多孔硅镶嵌正丁胺/激光染料复合膜的荧光谱

多孔介质染料镶嵌膜有可能是发展固体染料激光器的一种途径[1].由于其所具有的微孔结构和大的比表面积,故使其成为激光染料理想的载体,以形成多孔硅基发光材料[2].　　我们用正丁胺作碳源,采用射频辉光(ＲＦ)放电法制备碳膜.利用正丁胺、Ｒ6Ｇ/聚乙二醇分别作碳源和蒸发源得到一种混合膜,如将其沉积在刚制备的新鲜多孔硅上则得到多孔硅镶嵌复合膜.本文着重研究了镶嵌于多孔硅中的正丁胺/Ｒ6Ｇ的荧光光谱,并考察了多孔硅衬底的改变对多孔硅镶嵌膜发光的影响.1　样品制备　　(1)多孔硅的制备　制备多孔硅(ＰＳ)所用的材料为(100)晶向的ｐ型单…     

新型染料碳点的制备及荧光比色法特异性识别Hg2+

报道了一种简便、低成本制备水溶性染料碳点的方法.将甲基紫和柠檬酸混合通过一步水热法制备染料碳点(MV-CDs).利用紫外光谱、荧光光谱、红外光谱、XPS和DLS对MV-CDs进行表征.研究表明,加入Hg~(2+)后,MV-CDs溶液的蓝色消失,但出现了绿色荧光且其强度随Hg~(2+)浓度的增加而增加.因此,MV-CDs通过比色和荧光法特异性检测Hg~(2+),具有较高灵敏度和较低检出限.利用标准加入法对自来水和矿泉水中的Hg~(2+)进行测量,取得满意的回收率.因此,MV-CDs可作为特异性检测Hg~(2+)的纳米探针.     

含肉桂酸酯基螺噁嗪的合成及性质研究

通过缩合法合成了含有肉桂酸酯基的双功能螺噁嗪类化合物,用红外光谱、核磁共振氢谱、碳谱和X射线单晶衍射对其结构进行了表征.紫外-可见光谱研究结果表明:当用400 W高压汞灯照射后化合物在有机溶剂以及高分子膜中都表现出了很好的可逆光致变色性.化合物也显示出了酸致变色性能.此外着重研究了化合物酸致变色荧光性能以及在150 W氙灯照射前后的荧光光谱.加入酸后和光照前后荧光光谱的改变使其有望作为荧光分子开关、非破坏性数据的读取存储介质材料.     

N-苄基吲哚三碳菁染料的合成及性能

合成了5种N-苄基吲哚三碳菁染料,通过红外光谱、核磁共振氢谱及元素分析确证了其结构,并研究了电子吸收光谱、荧光光谱、光稳定性及溶解度。结果表明,染料溶液和膜的最大吸收波长均为780～830nm;染料在二氯乙烷中的溶解度大于在乙醇中的溶解度;氮原子上苄基的引入极大地改进了染料的光稳定性(与HITCI比较).     

N—苄基吲哚三碳菁染料的合成及性能

合成了５种Ｎ－苄基吲哚三碳菁染料，通过红外光谱、核磁共振氢谱及元素分析确证了其结构，并研究了电子吸收光谱、荧光光谱、光稳定性及溶解度。结果表明，染料溶液和膜的最大吸收波长均为７８０￣８３０ｎｍ；染料在二氯乙烷中的溶解度大于在乙醇中的溶解度；氮原子上苄基的吲入极大地改变了染料的光稳定性（与ＨＩＴＣＩ比较）。     

不同溶剂对方块菁染料(SQ-3)LB膜吸收及荧光光谱的影响

利用荧光光谱、紫外可见吸收光谱研究了方块菁染料在不同极性的溶剂中的光谱性质的变化,并利用LB膜技术、Brewster角显微镜及荧光光谱、紫外可见吸收光谱研究了不同极性的铺展溶剂对染料的铺展形态及制备的LB膜样品的光谱性能的影响,说明了分子组装在形成功能薄膜中的重要性.     

二乙烯三胺衍生物对纤维素膜的增塑作用

用Ｎ－（２－胺基乙基）－Ｎ－正辛基－１，２－乙二胺和Ｎ－（２－胺基乙基）－Ｎ－正癸基－１，２－乙二胺增塑再生纤维素膜，并用红外光谱，差热分析以及力学性能测量研究了增塑后膜的结构与性能，实验表明，上述二种化合物对纤维素膜有良好的增塑作用，Ｎ－（２－胺基乙基）－Ｎ－正辛基－１，２－乙二胺水溶性大，和甘油增塑的情况相似，用水浸泡后，增塑效果基本丧失；而Ｎ－（２－胺基乙基）－正癸基－１，２－乙二胺用水浸包     

含蒽醌基双分子膜的电子光谱

用荧光和紫外光谱研究了新合成的含蒽醌(2,6)生色基的单链双亲性分子(ANQU)在水溶液中形成的双分子膜聚集体结构。ANQU在稀水溶液中的吸收光谱比其在乙醇稀溶液中的谱峰有较大的红移；其凝胶态相对于液晶态的吸收谱亦有明显红移。结果表明,ANQU双分子膜中分子的堆积方式是J-聚集,蒽醌生色基以头对尾取向方式排列。变温荧光光谱观察双分子膜中蒽醌生色基的荧光光谱强度和峰位极敏感地受到双分子膜物理状态变化的影响。     

混合溶剂对可录型光盘中吲哚类菁染料薄膜性能的影响

本文采用紫外可见光谱、FT-IR及AFM等手段,研究了混合溶剂对光盘记录介质吲哚类菁染料薄膜光学性能、稳定性和表面结构的影响.发现在不同混合溶剂下涂出的相同膜厚的染料薄膜,其光学性能和表面形貌都有很大的差异.不同的混合溶剂都存在一个最佳混合体积比,染料在此体积比下旋涂出膜的光学性能和表面形貌均优于单一溶剂下涂出的膜.对比不同混合溶剂涂出的膜的光学性质及AFM的观测结果,发现二丙酮醇与氯仿在等体积比混合、四氟丙醇与氯仿在7:3体积下混合时效果最好,易得到反射率高,表面较平整的染料薄膜.     

有机化合物的光物理研究 ⅩⅢ.β-萘甲酸十六碳酯在L-B膜中基态二聚体及激基缔合物形成的研究

制备了β-萘甲酸十六碳酯的L-B膜。分别用Y型、Z型,以及含有硬脂酸的β-萘甲酸十六碳酯与单纯硬脂酸间隔挂法,将分子膜转移至石英载片上,研究了β-萘甲酸十六碳酯分子膜吸收以及荧光光谱。并与溶液和固态中的荧光光谱作了比较。在氯仿溶液以及在固态,β-萘甲酸十六碳酯只呈现其单体的荧光。然而,在L-B膜中,除了观察到单体的荧光外,还观察到了激发态二聚体以及激基缔合物发射的荧光。通过对β-萘甲酸十六碳酯分子膜进行热和水处理后,发现L-B膜中亲水层的介质环境有所改变,从而造成亲水层中的亲水基团的某些物理和化学性质的改变。根据实验事实,提出了β-萘甲酸十六碳酯二聚体和激基缔合物在L-B膜中形成的机制。     

Conformational behaviour and vibrational spectra of cyclopropyl methyl ketone and methyl cyclopropyl-carboxylate

Infrared spectra in the vapour, liquid, and crystalline states and Raman spectra in the liquid and crystalline states have been obtained for cyclopropyl methyl ketone and for methyl cyclopropylcarboxylate. In cyclopropyl methyl ketone, the dominant conformer in the liquid and vapour states, the cis, has been shown to exist exclusively in the crystal. In methyl cyclopropylcarboxylate, the conformer dominant in the liquid and vapour states has been demonstrated to exist in the crystal. Vibrational assignments are made for the ring modes and for those modes which are sensitive to conformational changes.     

Infrared and raman spectra,conformation and force field of 3-methoxy propyne

The infrared spectra of 3-methoxy propyne (CH₃OCH₂CsolutionCH) in and in the crystalline and vapour states have been studied. The Raman spectra of 3-methoxy propyne and 3-methoxy propyne- 1-d have also been measured. The spectra are relatively simple, and no significant spectral alterations are revealed on conversion from vapour, to liquid, to the crystalline state. Together with vapour phase band contours and Raman polarization measurements this indicates that there is predominantly one conformer in all three states. An assignment has been proposed, based on a gauche conformation and supported by normal coordinate analysis.     

Conformational behaviour and vibrational spectra of cyclopropylcarbinol and 1-cyclopropylethanol

Infrared spectra in the vapour, liquid and crystalline states as well as in dilute CCl₄ solution, and Raman spectra in the liquid and crystalline states were recorded for cyclopropylcarbinol and 1-cyclopropylethanol. Some weak vibrational bands present in the spectra of the vapours, liquids and solutions vanished in the crystalline solids. The spectra of each compound have been interpreted in terms of an equilibrium between a stable conformer, dominating in the vapour and liquid states and exclusively present in the crystals and one or more other conformers of small abundance. Vibrational assignments are presented for the ring modes and for those modes which are sensitive to conformational changes.     

Conformation and vibrational spectra of 1,5-hexadiyne (bipropargyl)

The infrared spectra of 1,5-hexadiyne (bipropargyl) as a vapour, liquid and crystalline solid and in several solvents have been recorded. Raman spectra were obtained for the liquid (including polarization measurements), the crystal and for several solutions.The data were interpreted in terms of two conformers, trans and gauche, in the vapour and liquid states and one, the trans, in the crystalline form. Interpretation of the spectra in terms of the conformational equilibria was not straightforward, and firm conclusions could not be drawn from the spectra alone. Vibrational assignments were made, supported by normal coordinate calculations.     

The vibrational spectra of maleic anhydride and its deuterated species

The infrared spectra of maleic anhydride and its mono- and dideuterated species were recorded in the region 5000-50 cm⁻¹ in the vapour phase and in solution. Raman spectra of the solids and supercooled melts were obtained. Assignments of the fundamental vibrational frequencies are given, based upon semiquantitative polarization data and the infrared vapour contours as well as on the product rule and complete isotopic rule for the three compounds.     

Comparative study of infrared and Raman spectra of CCl4 in vapour and condensed phases: effect of LO-TO splitting resulting from hetero-isotopic TD-TD interactions

Salient features of an in-depth comparative study of infrared and Raman spectra of CCl(4) in vapour, liquid and condensed phases are presented. Wavenumbers of nu(4), nu(1)+nu(4), nu(3) and 2 nu(3) modes of CCl(4) vapour in infrared and Raman spectra are found to be in good agreement. Analysis of the vibrational spectra of liquid CCl(4) together with the spectroscopic observations on solid CCl(4) at low temperatures reveal TD-TD interaction amongst various CCl(4) isotopes in condensed states. The concept of LO-TO splitting of dipole active nu(3) and nu(1)+nu(4) Fermi doublet have been invoked to explain several features of the vibrational spectra of liquid CCl(4). There is significant strengthening of Fermi resonance interaction between nu(3) and nu(1)+nu(4) modes of CCl(4) in condensed phases relative to that in vapour phase. The Fermi resonance interaction parameter W has been found to be independent of molecular environment.     

SPECTRAL PROPERTIES OF (ISO)ALLOXAZINES IN THE VAPOUR PHASE

Abstract— Spectral properties of alloxazine and isoalloxazine derivatives were determined at high temperatures in the vapour phase. In comparison with spectra observed in solution, vapour phase spectrometry gives primary photophysical properties of the isolated chromophore. Fluorescence lifetimes in the vapour phase range from <0.5 to 18 ns. There is some indication that an intramolecular complex can exist between the isoalloxazine moiety and its aliphatic side chain carrying a polar (hydroxyl) group. Direct photodissociation of the molecule in its first electronically excited singlet state is not very probable.     

Electronic absorption spectra of 1,2,3-trimethyl benzene

The electronic absorption spectra of 1,2,3-trimethyl benzene in the vapour and solid phases and in an isobutyl alcohol rigid glass at 90°K are described in this paper. Some characteristic features of the vibrational structure of the spectra are discussed.     

The visible spectrum of fulvene

Vapour phase and mixed crystal of the visible band system of fulvene are reported. The spectra show several interesting features including a main progression of 660 cm^?1 corresponding to the out-of-plane methylene twisting vibration. Strong Herzberg—Teller origins together with the breadth and overall diffuseness indicate two electronic states of symmetry A₁ and B₂ may be responsible for the observed spectrum. The spectra are blue shifted in going from the vapour to mixed crystal and show sequence structure to the blue of the main bands in the vapour phase.     

Conformation and vibrational spectra of 1-bromo-1,5-hexadiyne (bromobipropargyl)

The IR spectra of 1-bromo-1,5-hexadiyne (bromobipropargyl) as a vapour, liquid and crystalline solid and in several solvents have been recorded. Raman spectra were obtained for the liquid (including polarization measurements) and the crystal.The data were interpreted in terms of two conformers, trans and gauche, in the vapour and liquid states and one, trans, in the crystal. The conclusion that the trans conformer was the one present in the crystal was based on several independent pieces of evidence. Vibrational assignments were made, supported by normal coordinate calculations.