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1.
蒋淑艳 《光谱学与光谱分析》1997,(3)
本文研究了题述方法的测定条件,并引入系数校正以消除同系物苯并(k)荧蒽对苯并(a)(BaP)的测定干扰,在其他文献中未见报道。此法较现行的普通荧光窄基线法测定操作简便快速。实样测定结果满意 相似文献
2.
制备了两种不同基质的掺杂3d_(z ̄2)基态铜(Ⅱ)苯并15冠5配合物(Cu(Ⅱ)B15C5)的粉末样品,ESR测定结果表明,以B15C5为基质时,Cu(Ⅱ)B15C5的轴向配体是H_2O;而以Mg(Ⅱ)B15C5为基质时的轴向配体则是.不同的轴向配体对ESR谱的线型有着较大的影响。利用Bleaney公式,计算了键参数,并对成键特性进行了讨论和比较。 相似文献
3.
本文利用现场拉曼光谱研究了中性含氯离子溶液中苯并三氮唑在铜和铁电极表面的吸附以及成膜行为,结果表明苯并三氮唑能强烈地化学吸附于铜电极和铁电极表面,形成类似[Mn(BTA)p]的配合物膜,一定程度上阻止了膜内外物质的交换,对金属起缓蚀作用。另一方面两种金属表面配合物膜均具有电位依赖性:在铜电极表面,当外加电位由-0.5V负移至-0.9时,发生了由[Cu(I)(BTA)]n向[Cu(I)Cl(BTAH 相似文献
4.
光学非线性LB膜的时间稳定性与光致漂白效应的关系 总被引:1,自引:0,他引:1
用光学二次谐波产生(SHG),拉曼散射和紫外-可见吸收光谱等方法研究了偶氮,苯腙及半花菁三种有机染料Z型Langmuir-Blodgett(LB)多层膜的时间稳定性问题,发现:随着放置时间的推延,其中LB膜的二次谐波产生信号强度下降,然后逐渐达到稳定;在高压汞灯光照射下,粉末样品中N=N(偶氮),C=N(苯腙),C=C(半花菁)键伸缩振动所对应的拉曼峰强度以及这三类染样在LB膜样品中对所应的生色团 相似文献
5.
选用碳链长度相同,极性基不同的三类表面活性剂:两性(C12BE)阴离子(SDS)阳离子(DTAB)形成胶束,通过高分辨核磁共振仪及分光光度计,研究了有或无高分子化合物PVP(聚乙烯吡咯烷酮)时,三类胶束增溶苯甲醇的位置及增溶量,结果表明,PVP包缠于SDS胶束外围,并有部分高分子链嵌入胶束中,使胶束粒径扩大,不仅侃SDS长链亚甲基裂分所需的增溶量增大,而且使SDS胶束增溶苯甲醇的总量也增大,但是, 相似文献
6.
本文中制备了电荷转移络合物萘-I2(Nap-I2),苯乙烯-I2(Sty-I2)偶氮苯-I2(azob-I2),对二甲苯-I2(p-xyl-I2)以及吡啶-Br2(Py-Br2),以I2的共振吸收频率激发样品,在Raman散射实验中观察到了它们络合后退偏比的增强,并对退偏比的增强机理进行了讨论。 相似文献
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PPV衍生物/C60薄膜的时间分辨荧光光谱研究 总被引:2,自引:1,他引:1
用皮秒锁模Nd:YAG激光器的倍频输出作为激发光,用同步扫描条纹相机系统对聚对苯乙炔PPV的两种衍生物,Poly(2-methoxy-5-(4-butenyloxy)phenylene vinylene)(MBPPV)和Poly(2-methoxy-5-(4-bromo-buoxy)phenylene vinylene)MBB-PPV),与富勒烯C60的组合薄膜进行时间分辨荧光测量。 相似文献
9.
铜(II)盐催化氯代苯酚聚合反应机理的研究 总被引:1,自引:0,他引:1
本文研究了铜(Ⅱ)盐催化氯代苯酚的聚合反应,利用元素分析、IR(红外)和NMR(核磁共振)对聚合物的结构进行了鉴定。分离出了聚合过程中所形成的氯代苯氧-铜(Ⅱ)配合物中间体,并利用元素分析、ESR(电子自旋共振)研究了该配合物中间体。该配合物中间体在苯中回流得到相应的聚合物。ESR研究该配合物中间体发现在室温下有苯氧自由基的存在,并在120℃热分解过程中发现苯氧自由基的ESR谱随着测定时间的延长强 相似文献
10.
阐述了紫外无机非线性光学晶体分子工程学探索方法的基本特点,具体分析深紫外无机非线性光学晶体硼铍酸锶(SBBO)以氟硼铍酸钾(KBBF)为主要参考晶体的分子设计方法,随后根据晶体结构研究、单晶培养、和非线性光学性能测定等实验结果讨论SBBO作为新型深紫外无机晶体的主要优点,即它既具有更短的紫外吸收边(接近155nm)和较大的非线性光学系数(d22(SBBO)=06×d22(BBO)=138pm/V),同时晶体无明显层状习性,并肯有良好的化学稳定性和机械性能 相似文献
11.
采用火焰原子发射光谱法对含铟冶炼废渣中的铟含量进行了测定,对测定条件,干扰因素进行了研究,并与火焰原子吸收法的结果进行了对比。 相似文献
12.
I. V. Zhuk E. M. Lomonosova O. I. Yaroshevich M. K. Kievetz S. F. Boulyga I. A. Tzekhanovich Yu. I. Bondar 《Radiation measurements》1995,25(1-4):385-387
An investigation of vertical distribution of alpha-emitting nuclides for various types of soils using solid state nuclear track detectors (SSNTD) has been carried out. As SSNTD the DNC-film was used. Experimental system for measurement of total alpha activity in the samples of soils, including devices and equipment for selection of probes, exposition, chemical etching of detectors, automated accounting of tracks has been developed. The method of determination of specific activity of alpha emitting nuclides has been created. A comparison results of measurements with the method pointed out and radiochemical method as well as x-y-spectrometry method has been carried out. 相似文献
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A method has been developed for processing spectra of multiple small-angle neutron scattering (MSANS) to obtain information about substance heterogeneities, namely, their size and concentration. A method has been proposed for constructing the dependence of the MSANS line width on the sample thickness starting from the angular neutron distribution measured for one sample. The standard method for processing this dependence has been improved for application at any scattering multiplicity and complete account for the instrumental line of the double-crystal spectrometer. The method has been tested for the MSANS spectra of the samples of the Fe-Ni ferromagnet, Al powders, and HTSC ceramics. 相似文献
15.
I.Mathematicalmodelofacousticfie1dByapplyingtheSommerfeldradiationcondihonThus,anacousticfic1disdescribcdbyHelmholtzformula.Byconsideringaficldpointinthearea,Helmholtzformulaisgivenbythefollowingthreeintegra1equations:(1)Theexternalintcgra1fOrmu1a'(2)Thcintcrnalintegralformu1af(3)Thesurfaceintegralformu1afwhcreP.isthesoundpressureonthcSsurface;rthedistancefrompointqtothee1ementsurfacedSiqtheficldpoint,tuthefrcqucncyoftheacousticradiation;pthedensityofthesurroundingmedium,vsthenormalvibrati… 相似文献
16.
I. I. Belotelov A. V. Lanyov G. A. Ososkov 《Physics of Particles and Nuclei Letters》2006,3(4):261-272
In this paper a method of internal alignment of HERA-B OTR PC chambers is discussed. The method is based on a simultaneous
fit of the track and alignment parameters, using Millepede matrix reduction and singular value decomposition. Software implementing
this idea has been developed, and the method has been studied on Monte Carlo models with different levels of simulation. A
generalization of this method for the case of the nonlinear track model has been proposed.
The text was submitted by the authors in English. 相似文献
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18.
桑色素-过氧化氢体系催化光度法测定痕量锰的研究 总被引:3,自引:1,他引:3
本文建立了基于过氧化氢氧化桑色素这一新指标反应催化光度法测定痕量锰的新方法。该法的检出限为0.004μg/mL,线性范围为5~80ng/mL。该法已用于白酒中锰的测定。 相似文献
19.
A. I. Ignat’ev N. V. Nikonorov I. V. Mochalov E. V. Tsygankova 《Bulletin of the Russian Academy of Sciences: Physics》2007,71(2):154-158
Static temperature gradient method has been developed for determining the thermal resistance of laser materials. The scheme of the method is maximally close to actual conditions under which the laser active element operates. The method has been tested on glass and crystalline specimens. The results of the thermal-resistance tests based on the new method are compared to those obtained by the standard thermal-shock method. 相似文献
20.
G. Kh. Kitaeva A. N. Penin A. N. Tuchak A. V. Shepelev P. V. Yakunin 《JETP Letters》2010,92(5):291-294
A method has been proposed for the absolute measurement of the spectral brightness of terahertz radiation in the process of
the parametric frequency conversion to the optical range. The method has a low threshold flux and does not require extrinsic
references. The method simultaneously allows for the calibration of thermal fluctuations and the determination of the absolute
local temperature of a nonlinear converter crystal. 相似文献