聚-N-乙基-4-乙烯基吡啶/甲基橙复合物染料的合成及性质研究

采用分子复合的方法,在水溶液中合成了具有稳定结构的聚-N-乙基-4-乙烯基吡啶/甲基橙复合物高分子染料.紫外-可见吸收光谱发现得到的高分子染料在氯仿溶液中的吸收波长与染料单体在水溶液中的吸收波长相比发生了显著蓝移,其中最大可见吸收波长蓝移值达40 nm(由460 nm到420 nm).同时,DSC、X射线衍射实验还研究了这种复合物的分子凝聚态结构.     

1,1’-二乙基-3,3’-二(γ-磺丙基)-5,5’-二三氟甲基咪碳菁钠盐合成与溶剂效应研究

合成了阴离子碳菁染料１ ,１’二乙基３ ,３’二（γ磺丙基）５ ,５’二三氟甲基咪碳菁钠盐及其中间体,通过红外光谱、核磁共振与质谱对染料结构进行了表征。测定了染料在１１ 种溶剂中的紫外可见吸收光谱,通过把染料在不同溶剂中的吸收波数γ＝ （λｍａｘ） － １（ｃｍ － １） 与溶剂的 Ｂａｙｌｉｓｓ 函数ｆ（ｎ） ＝ （ｎ２ － １）／（２ｎ２ ＋ １） 进行关联,发现两者具有一定的线性关系,但相关系数不太理想。考虑到溶剂极化对染料光谱吸收的影响,引进了函数ｆ（ｎ ,ε）＝ ｆ（ｎ） ＋ α（ε－ １）／（ε＋ ２） 进行关联。当反映溶剂极化影响的比例因子α取负号时,两者具有很好的线性关系,相关系数达到０９６ 以上。α取正号时,两者的相关性不好。而且,随着溶剂极性增大,染料吸收峰产生蓝移,染料呈现负性溶剂化显色效应。     

基于刚果红的高分子染料制备及pH响应变色性能

为开发pH响应变色智能纺织品,以异佛尔酮二异氰酸酯为硬段、聚乙二醇1000为软段、1,4-丁二醇为扩链剂、刚果红为发色体,制备了具有pH响应变色功能的水性聚氨酯高分子染料,并将其用于棉织物涂层。通过傅里叶红外光谱、紫外-可见光光谱等表征该高分子染料的结构及颜色特征,并详细探讨了该高分子染料及其涂层织物的pH响应变色性能。结果表明,刚果红高分子化后的最大吸收波长存在12 nm的红移。随着pH值降低,由于刚果红中氨基质子化并转变为醌式结构,高分子染料溶液的最大吸收波长由510 nm迁移至605 nm,吸收峰峰形变宽,颜色由红色变成蓝紫色。另外,该高分子染料涂层棉织物在pH值小于3的环境中逐渐变成蓝色,呈现出显著的pH响应变色行为、较高的变色灵敏度、良好的可逆性及pH响应长期稳定性,且能够循环使用于染色废水检测。     

感绿X光片用防光晕染料的合成

本文合成了3个用于感绿X光片的防光晕染料，其吸收波长在515～550m之间。并利用紫外、红外、高效液相色谱对其结构进行了鉴定。其中合成的不对称染料的最大吸收波长不是相应两个对称染料最大吸收波长的算数平均值，扩大了防光晕染料的选择范围。     

N,O-羧甲基壳聚糖改性水溶性高分子染料的制备与表征

通过在碱性条件下K型活性艳红(K-2BP)与具有两性聚电解质性质的N,O-羧甲基壳聚糖的反应制得了新型水溶性高分子染料。FT-IR和1H-NM R的表征表明,染料分子接枝到了N,O-羧甲基壳聚糖的骨架上。通过可见光分光光度法测定了K-2BP在0.1 m o l/L N a2CO3-0.1 m o l/L N aHCO3缓冲溶液中的最大吸收波长为526 nm,摩尔消光系数ε=18918.0 L/(m o l.cm),并以此为基础确定了K-2BP型高分子染料的接枝度为1∶10.4。     

近红外吸收功能菁染料的研究进展

主要综述了在近红外吸收功能菁染料的合成过程中所使用的缩合剂及其特点、典型合成反应,并且综合分析了菁染料最大吸收波长、稳定性与其结构的关系,简述了近红外吸收功能菁染料的应用途径,从中归纳出了近红外吸收功能菁染料的发展方向.     

高分子染料的合成与应用

高分子染料兼具染料和高聚物的优异特性,且具有不同于低分子染料的特殊染色性能,因此存在着巨大的研究与应用价值.较详细地阐述了高分子染料的合成方法及应用情况.     

可见激光立体光造型树脂协同引发体系引发机理的研究

用紫外／可见光谱及荧光／磷光光谱研究了在514nm波长下能引发丙烯酸－环氧树脂聚合的由染料，紫外光引发剂，叔胺组成的协同引发体系的引发机理，染料吸收可见光被激发，其激发三线态与叔胺形成激基复合物，并由此生成叔胺自由基，叔胺自由基与紫外引发剂发生电子转移作用生成活性更大的自由基引发聚合。     

一种含磺酸基席夫碱荧光探针的合成及性质

合成了一种含磺酸基席夫碱。通过核磁、红外光谱对其结构进行了表征,研究了其在不同溶剂中的紫外可见吸收光谱和荧光发射光谱及对过渡金属离子的识别。结果表明:在不同溶剂中紫外最大吸收波长发生红移,荧光最大发射波长发生蓝移,在丙酮和DMF(N,N-二甲基甲酰胺)溶剂中荧光发生猝灭;该席夫碱作为荧光探针分子对Fe~(3+)和Cu~(2+)有良好的识别作用。     

不对称防光晕染料的合成

合成了4个用于感绿X光片的不对称防光晕染料,其吸收波长在515～550nm之间,并利用紫外、红外、质谱、液相对其结构进行了鉴定。不对称染料的合成扩大了防光晕染料的选择范围,可减少染料用量。     

Degradation of methyl orange using short-wavelength UV irradiation with oxygen microbubbles

A novel wastewater treatment technique using 8 W low-pressure mercury lamps in the presence of uniform-sized microbubbles (diameter = 5.79 microm) was investigated for the decomposition of methyl orange as a model compound in aqueous solution. Photodegradation experiments were conducted with a BLB black light blue lamp (365 nm), a UV-C germicidal lamp (254 nm) and an ozone lamp (185 nm+254 nm) both with and without oxygen microbubbles. The results show that the oxygen microbubbles accelerated the decolorization rate of methyl orange under 185+254 nm irradiation. In contrast, the microbubbles under 365 and 254 nm irradiation were unaffected on the decolorization of methyl orange. It was found that the pseudo-zero order decolorization reaction constant in microbubble system is 2.1 times higher than that in conventional large bubble system. Total organic carbon (TOC) reduction rate of methyl orange was greatly enhanced by oxygen microbubble under 185+254 nm irradiation, however, TOC reduction rate by nitrogen microbubble was much slower than that with 185+254 nm irradiation only. Possible reaction mechanisms for the decolorization and mineralization of methyl orange both with oxygen and nitrogen mirobubbles were proposed in this study.     

Spectrophotometric determination of chlorpheniramine maleate and chlor-phenoxamine hydrochloride each in presence of caffeine as binary mixtures.

The dye-salt formation method was successfully applied to the determination of chlorpheniramine maleate and chlorphenoxamine hydrochloride each in presence of caffeine. At pH 5, the chromogens (λmax=420 nm) produced with methyl orange in chloroform obeyed Beer's law over the range 5-15 ug/ml and with relative SD less than 1%.     

生色光度法评价纳米光催化材料的光催化性能

基于纳米TiO2光催化材料在紫外光照射下产生的羟自由基（·OH）能定量将碘离子氧化成单质碘,单质碘与淀粉显色后在605nm有很强的可见光吸收性能,建立了一种快速评价光催化材料性能的生色光度分析方法。与褪色光度法相比,该生色光度的方法具有更高的灵敏度和更快的检测速度。用该法对几种市场的光催化材料样品进行光催化性能测定,结果与传统的甲基橙法相比较具有较好的相关性。     

水性聚氨酯-分散蓝14高分子染料的合成与性能

用聚氧化丙烯二醇、2,4-甲苯二异氰酸酯、二羟甲基丙酸、三乙胺和分散蓝14通过丙酮法合成了水性聚氨酯-分散蓝14(PU-DB14)高分子染料.红外和紫外-可见吸收光谱显示分散蓝14已被化学键入聚氨酯链中.研究还发现,PU-DB14水分散体的紫外-可见吸收光谱在760 nm处现一新吸收峰,可能与PU-DB14在水分散体中的形态有关.本文还用差热分析和广角X射线衍射对PU-DB14作了初步的性质表征.     

TiO2／膨胀石墨复合材料的制备及光催化性能的研穷

采用快速升温法制备出以膨胀石墨为载体的TiO2／膨胀石墨光催化剂，用SEM及XRD对其表面形貌及结构进行表征，研究了光催化剂在紫外光照射下的催化能力，探讨了目标降解物溶液的初始浓度及其pH值对光催化剂的降解能力的影响。结果发现，负载量为10％的光催化剂对40mg／L的亚甲基兰溶液5h的光降解率达到58．83％，甲基橙为51．12％。     

Covalent organic frameworks (COFs) quantum dots as supramolecular cages modified with biochar as nanobio photocatalyst for degradation of organic dyes

In this study, we used co-precipitation assisted solvothermal route to produce self-assembled covalent organic frameworks (COFs) quantum dots modified with biochar structures. In addition, photocatalytic degradation of organic dyes such as methyl red, methyl orange and methyl blue were measured without the need to artificial UV visible light in vitro condition, and degradation rate was estimated at alternate times. The biochar as precursor agent with hydrothermal method as an eco-friendly synthesis route used to provides COFs quantum dot nanostructures with appropriate diameter and size about 3.68 nm. This research presents a new and novel nanocomposite structures with the contribution of biochar as biological material for decolorization of methylene red, orange and blue were calculated using UV–vis spectroscopy. Novel covalent organic frameworks quantum dot membranes with high purity were synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transition electron microscopy (TEM), Atomic force microscopy (AFM), Fourier transformed infrared spectrum (FT-IR), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) and Brunauer–Emmett–Teller (BET) surface area analysis. Results clearly indicate which self-assembled COFs quantum dots as supramolecular cages modified with biochar synthesized with the cost-effective method act as a high performance photocatalyst for degradation of methylene red, orange and blue organic dyes.

     

溴麝香草酚蓝分光光度法测定短链季铵盐

本文研究了以氯仿萃取四乙基溴化铵与溴麝香草酚蓝的离子缔合物后,水相中溴麝香草酚蓝的吸光度与四乙基溴化铵浓度的关系。结果表明:在pH-6.0的NaH_2PO_4—Na_2HPO_4缓冲体系中,以氯仿萃取溴麝香草酚蓝和四乙基溴化铵形成的离子缔合物,水相中溴麝香草酚蓝的吸光度变化值与四乙基溴化铵含量呈线性关系。四乙基溴化铵浓度在4×10~(-5)～4×10~(-4)mol/L范围内符合比尔定律,线性方程为△A=7.40×10~3C—0.0054,r=0.999。应用此法直接测定膨润土有机化程度,结果满意。     

聚甲基丙烯酸二甲胺基乙酯与酸性金黄的超分子组装及性质研究

运用聚甲基丙烯酸二甲胺基乙酯（ＰＤＭＡＥ）的季胺盐（ＰＤＭＡＥＢ）在水溶液中与酸性金黄（ＭＹ）进行了组装,并制得相应的组装产物,傅立叶红外光谱表明复合物的确是通过静电作用复合形成的,未生成新的化学键。荧光发射光谱表明复合物乙醇溶液的荧光发射较碱性金黄乙醇溶液的荧光发射发生了蓝移。同时ＤＳＣ、Ｘ射线衍射实验还研究了这种复合物分子的凝聚态结构。     

Degradation of methyl orange through synergistic effect of zirconia nanotubes and ultrasonic wave

Zirconia nanotubes with a length of 25 μm, inner diameter of 80 nm, and wall thickness of 35 nm were prepared by anodization method in mixture of formamide and glycerol (volume ratio = 1:1) containing 1 wt% NH(4)F and 1 wt% H(2)O. Experiments showed that zirconia nanotubes and ultrasonic wave had synergistic degradation effect for methyl orange and the efficiency of ultrasonic wave increased by more than 7 times. The decolorization percentage was influenced by pH value of the solution. Methyl orange was easy to be degraded in acidic solution. The decolorization percentage of methyl orange reached 97.6% when degraded for 8h in 20mg/L methyl orange solution with optimal pH value 2. The reason of synergistic degradation effect for methyl orange might be that adsorption of methyl orange onto zirconia nanotubes resulted in the easy degradation of the methyl orange through ultrasonic wave.     

Mesocrystalline TiO<Subscript>2</Subscript>/sepiolite composites for the effective degradation of methyl orange and methylene blue

Mesocrystalline TiO₂/sepiolite (TiS) composites with the function of adsorption and degradation of liquid organic pollutants were successfully fabricated via a facile and low-cost solvothermal reaction. The prepared TiS composites were characterized by FESEM, HRTEM, XRD, XPS, N₂ adsorption-desorption, UV–vis DRS, and EPR. Results revealed the homogeneous dispersion of highly reactive TiO₂ mesocrystals on the sepiolite nanofibers. Thereinto each single–crystal–like TiO₂ mesocrystal comprised many [001]-oriented anatase nanoparticles about 10–20 nm in diameter. The photocatalytic activity was further evaluated by the degradation of anionic dye (methyl orange) and cationic dye (methylene blue) under the UV-vis light (350≤λ≤780 nm) irradiation. By selecting appropriate experimental conditions, we can easily manipulate the photocatalytic performance of TiS composites. The optimal TiS catalyst (the sepiolite content of 28.5 wt.%, and the reaction time of 24 h) could efficiently degrade methyl orange to 90.7% after 70 min, or methylene blue to 97.8% after 50 min, under UV-vis light irradiation. These results can be attributed to their synergistic effect of high crystallinity, large specific surface area, abundant hydroxyl radicals, and effective photogenerated charge separation.