Explorations of New Second-Order Nonlinear Optical Materials in the Ternary Rubidium Iodate System: Noncentrosymmetric beta-RbIO3(HIO3)(2) and Centrosymmetric Rb-3(IO3)(3)(I2O5)(HIO3)(4)(H2O)
Explorations of New Second-Order Nonlinear Optical Materials in the Ternary Rubidium Iodate System: Noncentrosymmetric beta-RbIO3(HIO3)(2) and Centrosymmetric Rb-3(IO3)(3)(I2O5)(HIO3)(4)(H2O)
复制标题
三元碘酸铷体系中新型二阶非线性光学材料的探索：非中心对称β-RbIO3(HIO3)(2)和中心对称Rb-3(IO3)(3)(I2O5)(HIO3)(4)(H2O)
DOI：
10.1021/ic4028942
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发表时间：
2014
影响因子：
4.6
通讯作者：
Mao Jiang-Gao
中科院分区：
文献类型：
--
作者：
Xu Xiang;Yang Bing-Ping;Huang Chao;Mao Jiang-Gao
采用水热法合成了两种新的碘酸铷化合物：β-RbIO_3（HIO_3）_2（1，P_1）和Rb_3（IO_3）_3（I_2O_5）（HIO_3）_4（H_2O）（2，P_21/c），并用X射线单晶衍射法测定了它们的晶体结构。化合物1具有IO 3-阴离子和中性HIO 3分子，它们通过Rb+阳离子相互连接成三维结构。化合物2的结构为二维层状结构，由IO 3-阴离子、中性HIO 3和二聚I2 O 5分子通过Rb+阳离子相互连接而成。生长出了尺寸为几毫米的大块晶体。对1的抛光晶体板的UV-vis-NIR透射光谱测量表明，该晶体具有在305 nm处开始的短波长吸收边。粉末二次谐波产生（SHG）的测量结果显示，1是一种I型相位匹配材料的SHG响应约为1.5倍的KH 2 PO 4。在激光波长为1064 nm、脉宽为10 ns的条件下，测得晶体的维氏硬度为110 HV，激光损伤阈值为18.26 J/cm 2。此外，还研究了1和2的热稳定性和振动光谱。
Two new rubidium iodates, namely, β-RbIO3(HIO3)2(1,P1) and Rb3(IO3)3(I2O5)(HIO3)4(H2O) (2,P21/c), have been synthesized by hydrothermal reaction and their structures determined by single-crystal X-ray diffraction. Compound1exhibits IO3–anions and neutral HIO3molecules which are interconnected by Rb+cations into three-dimensional structure. Compound2features a two-dimensional layered structure formed by IO3–anions and neutral HIO3and dimeric I2O5molecules interconnected by Rb+cations. Large bulk crystal of1with dimensions of several millimeters has been grown. UV–vis–NIR transmission spectroscopy measurements on a slab of a polished crystal of1indicated that the crystal possesses a short-wavelength absorption edge onset at 305 nm. Powder second-harmonic generation (SHG) measurements on sieved crystals revealed that1is a type I phase-matchable material with an SHG response about 1.5 times that of KH2PO4. The Vickers hardness of crystal of1has been measured to be 110 HV, and the laser-induced damage threshold has been confirmed to be 18.26 J/cm2with a laser wavelength of 1064 nm and a pulse duration of 10 ns. Moreover, thermal stabilities and vibrational spectra for both1and2have also been studied.