Pb₂BO₃Cl: A Tailor-Made Polar Lead Borate Chloride with Very Strong Second Harmonic Generation

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• 作者：Dr. Guohong Zou ; Dr. Chensheng Lin ; Hongil Jo ; Gnu Nam ; Prof. Dr. Tae-Soo You and Prof. Dr. Kang Min Ok
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：September 19, 2016
• 年：2016
• 卷：128
• 期：39
• 页码：12257-12261
• 全文大小：2562K
• ISSN：1521-3757

文摘

A meticulously designed, polar, non-centrosymmetric lead borate chloride, Pb₂BO₃Cl, was synthesized using KBe₂BO₃F₂ (KBBF) as a model. Single-crystal X-ray diffraction revealed that the structure of Pb₂BO₃Cl consists of cationic [Pb₂(BO₃)]⁺ honeycomb layers and Cl⁻ anions. Powder second harmonic generation (SHG) measurements on graded polycrystalline Pb₂BO₃Cl 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.