A facile synthesis of two new IR optical perovskites based on 1,4-diazabicyclo[2,2,2]octane with a high laser damage threshold

• Published in: Dalton transactions : an international journal of inorganic chemistry 2018-10, Vol.47 (41), p.14497-1452
• Main Authors: Song, Jun-Ling, Chen, Wen-Jun, Chu, Kai-Bin, Zhou, Yu-Hua
• Format: Article
• Language: English
• Subjects: Crystallography; Fourier transforms; Laser damage; Lasers; Perovskites; Potassium phosphates; Silver gallium sulfide; Structural damage
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c8dt03047b

The main commercial infrared nonlinear optical (IR NLO) crystals, typically, AgGaS 2 , have some inherent disadvantages, for example, low laser damage threshold (LDT) or relatively poor stability, which limit their wide application. Here, we discover two new IR optical perovskites based on 1,4-diazabicyclo[2,2,2]octane, namely, (H 2 dabco)(PbCl 3 ) 2 ( 1 ) and (H 2 dabco)(H 2 PbBr 6 )·H 2 O ( 2 ). 1 and 2 crystallize in the noncentrosymmetric space groups P 4 3 2 1 2 and P 6 3 mc , respectively, displaying a broad transparent range with high transmission. Particularly, compound 2 exhibits a moderate SHG response of 1.8 times that of KH 2 PO 4 (KDP) at 1064 nm with a high laser-induced damage threshold of 328.8 MW cm −2 , indicating that it is a new promising NLO material. Two new IR optical perovskites based on 1,4-diazabicyclo[2,2,2]octane, namely, (H 2 dabco)(PbCl 3 ) 2 ( 1 ) and (H 2 dabco)(H 2 PbBr 6 )·H 2 O ( 2 ), were discovered and they both crystallize in the noncentrosymmetric space group P 4 3 2 1 2 and P 6 3 mc, respectively, displaying broad transparent range with high transmission.