Russell-Webster Bradley, Lopez-Nieto Javi, Abboud Khalil A, Christou George
Department of Chemistry, University of Florida, Gainesville, FL, 32611-7200, USA.
Angew Chem Int Ed Engl. 2021 May 25;60(22):12591-12596. doi: 10.1002/anie.202103110. Epub 2021 Apr 26.
Ultra-small nanoparticles of CeO obtained in molecular form, so-called molecular nanoparticles, have been limited to date to a family whose largest member is of nuclearity Ce with a {Ce O } core atom count. Herein we report that a synthetic procedure has been developed to the cation [Ce O (OH) (O CPh) (PhCO H) (H O) ] , a member with a much higher Ce nuclearity and a {Ce O } core that is more akin to the smallest ceria nanoparticles. Its crystal structure reveals it to possess a 2.4 nm size and high D symmetry, and it has also allowed identification of core surface features including facet composition, the presence and location of Ce and H (i.e. HO ) ions, and the binding modes of the ligand monolayer of benzoate, benzoic acid, and water ligands.
以分子形式获得的超小二氧化铈纳米颗粒，即所谓的分子纳米颗粒，迄今为止仅限于一个家族，其最大成员是具有{CeO}核心原子数的Ce核。在此我们报告，已经开发出一种合成方法来制备阳离子[CeO(OH)(OCPh)(PhCOH)(HO)]，它是一个具有更高Ce核且{CeO}核心更类似于最小氧化铈纳米颗粒的成员。其晶体结构表明它具有2.4 nm的尺寸和高D对称性，并且还能够识别核心表面特征，包括晶面组成、Ce和H（即HO）离子的存在和位置，以及苯甲酸酯、苯甲酸和水配体的配体单层的结合模式。
