共查询到18条相似文献,搜索用时 78 毫秒
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原子簇化合物的固相合成及其三阶非线性光学性质的研究 总被引:2,自引:0,他引:2
在戴安邦教授的指导下 ,我们实验室多年来在室温、近室温条件下采用固相反应法合成了一系列原子簇化合物 ,本文则对用此方法合成的Mo(W ) /S/Cu(Ag)原子簇化合物进行了分类和总结 ,并探讨了固相反应合成原子簇化合物的成簇规律和成簇机理。同时本文还概括和总结了Mo(W ) /S/Cu(Ag)原子簇化合物的光限制效应 ,三阶非线性吸收与非线性折射等光学性质 ,初步探讨了Mo(W ) /S/Cu(Ag)原子簇化合物的结构与光学性质之间的关系 相似文献
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天然环状四吡咯化合物包括卟啉、卟吩、细菌卟吩、异菌卟吩以及可啉等类物质,其合成研究是目前有机合成领域的热点之一,综述了上述各类物质的全合成方法及其研究进展。 相似文献
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酞菁锌的电子光谱和三阶非线性光学性质 总被引:2,自引:0,他引:2
用INDO/SDCI方法研究了酞菁锌的电子结构,紫外-可见光谱,三阶三线性光学系数及其色散效应。发现由于酞菁锌中Zn(Ⅱ)对γ的贡献很小使酞菁锌与酞菁的<γ>几乎相等。根据我们的计算结构对此进行了合理的解释。 相似文献
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中心对称吡嗪衍生物电子光谱和三阶非线性光学性质的理论计算研究 总被引:4,自引:1,他引:4
采用量子化学abinitio HF和半经验ZINDO-SOS方法计算了吡嗪及其衍生物的电子光谱和三阶非线性光学系数.结果表明,中心对称的吡嗪衍生物随着体系共轭链的增长,最大吸收谱线波长增大,前线轨道能级差减小,体系的三阶非线性光学系数增大;引入取代基后可改变其三阶非线性光学性质.在相同骨架中引入吸电子基团-NO2形成A-π-A共轭结构,其三阶非线性光学系数比引入供电子基-NH2的体系大. 相似文献
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卟啉镍的电子结构及三阶非线性光学性质 总被引:1,自引:1,他引:1
用INDO/SDCI法研完了卟啉镍的电子结构、UV光谱和三阶非线性光学系数γ,发现该化合物中镍离子对γ的贡献很小,而卟啉环对γ的贡献则是主要的,且三阶非线性极化系数随配体共轭键数目的增加成指数增长. 相似文献
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合成了两种新的金属双噻吩类复合物:(苄基三乙基铵)双(1,3-二硫杂环戊烯-2-硫酮-4,5-二巯基)-金(BTEAADT)和(苄基三乙基铵)双(1,3-二硫杂环戊烯-2-硫酮-4,5-二巯基)-镍(BTEANDT).采用Z扫描方法,在皮秒脉冲下,分别测试了两种材料的乙腈溶液在532和1064nm的三阶非线性光学特性.Z扫描的结果表明,BTEAADT的乙腈溶液在532nm具有反饱和吸收效应,在1064nm非线性吸收效应可以忽略且在两种波长都有自散焦效应,三阶非线性折射率为负值.BTEANDT的乙腈溶液在532nm非线性吸收效应可以忽略,在1064nm具有饱和吸收效应且在两种波长都有自聚焦效应,三阶非线性折射率为正值.分析了造成这种差异的原因.经过计算得到了两种材料在532和1064nm的三阶非线性折射率,三阶非线性吸收系数,三阶非线性极化率和超极化率.BETAADT的非线性折射率在532nm为-1.685×10-18m2·W-1,在1064nm为-1.459×10-18m2·W-1;BTEANDT的非线性折射率在532nm为1.452×10-18m2·W-1,在1064nm为7.311×10-18m2·W-1.两种材料的三阶非线性吸收系数,三阶非线性极化率和超极化率的数量级分别是10-11m·W-1,10-13esu和10-31esu.结果表明这两种材料在非线性光学领域有潜在的应用价值. 相似文献
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Yuzhen Zhao Zhenhua Li Qing Li Yang Zhao Ruijuan Yao Cheng Ma Yongming Zhang Dong Wang 《Molecules (Basel, Switzerland)》2022,27(15)
A high-yielding click reaction was used to synthesize a series of highly conjugated, symmetrical, as well as asymmetrical compounds with a benzene core. Cyclic voltammetry and ultraviolet/visible absorption spectroscopy were carried out, and proved that the side groups of the benzene derivatives played an important role in the energy gaps, and affected the third-order non-linear optical response. The maximum absorption wavelength of the series of benzene derivatives showed an obvious red-shift. Moreover, the addition of resilient electron-withdrawing groups significantly narrowed the energy levels as compared with precursors. The third-order nonlinear properties of this benzene derivative were tested by the Z-scan technique. The expected properties of this series of molecules were obtained, and it was found that the series of molecules undergoes a transition from reverse saturable absorption to saturable absorption, which has certain reference significance for a nonlinear optical field. 相似文献
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以氯化4-甲基-N-9-亚甲基蒽吡啶盐为原料,合成了一种新型的苯乙烯吡啶盐,通过红外、核磁共振氢谱、碳谱、电喷雾质谱、单晶X射线衍射等测试技术对化合物的结构进行了表征。单晶X射线衍射结果表明,该化合物属于单斜晶系,空间群为P21/c,晶胞参数a=1.255 7(1)nm,b=1.539(1)nm,c=2.220 2(8)nm,β=101.099(1)°,V=4.210 5(4)nm3,Z=4,Dc=1.159 g/cm3。用1 064 nm皮秒脉冲激光研究其三阶非线性光学特性,双光子吸收系数β=0.028 cm/GW,吸收截面为σ=8.68×10-48cm4.s.photon-1,表明目标化合物具有良好的三阶非线性光学性质。 相似文献
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Chen Cao Shu-Jin Bao Dr. Xiao-Yan Tang Ze-Ming Xu Chun-Yan Ni Prof. Dr. Jian-Ping Lang 《化学:亚洲杂志》2021,16(18):2674-2680
Reactions of (NH4)2WS4 with CuCN, CuCN/1,2-bis(4-pyridyl)propane (bppa) or [Cu(MeCN)4]PF6/bppa under different reaction conditions afforded a set of two- or three-dimensional W/Cu/S cluster-based coordination polymers including {[Et4N]2[WS4Cu4(μ-CN)2(μ-I)2]}n ( 1 ), [WS4Cu4(μ-CN)2(bppa)2]n ( 2 ) and {[WS4Cu4(bppa)4](PF6)2}n ( 3 ), respectively. Compound 2 can be readily formed from reaction of 1 with bppa under solvothermal conditions. Compounds 1 and 2 feature two-dimensional networks with a “sql” topology, while 3 possesses a two-fold interpenetrated three-dimensional net with a rare “reo” topology. Compounds 1 – 3 in DMF exhibited different third-order nonlinear optical responses, and they all showed a reverse saturable absorption while 2 held a strong self-focusing effect. 相似文献
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蒽醌衍生物的三阶非线性光学极化率 总被引:1,自引:0,他引:1
用有限场 (FF)和含时间的耦合微扰 Hartree- Fork方法计算了蒽醌及其衍生物的三阶非线性光学 (NLO)极化率。计算表明 ,2 ,6位双取代物具有较大的响应系数 ,且随着取代基供电性的增强而增大。含频率的 NLO极化率大于静态值 ,且随频率的增大而增大。 相似文献
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The third-order nonlinear optical properties of the sol-gel derived Pb(Fe1/2Nb1/2)O3-PbTiO3 (PFN-PT) thin films have been investigated by the THG method. The χ(3) values of PFN-PT thin films increased from 3.2×10−12 esu (PT) to 8.5×10−12 esu (PFN) with increasing content of Fe3+ ions which possessed very high second-hyperpolarizability, ψ(Fe2/3O). It was experimentally confirmed that complex oxides such as ABO3-type perovskites consisting of large non-transition metal A-site cations and small transition metal B-site cations exhibited
high χ(3) as expected from Lines' model. It was also found that the χ(3) values of complex oxides could be estimated from the second-hyperpolarizabilities of the constituent single oxides reported
so far. Because of the large remanent polarization, PT thin films may exhibit the highest χ(3) among the ferroelectric PFN-PT thin films studied in the present work. The maximum dielectric constant, ε, of 1990 at room
temperature was obtained for 0.5PFN·0.5PT thin films, whose composition corresponds to so-called morphotropic phase boundary
(MPB). 相似文献