title: Shape-Controlled Synthesis of Trimetallic Nanoclusters: Structure Elucidation and Properties Investigation.
abstract: The shape-controlled synthesis of metal nanoclusters (NCs) with precise atomic arrangement is crucial for tailoring the properties. In this work, we successfully control the shape of alloy NCs by altering the dopants in the alloying processes. The shape of the spherical [Pt1Ag24(SPhMe2)18] NC is maintained when [AuISR] is used as dopant. By contrast, the shape of Pt1Ag24is changed to be rodlike by alloying with [AuI(PPh3)Br]. The structures of the trimetallic NCs were determined by X-ray crystallography and further confirmed by both DFT and far-IR measurements. The shape-preserved [Pt1Au6.4Ag17.6(SPhMe2)18] NC is in a tristratified arrangement-[Pt(center)@Au/Ag(shell)@Ag(exterior)]-and is indeed the first X-ray crystal structure of thiolated trimetallic NCs. On the other hand, the resulting rodlike NC ([Pt2Au10Ag13(PPh3)10Br7]) exhibits a high quantum yield (QY=14.7 %), which is in striking contrast to the weakly luminescent Pt1Ag24(QY=0.1 %, about 150-fold enhancement). In addition, the thermal stabilities of both trimetallic products are remarkably improved. This study presents a controllable strategy for synthesis of alloy NCs with different shapes (by alloying heteroatom complexes coordinated by different ligands), and may stimulate future work for a deeper understanding of the morphology (shape)-property correlation in NCs.
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Xi
authors.initials: X
authors.lastname: Kang
authors.affiliation: Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and, Applications of MOE, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Xiong
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Shuxin
authors.initials: S
authors.lastname: Wang
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Haizhu
authors.initials: H
authors.lastname: Yu
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Shan
authors.initials: S
authors.lastname: Jin
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Yongbo
authors.initials: Y
authors.lastname: Song
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.affiliation: Bruker (Beijing) Scientific Technology Co., Ltd., Beijing, 100081, P. R. China.
authors.forename: Liwei
authors.initials: L
authors.lastname: Zheng
authors.affiliation: Bruker (Beijing) Scientific Technology Co., Ltd., Beijing, 100081, P. R. China.
authors.forename: Chensong
authors.initials: C
authors.lastname: Pan
authors.affiliation: Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and, Applications of MOE, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Pei
authors.affiliation: Department of Chemistry and, Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
authors.forename: Manzhou
authors.initials: M
authors.lastname: Zhu
keywords: crystallography; photoluminescence; shape control; surface chemistry; trimetallic nanoclusters