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。     

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.     

聚—N—乙基—4—乙烯基吡啶／甲基橙复合物染料的合成及性？…

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４０ｎｍ。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。     

4—双—（1—对—磺苯基—3—羧基吡唑酮—5）—三甲川氧醇染料四钾盐的合成

本文介绍了防光晕染料４－双－（１－对－磺苯基－３－羧基吡唑酮－５）－三甲川醇染料四钾盐的合成方法和提纯方法。     

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.     

氦氖激光扫描CT片防光晕层染料的合成和应用

本文介绍了防光晕染料1，1'-二对碘酸苯基-3，3'-二甲基吡唑啉酮[5]五甲川氧醇的合成，及其在氦氖激光扫描CT片中的应用。     

依尔福胶卷FP4的防光晕浅析

用三种测定反射光晕的方法,对国外高清晰度黑白中速胶卷FP4进行了测试。该胶片微观性能中的一个重要因素是防光晕效果有明显改善;通过光谱感光度曲线和染料光谱吸收曲线证实:FP4防光晕层的染料光谱吸收峰与乳剂增感峰匹配良好,紫外区有很强的吸收峰,总的密度值也较高。为进行对比,引入了国内胶片HD—3作平行测试。     

吸光染料

吸光染料是一种具有一定吸收光谱的有色染料,根据其在胶片中的不同用途而有不同名称。吸光染料加在乳剂中用以吸收卤化银颗粒表面所产生的散射和漫射光,从而提高胶片的解象力和清晰度。起内部防光晕作用的常称之为内防光晕染料。     

涤纶片基防光晕层

涤纶片基防光晕层与三醋片基防光晕层的作用一样,因此,对涤纶片基防光晕层的要求与三醋片基也一样,都是: (1)吸收光线波长的范围与感光材料吸收光线波长的范围相同, (2)防光晕层在处理浴(前浴、显影浴、水洗)中必须完全除去; (3)对乳剂无不良的影响; (4)必须具有足够的机械性质,如耐磨、抗划伤,和平滑性; (5)收卷后防光晕层与乳剂层相接     

方酸菁染料近红外吸收性能研究

方酸可与含供电子基团的物质,如芳胺、酚、含氮杂环化合物等发生缩合反应,生成一系列吸收波长在近红外区的新型方酸菁染料.该类染料具有独特的光学性能,良好的光、热稳定性和近红外吸收性能.影响方酸菁染料近红外吸收性能的主要因素包括方酸菁染料的基本结构(对称型与非对称型)、取代基的种类(端基包括胺、富电芳环、活泼双键以及活泼甲基)及染料在不同溶剂中的聚集行为.     

海泡石矿物含量对海泡石/聚丙烯酸(钠)复合材料吸水保水性能的影响

利用水溶液聚合法制备了海泡石粘土/聚丙烯酸(钠)高吸水保水复合材料,研究了海泡石粘土在0%~10%及20%~150%添加量范围对复合材料的吸水保水、重复吸水及抗电解质溶液性能的影响。结果表明,海泡石添加量在4%和40%~60%范围时,复合材料的吸蒸馏水倍率达到极大值。海泡石添加量大于60%时,复合材料吸水倍率急剧下降。复合材料的保水率随着海泡石添加量的增加而小幅增加;海泡石粘土添加量在40%~60%范围时,复合材料的重复吸水性能比较稳定;复合材料吸蒸馏水的倍率随各电解质溶液离子强度的升高而不断降低,且海泡石粘土添加量高的复合材料对外界溶液离子强度的敏感程度较高。     

Methoxyphenyl indenopyrazoloquinoline derivatives as green fluorescent emitters for polymer based electroluminescent devices

Paper reports synthesis aspects and spectroscopic properties of three newly synthesized trimethyl derivatives of methoxyphenyl indenopyrazoloquinoline (MPTM-IPQ) compounds representing a subclass of azafluoranthene dyes. The spectroscopic studies are supplemented by cyclic voltammetry measurements and quantum-chemical calculations using DFT/TDDFT/PCM method at the B3LYP/6-31+G(d,p) level of theory. The absorption/fluorescence processes appear to be weakly dependent on the side position of the methyl radicals exhibiting the first absorption band in the region of 445-450 nm and the fluorescence band in the range of 530-540 nm. A considerable Stokes shift (85-100 nm) originates in all the dyes mainly from the solute relaxation in the excited state. The electroluminescence devices with an active PVK layer doped by MPTM-IPQ dyes have been designed. All the devices exhibit green electroluminescence with the emission maximum being rather weakly dependent on the type of the fluorescent dopant. The obtained results demonstrate that a series of newly synthesized MPTM-IPQ dyes may be considered as perspective green fluorescent emitters for electroluminescent applications.     

High-energy sensitivity enhancement in panchromatic photopolymers for holography using a mixture of visiblelight photoinitiators

Abstract

A new aqueous photopolymer containing the monomers acrylamide, N,N'-methylenbisacrylamide and zinc acrylate, the initiators 4,5-diiodosuccinylfluorescein (2ISF) and methylene blue (MB), and the coinitiator sodium p-toluenesulphinate is described. This formulation exhibits a clear enhancement of the high-energy sensitivity upon irradiation with 514 or 633 nm light (Ar⁺ laser or He–Ne laser respectively), with respect to the same mixture but with only one of the two dyes, reaching maximum diffraction efficiencies of 15–20% with 15–60 mJ cm^?2. This enhancement is explained by the more efficient photogeneration of initiator radicals by the ground-state formation of an ion-pair complex between cationic (MB) and anionic (2ISF) chromophores. This must compensate the observed decrease in the absorbance of the mixture of the two dyes at 514 nm, with respect to the absorbance of the same medium but with only 2ISF (maximum absorption at 490 nm). A clear absorbance increase at 633 nm, with respect to the absorbance of this system with only MB (maximum absorption at 660 nm), must also favour photopolymerization.     

辐射变色薄膜紫外剂量计研究

以聚乙烯醇缩丁醛(PVB)为基质,以高敏性类丁二炔化合物为主要有机染色材料,添加适当比例光引发剂,成功研制了一种高感度新型辐射变色膜.用CL-1000型紫外线交联仪进行紫外线辐照后,薄膜颜色由粉红渐变为蓝色,且随着辐照剂量的增加颜色深度递增.经分光光度计测试其吸收光谱,发现主吸收峰值出现在650nm附近,且在相同的紫外线能量密度下,吸收峰处的响应吸光度与辐照时间成线性响应关系.在相同的辐照时间内,吸收峰处的响应吸光度与紫外线能量密度亦成线性关系.染色材料中添加适当比例的光引发剂,可以提高薄膜的响应吸光度,进而提高其响应灵敏度.对于变色层厚度为30～60μm的辐射变色膜,敏感层厚度与吸光度响应成正相关性.室温下避光贮存60天内,此新型辐射变色膜具有较好的稳定性与可重复性.     

聚（丙烯酸-CO-丙烯酰胺）／腐殖酸钠／高岭土复合高吸水性树脂的制备及溶胀行为

以N,N′-亚甲基双丙烯酰胺为交联剂、过硫酸铵为引发剂,采用水溶液聚合法合成了聚(丙烯酸-co-丙烯酰胺)/腐殖酸钠/高岭土多功能复合高吸水性树脂。研究了腐殖酸钠和高岭土含量对吸水倍率的影响,同时考察了该树脂的吸水速率及溶液pH值和不同阴阳离子对吸水倍率的影响。结果表明,在腐殖酸钠∶高岭土=2∶3(质量比)时树脂具有最高的吸水倍率,其吸蒸馏水和0.9%(质量分数)NaCl溶液分别达到450 g/g和39 g/g。     

Fabrication and characterization of dye mixture doped polymer optical fiber as a broad wavelength optical amplifier

Rhodamine 6G and Rhodamine B dye mixture doped polymer optical fiber amplifier (POFA), which can operate in a broad wavelength region (60 nm), has been successfully fabricated and tested. Tunable operation of the amplifier over a broad wavelength region is achieved by mixing different ratios of the dyes. The dye doped POFA is pumped axially using 532 nm, 10 ns laser pulses from a frequency doubled Q-switched Nd: YAG laser and the signals are taken from an optical parametric oscillator. A maximum gain of 22.3 dB at 617 nm wavelength has been obtained for a 7 cm long dye mixture doped POFA. The effects of pump energy and length of the fiber on the performance of the fiber amplifier are also studied. There exists an optimum length for which the amplifier gain is at a maximum value.     

Electrochemical coagulation for textile effluent decolorization

The three most commonly used dyestuffs in textile industry are reactive, acid, and dispersed dyes. One dye from each group, C.I. Reactive Blue-19, C.I. Acid Red-266, and C.I. Disperse Yellow-218 was chosen to study the feasibility of coagulation for color removal. The dyes used in these experiments were chosen to represent the two major structural features: anthraquinone and azo dyes. Reactive Blue is an anthraquinone-based dye, and Acid Red and Disperse Yellow represent azo-based dyes. As there is no standard method to measure the color intensity, a Hach spectrophotometer was used to measure the absorbance before and after the dye solution was treated. Removal efficiencies on these dyes were obtained by measuring absorbance of a sample at 592 nm for Reactive Blue, 498 nm for Acid Red, and 428 nm for Disperse Yellow. Aluminum and ferric coagulants were produced in a parallel-plate electrochemical reactor by anodic dissolution. Removal efficiencies of more than 98%, in terms of absorbance, were observed in laboratory conditions. Removal was found highly dependent upon NaCl concentration, applied voltage, current density, and pH. The NaCl in the solution effectively reduced the power consumption and promoted the coagulant generation by depasivating the Al-water and Fe-water electrochemical systems. The processes were determined to be highly NaCl dependent. A mechanism was proposed for the corresponding liquid phase chemistry.     

吸收型近红外滤光薄膜的制备与性能

以聚甲基丙烯酸甲酯(PMMA)为基体,近红外吸收染料NIR756和NIR858为添加剂,采用熔融混合、分散成型的方法制备了近红外吸收滤光薄膜。热失重分析(TG)表明,两种染料都具有较好的热稳定性。透射光谱显示,试样薄膜具有较好的近红外吸收性能,在660nm~930nm波段平均光透过率低于0.2%;同时具有较高的可见光透过率,在400nm~630nm波段平均光透过率高于20%。薄膜具有较好的耐热老化性能。近红外吸收染料在基材中的分散不均匀,有颗粒存在。