基于咪唑基配体的Mn(Ⅱ)配合物的水热合成及结构、理论计算和三阶非线性光学性质

在水热条件下用氯化锰和咪唑基配体合成了配合物Mn[（IPB）₂Cl₂]·4H₂O（IPB=4-（1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl）benzaldehyde）,并通过元素分析、红外光谱、紫外衍射、X射线单晶衍射法和Z-扫描技术对其结构和性质进行了表征。X射线单晶衍射结果表明,该化合物晶体属正交晶系,空间群Pnna。采用Z-扫描技术测量了该化合物的非线性光学特性,结果显示,以45 μJ的脉冲能量,在焦点处的透光率为93%,非线性吸收系数为-4.5×10^-11 m·W^-1,非线性折射率为1.0×10^-19 m²·W^-1。该化合物显示了自聚焦的性质。在紫外-可见光谱区,该化合物的最大吸收波长为282nm。     

硒化镉载流子的超快动力学研究

硒化镉是一种可用于X射线全光分幅相机和全光条纹相机的重要探测材料。用基于相位物体的泵浦探测方式,研究了硒化镉在1030nm波长,飞秒脉冲下的载流子超快动力学和非线性光学特性。得到了双光子吸收系数、载流子吸收截面、载流子复合时间等参数。实验表明,硒化镉载流子的动力学和非线性特性是由束缚电子和载流子共同决定的。束缚电子的克尔效应和双光子激发都是瞬态的,而载流子复合持续了较长时间。这些参数和载流子图像的的获得,为X射线超快探测器件的设计和改进提供了参考。     

含2，2′-联吡啶配体簇合物的合成、晶体结构及非线性光学性质

The Cluster compound [Cu₃BrWOS₃(bipy)₂] was synthesized by reaction of (NH₄)₂WOS₃， CuBr， 2，2′- bipyridine and n-Bu₄NBr at room temperature and characterized by IR， UV and elemental analyses. The structure of [Cu₃BrWOS₃(bipy)₂] was determined by single crystal X-ray diffraction revealing that the cluster consist of a nest -shaped core. The W atom is tetrahedrally coordinated by three S atoms and one O atom. There are two types of copper atoms in the WOS₃Cu₃ aggregate： two copper atoms are tetrahedrally coordinated and another copper atom is trigonally coordinated. The nonlinear optical properties were studied with an 8ns pulsed laser at 532nm. Its optical responses to the incident light exhibit considerably optical absorptive and strong self-focusing effect with α₂=0.90×10^-10m·W^-1， n₂=2.72×10^-18m²·W^-1. CCDC： 196348.     

Simple measurement of nonlinear refraction by using a single pulse and beam

A very simple technique, by which both the magnitude and the sign of nonlinear refraction can be determined through using only one single pulse and beam with a phase object, is presented. Using this technique, only the transmittance of an aperture in the far field is investigated. We study the nonlinear refraction of the carbon disulfide by using the presented technique with 21~ps pulses at a wavelength of 532~nm as a test.     

C60／PMMA的单重态激光发态吸收光限幅研究

研究了Ｃ６０／ＰＭＭＡ对波长５３２ｎｍ，脉冲宽度为２１ｐｓ的脉冲激光的限幅特性，并应用三能级模型进行了理论模拟。结果表明光限幅起源于单重态发态吸收。     

基于咪唑基配体的Mn(Ⅱ)配合物的水热合成及结构、理论计算和三阶非线性光学性质

在水热条件下用氯化锰和咪唑基配体合成了配合物Mn[（IPB）₂Cl₂]·4H₂O （IPB=4-（1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl） benzaldehyde）,并通过元素分析、红外光谱、紫外衍射、X射线单晶衍射法和Z-扫描技术对其结构和性质进行了表征。X射线单晶衍射结果表明,该化合物晶体属正交晶系,空间群Pnna。采用Z-扫描技术测量了该化合物的非线性光学特性,结果显示,以45 μJ的脉冲能量,在焦点处的透光率为93%,非线性吸收系数为-4.5×10^-11 m·W^-1,非线性折射率为1.0×10^-19 m²·W^-1。该化合物显示了自聚焦的性质。在紫外-可见光谱区,该化合物的最大吸收波长为282nm。     

Structure and Nonlinear Optical Property of the Cluster Compound V_2S_6O_2Cu_6（3-MePy）_6

A cluster compound V2S6O2Cu6(3-MePy)6(3-MePy = 3-methyl pyridine) has been synthesized by using skiving method and the crystal structure was characterized by X-raydiffraction: space group P1, Z = 1, a = 9.7278(4), b = 10.4180(5), c = 11.9230(6) , α = 108.240(3), β = 98.120(2), γ = 99.500(2)o, R = 0.052 and wR = 0.104. The NLO properties were studied by Z-scan technique with 8 ns pulsed laser at 532 nm. The cluster exhibits strong NLO absorptive ability(α2 = 1.7 × 10–10 m·W–1) and effective self-focusing performance(n2 = 1.27×10–18 m2·W–1) in a 1.58 × 10–4 mol·dm–3 DMF solution.     

一个多酸簇合物[Cu4(PPh3)6][Mo8O26]的合成、晶体结构和非线性光学性质

本文报道了一个多酸簇合物[Cu4(PPh3)6][Mo8O26]的合成、X-射线单晶结构分析及IR、XRD表征.单品结构表明中心对称的[Mo8O26]4-是由8个共边的MoO6八面体组成.该化合物具有较好的三阶非线性光学性质,其三阶非线性吸收和折射系数分别为12.9×10-11 MKS和3.13×10-11 esu.     

六棱柱型金属团簇化合物W2Ag4S8(dppy)4的纳秒光限幅特性

新合成了一种金属团簇化合物W2Ag4S8(dppy)4,(分子式为C68H56Ag4N4P4S8W2)并用X-射线单晶衍射结构分析方法测定了其晶体结构.单晶X-射线衍射数据表明这种金属团簇化合物具有六棱柱型.在纳秒激光脉冲作用下研究了W2Ag4S8(dppy)4的二甲基甲酰胺(DMF)溶液的光限幅特性.实验结果表明W2Ag4S8(dppy)4的DMF溶液在放置一段时间后光限幅特性明显优于新配制的DMF溶液,其光限幅特性明显强于C60甲苯溶液,表现出其具有较强的光限幅特性.为了研究W2Ag4S8(dppy)4的光限幅机制及光限幅特性在放置一段时间后发生变化的原因,又做了非线性散射和泵浦探测实验,并对其光限幅机制和光限幅特性在放置一段时间后发生变化的原因进行了分析.     

OPTICAL LIMITING EFFECT IN TWO PHTHALOCYANINES OBSERVED BY PICOSECOND PULSED LASER

Optical limiting (OL) properties of two phthalocyanines were investigated by using picosecond laser pulses at 532nm. The relative ratios k of the absorption cross section of the first singlet excited state to that of the ground state were approximately obtained by the analysis of the experimental results in which the reverse saturable absorption model of the three-energy-level scheme was employed. A significant comparison with fullerene C₆₀ was presented for OL. The OL mechanisms have been analysed in detail.