溶液中の青とNIR-IIのスピン・フリップ発光を持つバナジウム (III) 複合体
Matthias Dorn1, Jens Kalmbach2, Pit Boden3
1Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, Germany.
Journal of the American Chemical Society
|April 11, 2020
まとめ
研究者は,室温で青と近赤外線II (NIR-II) の発光を示す新しいヴァナジウム (III) 複合体,mer-[V(ddpd) [2][PF6]3を開発した. この画期的な発明は 貴重金属のルミノフォールに 費用対効果の高い代替手段を 提供しています
科学分野:
- 無機化学
- 材料科学
- フォト物理学
背景:
- 地球に豊富に存在する第1列の移行金属からの発光は,弱いリガンドフィールド分裂と効率的な非放射性崩壊により困難である.
- 近赤外線 (NIR) 領域での発光は,追加の非放射性経路のために特に困難です.
- 地球に豊富に存在する第1列の移行金属複合物は,溶液中の室温で1000 nm以上の放射を示していない.
研究 の 目的:
- 地球に豊富に存在する金属複合体,特にバナジウム (III) 複合体の発光特性を探求する.
- 青色およびNIR-II光体としてのバナジウム (III) 複合体の可能性を調査する.
- 高価な金属や希土元素の複合体に対して費用対効果の高い新しい発光材料を開発する.
主な方法:
- バナジウム (III) 複合体,mer-[V(ddpd) [2][PF6]3の合成と特徴付け
- 放射スペクトル,量子収量,寿命を測定するための光発光スペクトル.
- 室温の溶液 (アセトニトリル) と77Kのガラス (ヴァレロニトリル) で実施された試験
主要な成果:
- バナジウム (III) 複合体であるmer-[V(ddpd) [2][PF6]3は,アセトニトリルで室温約1100nm (NIR-II領域) で,量子収量1.8 × 10−4%を示している.
- 複合体は,室温でアセトニトリルで2%の量子収量を持つ強い青色光も示しています.
- これらの発見は,バナジウム (III) コンプレックスが二重モードのルミノフォアとして活力を示す.
結論:
- d2電子構成のバナジウム (III) 複合体は,青色およびNIR-II光体の一種である.
- これらの複合体は,高価な貴金属と希土元素に基づいた伝統的なルミノフォールに有望で費用対効果の高い代替手段を提供します.
- この研究は,様々な光学用途のための機能的な材料の開発のための新しい道を開きます.
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