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给出海洛因和鸦片的傅里叶红外吸收实测谱。根据吸收峰的位置,计算出海洛因的基本声子能量:ELO=0.0486eV,ETO1=0.0555eV,ETO2=0.0616eV,ELA=0.0257eV,ETA1=0.0097eV,ETA2=0.0134eV。这些声子按照不同的组合方式,形成海洛因的全部傅里叶红外吸收峰。 相似文献
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可溶性钒氧酞菁在不同介质中的吸收光谱研究 总被引:4,自引:0,他引:4
研究了四丙基取代钒氧酞菁(Pr4VOPc)在不同介质中的吸收光谱。Pr4VOPc分子在不同介质中的吸收光谱差别很大:在稀溶液中以分子的单体吸收为主(λmax=707nm),在浓溶液和PMMA薄膜中由于形成平行排列结构的二聚体而使分子单体的吸收峰发生蓝移(λmax=660nm),在蒸发膜中则由于形成斜交结构的二聚体使得分子单体的吸收峰发生分裂形成红移和蓝移峰(λmax=720nm,660nm),在溶液沉积的固态薄膜中由于形成结晶相I而表现出强烈的近红外吸收(λmax=826.9nm)。造成这种差别的原因是四个丙基的引入加大了VOPc分子的空间位阻效应。通过热处理或溶剂蒸汽处理,可以使Pr4VOPc蒸发膜转变成具有强近红外吸收的结晶相I;而只有通过溶剂蒸汽处理才能使PMMA介质中的Pr4VOPc转变成结晶相II。 相似文献
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用磁园二色谱和光吸收谱对α-NiSO4.6H2O晶体进行了测量和研究,实验结果表明在λ=185~3300nm范围内存在一系列吸收结构,其中三个主要主要吸收带结构分别对应于晶体中Ni离子基态到有关激发态的d-d跃迁,对它们进行了初步指认,实验中观测到红带的λ=654nm和λ=713nm两结构间存在一系列弱的结构峰,它们主要与自旋轨道耦合相互作用结果有关,在磁园二色谱中还观测到λ=585nm的强吸收峰 相似文献
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采用内腔式饱和吸收技术获得 Lam b 凹陷,使 C O 激光磁共振谱仪的灵敏度及分辨率大大提高.利用该技术对自然丰度下15 N 16 O 的 X2Π( υ= 1) ← X2Π( υ= 0) 塞曼跃迁进行测量,实现了包括Λ双分裂在内的各种精细结构的谱分辨.结合已发表的15 N O 同位素分子光谱实验数据进行分析计算,拟合得到迄今最完备、最精确的各相关同位素分子15 N m O( m = 16 —18)的结构参数. 相似文献
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α-呋喃酯的结构与红外光谱特征 总被引:2,自引:0,他引:2
总结和归属了α-呋喃甲酸酯α-呋喃甲醇酯和α-呋喃丙烯酸酯的主要红外吸收谱带和特征,讨论了其红外吸收频率随取代基结构而变化的规律。结果表明:α-呋喃环存在三个明显的吸收特征,α-呋喃丙烯酸酯中VC=C约为1641cm^-1,δ=C-H面外变角振动频率为973cm^-1,表明双键为反式构型。VC=O约为1713cm^-1,C-O-C键对称与伸缩振动在1305,1262和1165cm^-1处产生三个强 相似文献
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D2EHPA萃取稀土的有机相红外光谱及添加DMHPA的影响 总被引:6,自引:1,他引:5
本文研究了部分皂化的二(2-乙基己基)磷酸(D2EHPA)-正庚烷体系萃取稀土离子Y^3+,Pr^3+,Nd^3+,Eu^3+后有机的傅里叶变换红外光谱(FT-IR)。发现不同稀土离子与萃取剂的配位能力有差异,并且皂化度对萃取有机相中的P=O谱带的频率和吸收强度皆有影响,在D2EHPA中加入二(1-甲基庚基)磷酸(DMHPA)导致P=O谱带形状和吸收强度发生变化。 相似文献
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在确定胞嘧啶阴离子自由基特征吸收的基础上,采用脉冲辐解技术,以N2OR e^-aq的清除剂对Cyt水溶液进行了研究。实验结果显示:在不存在自由e^-aq条件下仍产生了Cyt的两个特征吸收峰,即位于λmax=335±5mm处的Cyt-吸收峰和其质子化产物的吸收峰。 相似文献
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Abstract We used the co-decomposition method to make the Bi(Pb)-Sr-Ca-Cu-O superconductor samples (Tc = 112K) under oxygen partial pressure. Oxygen dependence of high-Tc phase was studied. The infrared absorption spectra of (Bi1?xPbx)2Sr2Ca2Cu3O10+σ superconductor were measured at various temperatures from 98 to 290K. A new IR absorption peak was observed at 1265 cm?1 below 217K. The intensity of this peak became stronger with temperature decreasing. 相似文献
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In this work, we have developed an analytical model of a multilayer porous material based on the transfer matrix method to predict the absorption behavior at plane wave incidence. The aim of this study is to modify/tune the sound absorption coefficient of a felt to obtain an improved absorbing performance in the mid frequency range without increasing its weight. To achieve this target, the developed model has been used to find the best combination of each layer type and thickness. The analytical results were validated by test results. 相似文献
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Gou Qingquan Institute of Atomic Molecular Sciences at High Temperature High Pressure Sichuan Union University Chengdu 《原子与分子物理学报》1997,14(1):6-10
文献[1]从理论上阐明了金属原子团簇的公有公有化电子 能谱具有分裂能级的特点,因而其公有化电子具有吸光的特性,并计算了Cu与Al的金属原子团簇的吸收光主普。现进一步推广此理论来计算氢原子团簇的电子能谱与吸收光谱。 相似文献
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Various mineral acids are compared in measuring metals in plant materials by flame and flameless atomic absorption spectrometry. NBS-SRM 1571, Orchard Leaves, is utilized as the plant material. The combination of H2SO4 and HNO3 is found to be the most suitable for measuring Fe, Mn, Cu and Zn by flame atomic absorption spectroscopy, while HNO3 is found to be the best for measuring Cu, Mn, and Pb by flameless Atomic Absorption spectroscopy. 相似文献
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The absorption of optical coatings can be measured by the method described with an accuracy of 0.001%. The radiation absorbed
by the optical coating causes a change in the temperature of the coating and the substrate. The temperature change is measured
by means of a thin-film resistance thermometer deposited on the substrate. The method was tested for laser reflectors at 1060
nm with a laser as a light source. 相似文献
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张茹 《原子与分子物理学报》1995,12(1):1-5
苟清泉在前文中[1],从理论上阐明金属原子团簇的公有化电子能谱具有分裂能级的特点,因而具有吸光的特性,并计算了Cu与Al的金属原子团簇的吸收光谱。现进一步用此理论计算碱金属团簇的电子能谱与吸收光谱。 相似文献
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An analysis is made on the absorption distribution within a cylindrical active medium lamp pumped by means of fused silica light-guides. The performances of the proposed pump cavities are analysed through a non-sequential 3D ray-trace program and are compared to those of three reflective chambers: an elliptical cavity, a close-coupled cavity and a diffusive close-wrap cavity. Two light-guides cavities with eight and nine guides, respectively, were built and tested. High coupling efficiency and a reasonable uniform absorption distribution were registered. An overall laser efficiency of 1% was measured. The proposed cavities have permitted the tailoring of the absorption distribution within the laser rod. 相似文献
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