表面活性剂热致液晶性质的拉曼光谱研究

表面活性剂热致液晶性质的拉曼光谱研究徐蔚青吴立新１，２（１吉林大学超分子结构与谱学开放实验室长春１３００２３２中科院长春物理研究所）ＲａｍａｎＳｐｅｃｔｒａｏｆａＳｕｒｆａｃｔａｎｔｏｎＴｈｅｒｍａｌｔｒｏｐｉｃＬｉｑｕｉｄＣｒｙｓｔａｌＰｒｏｐｅｒ...     

色素蛋白的共振Raman和FT-Raman光谱

色素蛋白的共振Ｒａｍａｎ和ＦＴ－Ｒａｍａｎ光谱李正强１卜凤泉２（１．吉林大学超分子结构与谱学开放实验室长春１３００２１）（２．白求恩医科大学应用基础医学研究所长春１３００２１）ＲｅｓｏｎａｎｃｅＲａｍａｎａｎｄＦＴ－ＲａｍａｎｏｆＣｈｒｏｍｏｐｈｏｒ...     

付立叶变换拉曼光谱研究液晶分子结构

付立叶变换拉曼光谱研究液晶分子结构姜世梅吴英徐蔚青李伯符（吉林大学国家教委超分子结构与谱学开放实验室长春１３００２３）田颜清赵英英汤心颐（吉林大学化学系长春１３００２３）ＦＴ┐ＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｉｃＳｔｕｄｉｅｓｏｎｔｈｅＭｏｌｅｃｕｌ...     

Energy and fine structure of the lithium isoelectronic sequence

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｐｒｅｃｉｓｉｏｎｃａｌｃｕｌａｔｉｏｎｏｆｔｈｅｌｉｔｈｉｕｍｌｉｋｅｓｙｓｔｅｍｓｗｉｔｈａ１ｓ２ｃｏｒｅｐｒｅｓｅｎｔａｆｏｒｍｉｄａｂｌｅｃｈａｌｅｎｇｅ［１］．Ｆｏｒｓｏｍｅｃｏｒｅｅｘｃｉｔｅｄｌｉｔｈｉｕ...     

聚合物分散液晶(PDLC)光栅的制备及其光衍射特性

聚合物分散液晶（ＰＤＬＣ）光栅的制备及其光衍射特性任洪文黄锡珉王宗凯马凯（中国科学院长春物理研究所北方液晶研究开发中心长春１３００２１）ＦａｂｒｉｃａｔｉｏｎｏｆＰＤＬＣＧｒａｔｉｎｇａｎｄＩｔｓＯｐｔｉｃａｌＤｉｆｒａｃｔｉｖｅＰｒｏｐｅｒｔｉｅｓ...     

A Novel Fiber Taper for Efficient Optical Interconnection

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｅｒｃｏｎｎｅｃｔｉｏｎｓｏｆｏｐｔｉｃａｌｗａｖｅｇｕｉｄｅｃｏｍｐｏｎｅｎｔｓｗｉｔｈｄｉｆｅｒｅｎｔｍｏｄａｌｓｐｏｔｓｉｚｅｓ，ｐａｒｔｉｃｕｌａｒｌｙｆｏｒｔｈｅｃｏｎｎｅｃｔｉｏｎｏｆ（１）ｌａｓｅｒｓｏｕ...     

Study on Graphic Distortion in Laser Display

１　ＩｎｔｒｏｄｕｃｔｉｏｎＦｉｇ．１ＤｕａｌｇａｌｖａｎｏｍｅｔｅｒｓｃａｎｉｎｇｓｙｓｔｅｍＦｏｒｌａｓｅｒｄｉｓｐｌａｙｔｅｃｈｎｏｌｏｇｙ,ｔｈｅｓｃａｎｎｉｎｇｓｙｓｔｅｍｂａｓｅｄｏｎｇａｌｖａｎｏｍｅｔｅｒｉｓａｋｅｙｄｅｖｉｃｅ（Ｆｉｇ．１）．ＢｙｃｏｎｔｒｏｌｌｉｎｇｔｈｅＸＹｓｃａｎｎｅｒ,ｔｈｅｌａｓｅｒｂｅａｍｓａｒｅｓｔｅｅｒｅｄｓｏｑｕｉｃｋｌｙ,ｔｈａｔｔｈｅｇｒａｐｈｉｃｓａｎｄｃａｒｔｏｎｃａｎｂｅｄｉｓｐｌａｙｅｄｏｎａｓｃｒｅｅｎｏｒｔｈｅｂｅａｍｅｆｆ…     

Experimental Study on Stable 10 GHz Actively Mode locked Fiber Ring LaserSupported by the National Natural Science Foundation of China (No. 69738010) and the High Technology Research and Development Program of China.

１ＩｎｔｒｏｄｕｃｔｉｏｎＭｏｄｅｌｏｃｋｅｄｆｉｂｅｒｌａｓｅｒｓａｒｅｔｈｅａｔｒａｃｔｉｖｅｓｏｕｒｃｅｓｏｆｕｌｔｒａｓｈｏｒｔｏｐｔｉｃａｌｐｕｌｓｅｓａｔｔｈｅｃｏｍｍｕｎｉｃａｔｉｏｎｗａｖｅｌｅｎｇｔｈｏｆ１．５５μｍｂｅｃａｕｓ...     

A Novel Fabrication Technique of Long Period Fiber Gratings

１ＩｎｔｒｏｄｕｃｔｉｏｎＳｉｎｃｅｔｈｅｄｉｓｃｏｖｅｒｙｏｆｐｈｏｔｏｓｅｎｓｉｔｉｖｉｔｙｉｎｇｅｒｍａｎｏｓｉｌｉｃａｔｅｏｐｔｉｃａｌｆｉｂｅｒｓｂｙＨｉｌｅｔａｌ．ｉｎ１９７８［１］，ｓｉｇｎｉｆｉｃａｎｔｐｒｏｇｒｅｓｈａｓｂｅｅｎｍａ...     

A Useful Technique to Fabricate Fan-out Grating

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｆａｎｏｕｔｇｒａｔｉｎｇｗａｓｗｉｄｅｌｙｕｓｅｄｉｎｏｐｔｉｃａｌｉｎｆｏｒｍａｔｉｏｎｐｒｏｃｅｓｉｎｇｓｙｓｔｅｍ，ｏｐｔｉｃａｌｉｎｔｅｒｃｏｎｎｅｃｔｉｏｎ［１］，ｌａｓｅｒｄｅｍｏｎｓｔｒａｔｉｏｎａｎ...     

Surface‐enhanced Raman scattering of 4‐aminobenzenethiol on silver: confirmation of the origin of b2‐type bands

In order to resolve the dispute on the origin of the b₂‐type bands in the surface‐enhanced Raman scattering (SERS) of 4‐aminobenzenethiol (4‐ABT), we have measured its SERS spectra under a variety of conditions, including variable temperature and rotation, electrochemistry, and pH, as well as in the presence of a reducing agent. For comparison, the SERS spectra of 4‐nitrobenzenethiol (4‐NBT) and methyl orange (MO), a prototype azo compound, were also measured. First, we found that 4‐ABT on Ag is not subjected to photoreaction, although 4‐NBT is highly photoreactive on a silver surface. In the electrochemical environment, b₂‐type bands of 4‐ABT lost their intensity at very negative potentials, but the intensity recovered immediately upon raising the potential. In addition, b₂‐type bands were observed under rotation even after lowering the potential. The disappearance and reappearance of the b₂‐type bands could also be observed by bringing the sample of 4‐ABT on Ag into contact consecutively with a borohydride solution and water. This is because the surface potential of Ag is lowered by contact with a borohydride solution. Besides, we found that not only the normal Raman but also the SERS spectral features of 4‐ABT are hardly affected by pH variation, while the spectral features of MO are greatly affected, especially in the region of the NN stretching vibration, suggesting that the possibility of a photoconversion of 4‐ABT to an azo compound is low. Altogether, the b₂‐type bands were attributed to 4‐ABT, appearing in conjunction with the chemical enhancement mechanism in SERS. Copyright © 2011 John Wiley & Sons, Ltd.     

液晶冠醚4—（烯丙基氧）—4′—（4′—羧基苯并—15—冠—5）联苯的变温红外光谱和拉曼光谱研究

本文用红外光谱法和激光拉曼光谱法研究了液晶冠醚４一（烯丙基氧）一４′一（４′一羧基苯并一１５一冠一５）联苯在升温时从结晶态到液晶态再到各向同住的液态相转变过程中红外光谱和拉曼光谱的变化。对该液晶冠醚的红外和拉曼特征频串进行了初步的经验式归属，并以频率位移、相对强度及峰形的变化描述了该化合物的相转变并初步讨论了相转变过程中光谱信息与分子结构的关系。     

Skeletal deformation vibrations and rotational isomerism of ethylenediamine and monoethanolamine

The infrared and Raman spectra of ethylenediamine hydrochloride, sulfate crystals, their N-deuterated compounds and ethylenediamine in the liquid and gaseous states and in cyclohexane solution were studied.The skeletal deformation vibration frequencies were found to be conformation sensitive and showed that the ethylenediamine molecule takes the trans and gauche forms in the liquid state and the gauche form in the gaseous state and in cyclohexane solution.The infrared and Raman spectra of monoethanolamine were studied in the liquid state. The spectra in the region for which the skeletal deformation vibration bands appear showed that the monoethanolamine molecule takes the trans and gauche form in the liquid state.     

广西大化墨玉的矿物学及谱学特征研究

近年来大量的墨玉在国内外玉石市场上陆续出现,广西大化墨玉是最新发现的墨玉新品种。为了探究广西大化墨玉的矿物学及谱学特征,针对产自广西大化瑶族自治县的墨玉样品进行了常规检测,以及采用X射线粉末衍射仪、激光拉曼光谱仪、傅里叶红外变换光谱仪和激光剥蚀等离子体质谱仪等现代谱学仪器测试分析,从矿物组成、拉曼光谱和红外光谱以及化学元素组成进行了研究分析。常规宝石学特征测试显示广西大化墨玉的折射率为1.64(点测),比重为3.12。偏光显微镜观察显示广西大化墨玉的主要矿物为阳起石,含量大于98%,结构为显微毛毡状结构。XRD测试明确样品主要成分为阳起石,其特征面网间距为8.498 3和3.145 9。傅里叶红外变换光谱仪测试结果显示样品的红外光谱与透闪石理论值接近,主要的特征峰为1 078,1 026,925,765,703,659,584,485,436cm~(-1),其中1 078,1 026,925cm~(-1)为O—Si—O和Si—O—Si的反对称伸缩振动及O—Si—O对称伸缩振动,765,703,659cm~(-1)为Si—O—Si对称伸缩振动,584,485,436cm~(-1)为Si—O弯曲振动。激光拉曼光谱测试测试结果显示样品的图谱基本集中在3500~3 800和119~1 054cm~(-1)这两个区域内,样品的拉曼光谱119~1 054cm~(-1)的特征峰中1 055,1 029和930cm~(-1)为闪石类矿物特征的Si—O伸缩振动,744和671cm~(-1)为Si—O—Si伸缩振动,且在671cm~(-1)是强度最大的特征峰位,代表硅氧四面体结构单元中桥氧的对称伸缩振动;在3 800~3 500cm~(-1)区间为M—OH伸缩振动区域,反映了M1和M3位置的阳离子与结构中的OH-成键的振动信息,位于3 628,3647,3 664,3 678cm~(-1),这是由于OH-伸缩振动导致。通过激光剥蚀质谱仪测试分析发现样品的主要化学成分为SiO2(52.4%),FeO(21.95%),CaO(12.5%)和MgO(12.4%)。此外还含有少量Al2O3,MnO,Na2O,P2O5,K2O和TiO2,由于样品富含Fe元素,计算Mg/(Mg+Fe)=0.504,因此大化墨玉为软玉中的阳起石玉,并由此推断大化墨玉的黑色由含铁量较高所致。     

苯海拉明的拉曼光谱和红外光谱研究

测量并分析了盐酸苯海拉明的红外光谱和拉曼光谱。在Raman光谱中, 1001 cm-1出现一个极强峰, 在1030 cm-1和618 cm-1各有一个中等峰,此外,在红外光谱中, 714 cm-1和757 cm-1附近出现极强的吸收峰,认定这个化合物中存在单取代苯。C-N的对称伸缩振动出现在837 cm-1, 1433 cm-1和1470 cm-1分别为CH2和CH3的变形振动, 在红外光谱中, 1020 cm-1处明显的吸收峰属于C-O-C反对称伸缩振动。此外, 测量得到含量为25 mg苯海拉明药片的拉曼光谱与纯苯海拉明的拉曼峰比较一致, 可作为无损快速检测该药物的手段。     

Vibrational Spectroscopic Characterization of the Arsenate Mineral Barahonaite: Implications for the Molecular Structure

The mineral barahonaite is in all probability a member of the smolianinovite group. The mineral is an arsenate mineral formed as a secondary mineral in the oxidized zone of sulphide deposits. We have studied the barahonaite mineral using a combination of Raman and infrared spectroscopy. The mineral is characterized by a series of Raman bands at 863 cm^?1 with low wavenumber shoulders at 802 and 828 cm^?1. These bands are assigned to the arsenate and hydrogen arsenate stretching vibrations. The infrared spectrum shows a broad spectral profile. Two Raman bands at 506 and 529 cm^?1 are assigned to the triply degenerate arsenate bending vibration (F ₂, ν₄), and the Raman bands at 325, 360, and 399 cm^?1 are attributed to the arsenate ν₂ bending vibration. Raman and infrared bands in the 2500–3800 cm^?1 spectral range are assigned to water and hydroxyl stretching vibrations. The application of Raman spectroscopy to study the structure of barahonaite is better than infrared spectroscopy, probably because of the much higher spatial resolution.     

红外和拉曼光谱的煤灰矿物组成研究

研究煤灰中矿物质的性质通常从矿物组成的表征入手。为了分析两种高硅铝煤灰的矿物成分，采用傅里叶变换红外光谱(FTIR)、拉曼光谱和X射线衍射(XRD)技术对煤灰样进行了测试和综合表征，将FTIR和拉曼光谱的分析结果与XRD进行了比较。FTIR结果表明，在1 100~1 000 cm-1范围内高硅铝煤灰出现最强的特征峰，例如石英峰(1 089 cm-1)和偏高岭石峰(1 042 cm-1)，它们都归属于Si-O伸缩振动。对原始红外谱图进行二阶导数处理后，可获得重叠峰的峰位，有助于更完整的解析矿物吸收峰，从而获得更丰富的矿物组成信息。煤灰中硬石膏的红外和拉曼光谱发现，在1 157，1 126和674 cm-1的拉曼光谱峰与在1 151，1 120和678 cm-1的红外光谱峰振动模式分别相同且峰位接近，还存在一些完全不同的拉曼光谱与红外光谱峰，表明这两种光谱存在互补性。尽管煤灰中锐钛矿含量很低，但由于Ti-O的极化率很高，因此拉曼光谱显示锐钛矿的144 cm-1峰远远强于石英的461 cm-1峰。XRD结果表明，煤灰中主要存在石英、云母、赤铁矿、硬石膏和未知的无定形相矿物，FTIR和拉曼光谱综合分析的结果表明除了这些矿物，还存在偏高岭石、无定形氧化硅、长石、方解石和锐钛矿等。在定性分析方面，将FTIR和拉曼光谱结合起来比XRD单独获得的矿物组成信息更为详细。     

几种哌嗪类抗肿瘤化合物的拉曼光谱

几种哌嗪类抗肿瘤化合物的拉曼光谱刘社文１梁二军１李祥杰２（１郑州大学河南省激光应用技术重点实验室，２郑州大学化学化工学院，郑州４５００５２）ＲａｍａｎＳｐｅｃｔｒａｏｆＳｅｖｅｒａｌＡｎｔｉｔｕｍｏｒＰｉｐｅｒａｚｉｎｅｓＣｏｍｐｏｕｎｄｓＬｉｕＳｈ...     

Raman spectroscopic study of the antimonate mineral bottinoite Ni[Sb2(OH)12]·6H2O and in comparison with brandholzite Mg[Sb5+2(OH)12]·6H2O

Raman spectroscopy was used to study the mineral bottinoite and a comparison with the Raman spectra of brandholzite was made. An intense sharp Raman band at 618 cm⁻¹ is attributed to the SbO symmetric stretching mode. The low intensity band at 735 cm⁻¹ is ascribed to the SbO antisymmetric stretching vibration. Low intensity Raman bands were found at 501, 516 and 578 cm⁻¹. Four Raman bands observed at 1045, 1080, 1111 and 1163 cm⁻¹ are assigned to δ SbOH deformation modes. A complex pattern resulting from the overlapping band of the water and hydroxyl units is observed. Raman bands are observed at 3223, 3228, 3368, 3291, 3458 and 3510 cm⁻¹. The first two Raman bands are assigned to water stretching vibrations. The two higher wavenumber Raman bands observed at 3466 and 3552 cm⁻¹ and two infrared bands at 3434 and 3565 cm⁻¹ are assigned to the stretching vibrations of the hydroxyl units. Observed Raman and infrared bands are connected with O H···O hydrogen bonds and their lengths 2.72, 2.79, 2.86, 2.88 and 3.0 Å (Raman) and 2.73, 2.83 and 3.07 Å (infrared). Copyright © 2010 John Wiley & Sons, Ltd.     

药用植物真伪品的FT-Raman光谱法鉴别研究

首次采用近红外傅里叶变换拉曼光谱法 (NIR Raman)无损快速鉴别了药用植物肉桂、天麻及其伪(混淆 )品。结果表明 :药用植物肉桂、天麻及其伪 (混淆 )品在拉曼光谱图上有明显的差别。如肉桂在 1 60 0和 1 3 0 0cm- 1有较特征的基频振动峰 ,而肉桂的混淆品阴香 1 3 3 0cm- 1的峰较弱 ,相反的是 1 62 4和 1 5 97cm- 1的基频振动峰较强。天麻在 2 91 4cm- 1的C H振动峰与羊角天麻的 2 93 4cm- 1位移了 2 0个波数 ,另外羊角天麻在 1 60 5cm- 1有较强的拉曼基频振动峰 ,而药用天麻此处未见振动峰。凭借这些谱峰的差异可进行药材的真伪鉴别。该方法具有快速、准确、操作简单、不破坏样品 ,可直接进行鉴别的特点。