへのシンプルで簡単なアプローチ
Shrinivas Venkataraman1, Victor W L Ng1, Daniel J Coady2
1Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, Singapore 138669, Singapore.
Journal of the American Chemical Society
|October 13, 2015
まとめ
新しく機能する8基の循環炭酸を合成し,その有機触媒式リング開きポリメリゼーション (ROP) を調査した. トリアザビサイクロデセン (TBD) 触媒はポリメリゼーション速度を高め,調節可能な性質を持つ明確に定義されたポリマーを生成しました.
科学分野:
- ポリマー化学
- 有機合成
- 材料科学
背景:
- ポリマー合成のためのユニークなモノマー構造を提供する8つ構成のサイクル炭酸.
- 有機触媒は制御されたポリメリゼーションのための金属のない経路を提供します.
- N置換のダイエタノアミンは,循環炭酸合成のためのアクセシブルな前駆体である.
研究 の 目的:
- 新しいアリファティックなN置換された機能的な8つ組のサイクル炭酸を合成する.
- これらのモノメアの有機触媒式リング開封ポリメリゼーション (ROP) を調査する.
- ポリマー化運動とポリマーの特性に対する N 置換物と触媒の影響を調査する.
主な方法:
- N置換されたダイエタノラミンの内分子循環により,循環炭酸が形成される.
- トリアザビサイクロデセン (TBD) と1,8-ディアザビサイクロ[5.4.0]アンデク-7-エン (DBU) を用いた有機触媒ROP.
- 動的研究,計算分析,結果のポリマーの特徴付け (分子量,分散性,熱特性).
主要な成果:
- N-アリル,N-アルキル,およびN-カルバマートの代用サイクル炭酸塩を成功して合成した.
- TBDは,N-アルキル単体に対するDBUよりも優れた触媒活性を示し,ポリメリゼーション率を高めました.
- 低分散度 (Đ(M) ≤1. 3の明確に定義されたポリマーは,2時間以内に≥80%の変換で得られた.
- ポリマーの性質は,ガラス化温度 (T) と分解温度 (T) を含め,N置換基に基づいて調節可能であった.
結論:
- オルガノカタリティック ROPは,N置換された8つ構成のサイクル炭酸で,機能性ポリマーを生産する効率的な方法である.
- 触媒 (TBD vs. DBU) とN置換剤の選択は,ポリメリゼーション運動とポリマーの特性に大きな影響を及ぼします.
- このアプローチは,調節可能な熱特性とコポリメリゼーションの可能性を持つ機能的なポリカーボネートへの汎用的で魅力的な経路を提供します.
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