CsVO2F(IO3): An Excellent SHG Material Featuring an Unprecedented 3D [VO2F(IO3)]− Anionic Framework

• Published in: Angewandte Chemie International Edition Vol. 59; no. 13; pp. 5381 - 5384
• Main Authors: Chen, Jin, Hu, Chun‐Li, Zhang, Xiao‐Han, Li, Bing‐Xuan, Yang, Bing‐Ping, Mao, Jiang‐Gao
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 23.03.2020
• Edition: International ed. in English
• Subjects: 3D cationic frameworks; Alkali metals; Anions; Crystal structure; Crystals; Dimensional stability; Fluorides; Harmonic generations; Laser damage; Laser radiation; Polyanions; Polyelectrolytes; Potassium titanyl orthophosphate; Radiation damage; SHG materials; theoretical calculations; Vanadium; vanadium oxide-fluoride; Yield point
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.202000587

The first alkali‐metal vanadium iodate fluoride, CsVO2F(IO3), with a novel 3D anionic framework, has been rationally designed and hydrothermally synthesized. The 3D [VO2F(IO3)]− framework in CsVO2F(IO3) is built from 0D Λ‐shaped cis‐[VO3F(IO3)2]4− polyanions via corner‐sharing of oxo anions and bridging of the iodate groups. CsVO2F(IO3) displays both a strong second‐harmonic generation (SHG) 1.1 times as strong as KTiOPO4 (KTP) under 2.05 μm laser radiation and high laser‐induced damage threshold (LIDT) of 107.9 MW cm−2. This work provides a new route to design SHG crystals with stable 3D anionic structures from low‐dimensional structural building units. From zero to threero: CsVO2F(IO3) is the first example of a 3D [VO2F(IO3)]− anionic framework built from 0D Λ‐shaped cis‐[VO3F(IO3)2]4− units. The system shows a strong second‐harmonic generation (SHG), 1.1 times as strong as KTiOPO4 under 2.05 μm laser radiation and a high laser‐induced damage threshold of 107.9 MW cm−2.