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• 作者：Sheng-Ping Guo ; Guo-Cong Guo ; Ming-Sheng Wang ; Jian-Ping Zou ; Gang Xu ; Guo-Jian Wang ; Xi-Fa Long ; Jin-Shun Huang
• 刊名：Inorganic Chemistry
• 出版年：2009
• 出版时间：August 3, 2009
• 年：2009
• 卷：48
• 期：15
• 页码：7059-7065
• 全文大小：771K
• 年卷期：v.48,no.15(August 3, 2009)
• ISSN：1520-510X

文摘

Four new quaternary isostructural rare-earth thiosilicates, ZnY₆Si₂S₁₄ (1), Al_0.50Dy₃(Si_0.50Al_0.50)S₇ (2), Al_0.38Dy₃(Si_0.85Al_0.15)S₇ (3), and Al_0.33Sm₃SiS₇ (4), crystallized in the chiral and polar space group P6₃, have been prepared by a facile synthetic routine. Compounds 1−3 show strong second harmonic generation effects at 2.1 um with the intensities of 1, 2, and 3 being about 2, 2, and 1 times that of KTP (KTiOPO₄), respectively. The calculated band structure of 1 implies that the optical absorptions of BLn₆M₂Q₁₄ and ALn₃MQ₇ family compounds are mainly ascribed to the charge transitions from Q−p to Ln−4f (4d for Y) states. Compounds 2−4 exhibit antiferromagnetic-like interactions.