陽子メラミンによる元素水銀の異常に強い協同的非共性結合:密度関数および結合クラスター研究

Athanassios C Tsipis¹

¹Department of Chemistry, University of Ioannina, University Campus, 45110 Ioannina, Greece.

The journal of physical chemistry. A

|February 19, 2026

まとめ

プロトン化メラミンは,元素水銀 (Hg0) を捕獲する能力を著しく高めます. この突破により,トリプロトンメラミンは,非共性相互作用によって複数の水銀原子を強く結合させることができます.

科学分野:

環境化学環境化学
コンピューティング・ケミストリー
マテリアルサイエンス材料科学

背景:

元素水銀 (Hg0) は,電子構造と分子宿主に対する低い親和性により,捕獲の課題を提示しています.
水銀を捕獲するための効果的な方法の開発は,環境修復に不可欠です.

研究の目的:

元素水銀 (Hg0) と陽子メラミンとの相互作用を調査する.
水銀捕獲のための宿主としてのプロトンメラミンの可能性を調査する.

主な方法:

活用された密度関数理論 (DFT) 計算.
波動関数ベンチマークによる支持された発見.
自然結合軌道 (NBO),分子における原子の量子理論 (QTAIM),および非共振相互作用 (NCI) の分析を使用した.

主要な成果:

陽子化は,Hg0がメラミンと結合することを劇的に強化します.
トライプロトンメラミンは,高結合エネルギー (>Hg原子あたり20 kcal·mol-1) を有する最大3つのHg0原子を収納する.
追加のHg0原子は,π関連相互作用によって結合し,明確なモチーフを形成します.

結論:

プロトネーションと対称性により,強い,協力的,非共振的Hg0結合が可能になります.
Hg0-メラミン相互作用は,電静的および極化効果が支配する,非共性です.
プロトネートメラミンは,元素の水銀を捕獲するアプリケーションに希望を示しています.

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