0000000001306511
AUTHOR
Chengyi Hu
Copper-hydride nanoclusters with enhanced stability by N-heterocyclic carbenes
AbstractCopper-hydrides have been intensively studied for a long time due to their utilization in a variety of technologically important chemical transformations. Nevertheless, poor stability of the species severely hinders its isolation, storage and operation, which is worse for nano-sized ones. We report here an unprecedented strategy to access to ultrastable copper-hydride nanoclusters (NCs), namely, using bidentate N-heterocyclic carbenes as stabilizing ligands in addition to thiolates. In this work, a simple synthetic protocol was developed to synthesize the first large copper-hydride nanoclusters (NCs) stabilized by N-heterocyclic carbenes (NHCs). The NC, with the formula of Cu31(RS)2…
Asymmetric Synthesis of Chiral Bimetallic [Ag28Cu12(SR)24]4- Nanoclusters via Ion Pairing
In this work, a facile ion-pairing strategy for asymmetric synthesis of optically active negatively charged chiral metal nanoparticles using chiral ammonium cations is demonstrated. A new thiolated chiral three-concentric-shell cluster, [Ag28Cu12(SR)24] 4- was first synthesized as a racemic mixture and characterized by single-crystal X-ray structure determination. Mass spectrometric measurements revealed relatively strong ion-pairing interactions between the anionic nanocluster and ammonium cations. Inspired by this observation, the as-prepared racemic mixture was separated into enantiomers by employing chiral quaternary ammonium salts as chiral resolution agents. Subsequently, direct asymm…
Asymmetric Synthesis of Chiral Bimetallic [Ag28Cu12(SR)24]4– Nanoclusters via Ion Pairing
In this work, a facile ion-pairing strategy for asymmetric synthesis of optically active negatively charged chiral metal nanoparticles using chiral ammonium cations is demonstrated. A new thiolated chiral three-concentric-shell cluster, [Ag28Cu12(SR)24]4–, was first synthesized as a racemic mixture and characterized by single-crystal X-ray structure determination. Mass spectrometric measurements revealed relatively strong ion-pairing interactions between the anionic nanocluster and ammonium cations. Inspired by this observation, the as-prepared racemic mixture was separated into enantiomers by employing chiral quaternary ammonium salts as chiral resolution agents. Subsequently, direct asymm…
Co-crystallization of atomically precise metal nanoparticles driven by magic atomic and electronic shells
This paper reports co-crystallization of two atomically precise, different-size ligand-stabilized nanoclusters, a spherical (AuAg)267(SR)80 and a smaller trigonal-prismatic (AuAg)45(SR)27(PPh3)6 in 1:1 ratio, characterized fully by X-ray crystallographic analysis (SR = 2,4-SPhMe2). The larger cluster has a four concentric-shell icosahedral structure of Ag@M12@M42@M92@Ag120(SR)80 (M = Au or Ag) with the inner-core M147 icosahedron observed here for metal nanoparticles. The cluster has an open electron shell of 187 delocalized electrons, fully metallic, plasmonic behavior, and a zero HOMO-LUMO energy gap. The smaller cluster has an 18-electron shell closing, a notable HOMO-LUMO energy gap and…
CCDC 2050535: Experimental Crystal Structure Determination
Related Article: Hui Shen, Lingzheng Wang, Omar López-Estrada, Chengyi Hu, Qingyuan Wu, Dongxu Cao, Sami Malola, Boon K. Teo, Hannu Häkkinen, Nanfeng Zheng|2021|Nano Res.|14|3303|doi:10.1007/s12274-021-3389-9
CCDC 1839942: Experimental Crystal Structure Determination
Related Article: Juanzhu Yan, Sami Malola, Chengyi Hu, Jian Peng, Birger Dittrich, Boon K. Teo, Hannu Häkkinen, Lansun Zheng, Nanfeng Zheng|2018|Nat.Commun.|9|3357|doi:10.1038/s41467-018-05584-9
CCDC 1508753: Experimental Crystal Structure Determination
Related Article: Juanzhu Yan, Haifeng Su, Huayan Yang, Chengyi Hu, Sami Malola, Shuichao Lin, Boon K. Teo, Hannu Häkkinen, and Nanfeng Zheng|2016|J.Am.Chem.Soc.|138|12751|doi:10.1021/jacs.6b08100
CCDC 1839941: Experimental Crystal Structure Determination
Related Article: Juanzhu Yan, Sami Malola, Chengyi Hu, Jian Peng, Birger Dittrich, Boon K. Teo, Hannu Häkkinen, Lansun Zheng, Nanfeng Zheng|2018|Nat.Commun.|9|3357|doi:10.1038/s41467-018-05584-9