TY - JOUR
T1 - Efficient synthesis of Ir-polyoxometalate cluster using a continuous flow apparatus and STM investigation of its coassembly behavior on HOPG surface
AU - Zhang, Junyong
AU - Chang, Shaoqing
AU - Suryanto, Bryan
AU - Gong, Chunhua
AU - Zeng, Xianghua
AU - Zhao, Chuan
AU - Zeng, Qingdao
AU - Xie, Jingli
PY - 2016/6/6
Y1 - 2016/6/6
N2 - 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, 31P NMR, electrospray ionization mass spectrometry (ESI-MS), and thermogravimetric analysis measurements. 31P 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.
AB - 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, 31P NMR, electrospray ionization mass spectrometry (ESI-MS), and thermogravimetric analysis measurements. 31P 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.
UR - https://www.scopus.com/pages/publications/84973335115
U2 - 10.1021/acs.inorgchem.6b00670
DO - 10.1021/acs.inorgchem.6b00670
M3 - Article
AN - SCOPUS:84973335115
SN - 0020-1669
VL - 55
SP - 5585
EP - 5591
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 11
ER -