title: Efficient Synthesis of Ir-Polyoxometalate Cluster Using a Continuous Flow Apparatus and STM Investigation of Its Coassembly Behavior on HOPG Surface.
abstract: Taking advantage of a continuous-flow apparatus, the iridium(III)-containing polytungstate cluster K12Na2H2[Ir2Cl8P2W20O72]·37H2O (1) was obtained in a reasonable yield (13% based on IrCl3·H2O). Compound 1 was characterized by Fourier transform IR, UV-visible, (31)P NMR, electrospray ionization mass spectrometry (ESI-MS), and thermogravimetric analysis measurements. (31)P NMR, ESI-MS, and elemental analysis all indicated 1 was a new polytungstate cluster compared with the reported K14[(IrCl4)KP2W20O72] compound. Intriguingly, the successful isolation of 1 relied on the custom-built flow apparatus, demonstrating the uniqueness of continuous-flow chemistry to achieve crystalline materials. The catalytic properties of 1 were assessed by investigating the activity on catalyzing the electro-oxidation of ruthenium tris-2,2'-bipyridine [Ru(bpy)3](2+/3+). The voltammetric behavior suggested a coupled catalytic behavior between [Ru(bpy)3](3+/2+) and 1. Furthermore, on the highly oriented pyrolytic graphite surface, 1,3,5-tris(10-carboxydecyloxy) benzene (TCDB) was used as the two-dimensional host network to coassemble cluster 1; the surface morphology was observed by scanning tunneling microscope technique. "S"-shape of 1 was observed, indicating that the cluster could be accommodated in the cavity formed by two TCDB host molecules, leading to a TCDB/cluster binary structure.
authors.affiliation: College of Biological, Chemical Science and Engineering, Jiaxing University , Jiaxing 314001, P. R. China.
authors.forename: Junyong
authors.initials: J
authors.lastname: Zhang
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , 11 Zhongguancun Beiyitiao, Beijing, 100190, P. R. China.
authors.forename: Shaoqing
authors.initials: S
authors.lastname: Chang
authors.affiliation: School of Chemistry, The University of New South Wales , Sydney, NSW 2052, Australia.
authors.forename: Bryan H R
authors.initials: BH
authors.lastname: Suryanto
authors.affiliation: College of Biological, Chemical Science and Engineering, Jiaxing University , Jiaxing 314001, P. R. China.
authors.forename: Chunhua
authors.initials: C
authors.lastname: Gong
authors.affiliation: College of Biological, Chemical Science and Engineering, Jiaxing University , Jiaxing 314001, P. R. China.
authors.forename: Xianghua
authors.initials: X
authors.lastname: Zeng
authors.affiliation: School of Chemistry, The University of New South Wales , Sydney, NSW 2052, Australia.
authors.forename: Chuan
authors.initials: C
authors.lastname: Zhao
authors.affiliation: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , 11 Zhongguancun Beiyitiao, Beijing, 100190, P. R. China.
authors.forename: Qingdao
authors.initials: Q
authors.lastname: Zeng
authors.affiliation: College of Biological, Chemical Science and Engineering, Jiaxing University , Jiaxing 314001, P. R. China.|State Key Laboratory of Coordination Chemistry, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Jingli
authors.initials: J
authors.lastname: Xie