Hou Lin-Lin, Bigdeli Fahime, Cheng Xun, Wang Ling-Xiao, Zhang Jing-Wen, Liu Kuan-Guan, Morsali Ali
Ningxia Key Laboratory of Photovoltaic Materials, School of Materials and New Energy, Ningxia University, Yin-Chuan, Ningxia 750021, China.
Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran 14117-13116, Iran.
Inorg Chem. 2022 Oct 24;61(42):16693-16698. doi: 10.1021/acs.inorgchem.2c02407. Epub 2022 Oct 14.
The synthesis of nanoclusters from simple structural units is usually a challenging process because of the complexity and unpredictability of the self-assembly process of these types of compounds. Herein, two new neutral 19-nuclearity silver nanoclusters based on alkynyl ligands with the formulas [(CrO)@Ag(C≡CBu)(PhPO)(tfa)(CHOH)] () and [(SO)@Ag(C≡CBu)(PhPO)(tfa)(CHOH)] (), in which tfa = trifluoroacetate, were synthesized, and their structures were investigated by single-crystal and powder X-ray diffraction, electrospray ionization mass spectrometry, elemental analyses, and Fourier transform infrared spectroscopy. The surface ligands of PhPOH and trifluoroacetate were assembled through hydrogen bonding, metal-aromatic interactions, and coordination bonding around 19 silver atoms as the metal skeletons of the nanoclusters. Sulfate and chromate anions, as a template within the metal skeleton of clusters through bonding with silver atoms, stabilized the structure. In addition, the UV-vis absorption spectroscopy, luminescence properties, and thermal stability of the nanoclusters were investigated.
从简单结构单元合成纳米团簇通常是一个具有挑战性的过程，因为这类化合物的自组装过程复杂且不可预测。在此，合成了两种基于炔基配体的新型中性19核银纳米团簇，其化学式分别为[(CrO)@Ag(C≡CBu)(PhPO)(tfa)(CHOH)] ()和[(SO)@Ag(C≡CBu)(PhPO)(tfa)(CHOH)] ()，其中tfa = 三氟乙酸盐，并通过单晶和粉末X射线衍射、电喷雾电离质谱、元素分析和傅里叶变换红外光谱对其结构进行了研究。PhPOH和三氟乙酸盐的表面配体通过氢键、金属-芳香相互作用以及围绕作为纳米团簇金属骨架的19个银原子的配位键进行组装。硫酸根和铬酸根阴离子通过与银原子键合，作为团簇金属骨架内的模板，稳定了结构。此外，还研究了纳米团簇的紫外-可见吸收光谱、发光性质和热稳定性。
