title: Pb2 BO3 Cl: A Tailor-Made Polar Lead Borate Chloride with Very Strong Second Harmonic Generation.
abstract: A meticulously designed, polar, non-centrosymmetric lead borate chloride, Pb2 BO3 Cl, was synthesized using KBe2 BO3 F2 (KBBF) as a model. Single-crystal X-ray diffraction revealed that the structure of Pb2 BO3 Cl consists of cationic [Pb2 (BO3 )](+) honeycomb layers and Cl(-) anions. Powder second harmonic generation (SHG) measurements on graded polycrystalline Pb2 BO3 Cl indicated that the title compound is phase-matchable (type I) and exhibits a remarkably strong SHG response, which is approximately nine times stronger than that of potassium dihydrogen phosphate, and the largest efficiency observed in materials with structures similar to KBBF. Further characterization suggested that the compound melts congruently at high temperature and has a wide transparency window from the near-UV to the mid-IR region.
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul, 06974, Republic of Korea.
authors.forename: Guohong
authors.initials: G
authors.lastname: Zou
authors.affiliation: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
authors.forename: Chensheng
authors.initials: C
authors.lastname: Lin
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul, 06974, Republic of Korea.
authors.forename: Hongil
authors.initials: H
authors.lastname: Jo
authors.affiliation: Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.
authors.forename: Gnu
authors.initials: G
authors.lastname: Nam
authors.affiliation: Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.
authors.forename: Tae-Soo
authors.initials: TS
authors.lastname: You
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul, 06974, Republic of Korea. kmok@cau.ac.kr.
authors.forename: Kang Min
authors.identifier: 0000-0002-7195-9089
authors.initials: KM
authors.lastname: Ok
keywords: X-ray diffraction; crystal engineering; lead borate chloride; nonlinear optical properties; second harmonic generation