New Phase Transfer Agent for Dye: Application for Hyperbranched Poly (ester-amine)

Hydrophilic hyperbranched poly(ester-amine) (HPEA) synthesized from diethanolamine and methyl acrylate was used as phase transfer agent for the first time to transfer methyl orange (MO) from water into chloroform. This process was quantified by UV-Vis spectra. A possible mechanism was put forward based on the formation of amphiphilic aggregates.

Investigation of energy transfer from pyrromethene dye to cresyl violet 670 in ethanol

In this paper, radiative and nonradiative energy transfer from laser dye pyrromethene 567 （PM567） and pyrromethene 580 （PM580） as donors to cresyl violet 670 （CV670） as acceptor in ethanol are investigated by using the steady-state emission measurement and the second harmonic generation （532 nm, ～ 13 ns） of a Q-switched Nd：YAG laser as the pumping source. The fluorescence intensity of the acceptor is improved due to the introduction of the donors, and the largest enhancement is obtained to be 128% in the PM567：CV670 dye mixture system. Energy transfer parameters, including the radiative and nonradiative energy transfer rate constants （KR and KNR）, critical distance （R0）, and half quenching concentration （[A]1/2） are investigated using the Stern–Volmer plots, and the acceptor concentration dependencies of radiative and nonradiative transfer efficiencies are also obtained. The values of KR for PM567：CV670 and PM580：CV670 systems are 2032.0×109 L·mol-1·s-1 and 2790.4×109 L·mol-1·s-1, respectively, and the values of corresponding KNR are 3.3×109 L·mol-1·s-1 and 4.2×109 L·mol-1·s-1, respectively. The results indicate that the dominant mechanism responsible for the energy transfer in the dye mixture systems is of the radiative type.

STUDY ON DYE TRANSFER ACROSS THE LIQUID-LIQUID INTERFACE

I. INTRODUCTIONStudies on the electrochemical phenomena at the liquid-liquid interface are a developing area in electrochemistry and electroanalytical chemistry. The exploration for new ion transfer systems is very important in the development of this area. Dyes are a large group of reagents used widely in analytical chemistry. But no paper deals with the tran,fer processes of dyes at the liquid-liquid (L/L) interface so far.

Charge and Energy Transfer in the Metal-free Indoline Dyes for Dye-sensitized Solar Cells

为敏化染料的太阳能电池的没有金属的 indoline 染料被采用量化学方法学习。地面的性质和没有金属的 indoline 的激动的状态的比较学习为染料染 -- 揭示的敏化的太阳能电池：rhodanine 的数字包围增加，人之间的精力差别和 LUMO 减少，在有有约束力的精力的吸收光谱有红移动的(i) 增加了，并且转变偶极子时刻减少了；(ii ) 把微分密度基于充电的分析，我们观察到费用和精力从 phenylethenyl 被转移到 indoline， rhodanine 响；(iii ) 电子洞连贯主要在 indoline 和 rhodanine 戒指上，并且激子尺寸分别地是为有一和二枚 rhodanline 戒指的 indoline 染料的 30 和 40 个原子。这些结果为敏化染料的太阳能电池在没有金属的 indoline 染料用作电脑辅助的设计的一个好例子。

影响植物蒸染转印染着色因素实验研究

植物转印染拥有古老而深厚的历史文化底蕴,其工艺过程不会产生污染物质,属于绿色环保的染整技术,符合当下大环境的政策要求和市场需求。为了提高植物转印染的品质与效率,进而拓展其在纺织产品中的应用,探索其在织物上的染色效果是一个重要的研究课题。文章通过系列的变量实验分析出不同因素对植物蒸染转印染着色效果所造成的影响,得出科学的一般结论,可直接应用于后期更深层次的植物蒸染转印染研究与应用中。

基于阴阳离子染料对的光捕获体系构建及其在光催化CDC反应中的应用研究

针对荧光素类染料单独使用中存在光响应范围窄、能量利用率低等问题,利用离子染料之间的静电作用力构建阴阳离子染料对光捕获体系,探究光捕获体系对交叉脱氢偶联(CDC)反应的催化性能及其影响因素。结果表明,染料间阴、阳离子的相互作用可形成稳定的光捕获体系,以阴、阳离子染料玫瑰红(RB)和吖啶橙(AO)为受体和供体构建了光捕获体系“D_(AO)^(+)A_(RB)^(-)”(浓度为2×10^(-5)mol/L),其荧光共振能量转移(FRET)效率可达72%。光捕获体系的荧光共振能量转移(FRET)过程可有效拓宽光响应范围、提高受体光催化性能,“D_(AO)^(+)A_(RB)^(-)”体系对CDC反应展现出优异的光催化性能,其光催化反应速率是以RB为催化剂时的1.60倍。

除油剂DM-1134T在涤纶针织物上的应用

重点介绍多功能除油剂DM-1134T的应用性能,并用于涤纶针织布除油染色同浴加工工艺,探讨除油效果、高温乳化性、高温分散性、移染性、除油防返沾性等。结果表明,所得产品染色均匀,对色光影响小,能有效解决短流程同浴工艺常出现的油剂返沾、染料凝聚、色点色斑等问题;具有降低成本、缩短工序、方便使用、稳定质量、减少缸差等优点。

DYE-SENSITIZED PHOTOPOLYMERIZATION OF METHYL METHACRYLATE INITIATED BY COUMARIN DYE/IODONIUM SALT SYSTEM

The photosensitive initiating system composed of 7-diethylamino-3-(2'-benzimidazolyl)coumarin dye (DEDC) and diphenyliodonium hexafluorophosphate (DIHP) which act as the sensitizer and the initiator respectively, can be used to initiate the polymerization of methyl methacrylate (MMA). The results showed that when exposed to visible light, coumarin dye/iodonium salt undergoes quick electron transfer from DEDC to DIHP and free radicals are produced. The visible light photoinduced reaction between DEDC and DIHP is mainly through the excited singlet state of DEDC and thus it is a little sensitive to O-2. The influence of concentration of DEDC, DIHP and MMA on the rate of photopolymerization of MMA was also investigated.

Fast Optical Switching Using Oriented Cyanine Dye-Doped Nematic Liquid Crystal

A cyanine dye, 2-[7-（1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene）-1,3,5-heptatrienyl]-1,3,3-trimethyl-3H-indolium iodide （NK-125）, is doped in 4-cyano-4＇-pentylbiphenyl （5 CB）, and the mixture is sandwiched between two pieces of rubbed glass plates. The third-order nonlinear optical properties of the oriented NK-125-SCB layers are measured by the resonant femtosecond degenerate four-wave mixing （DFWM） technique at 760 nm. The third-order nonlinear optical susceptibility of one of the present samples is 5.5×10^-8 esu. The slow DFWM response of the NK-125-SCB layers due to a population grating is accelerated by the increasing laser power because of amplified spontaneous emission （ASE）. On the other hand, we do not observe a similar phenomenon for NK-125- polyethylene glycol （PEG-400）. Oriented NK-125 molecules in nematic liquid crystals must have very high ASE efficiency. Hence the population grating in a DFWM signal disappears within about 4 ps. It is expected that NK-125-SCB can be used as a material for very fast all-optical switching.

热转移数码印花墨水的制备及性能研究

本研究制备一种性能优良的分散黄染料热转移印花墨水。首先选取了C.I.分散黄60染料、C.I.分散黄54两种染料和水性丙烯酸树脂、水性聚氨酯树脂两种树脂,探究染料种类与树脂种类对墨水的热升华性能与分散性能的影响。通过调节染料与树脂的比例,得到最佳的墨水配方和最佳的转印条件。结果表明,选用C.I.分散黄60染料和水性丙烯酸树脂作为油墨的染料与树脂,水性丙烯酸树脂与C.I.分散黄60的质量比为1∶0.05,研磨时间为8min时,C.I.分散黄60染料的分散效果最佳,墨水的粒径最小。本研究制备的热转移数码印花墨水在190℃下转印30s后转印图案清晰,图文效果良好,丰富了黄色染料热转移墨水的配方。

Fabrication and Fluorescence Study of Sensitizing Dye/TiO_2 Films

Fluorescence spectra of the sensitizing dye/ TiO2 bilayer films were studied. Charge-transfer complexes were formed in the above bilayer.

Properties of Novel Reactive Transfer Printing of Silk

The novel reactive transfer printing of silk was carried out through a hot-press adhesion and steaming.The special transfer paper was prepared by coating the paste mainly containing hot-melt adhesive high-substituted hydroxypropyl cellulose(H-HPC) and printing thickener carboxymethyl cellulose(CMC).The effects of each ingredient in the paste on color yield of the prints and dye penetration were investigated.The major results indicate that,color yield is chiefly governed by the adhesion extent imparted by H-HPC,the type of fixing alkaline agent,and the content of urea.Trichloroacetic acid(TCAA) as the fixing alkaline agent and adding5%urea can enhance the color depth obviously.Dye penetration depends on the coating quantity on the transfer paper,the contents of urea and dicyandiamide.The printed silk possesses a higher color yield,color fastness of grade 3 or above,clear sharpness,and good handle when the paste contains 3%H-HPC,0.7%CMC,3%TCAA,5%urea,3%dicyandiamide,and 0.5%physical sorbent nano-silica.

Adsorptive Mass Transport of Dye on Rice Husk Ash

Experimentations have been carried out to characterize the adsorption of Methylene Blue (MB) and Congo Red (CR) dyes in the aqueous phase onto Rice Husk Ash (RHA). Theoretically analyses are also made for describing the sorption and diffusion processes. The effective pore diffusivities of the dye molecules studied in RHA are determined by a suitable global optimization technique. The depth of penetration, on the other hand, has been estimated for various initial concentrations of dyes. Theoretically predicted concentration pro-files are compared with the experimental values at different initial concentrations of these dyes. Such com-parative studies indicate that the predicted values are in excellent agreement with the experimental values.

DYE-SENSITIZED PHOTOLYSIS OF o-Cl-HEXAARYLBIIMIDAZOLE AND PHOTOPOLYMERIZATION KINETICS STUDY OF THE LONG WAVE-LENGTH DYE/HEXAARYLBIIMIDAZOLE SYSTEMS

o-Chloro-hexaarylbiimidazole (o-Cl-HABI) can be sensitized efficiently by the dyes 1-ethyl-3'-methyl thiacyanine bromide (C1), 3,3'-diethyl thiacarbocyanine iodide (C2), and cyclopentanone 2,5-bis[2-(1,3 -dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene] (C3) through electron transfer proceses. When exposed to a xenon lamp (filtered by Pyrex glass), the photosensitive systems composed of o-Cl-HABI and the above dyes can produce free radicals which initiate the polymerization of MMA. The photopolymerization kinetics equation was obtained for the o-Cl-HABI/C2 system, R-p = K [C2](0.75)[o-Cl-HABI](0.44)[MTA](0.12)[MMA](1.0). A comparison of the influence of different dyes on the conversion of MMA photopolymerization was conducted.

Morphological and Electromyogram Analysis for the Spinal Accessory Nerve Transfer to the Suprascapular Nerve in Rats

For many years, nerve transfer has been commonly used as a treatment option following peripheral nerve injury, although the precise mechanism underlying successful nerve transfer is not yet clear. We developed an animal model to investigate the mechanism underlying nerve transfer between branches of the spinal accessory nerve (Ac) and suprascapular nerve (Ss) in rats, so that we could observe changes in the number of motor neurons, investigate the 3-dimensional localization of neurons in the anterior horn of the spinal cord, and perform an electromyogram (EMG) of the supraspinatus muscle before and after nerve transfer treatment. The present experiment showed a clear reduction in the number of γ motor neurons. The distributional portion of motor neurons following nerve transfer was mainly within the neuron column innervating the trapezius. Some neurons innervating the supraspinatus muscle also survived post-transfer. Compared with the non-operated group, the EMG restoration rate of the supraspinatus muscle following nerve transfer was 60% in the experimental group and 80% in a surgical control group. Following nerve transfer, there was a distinct reduction in the number of γ motor neurons. Therefore, γ motor neurons may have important effects on the recovery of muscular strength following nerve transfer. Moreover, because the neurons located in regions innervating either the trapezius or supraspinatus muscle were labeled after Ac transfer to Ss, we also suggest that indistinct axon regeneration mechanisms exist in the spinal cord following peripheral nerve transfer.

Fabrication of Semiconductor Polymer Membranes Combined with a Colored Charge Transfer Complexes Used in the Manufacture of Solar Cells as a Source of Alternative Energy

The main task of this article was to prepared of new pigment model in situ solar cells accordance to charge-transfer complexes of rhodamine C(RhC) donor as dye laser gain media with iodine(σ-acceptor) and chloranilic acid, CLA(π-acceptor). The synthesis stoichiometry of these complexes were of 1∶2(donor∶acceptor) with general formulas [(RhC)]I·I3 and [(RhC)(CLA)2]. The discussed data of elemental analysis, conductivity measurements, FT-IR, UV-Vis spectroscopy and photometric titration data visualized the stoichiometry, formula and complexity of the complexes. The physicochemical and spectroscopic analyses obtained suggested that the electron transfer occurred through nitrogen atom in a tertiary amine —N(C2H5)2 of RhC donor with acceptor. The synthesized solid complexes were under go to thermogravimetric analyses to investigate their thermal stability and decomposition steps. The molar conductance measurements revealed that RhC complexes have an electrolytic statement. The thermal stability of rhodamine C complexes was enhanced in comparable with RhC itself. The polymer membranes of poly-methyl methacrylate)(PMMA) combined with the RhC charge(transfer complexes in chloroform solvent have been prepared and characterized by(infrared & electronic) spectroscopy and scanning electron microscopy(SEM) morphological examination. The photo-stability properties of the RhC complexes have been investigated.

ZnO/g-C_(3)N_(4)复合物制备及其光催化降解罗丹明B性能

以ZnO和C_(3)H_(6)N_(6)为原料,将两者按一定质量比混合得到前驱物,通过煅烧该前驱物可成功获得ZnO/g-C_(3)N_(4)复合物.采用XRD、SEM、UV-Vis和BET等方法对复合物的物相、形貌、组成、可见光吸收性能以及比表面积大小等进行表征.以罗丹明B(RhB)为目标污染物,在可见光激发下,探究了不同g-C_(3)N_(4)负载量的ZnO/g-C_(3)N_(4)复合物的光催化性能.结果表明,g-C_(3)N_(4)含量约为10%的复合物光催化降解RhB效果最好,30 min左右降解率接近100%,两种半导体复合能够实现光学性能上的优势互补.

三氢-苯并吲哚啉方酸染料晶体中电荷转移过程的理论研究

由于具有良好的光化学稳定性、在可见光区和近红外区的强吸光性等优点,方酸类染料是目前最具潜力的小分子有机太阳能电池给体材料之一.然而,其空穴迁移机制并不明确,较低的迁移率限制了器件光电转换效率的提升.结合第一性原理计算、Marcus电子转移理论、主方程模拟,系统研究了三氢-苯并吲哚啉方酸(USQ-BI)染料的电子结构、分子堆积模式以及电荷转移性质.结果表明,由于空穴迁移路径上交替出现两种不同的分子堆积模式,驱动力呈现正负交错的特征,克服正驱动力的过程为空穴迁移的决速步.据此,提出了降低驱动力绝对值以增大迁移率的理论策略.进一步研究发现,在一些位点上引入氰基可以显著提高空穴转移耦合强度,从而提高空穴迁移率.最后,对USQ-BI中电子转移过程的研究发现,由于较大的重组能导致较小的电子转移速率,该晶体不能作为好的电子传输材料.

基于电化学高级氧化技术的洗衣机洗护效果研究

将可以产生羟基自由基(·OH)电化学高级氧化技术运用于洗衣机,利用·OH的强氧化性实现洗衣机防串色、白衣净白、除菌、抑菌、提升特殊污渍洗净比等功能。全面评价了搭载电化学氧化技术洗衣机的洗护效果,结果表明:搭载电化学高级氧化技术的洗衣机可有效防串色、提升白色衣物的洗后白度、低能耗除菌、48 h抑菌、提升特殊污渍的洗净效果,且洗涤有色衣物无褪色风险。此外,·OH还可降解洗涤废水中的染料,具有良好的环保价值。