荧光黄染料荧光性能影响因素的研究

探讨染料用量、醇、pH调节剂和表面活性剂等对荧光黄染料荧光性能的影响。测试了不同实验条件下,荧光黄染料的荧光强度。结果表明,荧光黄染料的荧光强度随染料浓度的增加而增加,但当染料质量分数超过0.6%后,有下降的趋势;加入3%的醇类有机溶剂后,染料荧光强度降低幅度超过10%;染料的荧光强度随pH的增加而减少,并在pH为7~9时,基本保持不变;加入适量表面活性剂后,染料荧光强度有增强的趋势。     

具有D-π-A结构硼氟染料的制备及光谱性能研究

以2-甲基-8-苯并咪唑基喹啉和4-甲酰基三苯胺为反应物,合成了硼氟荧光染料,并通过核磁共振氢谱、碳谱、质谱进行了结构鉴定。通过紫外-可见光吸收及荧光光谱测试表明,染料在非极性溶剂(甲苯)中的Stokes位移为96 nm,荧光量子产率为0.638;在极性溶剂(甲醇)中的Stokes位移为162 nm,荧光量子产率为0.003;在固态下呈现较强的荧光,Stokes位移为178 nm。     

萘酰亚胺树枝状聚(胺-酯)对染料的荧光增强作用

以乙二胺(EDA)、三羟甲基丙烷三丙烯酸酯(TMPTA)和1,8-萘二甲酸酐为原料,合成了萘酰亚胺树枝状聚(胺-酯)[PAE-1,8-NL]。考察了PAE-1,8-NL与染料(曙红B、罗丹明B、达旦黄、亚甲基蓝和甲基橙)组成的能量转移体系中,染料荧光强度的变化。结果表明,PAE-1,8-NL作用于染料的DMF溶液,荧光强度增强;且随着PAE-1,8-NL浓度的增大,荧光强度先增强后减小。增强作用大小为:亚甲基蓝>罗丹明B>甲基橙>曙红B>达旦黄。在DMF、丙酮和乙腈溶剂中,PAE-1,8-NL对染料的荧光强度增强作用不同。     

溶胀法制备高强度聚苯乙烯荧光及编码微球

通过对荧光微球制备的传统溶胀法的改进,以二氯甲烷作溶胀剂,0.25%SDS水溶液作分散体系(促进疏水性染料溶胀进入种子微球以增加微球荧光强度),制备出了荧光强度高,单分散性好(平均粒径3.6μm,变异系数3.7%),光学性质稳定,定量染色的绿色、橙色、红色三种荧光微球。将发生荧光共振能量转移的两种染料同时溶胀进种子微球中,制备了能产生双荧光信号的荧光编码微球。     

天然纤维素荧光微球的制备及荧光性能研究

采用绿色环保的碱、尿素、水溶剂体系溶解天然纤维素,利用高压静电法得到再生纤维素微球,通过物理包埋和化学键合两种方式成功对纤维素微球进行了荧光功能化。物理包埋法将纤维素溶液与染料共混,在微球高压静电喷雾成型过程负载罗丹明荧光染料,微球呈现强的橘红色荧光,其最大荧光发射波长与单纯罗丹明水溶液相比发生蓝移;化学键合法以环氧氯丙烷为连接剂在天然纤维素表面引入异硫氰酸荧光素酯(FI-TC),荧光显微镜观察显示微球呈现强的绿色荧光,在水溶剂化作用下,化学键合在微球表面的染料与单纯FITC溶液的荧光发射光谱无明显差别。物理负载方式可实现微球的高染料负载量,为10%(wt),但存在荧光染料的泄漏问题;化学负载方式染料共价键结合,无泄漏问题,但染料负载量较低,约为0.2%(wt)。     

分散荧光染料色浆的制备及稳定性能

以苯并吡喃类分散荧光染料和萘磺酸类阴离子分散剂为原料,通过湿磨法制备分散荧光染料色浆,并研究其色浆稳定性能,以制备荧光喷墨印花墨水。结果表明,随研磨时间延长,4种分散荧光染料色浆的粒径和荧光强度均有所降低。分散荧光桃红BG色浆离心50 min后的比吸光度仍达到78.1%,离心稳定性较好。在55℃条件下放置5 d后分散荧光染料色浆的粒径有所增加,其中分散荧光桃红BG染料色浆粒径的增加率仅为7.5%,染料色浆热稳定性能较好;加热处理过后分散荧光染料色浆的荧光强度有所降低。综合比较,分散荧光桃红BG染料色浆的稳定性能良好,更加适用于喷墨印花墨水的配制。     

适用于纺织荧光染色的染料及其应用进展

荧光染料凭借发射强度高、色彩鲜艳、荧光强烈等特点,在纺织领域吸引了许多染料专家的目光,是一类非常具有应用前景的功能性染料。该文按染料结构分类的方式综述了从上世纪至今商品化分散、酸性和活性荧光染料以及1,8-萘酰亚胺类、香豆素类、半花菁类和其他类荧光染料及其衍生物在纺织染色领域的研究进展。最后提出适用于纺织荧光染色的染料在纺织领域未来的发展趋势。     

壳聚糖支载菁染料荧光探针及荧光特性

壳聚糖支载有机荧光染料可在生理条件下改变其荧光特性,本文采用壳聚糖(CTS)支载有机荧光染料Cy3,利用红外光谱和热分析对产物进行了表征,研究了壳聚糖支载的荧光染料紫外吸收光谱和荧光光谱特性,结果表明,壳聚糖支载的荧光染料Cy3的紫外吸收特征峰的波长无明显变化,荧光强度明显增强,支载后的荧光染料光稳定性良好,初步细胞标记实验显示,壳聚糖支载后的Cy3染料对脑胶质瘤细胞具有良好的亲和性,并能穿透细胞膜且发出明显荧光。     

水杨醛席夫碱荧光化合物的合成及其印花性能

以水杨醛、1,6-己二胺和邻苯二胺为原料,通过醛基与氨基的缩合反应合成了水杨醛席夫碱荧光化合物——水杨醛缩己二胺席夫碱(SSB1)和水杨醛缩邻苯二胺席夫碱(SSB2),并将化合物SSB2制成不同质量分数荧光染料的印花浆对棉织物进行印花处理.对所得化合物进行了表面形貌、化学结构、色谱及热稳定性表征,测试了SSB2荧光印花棉织物的荧光性、颜色、色牢度.结果表明,SSB1、SSB2的产率分别为88.8％和86.0％,相对最大荧光强度分别为8305 a.u.和5444 a.u.,相转变温度分别为75和165℃;所得SSB2荧光印花棉织物耐皂洗牢度最高可达4级,SSB2荧光染料质量分数为10％时,达到最佳的颜色深度和荧光强度.     

水溶性吲哚菁染料的合成、光谱性能及其应用

设计、合成了3种水溶性吲哚菁染料(发射波长:690 nm),用核磁共振波谱(NMR)对其进行了表征,测试了菁染料在不同溶剂中的紫外吸收光谱和荧光发射光谱;为了探讨菁染料在生物分析领域的应用性,测定3种菁染料在十六烷基三甲基溴化铵(CTAB)和十二烷基磺酸钠(SDS)两种表面活性剂胶束模拟的生理条件下的吸收和发射光谱,利用循环伏安法(CV)测定了菁染料的光稳定性,在近红外区域观察了染料对肾癌细胞的活细胞染色性能,并计算了3种菁染料的摩尔吸光系数和荧光量子产率。     

水溶性吲哚菁染料的合成、光谱性能及其应用的研究

设计、合成了3种水溶性吲哚菁染料（发射波长：690 nm）,用核磁共振（NMR）对其进行了表征,测试了菁染料在不同溶剂中的紫外吸收光谱和荧光发射光谱;为了探讨菁染料在生物分析领域的应用性,测定3种菁染料在十六烷基三甲基溴化铵（CTAB）和十二烷基磺酸钠（SDS）两种表面活性剂胶束模拟的生理条件下的吸收和发射光谱,利用循环伏安法（CV）测定了菁染料的光稳定性,在近红外区域观察了染料对肾癌细胞的活细胞染色性能,并计算了3种菁染料的摩尔吸光系数和荧光量子产率。     

新型溴代长波长BODIPY类荧光染料的合成及表征

通过吡咯和乙酰氯经一步法合成了含吡咯取代基的长波长BODIPY染料,溴化后得到一溴和二溴染料,染料通过质谱、二维核磁等手段进行了结构表征.测试了这些染料的吸收光谱和发射光谱,研究了不同极性的溶剂对染料光谱性能的溶剂化效应以及Br原子对染料光谱的重原子效应.结果表明:随着溶剂极性的增大所合成的染料吸收波长均发生了蓝移,发射波长变化不大,摩尔消光系数逐渐增大,荧光量子产率逐渐减小,表现出明显的溶剂化效应;在同一溶剂中,随着染料结构中Br原子取代基数目的增加,发射波长发生红移,吸收波长变化不大,摩尔消光系数逐渐增大,荧光量子产率逐渐减小,表现出明显的重原子效应.     

Synthesis, absorption and fluorescence properties of N-triazinyl derivatives of 2-aminoanthracene

N-(4,6-dichloro-1,3,5-triazin-2-yl)-2-aminoanthracene was synthesized by substitution of one chlorine atom of 2,4,6-trichloro-1,3,5-triazine with 2-aminoanthracene. A new series of N-triazinyl-2-aminoanthracenes was prepared by nucleophilic substitution of one or both chlorine atoms on N-(4,6-dichloro-1,3,5-triazin-2-yl)-2-aminoanthracene with electron-donating methoxy or phenylamino groups. The UV/Vis absorption, fluorescence and excitation spectra as well as the fluorescence quantum yields of the prepared compounds were measured in 1,4-dioxane, ethyl acetate, dibutyl ether and acetonitrile; nanosecond kinetics of the fluorescence decay was measured in different solvents. The influence of the character of the substituent on triazinyl ring and of the solvent polarity upon the absorption and fluorescence spectra and fluorescence quantum yields are discussed.     

溶剂对三苯二噁嗪化合物荧光性能的影响

本文测试了两个三苯二(口恶)嗪化合物在18种溶剂中的电子吸收光谱和荧光发射光谱。计算了这些化合物的荧光量子产率。发现化合物的荧光光谱的ν_(max)~F与溶剂的(n~2—1)/(2n~2+1)和E_T(30)以及化合物的荧光光谱的Stokes位移△ν_s与溶剂的E_T(30)均存在着良好的线性关系。醇类溶剂与溶质间的氢键作用以及含卤素溶剂的“外部重原子效应”导致     

Synthesis and characterisation of benzothiazole‐based solid‐state fluorescent azo dyes

Novel solid‐state fluorescent azo dyes containing a 2‐[4‐(dimethylamino)phenyl]benzo[d]thiazol‐6‐amine as the electron donor group were synthesised. These dyes showed a molar extinction coefficient in the range of 20 000–30 000 l/mol/cm. These compounds were characterised by strong solid‐state fluorescence under long ultraviolet light (365 nm). Absorption and fluorescence spectra revealed that electron coupling originating from broad π‐electron delocalisation and the keto–enol form is responsible for the large Stokes shift. These dyes were readily soluble in common solvents such as dichloromethane, chloroform, dimethyl formamide , tetrahydrofuran and dimethyl sulphoxide and were characterised by means of elemental analysis, proton nuclear magnetic resonance and mass spectrometry. Thermogravimetric analysis of solid‐state fluorescent dyes show thermal stability up to 270 °C and can therefore be used for polymer application. The coloristic properties of these dyes were evaluated on polyester by the disperse dyeing method.     

苯并吲哚二碳菁染料的合成及性质研究

为合成了2种新型的多甲川链上含氯取代的对称型苯并吲哚二碳菁染料,通过紫外-可见光谱、红外光谱、氢核磁共振谱和质谱对所得产物进行了表征。用紫外-可见光谱仪研究了溶剂、温度及光照时间对这2种染料吸收光谱的影响。结果表明,随着溶剂折射率n的增大,2种染料的最大吸收波长均有一定的红移;与阴离子为p-CH3C6H4SO3-的染料比较,阴离子为PF6-的染料具有较大的摩尔消光系数[λmax=676 nm,ε=2.45×105mol/(L.cm)]和良好的光、热稳定性。为合成稳定的、性能优良的光存储介质提供了实验基础。     

A comparison of the absorption spectra of a series of blue disperse dyes with the colorimetric evaluation of their dyeings

The wavelengths, molar extinction coefficients and band widths of the main absorption bands in the visible spectra of solutions of nine blue disperse dyes are compared with colorimetric data of reflectance spectra of their dyeings on polyester. The colorimetric data are evaluated on the basis of the CIE chromaticity diagram and the psychometric CIELAB method. All but one dye were commercial dyes and the structures of dyes which were not known from the literature were elucidated by elemental analysis, MS, and ¹H- and ¹³C-NMR spectroscopy.     

Synthesis and characterization of solubility enhanced metal-free phthalocyanines for liquid crystal display black matrix of low dielectric constant

For the liquid crystal display (LCD) black matrix (BM) with a low dielectric constant and high light absorption property, it is advantageous to employ dyes instead of carbon black or pigments. For this purpose, the dyes should have high solubility in industrial organic solvents. For improved solubility in industrial solvents, three metal-free phthalocyanines (PC), peripherally substituted with bulky groups, were synthesized and dye-based BMs were fabricated. The solubility as well as the spectral and thermal properties of the dyes were examined, and the optical, thermal and dielectric properties of a dye-based black matrix were tested. The greenish phthalocyanine dyes with high molar extinction coefficients and high thermal stability showed enhanced solubility in industrial solvents as a result of the greater steric hindrance among the dye molecules and higher affinity between the dye molecules and solvents. The dye-based BMs had low dielectric constants and exhibited superior optical properties and satisfactory thermal stability.     

五元杂环取代BODIPY染料的合成及光谱性能研究

以吡咯和2-呋喃甲醛、2-噻吩甲醛为原料,经缩合、氧化、环化反应合成了含新型五元杂环的BODIPY荧光染料,进一步溴化分别得到两种一溴代染料,所有合成的染料分子均通过质谱、核磁等手段进行了结构表征,并测试了这些染料的吸收光谱和发射光谱.结果表明:所有染料随着溶剂极性的增大表现出一定的溶剂化效应,吸收和发射波长变化不大(...     

The synthesis and spectroscopic investigation of dichromophoric hemicyanine dyes

Alkane α,γ-bis[4-methylpyridinium] diiodide and alkane α,γ-bis[4-methylquinolinium] diiodide were prepared and used as starting materials in the synthesis of dichromophoric cyanine dyes. Structural confirmation of the synthesized dyes was carried out by ¹H NMR, MS spectroscopy and elemental analysis. The electronic absorption and the emission spectra for all the hemicyanines were measured in four organic solvents of varying polarity. All derivatives absorb in the region of about 500 nm and have molar absorptivity of about 10⁴ M⁻¹ cm⁻¹. The absorption spectra of tested compounds are affected by their structure i.e. the structure of dialkyl(aryl)amino group, the electron acceptor part of the dye and the linker between two identical hemicyanine chromophores. The fluorescence bands' positions, in contrast to the absorption, are strongly affected by the solvent polarity.