蓄光材料及其在塑料中的应用

论述了蓄光材料的基本类型及蓄光材料与塑料的配合，介绍了蓄光塑料的特性，对蓄光塑料的制造、蓄光塑料的应用作了简要的说明。     

荧光颜料型发光涂料

利用3因素4水平正交试验和一系列对比试验，得到了荧光颜料型发光涂料最佳配比组成：丙烯酸树脂40％～45％、碳酸钙30％～35％、有机发光颜料20％～25％、甲苯、消泡剂和增塑剂等适量：所得涂层具有良好的物理机械和发光性能。此外，在基材表面预涂适当底漆，将有助于提高面涂层的发光性能。     

Synthesis and spectral investigation of alkyl methacrylates with halogenated carbazolyl pendant groups for photonics applications

The alkyl methacrylates with halogenated carbazolyl pendant groups were prepared, and the analysis of their absorption and emission spectra showed that the polymers containing monohalogenatged carbazole rings were capable of exhibiting a high singlet‐triplet (S‐T) conversion. The reasons that mainly triplet excitons could be observed in such polymers and additional bands appearance in the spectra of the polymers with dihalogenated carbazole rings are discussed. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 1650–1656, 2002; DOI 10.1002/app.10469     

罗丹明B的三维荧光光谱研究

本文利用三维荧光激发-发射光谱研究了罗丹明B的荧光光谱特性。考察了罗丹明B浓度、pH值大小等因素对罗丹明B的荧光光谱影响,给出了其三维荧光光谱图。结果显示,罗丹明B的三维荧光光谱图较二维荧光光谱图能更详细地描述被测组分的性质,为综合考查罗丹明B的结构特征提供了参考。     

Recent Advances in Luminescent Transition Metal Polyyne Polymers

This review briefly summarizes research work carried out by the author in the past decade on rigid-rod transition metal polyyne polymers and their molecular precursors. The research involves the synthesis, spectroscopic and photophysical characterization, ligand functionalization, and possible optoelectronic applications of transition metal polyyne polymers. Herein, oligomeric and polymeric metal alkynyl systems of the late transition metals are discussed, and particular attention is focused on the electronic absorption spectroscopy and photoluminescence behavior, thermal stability and structural aspects of these polymetallaynes. A detailed account of the evolution of the first excited singlet and triplet state on the electronic structure of the organic spacer groups of these metal polyyne polymers is also given and the interplaying factors that govern the spatial extent of the lowest-lying singlet and triplet energy levels for the chemical tailoring of the singlet–triplet gap are elucidated. The possible developments of this research are also envisaged.     

丝网印刷夜光油墨的制备及性能研究

以树脂类混合连接料,配合紫外线吸收剂、光稳定剂等制备夜光油墨,并通过制版、采用丝网印刷,在塑料薄膜上完成图文的转移。通过测试不同印品的附着力、激发光谱、发射光谱确定出各自不同的粘附程度及发光强度,最终确定较优的制备工艺。     

国外化妆品用钛系颜料的开发进展

介绍了国外化妆品用的钛系颜料 :遮盖型二氧化钛、透明型二氧化钛、云母钛珠光颜料、光致变色型含钛颜料、低价氧化钛黑 (钛黑 )、包核型含钛颜料、含钛的金属氧化物混相颜料等的开发进展。     

硅酸盐体系长余辉发光材料的合成研究

硅酸盐是一种性能稳定的基质材料.本文综述了硅酸盐体系长余辉的发展历史,制备方法和发光机理等方面的最新进展.指出了目前该类材料研究中存在的问题,并提出从基质材料、制备技术和稀土离子发光机制入手是长余辉发光材料今后研究与开发的发展方向.     

有机颜料在塑料着色中几个指标初探

本文提出了有机颜料在塑料着色中的几个主要指标，分别探讨了这些指标的表征和测试方法，在试验的基础上，对比了国产塑料（杭州百合化工有限公司）与进口颜料的性能与水平。     

聚合物发光材料发光波长及效率的组成和结构调控

介绍了聚合物电致发光材料的种类、结构及性能特点,阐述了聚合物电致发光材料的结构与其发光波长的关系,讨论了聚合物光电材料发光波长和效率的组成和结构调控。     

Fingerprinting Biogenic Aldehydes through Pattern Recognition Analyses of Excitation–Emission Matrices

Biogenic carbonyls, especially aldehydes, have previously demonstrated their potential to serve as early diagnostic biomarkers for disease and injury that have not been fully realized owing, in part, to the lack of a rapid and simple point-of-care method for aldehyde identification. The ability to determine which carbonyl compound is elevated and not just the total aldehydic load may provide more disease- or injury-specific diagnostic information. Toward this end, a novel fluorophore is presented that is able to form a complex with biogenic carbonyls under catalyst-free conditions so as to give a fluorescent fingerprint of the resulting hydrazone. The successful identification of bound carbonyls was accomplished with a newly described algorithm that applied principal curvature analysis of excitation–emission matrices to reduce surface features to ellipse representations, followed by a pattern-matching routine. With this algorithm, carbonyls were identified over a range of concentrations, and mixture components were successfully parsed. Overall, the results presented lay the groundwork for novel implementations of chemometrics to low-cost, rapid, and simple-to-implement point-of-care diagnostics.     

Ion-exchange pigments in primer paints for anticorrosive protection of steel in atmospheric service: Cation-exchange pigments

Hexavalent chromium compounds (chromates) have been widely used as inhibitor pigments in the formulation of anticorrosive primers. However, their high toxicity and carcinogenic effects are forcing the development of effective chromate-free organic coatings. One such alternative is the use of ion-exchangeable pigments. Studies of these pigments have not been conclusive about their anticorrosive efficiency and controversy surrounds their functional mechanisms, exchange capacity and anticorrosive performance.     

Prediction of emission spectra of fluorescence materials using principal component analysis

Fluorescent materials are now a critical field of research due to their unique excitation and emission properties that can be tailored to specific fluorescence detection technologies. In this work, a procedure is described to approximate the emission spectral data of fluorescent materials of different types from their excitation spectral data using principal component analysis (PCA) technique. First, PCA as a statistical and mathematical method was used to reconstruct the excitation and emission spectra of training dataset and then, the approximation was accomplished by multiple linear regression (MLR).The performance of obtained function was examined on testing dataset. Afterward, CIE tristimulus values of the fluorescent samples were calculated based on ASTM, E2152–12 standard test method. The colorimetric accuracy was then evaluated by calculating the geometric differences in CIE tristimulus values X, Y, and Z for the 1964 standard colorimetric observer under illuminant D65. The obtained results show a good curve fit between the actual emission spectra and recovered emission spectra. In addition, based on cumulative variance and root mean square (RMS), eight principal components were selected as optimum number of principal components for prediction of emission spectra data. © 2015 Wiley Periodicals, Inc. Col Res Appl, 41, 16–21, 2016     

Corrosion inhibition of copper and brass pigments in aqueous alkaline media by copolymers

Copper and brass pigments corrode in aqueous alkaline media with absorption of oxygen which can be measured gasvolumetrically. These corrosion reactions can be inhibited by certain copolymers, the metallic sparkle and the colour of the pigments being preserved. The brass pigment (rich gold) is inhibited more effectively by copolymers than the copper pigment. The corrosion inhibiting effect of styrene–maleic acid–acrylic ester copolymers on copper pigment decreases with increasing the chain length of the ester alcohol of the acrylate monomer. The most effective copolymer examined in this study is the styrene–maleic acid–ethyl acrylate copolymer which inhibited the corrosion reactions of copper and brass pigment both at pH 8.5 and 10.     

White light emitting thermally stable bismuth phosphate phosphor Ca3Bi(PO4)3:Dy3+ for solid-state lighting applications

White light emitting dysprosium-doped Ca₃Bi(PO₄)₃ phosphor was successfully synthesized via co-precipitation method for the first time and the structural, vibrational, morphological, and luminescent properties have been investigated for solid-state lighting applications. X-ray diffraction (XRD) and structural refinement studies reveal that the synthesized phosphors consist of single phase with cubic structure. The field emission scanning electron microscopy (FE-SEM) images reveal that the as-synthesized phosphor has micron size particle with an irregular shape. Under near-ultraviolet (n-UV) and blue excitation, the phosphor exhibits white light emission via a combination of blue (~484 nm) and yellow (~575 nm) emission bands. The optimized concentration of Dy³⁺ ions is 6.0 mol % after which the concentration quenching takes place. The process of energy transfer between Dy³⁺ ions is due to dipole-dipole interaction, which was confirmed by applying Dexter's theory. The CIE chromaticity coordinates for the optimized phosphor were (0.329, 0.377), and they lie in the white light region. The emission intensity remains to be 83.41% at 373 K to that of at room temperature, which indicates good thermal stability. The above mentioned results demonstrate that Ca₃Bi(PO₄)₃ is a potential phosphor for solid-state lighting applications.     

发光纤维的研究进展

介绍了蓄光纤维和荧光纤维(荧光防伪纤维和光致变色纤维)等发光纤维的发光机理、种类、制造方法及各自的用途,以及各种发光纤维的研究进展情况,并对发光纤维的未来发展方向作了展望。今后应开发新型发光材料来降低发光纤维的原料成本     

A highly intense double perovskite BaSrYZrO5.5: Eu3+ phosphor for latent fingerprint and security ink applications

A novel double perovskite BaSrYZrO_5.5:Eu³⁺ red-emitting phosphor was synthesized and characterized by XRD, SEM and PL analyses. The structure of the prepared phosphor was confirmed through JCPDS as well as Rietveld refinement analysis. The present phosphor shows an intense red emission at 613 nm when excited by 394 nm. The CIE colour coordinates value of BaSrYZrO_5.5:Eu³⁺ (9 mol%) phosphor is found to be (0.6181, 0.3783) and it has high colour purity of 99.1%. The 613 nm transition integrated intensity of the present phosphor is 4.44 times higher compared to the commercial red phosphor. The thermal stability and Quantum yield of optimized BSYZ:Eu³⁺ (9 mol%) phosphor were also calculated. The BSYZ:Eu³⁺ phosphor results can be employed as an efficient red component in latent fingerprint detection and anti-counterfeiting applications.     

我国化妆品安全问题与政府耦合

目前,我国化妆品市场上的产品良莠不齐,化妆品安全问题受到伤害的事件也在不断增多。通过对我国化妆品安全问题的成因进行分析,并就政府部门该如何提高我国化妆品安全状况进行了探讨。     

Optical temperature sensing and luminescent switching properties in Pr/Er-doped (K0.5Na0.5)NbO3 materials

For optical temperature sensing materials, the emission and excitation bands are extremely critical to measure the temperature by fluorescence intensity ratio (FIR) technique. Singly Ln-doped optical temperature sensing materials exhibit very few emission bands, which greatly constraints their practical applications of FIR technique. Here, the fabricated Pr/Er co-doped (K_0.5Na_0.5)NbO₃ materials exhibited multi-color (red-green) and dual-mode (downshifting/upconversion) luminescence properties. The temperature sensitivity can be effectively tuned by choosing different emission or excitation bands. The optimized optical temperature sensitivity reached up to 0.0094 K⁻¹, much higher than that of most temperature sensing materials. Besides, the samples also showed excellent luminescence modulation properties based on the photochromic reaction. Under sunlight irradiation, the luminescent switching contrast (ΔR_t) of the samples reached more than 60%. These results may provide a guiding role in designing and modulating optical temperature sensing properties for multifunctional materials.     

The stability of gahnite doped with chromium pigments in glazes from the French manufacture of Sèvres

The French manufacture of Sèvres, famous for its production of fine porcelain artifacts, has been synthesizing pink pigments mainly composed of the spinel phase ZnAl_2?xCr_xO₄ with x varying from 0.25 to 0.41 since the middle of the 19th century. This kind of pigment is mixed with an uncolored frit to obtain decorations for porcelain artifacts. However, the pink color of the pigment is altered in a particular uncolored frit and a brownish color appears. The mechanism of this color change was investigated. Observations under a scanning electron microscope revealed the formation of a phase rich in Cr resulting from reactions between the uncolored frit and the pigment during firing. X‐ray diffraction combined with Rietveld refinements and X‐ray absorption near edge structure measurements at the Cr K‐edge showed that the new formed phase belongs to the same spinel phase ZnAl_2?xCr_xO₄ than the pigment, but with a higher Cr content x. We showed that its formation and thus the stability of the pigment is driven by the Al content in the uncolored frit.