二个含N-取代水杨基Schiff碱配体的镍配合物的合成和晶体结构

合成了二个N-取代水杨基Schiff碱的Ni(Ⅱ)配合物[Ni₂(dsh)(C₅H₅N)₆]·2C₅H₅N (H₄dsh=1，2-disalicyloylhydrazine) (1)和Ni(spmbh)(C₅H₅N) (H₂spmbh=N-salicylaldehyde-N-(4-methoxybenzoyl) hydrazone) (2)。化合物1：单斜晶系，P2₁/c空间群，a=1.274 74(5) nm，b=1.646 31(7) nm，c=1.199 59(5) nm，β=103.344(1)°，V=2.449 5(2) nm³，Z=2，D_c=1.381 g·cm^-3，M_r=1 018.44，μ=0.826 mm^-1，F(000)=1 060，R=0.033 1，wR=0.073 3；化合物2：单斜晶系，P2₁/c空间群，a=1.096 74(8) nm，b=0.946 44(6) nm，c=1.725 7(1) nm，β=91.006(4)°，V=1.791 0(2) nm³，Z=4，D_c=1.506 g·cm^-3，M_r=406.08，μ=1.109 mm^-1，F(000)=840，R=0.031 7，wR=0.049 0。具有晶体学中心对称性的双核镍化合物1中，1，2-二水杨酰基肼通过肼基N-N单键桥联二个Ni(Ⅱ)原子，Ni…Ni原子间距为0.468 83(4) nm，每个Ni(Ⅱ)原子具有轴向伸长的八面体配位构型。化合物2中，Ni(Ⅱ)原子具有平面正方形的配位构型。     

某些稀土硝酸盐与N,N-二亚水杨基乙二胺-二甲基亚砜三元配合物的合成和晶体结构

合成了Tb(Ⅲ)、Y(Ⅲ)、Nd(Ⅲ)硝酸盐与N,N-二亚水杨基乙二胺、二甲基亚观的配合物[RE(C₆H₄OHCHNC₂H₄NCHC₆H₄OH)(NO₃)₃(CH₃SOCH₃)］.Tb(Ⅲ)配合物晶体为单斜晶系,空间群P2₁/n,a=0.9628(3)nm,b=1.6439(4)nm,C=1.6256(2)nm,β=102.78(2)°,V=2.509(2)nm₃,D_x=1.830g/cm³,Z=4,μ=2.996mm^-1,F(000)=1368,R=0.043,R_w=0.046.Tb(Ⅲ)的配位数是9,配位几何为单帽四方反核柱.所有的配位原子都是氧原子.两个中心离子被双Schiff碱桥联,形成一维无限长链.     

一种新型苯并噻唑衍生物的合成、晶体结构及其倍频效应

以4-乙基（2-羟乙基）氨基）苯甲醛和2-氨基苯硫酚为原料,在乙醇中经回流反应合成了一种新型苯并噻唑衍生物（Cy-B）,其结构经¹H NMR, ¹³C NMR, IR, HR-MS(ESI),元素分析和X-射线单晶衍射表征。并研究了Cy-B的光物理性质。结果表明：在1 064 nm激光作用下,Cy-B表现出激光倍频效应;样品晶体尺寸越小,倍频效应越强,且晶体尺寸为61~90 μm时产生的倍频效应是参比（磷酸二氢钾）强度的3.45倍、α-SiO₂强度的155.73倍。     

四磺基苯基卟啉的表面增强拉曼效应

以三电极电池系统在不同电位下的在位测量测得四磺基苯基卟啉钠水溶液（浓度为５×１０＾－５ｍｏｌ／Ｌ）的表面增强拉曼谱。结果表明，在接近第一还原态电位处对吸附分子活化后，可得到较大倍数的增强信号（１０＾７数量级）。对照简正坐标计量结果，发现与Ｎ原子有关的振动模式有较大的增强，在此基础上提出了增强机理。     

N,N''''-亚水杨基喹哪啶酰肼合锰(Ⅱ)的晶体结构和非线性光学性质

合成了N,N'-亚水杨基喹哪啶酰肼(sqnhz)及其锰配合物[Mn(sqnhz)2]sqnhz(C51H39Cl2MnN9O6,Mr=999.75).X射线衍射实验结果表明标题配合物晶体属于三斜晶系,空间群为P1;晶体学参数a=0.772 3(1)nm,b=1.153 7(3)nm,c=1.354 9(2)nm,α=74.387(8)°,β=83.342(6)°,γ=80.967(9)°,V=1.144 8(4)nm3,Z=1,Dc=1.450 mg/m3,F(000)=515,μ(Mo-Kα)=0.468 mm-1,R=0.060 6,Rw=0.115 2.在配合物[Mn(sqnhz)2]中,锰(Ⅱ)原子具有扭曲的八面体配位构型,晶体通过分子间氢键作用形成一维无限链状结构.红外光谱表明,配体在形成配合物后,v(C=O)和v(C=N)红移.电子光谱表明存在π-π*和d-π*的跃迁,荧光光谱表明,配合物金属对配体n-π*激发引起的荧光发射峰有较大的影响,配合物对于λ=0.106 nm激光倍频系数I2w/I2ω,(KDP)为0.94.     

ⅡB族金属卤化物与有机分子加成物的倍频性能和晶体结构研究的进展

某些具有倍频活性的有机分子如硫脲和３－甲基－４－硝基吡啶Ｎ－氧等易与ⅡＢ族金属卤化物形成加合物，并呈非心对称晶体结构和有希望非线性光学材料。本文着重总结这些加成物特别是一维配位聚合物的结构特征和倍频性能并展望其研究前景。     

N，N′-亚水杨基喹哪啶酰肼合锰（Ⅱ）的晶体结构和非线性光学性质

合成了N,N′-亚水杨基喹哪啶酰肼(sqnhz)及其锰配合物[Mn(sqnhz)2]sqnhz(C51H39Cl2MnN9O6,Mr=999 75).X射线衍射实验结果表明:标题配合物晶体属于三斜晶系,空间群为P1;晶体学参数:a=0.7723(1)nm,b=1.1537(3)nm,c=1.3549(2)nm,α=74 387(8)°,β=83 342(6)°,γ=80 967(9)°,V=1 1448(4)nm3,Z=1,Dc=1 450mg/m3,F(000)=515,μ(Mo-Kα)=0.468mm-1,R=0 0606,Rw=0 1152.在配合物[Mn(sqnhz)2]中,锰(Ⅱ)原子具有扭曲的八面体配位构型,晶体通过分子间氢键作用形成一维无限链状结构.红外光谱表明,配体在形成配合物后,ν(CO)和ν(CN)红移.电子光谱表明存在π-π 和d-π 的跃迁,荧光光谱表明,配合物金属对配体n-π 激发引起的荧光发射峰有较大的影响,配合物对于λ=0.106nm激光倍频系数I2ω/I2ω(KDP)为0 94.     

功能金属碘酸盐的结构与性能

金属碘酸盐由于含有处于不对称配位环境和孤对电子的碘(V)离子可形成丰富奇特的结构,其中不少化合物是潜在的新型二阶非线性光学材料.它们的透过波段宽、倍频系数大、损伤阈值高而且热稳定性良好.本文总结了金属碘酸盐的结构与性能.将d0过渡金属复合到碘酸盐中可得到很多新颖结构的金属碘酸盐,其抗衡阳离子包括碱金属、碱土金属和稀土元素.由于两种不对称结构单元极化作用的叠加,它们中许多化合物具有非中心对称结构并表现出优良的二阶非线性光学性能.一些稀土碘酸盐在可见或近红外区有很强的荧光.如果碘酸根的孤对电子能排列适当,电子结构为dn(n≠0)的过渡金属与碘酸盐的复合也可得到非中心对称结构的化合物.这些dn过渡金属通常具有八面体或四方平面配位环境.此外两种不同孤对电子阳离子的复合也是设计新倍频材料的一条有效策略.     

水杨基萤光酮荧光熄灭法测定微量钨

本文用荧光熄灭法研究了水杨基荧光酮(SAF)-溴化十六烷基三甲胺(CTMAB)-W(VI)体系的测定方法及条件。在pH1.2～3.5的硫酸介质中,检测限为0.1μg/25ml,在0.1～2.5μg/25ml范围内具有线性关系。本法灵敏度高,选择性好,用于检测合金钢中钨,结果满意。     

非线性光学环氧聚合物的近程结构对二次谐波产生弛豫特性的影响

设计合成了三种具有不同主链化学结构的二阶非线性光学功能化环氧聚合物,并对其化学结构进行了表征,考察了聚合物近程结构对材料极化后二次谐波产生弛豫特性的影响。极化后线型聚合物链节的扭转弹性回复是二次谐波产生弛豫的主要原因,在温度处于Ｔｇ 以下或Ｔｇ 附近时玻璃化转变温度的高低决定了二次谐波产生弛豫的快慢;聚合物交联后有助于提高二次谐波产生的稳定性,但此时聚合物单个链节结构的柔顺性成为影响二次谐波产生弛豫的主要原因,刚性越大,材料将具有更稳定的二次谐波产生性能。极化聚合物的二次谐波产生弛豫过程非常复杂,需要综合考虑聚合物材料的近程和远程结构因素。     

Second Harmonic Generation Signatures of Supramolecular Assemblies Based on Amide Moieties

Targeting the use of the second harmonic generation (SHG) as a bioimaging technique to unravel the formation of aggregates, the SHG first hyperpolarizabilities ( ) of assemblies of benzene-1,3,5-tricarboxamide derivatives have been evaluated at the density functional theory level. Calculations have revealed that i) the assemblies exhibit SHG responses and the total first hyperpolarizability responses of the aggregates are evolving with their size. The largest aggregation effect is a 18-times increase for of B4 when going from the monomer to the pentamer, that ii) the intrinsic SHG responses described by the hyper-Rayleigh Scattering are enhanced in presence of iodine atoms on the phenyl core, that iii) the side chains affect the relative orientation of the dipole moment and first hyperpolarizability vectors, which impacts more the EFISHG quantities than their moduli, and that iv) the radial component to is dominant for the compounds having the largest responses. These results have been obtained using the sequential molecular dynamics then quantum mechanics approach to account for dynamic structural effects on the SHG responses.     

Stuffed Tridymite Structures: Synthesis,Structure, Second Harmonic Generation,Optical, and Multiferroic Properties

The stuffed tridymite structure Ba(Zn/Co)_1−xSi_1−xM_2xO₄ (M=Al³⁺ and Fe³⁺) is explored for the possible multiferroic behavior and to develop new inorganic colored materials. The compounds were synthesized by employing conventional solid-state chemistry methods in the temperature range 1100–1175 °C for 24 h. The powder X-ray diffraction (PXRD) and Rietveld refinement studies indicate that the compounds stabilize in the P63 space group (no. 173). The refinement results were also rationalized by employing Raman spectroscopic studies. The compounds were found to be second harmonic generation (SHG) active and show weak ferroelectric behavior. The co-substitution of Co²⁺ and Fe³⁺ in the structure gives rise to a weak ferromagnetic behavior to the compound, BaCo_0.75Si_0.75Fe_0.5O₄, making it a multiferroic material. The optical studies on the prepared compounds exhibited blue color (Co²⁺ in T_d geometry), purple color (Ni²⁺ in T_d geometry), and simultaneous substitution of Co²⁺ and Fe³⁺ gives rise to blue-green color owing to metal-to-metal charge transfer (MMCT) effect.     

用激光第二谐振光研究阴离子在多晶铜电极表面上的吸附

首次用激光产生的第二谐振光(SHG)检测到金属/水溶液界面上阴离子在多晶铜电极表面上的吸附,阴离子吸附特性对SHG强度影响明显,由多晶铜电极在(0.5-x)mol/L NaClO_4+xmol/L NaBr溶液中的SHG强度-电位曲线表明铜电极表面对ClO_4~-的吸附非常弱,对Br~-有特定的吸附,SHG强度随Br~-浓度增加而增强,结果表明SHG是定量研究电化学界面区吸附特性的灵敏有效的探针,可揭示金属与吸附质间相互作用的本质。     

Optical Second Harmonic Generation and Relaxation Dynamics of Aligned Azo-Dyes in Sol-Gel Derived Organic-Inorganic Film

An Azo-dye doped organic-inorganic hybrid film was prepared by the sol-gel technique, and optical second-harmonic (SH) nonlinearities were measured as a function of the poling conditions. Azo-dye molecules dispersed in poly-vinylpyrrolidone were complexed with the hydrolyzed silicon-alkoxide. The Maker-fringe pattern composed of a fine oscillating pattern on a broad component, and the highest second-order nonlinear coefficient, d ₃₃, was 0.83 pm/V when poled at 175°C and 4 kV. The analysis of the decay curves of the SH intensities at 150–190°C predicted the relaxation time of about 3 years at room temperature.     

Combined Second Harmonic Generation and Fluorescence Analyses of the Structures and Dynamics of Molecules on Lipids Using Dual-Probes: A Review

Revealing the structures and dynamic behaviors of molecules on lipids is crucial for understanding the mechanism behind the biophysical processes, such as the preparation and application of drug delivery vesicles. Second harmonic generation (SHG) has been developed as a powerful tool to investigate the molecules on various lipid membranes, benefiting from its natural property of interface selectivity, which comes from the principle of even order nonlinear optics. Fluorescence emission, which is in principle not interface selective but varies with the chemical environment where the chromophores locate, can reveal the dynamics of molecules on lipids. In this contribution, we review some examples, which are mainly from our recent works focusing on the application of combined spectroscopic methods, i.e., SHG and two-photon fluorescence (TPF), in studying the dynamic behaviors of several dyes or drugs on lipids and surfactants. This review demonstrates that molecules with both SHG and TPF efficiencies may be used as intrinsic dual-probes in plotting a clear physical picture of their own behaviors, as well as the dynamics of other molecules, on lipid membranes.     

Conserved Hydrogen Bonded Tartrate Frameworks: Inclusion of Amines and Implications for Second Harmonic Generation

A series of anilinium cations with various functional groups as substituents has been chosen to form salts with l-tartaric acid and d-dibenzoyl tartaric acid. The salts show second harmonic generation activities comparable to urea. The tartrate frameworks provide conformationally rigid hydrogen bonded frameworks for the incorporation of these cations. The SHG activity of these salts appear to depend upon the type of framework provided by the tartrate anions, which in turn decides the orientation of the cations.     

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

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.     

A Promising Fluorooxoborate Framework with Flexibile Capability for Diverse Cations to Enhance the Second Harmonic Generation

Fluorooxoborates as potential deep ultraviolet (DUV) nonlinear optical (NLO) materials have exhibited diverse structures and NLO properties with metal cationic changes. Herein, the general mechanisms of metal cations on band gaps and optical properties in a series of typical fluorooxoborates have been clarified. It reveals that the framework of the emblematic 18-membered ring oxyfluorides has the flexibility of being able to contain different cations spanning from alkali to d¹⁰ metals by investigating the stability of the artificial CdB₅O₇F₃ structure. Besides, introducing d¹⁰ metal cations can enhance the second harmonic generation (3.1×KH₂PO₄ (KDP), d₃₆=0.39 pm V⁻¹) and also keep a DUV spectral transparency (E_g>6.2 eV). Thus, the d¹⁰-containing fluorooxoborate exhibits a great potential to be a new DUV optical material for nonlinear light-matter interactions.     

N原子对取代NH_4H_2PO_4盐类晶体的二次谐波发生的影响(英文)

从N—H键在取代NH4H2 PO4盐的 [AH]4 [H2 PO4]类晶体中的突出作用出发 ,作者对几个 [AH]4 [H2 PO4]型晶体的二次谐波发生进行理论上的研究 (这里A =伯、仲、叔胺 )。并对这一类晶体的二次谐波发生和其亚结构单元 [AH]+ 中N原子上的净电荷之间的依赖关系进行了估计。