Structure, thermal and optical properties of hydrogen bond stabilized hybrid rare-earth selenates: [(CH3)3NH][Ln(H2O)4(SeO4)2], (Ln = Pr, Nd)
作者:Sandesh K. Divekar、S. Nagabhusan Achary、Vishnu R. Ajgaonkar
DOI:10.1016/j.ica.2023.121803
日期:2024.1
Nd3+ compounds are isostructural and have triclinic (space group P-1) lattices with distorted cubical [LnO4(OH2)4], and tetrahedral (CH3)3NH+ and SeO42─ entities as structure building units. The [LnO4(OH2)4] and SeO42─ units are linked together through oxygen atoms forming chains of [Ln(H2O)4(SeO4)2]─ and these chains are linked together by cyclic, acyclic and bifurcated hydrogen bonds. The charge neutralization
三甲基铵和Ln(III)的水合杂化双硒酸盐的结构、热稳定性和光学性质,如[(CH 3 ) 3 NH][Ln(H 2 O) 4 (SeO 4 ) 2 ];报告 Ln = Pr、Nd(命名为 PrTMAS 和 NdTMAS)。两种水合双硒酸盐均在受控气氛和温度下从水溶液中结晶出来,并通过单晶X射线衍射测定了它们的晶体结构。Pr 3+和 Nd 3+化合物都是同构的,具有三斜晶格(空间群P -1),具有扭曲的立方晶格 [LnO 4 (OH 2 ) 4 ]、四面体晶格 (CH 3 ) 3 NH +和 SeO 4 2─作为结构构建单元的实体。[LnO 4 (OH 2 ) 4 ] 和 SeO 4 2─单元通过氧原子连接在一起,形成 [Ln(H 2 O) 4 (SeO 4 ) 2 ] ─ 链,并且这些链通过环状、无环连接在一起和分叉氢键。晶胞中的电荷中和是通过占据链之间的三甲基铵离子来实现的。FTIR 和