Butterfly and Nest-Shaped Tp*-W-Cu-S Cluster Monomers and Dimers with Hexamethylenetetramine as Ligand: Anion-Dependent Structures and Nonlinear Optical Properties

• 作者: Quan Liu Mingjie Lu Lice Yu Yinglin Song Jianping Lang
• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Concise Reports
• 页码范围: 647-654
• 页数: 8页
• 语种: 英文
• DOI: 10.1002/cjoc.202000497

摘要

The assembly of[Et4N][Tp*WS3](1) with CuX (Tp* =hydridotris(3,5-dimethylpyrazol-1-yl)borate;X =Cl,Br,and I) or[Cu(MeCN)4][PF6]in the presence of tetratopic ligand hexamethylenetetramine (HMT) afforded an array of four cluster-based compounds,which areeither neutral or anionic.These compounds include[Tp*WS3Cu3Cl2(HMT)](2,monomer,neutral),[Tp*WS3Cu3Br2(HMT)](3,monomer,neutral),[Tp*WS3Cu3I1.5(HMT)]2I (4,dimer,anionic),and[Tp*WS3Cu2(HMT)]2(PF6)2 (5,dimer,anionic).The size of the halogen is foundto dictate the structures (2/3 versus 4),and the presence/absence of halogen also affects the utilization of coordinate site of HMT (4versus 5) by creating more available Cu(Ⅰ) site in the case of 5.The structures of 2-5 are also characterized using elemental analysis,Fourier-transform infrared (FT-IR) spectra,and ultraviolet-visible (UV-Vis) spectroscopy,with the dimeric structure of 5 also selectedfor the third-order nonlinear optical (NLO) property investigations.The NLO measurement results suggest that the hyperpolarizabilityvalue (γ) of 5,reflecting its NLO properties as a neat material,features 2.12×10-30 esu,and it is comparable to other W/Cu/S clus-ter-based molecular entities,rendering 5 a promising NLO-active material.