A 3D Hybrid Praseodymium–Antimony–Oxochloride Compound: Single‐Crystal‐to‐Single‐Crystal Transformation and Photocatalytic Properties |
| |
| Authors: | Guo‐Dong Zou Gui‐Gang Zhang Dr Bing Hu Dr Jian‐Rong Li Dr Mei‐Ling Feng Prof Dr Xin‐Chen Wang Prof Dr Xiao‐Ying Huang |
| |
| Institution: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (P.R. China), Fax: (+86)?591–83793727;2. University of Chinese Academy of Sciences, Beijing, 100049 (P.R. China);3. Research Institute of Photocatalysis, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350002 (P.R. China) |
| |
| Abstract: | A 3D organic–inorganic hybrid compound, (2‐MepyH)3 {Fe(1,10‐phen)3}3]{Pr4Sb12O18(OH) Cl11.5}(TDC)4.5({Pr4Sb12O18(OH)Cl9.5} Cl)] ? 3 (2‐Mepy) ? 28 H2O ( 1 ; 2‐Mepy=2‐methylpyridine, 1,10‐phen=1,10‐phenanthroline, H2TDC=thiophene‐2,5‐dicarboxylic acid), was hydrothermally synthesized and structurally characterized. Unusually, two kinds of high‐nuclearity clusters, namely (Pr4Sb12O18 (OH)Cl11)(COO)5]5? and (Pr4Sb12O18 (OH)Cl9)Cl(COO)5]4?, coexist in the structure of compound 1 ; two of the latter clusters are doubly bridged by two μ2‐Cl? moieties to form a new centrosymmetric dimeric cluster. An unprecedented spontaneous and reversible single‐crystal‐to‐single‐crystal transformation was observed, which simultaneously involved a notable organic‐ligand movement between the metal ions and an alteration of the bridging ion in the dimeric cluster, induced by guest‐release/re‐adsorption, thereby giving rise to the interconversion between compound 1 and the compound (2‐MepyH)3{Fe(1,10‐phen)3}3]{Pr4Sb12O18(OH)Cl11.5}(TDC)4({Pr4Sb12O18Cl10.5(TDC)0.5(H2O)1.5}O0.5)] ? 25 H2O ( 1′ ). The mechanism of this transformation has also been discussed in great detail. Photocatalytic H2‐evolution activity was observed for compound 1′ under UV light with Pt as a co‐catalyst and MeOH as a sacrificial electron donor. |
| |
| Keywords: | cluster compounds dimerization organic– inorganic hybrid composites photolysis praseodymium |
|
|
