C(NH<sub>2</sub>)<sub>3</sub>Cd(C<sub>2</sub>O<sub>4</sub>)Cl(H<sub>2</sub>O)·H<sub>2</sub>O and BaCd(C<sub>2</sub>O<sub>4</sub>)<sub>1.5</sub>Cl(H<sub>2</sub>O)<sub>2</sub>: Two Oxalate Chlorides Obtained by Chemical Scissors Strategy Exhibiting Low-Dimensional Structural Networks and Balanced Overall Optical Properties
Wei Xu, Liang Ma, Yi‐Lei Lv, Siyu Ma, Wenlong Liu, Sheng‐Ping Guo, Ru‐Ling Tang
Abstract
Low-dimensional crystalline materials have attracted much attention due to their special physical and chemical properties. Herein, two new oxalate chlorides, C(NH 2 ) 3 Cd(C 2 O 4 )Cl(H 2 O)·H 2 O and BaCd(C 2 O 4 ) 1.5 Cl(H 2 O) 2, were synthesized. C(NH 2 ) 3 Cd(C 2 O 4 )Cl(H 2 O)·H 2 O presents the unique {[Cd(C 2 O 4 )Cl(H 2 O)] − } ∞ zigzag chain, while BaCd(C 2 O 4 ) 1.5 Cl(H 2 O) 2 shows a novel {[Cd(C 2 O 4 ) 1.5 Cl] 2– } ∞ layer. They showed large measured band gaps, which were 3.76 and 4.53 eV, respectively, and the latter was the largest band gap in the A-M-C 2 O 4 -X (A = Monovalent cationic or alkaline earth metals, X = F, Cl, Br, I) family. They exhibit a large calculated birefringence of 0.075 and 0.096 at 1064 nm, respectively. This study promotes the exploration of synthesizing low-dimensional crystalline materials with balanced overall optical performances by a chemical scissors strategy.