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Molecular structure and nanosecond optical limiting property of a typical silver cubane-like cluster containing tetraselenotungstate |
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| Authors: | Wen-Rui Yao Xin-Quan Xin |
| Institution: | a Department of Chemical Engineering and Chemistry, Anhui University of Technology, Maanshan, Anhui 243002, People's Republic of China b Department of Chemistry and Coordination Chemistry Institute, Nanjing University, Nanjing 210093, People's Republic of China c Department of Physics, Harbin Institute of Technology, Harbin 150001, People's Republic of China |
| Abstract: | A typical silver cubane-like heteroselenometallic cluster, (μ3-WSe4)Ag3(PPh3)3Cl·0.5SePPh3, was synthesized from reaction of Et4N]2WSe4] and Ag(PPh3)2(NO3) in CH2Cl2 solution and structurally characterized by X-ray crystallography. The compound crystallizes in the trigonal space group R3 with a=16.258(4), b=22.80(3) Å, V=5217(7) Å3, and Z=3. The structure contains a strongly distorted cubane-like {WAg3Se3Cl} core. The coordination geometries of the W center and each Ag atom are tetrahedral. The mean W-Ag separation is 3.010(3) Å. Optical nonlinearity of this cubane-like cluster was studied. Large optical limiting effect with threshold of 0.45 J/cm2 was observed with the laser pulses of 7 ns at 532 nm. |
| Keywords: | Heteroselenometalate Cubane-like cluster Crystal structure Silver cluster Optical limiting effect |
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