ディスフェノイド型ゼロ次元鉛,亜鉛,およびゲルマニウムハリド:高放射性シングレットおよびトリプレット自己捕捉エキシトンおよびX線シンチレーション
Viktoriia Morad1,2, Yevhen Shynkarenko1,2, Sergii Yakunin1,2
1Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Bioscience , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland.
Journal of the American Chemical Society
|June 28, 2019
まとめ
ゲルマニウム,チーン,鉛を基にした新しいゼロ次元金属ハライドは,明るいブロードバンド光放出を示します. これらの材料は,高量子効率と放射性により,光電子アプリケーションとX線検出の可能性を示しています.
科学分野:
- 材料科学
- 固体化学
- 光電子機器
背景:
- 低次元金属ハライドは,光電子装置のために探求されています.
- ns2元素 (Sn,Pb,Sb) のゼロ次元ハライドは効率的なブロードバンドエミーターである.
- これらの材料は,有機カチオン内の分離された金属ハライドセンターで構成されています.
研究 の 目的:
- 1-ブチル-1-メチル-ピペリジニウム (Bmpip) カチオンによるGe (II),Sn (II),Pb (II) の同構造ハリド複合体を合成し,特徴づけること.
- 光発光とX線で発光する性質を調査する.
- 光学的な行動における ステレオアクティブの単一のペアの役割を探求する.
主な方法:
- 新しいハライド複合体の合成
- 構造分析のための単一結晶X線微分
- 放射特性と量子効率を決定する光発光スペクトロスコーピー.
- X線検出機能のための放射性光度測定
主要な成果:
- Ge (II),Sn (II),Pb (II) の同構造ハリド複合体とBmpipが成功して合成された.
- 異常なディスフェノイド調整と高度にステレオアクティブな単体ペアが観察されました.
- 青から赤の領域で,最大75%の量子効率で明るく,スペクトル的に広範囲の放射が達成されました.
- Bmpip2SnI4 (730 nm) の近赤外線まで広がった.
- シングレットおよびトリプルエキシトニン放射帯は,Sn (II) およびGe (II) 化合物に対して観察された.
- Bmpip2SnBr4とBmpip2PbBr4は,商用シンチレータと比べて放射性であることが示された.
結論:
- 合成されたゼロ次元金属ハライドは,高い量子効率と広範囲の放射スペクトルを含む優れた発光特性を持っています.
- これらの材料は,先進的な光電子アプリケーションと効率的なX線シンチレータのための有望な候補です.
- 独特の協調環境とステレオアクティブの単一のペアは,彼らの例外的な光学性能の鍵です.
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