首页期刊导航|Dyes and Pigments
期刊信息/Journal information
Dyes and Pigments
Elsevier Applied Science Publishers Ltd.
Dyes and Pigments

Elsevier Applied Science Publishers Ltd.

0143-7208

Dyes and Pigments/Journal Dyes and PigmentsSCICCRISTPEIAHCI
正式出版
收录年代

    Fabrication of semiconducting polymer-blend dots with strong near-infrared fluorescence and afterglow luminescence for bioimaging

    Lu, FengLi, LiliZhao, TingDing, Bingqiang...
    8页
    查看更多>>摘要：Fluorescence imaging at longer wavelength and autofluorescence-free imaging were two main strategies to improve the optical imaging performance of traditional near-infrared (NIR) fluorescence imaging, and the design of corresponding imaging agents were heavily explored recently. Herein, polymer-blend dots (PBdots) with strong fluorescence and afterglow luminescence in both NIR-I (700-900 nm) and NIR-II (900-1700 nm) windows were successfully fabricated by encapsulating two functional semiconducting polymers into one nanoparticle. With efficient intra-particle interactions, the PBdots exhibited an afterglow lifetime of 181 s after 730 nm NIR laser activation, which can be activated in vivo. The obtained PBdots with similar emission intensities in NIR-I and NIR-II regions enable fair comparison between different optical imaging modalities, which provides a clear guidance for the choice of suitable imaging modality for different purpose. As the first imaging agents which integrate NIR-II fluorescence imaging and NIR-I afterglow imaging, the PBdots also provide both high resolution and large signal-to-background ratio for blood vessel, lymph node and tumor imaging in living mice.
      原文链接:
    • NSTL
    • Elsevier

    Different metal-ligand ratios regulated two Cd(II)-containing viologen-derived photochromic coordination polymers

    Li, Zhao-HaoXue, Li-PingLi, ShuoZang, Ping-Fang...
    7页
    查看更多>>摘要：Through meticulous tuning of the metal-ligand ratios, two new coordination polymers (CPs) based on N-(3-carboxypyridin-5-yl)-4,4'-bipyridinium (cpbpy) and 2,5-thiophenedicarboxylic acid (H2L) mixed ligands, namely, {[Cd(cpbpy)(L)(H2O)(2)](H2O)(3)}(n) (1) and {[Cd-2(cpbpy)(L)(2)(H2O)(4)](H2O)(4)}(n) (2) have been successfully synthesized. The single-crystal X-ray diffraction analysis reveal compounds 1 and 2 both crystallize in triclinic P- 1 space group, while compound 1 is a 1D chain structure and compound 2 displays a 2D layered structure with 3 connected 6(3)-hcb topology. 1 and 2 exhibit photochromism and undergo distinct color changes from light yellow to green due to the formation of radicals. This work provides a simple method via regulation of metal-ligand ratios to synthesize new photochromic CPs.
      原文链接:
    • NSTL
    • Elsevier

    The mark of Mercury(II) in living animals and plants through using a BODIPY-based near-infrared fluorescent probe

    Chen, WeijieGuan, YihanChen, QiongRen, Jun...
    9页
    查看更多>>摘要：Heavy metal pollution, especially mercury(II) contamination has caused severe hazards to human health and environmental security in recent years. Therefore, studies on the detection and control procedures towards residual mercury(II) with tools are significant. In view of the actual demand in vivo detection, we employed a dipyrromethene boron difluoride (BODIPY) core as the near-infrared (NIR) fluorophore and an aza-containing macrocyclic thioether as the recognition ligand to develop a new NIR fluorescent probe with good photo stability, which could specifically respond mercury(II) ions with a turn-on NIR emission. This tracking agent had an excellent capability of quantitatively analysis and could be applied in the measurement of mercury(II) concentration in shrimp samples. Especially, the NIR emission around at 790 nm endowed it possessing an advantage in vivo imaging, and could be used to mark the level of mercury(II) pollution with insignificant interferences in living biological systems such as cells, zebrafish and mice. It was worth mentioning that the emission of this probe completely avoided the background fluorescence of chlorophyll in Arabidopsis thaliana to present the degree of mercury(II).
      原文链接:
    • NSTL
    • Elsevier

    Variable infrared emittance mechanisms of electrochromic film based on poly(aniline) under various doping concentrations of camphorsulfonic acid

    Lu, FeifeiTan, PeiyuRen, DengfengHan, Yuge...
    8页
    查看更多>>摘要：Poly (aniline) (PANI) is considered an ideal material for the modulation of infrared (IR) radiation due to its excellent electrochromic properties. However, the camphorsulfonic acid doping mechanism which results in emittance modulation is not clearly understood. With the goal of enhancing the IR emittance variation (As), a PANI film was synthesized by a chemical oxidation and spraying method, and the doping mechanism of CSA concentration effect on As was studied by combining Raman spectra, X-ray photoelectron spectra and density functional theory calculations. The results demonstrate that with increasing camphorsulfonic acid concentration, the effect of the doping concentration on the emittance of PANI/Au films can be divided into two stages: (1) the change in the emittance is mainly caused by the shortening of optical penetration depth either under the state of dopant free (non-doped) or a low CSA doping concentration; (2) the change in emittance is mainly caused by the increase in reflectivity of the PANI layer under the increased doping. Due to the joint action of the two factors, the emittance of the PANI film first increases and then decreases with increasing concentration of CSA, and the maximum As (0.45) is realized at 1 M. This paper clarifies the mechanism of PANI films with different CSA dopant concentrations and could provide a way to increase the emittance modulation range by adjusting the concentration of the dopants.
      原文链接:
    • NSTL
    • Elsevier

    Sensitive and selective sensor based on porphyrin porous organic cage fluorescence towards copper ion

    Ren, HuiminLiu, ChaoYang, WeiJiang, Jianzhuang...
    6页
    查看更多>>摘要：In present work, a fluorescent porphyrin organic cage sensor PTC-1(2H) for sensitively and selectively detecting divalent copper ion has been introduced. PTC-1(2H) contains the three metal-free units connected by chiral cyclohexanediamine, exhibiting a red-light emission with a broad band at the maximum 641 nm. Among the addition of various metal ions, the emission of PTC-1(2H) has been exclusively and seriously quenched by the addition of divalent copper ions, exhibiting a low limit of detection value of 6.3 nM. A crystal structure of cage with copper ion confirms the complexation of porphyrin N4 cavity and metal ions, revealing the optimized bind position. The special cage structure exhibits the better sensing property than monomeric compound. In addition, a photothermal conversion performance of PTC-1(Cu) has been discovered. These results further enrich the chemistry of porous organic cages.
      原文链接:
    • NSTL
    • Elsevier

    Solvent-free stretchable photo-responsive supramolecular actuator topologically cross-linked by azobenzene-cyclodextrin based slide-ring system

    Ma, WenjingFang, HuiTian, DandanZheng, Lingji...
    7页
    查看更多>>摘要：The highly reversible photo-isomerization speed and efficiency of azobenzene make photomechanical polymers come true. While how to amplify the impact of molecular photo-isomerization upon the polymers to realize macro-motions remains a long way. Here we prepared a multi-stimuli-responsive supramolecular actuator via introducing slide-ring cross-linkers of azobenzene-cyclodextrin into polyacrylamide network. The result gel showed extremely quick response to various stimuli especially light even without solvent. Attributing to the slide-ring crosslinkers in the structure, the bending angle of CD-Azo gel reached to 40.0within 0.5 s toward 365 nm light resource. In addition, overcoming the mechanical weakness of stimuli-sensitive hydrogel, the solvent free polymer film exhibited high tensile strength of 15.00 MPa, elongation at breaking limit of 150% and Young's modulus of 0.34 MPa.
      原文链接:
    • NSTL
    • Elsevier

    Highly visible bis-heterocyclic acridinium and xanthenium-based dyes: Synthesis, AIEE, and modacrylic dyeing

    Baig, Moghal Zubair KhalidOh, HyeonSon, Young-A
    20页
    查看更多>>摘要：A series of highly visible new bis-heterocyclic acridinium and xanthenium-based dyes were synthesized and were characterized with H-1, C-13 NMR, and HRMS spectra. These dyes showed excellent molar attenuation coefficient and fluorescence quantum yield. All the acridinium and xanthenium-based compounds were aggregation induced enhanced emission (AIEE) active fluorophores. The restriction in rotation of the free rotary aryl group at the 9th position of acridinium and xanthenium-based compounds was one of the reasons for the AIEE activity. This phenomenon was supported by viscochromic studies. The compounds showed excellent fluorescence in varied pH that expands the scope of its usage in biological imaging. With commendable color brightness, molar absorptivity, reflectance, and emission, they were used in high visible modacrylic fabric dyeing for protective wear. The dyed fabrics were investigated for color coordinates and color strengths. The dyeing studies were compared with acridine orange and rhodamine B commercial standards. The lightfastness of compounds 3e and 4e were investigated with respect to commercial acridine orange and rhodamine B.
      原文链接:
    • NSTL
    • Elsevier

    Development of low-cost colourimetric and pH sensors based on PMMA@Cyanine polymers

    Galhano, JoanaMarcelo, Goncalo A.Kurutos, AtanasBertolo, Emilia...
    12页
    查看更多>>摘要：Cyanine derivatives 1-3 were successfully characterized and their sensorial ability studied against Zn2+, Co2+, Cd2+, Ni2+, Cu2+, Hg2+ and Ag+ metal ions. All dyes revealed a colourimetric selectivity towards Cu2+ metal ions, with the formation of mononuclear species. Cyanine 2 can detect and quantify the lowest concentrations of Cu2+ in aqueous media, 0.3 and 0.6 mu M. With the aim of exploring the optical properties of these dyes, solid-supported devices were designed by the synthesis of polymethylmethacrylate (PMMA) polymers doped with dyes 1, 2, and 3 and their copper complexes. All PMMA_doped polymers were tested as temperature and low-pH sensors. PMMA_1 and PMMA_1@Cu2+ showed to be reversible fluorimetric thermoresponsive polymers, while PMMA_2, PMMA_3, PMMA_2@Cu2+ and PMMA_3@Cu2+ irreversible colourimetric and fluorimetric thermor-esponsive polymers. From all acids tested, HCl, HBr, HClO4, H3PO4, HCOOH and CH3SO3H, the best results were obtained for PMMA_3 and PMMA_3@Cu2+ with HCl. After activation in 12 M HCl, both polymers were capable of sensing 8 M, 10 M, 11 M and 12 M HCl: their color changed from green to yellow and they showed an increase in their emission maxima at 805 nm in seconds. The capability to reversibly sense higher acid concentrations in seconds, after activation, for more than 10 cycles, make PMMA_3 and PMMA_3@Cu2+ good candidates for superacid sensing, allowing for a real-time follow up of contaminated affluents, or their incorporation in quality control in industrial processes.
      原文链接:
    • NSTL
    • Elsevier

    UV-harvesting dyes featuring a fluorene donor for visibly transparent and colorless dye-sensitized solar cells

    Marysya, Mutia AnissaHayati, DiniHan, SooyoungLong, Dang Xuan...
    9页
    查看更多>>摘要：We report the facile synthesis of UV-harvesting dyes featuring a fluorene donor with different pi-conjugation bridges. Moreover, we determine the spectroscopic, electrochemical and colorific properties of the dyes and verify their applicability as photosensitizers in visibly transparent and colorless dye-sensitized solar cells. The UV-selective and visibly transparent solar cells exhibit a power conversion efficiency of 0.91%-2.70% under one sun illumination (100 mW/m(2)) and 6.17%-8.13% under UVA (365 nm, 115.22 mW/m(2)), with the corresponding visible light transmittance of 60.73%-58.22% and general color rendering index of 91-90.
      原文链接:
    • NSTL
    • Elsevier

    Two-photon fluorogenic probe off gamma-glutamyl transpeptidase for cancer cells identification with simultaneous oxidative stress monitoring

    Du, WeiShao, TaoWang, LanQin, Wenjing...
    8页
    查看更多>>摘要：gamma-Glutamyltranspeptidase (GGT) is overexpressed as a special biomarker in several important cancers. Until now, the reported GGT-targeted fluorescent probes have encountered key challenges, such as low selectivity and leakage after hydrolysis. Herein, a novel two-photon fluorogenic probe (Glu-TPAN) was designed for the specific detection of GGT in cells and in vivo. This probe was combined with the GGT-responsive group gamma-glutamate and two-photon dye TPAN, which showed significant fluorescence enhancement upon the introduction of GGT. Noteworthy, Glu-TPAN could distinguish hepatoma cells from healthy hepatic cells and detect the oxidative stress in cells through monitoring GGT levels. Furthermore, endogenous and exogenous GGT level and oxidative stress detections were realized with Glu-TPAN in vivo. This novel GGT fluorogenic probe is of great significance for the development of precancerous detection.
      原文链接:
    • NSTL
    • Elsevier