title: The first examples of 1-D organic hybrid lanthanoid thioarsenates based on two [As(V)S4](3-) linkage modes.
abstract: A series of new 1-D organic hybrid lanthanoid thioarsenates [Ln(dap)2]2(μ-η(1):η(1):η(1):η(1)-AsS4)(μ-η(1):η(1)-As(V)S4)]n {Ln = Ce (Ia), Pr (Ib), Nd (Ic), and Sm (Id); dap = diaminopropane} have been prepared under solvothermal conditions and structurally characterized. Compounds Ia-d contain two [As(V)S4](3-) linkage modes, namely μ-η(1):η(1):η(1):η(1)-As(V)S4 and μ-η(1):η(1)-As(V)S4, which are linked alternately with [Ln(dap)2](3+) groups into 1-D neutral chains [Ln(dap)2]2(μ-η(1):η(1):η(1):η(1)-As(V)S4)(μ-η(1):η(1)-As(V)S4)]n, which represent the first examples of 1-D organic hybrid lanthanoid thioarsenates based on two [As(V)S4](3-) linkage modes. To learn more about the influence of lanthanide contraction on the formation of lanthanoid thioarsenates, five organic hybrid lanthanoid thioarsenates [Ln(dap)3As(V)S4] [Ln = Tb (IIa), Dy (IIb), Ho (IIIc), and Er (IIId)] and [Er(dien)2As(V)S4] (III, dien = diethylenetriamine) are also provided. Both II and III contain neutral lanthanide-centred complexes, where the tetrahedral anion [As(V)S4](3-) acts as a chelating ligand to the complex [Ln(dap)3](3+)/[Er(dien)2](3+) cation. Their optical properties have been characterized by UV-vis spectra, and the density functional theory calculation of Ia has been performed.
authors: College of Chemistry, Chongqing Normal University, Chongqing, 401331, P. R. China. lx7507@163.com Jianzhou888888@163.com.
authors: Rong-Qing
authors: RQ
authors: Zhao
authors: Xing
authors: X
authors: Liu
authors: Jian
authors: J
authors: Zhou
authors: Hong-Ping
authors: HP
authors: Xiao
authors: Hua-Hong
authors: HH
authors: Zou
authors: Lianshe
authors: L
authors: Fu
authors: Qiuling
authors: Q
authors: Tang
authors: Xiao-Feng
authors: XF
authors: Tan