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[Ag₄₈(CC ^tBu) ₂₀(CrO₄) ₇: 非有機および有機リガンドによって共同保護された原子的に正確な銀ナノクラスター

Shan-Shan Zhang¹, Fahri Alkan², Hai-Feng Su³

¹Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials , Shandong University , Jinan , 250100 , People's Republic of China.

Journal of the American Chemical Society

|February 20, 2019

まとめ

研究者らは,無機クロメート (CrO42-) と有機アルキニルリガンドの両方をカバーした最初の銀ナノクラスター (Ag48) を合成した. この新しいコカピング戦略は,銀ナノクラスター合成と無機リガンドの役割に関する新しい洞察を提供します.

科学分野:

ナノ材料科学
無機化学
表面化学

背景:

原子精度の高い金属ナノクラスタを合成するには,リガンドの選択が不可欠です.
チオラートやフォスフィンのような有機リガンドは一般的に使用され,無機リガンドは十分に利用されていない.

研究の目的:

非有機クロマート (CrO42-) と有機アルキニルリガンドでコーケープされた最初の銀ナノクラスター (Ag48) を合成し,特徴づけること.
ナノクラスターの形成と構造における無機CrO42-の役割を調査する.

主な方法:

CrO42-とtBuCC-リガンドを用いたAg48ナノクラスタの合成
単結晶X線微分法による構造的特徴化.
電子特性とリガンドの調整の分析

主要な成果:

Ag48ナノクラスター (SD/Ag48) のコアシェル構造 (Ag23カーネル,Ag25シェル) の合成に成功しました.
ナノクラスターの表面に無機CrO42-と有機tBuCC-の共存が観測されました.
CrO42-の3つの重要な役割が特定されました: カーネルの受動化,コアとシェルの接続,シェルの保護です.
SD/Ag48は,分子のような吸収帯を持つ14電子超原子システムとして特徴付けられています.

結論:

銀ナノクラスター合成のための新しい無機リガンド戦略を確立した.
ナノクラスターの形状を制御するCrO42-の表面調整化学に関する新しい洞察を提供した.
金属ナノクラスターの有効なキャピングリガンドとしての無機オクソアニオンの可能性を実証した.

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