RSC Advances
·
2015
·Vol. 5
·期 39
·30631-30639
·
IF 3.84
Haiyan Mao,Fan Yang,Chaoxia Wang,Youjiang Wang,Donggang Yao,Yunjie Yin
Dye-bonded blocked waterborne polyurethanes were developed to synchronously realize coloring and finishing of textiles and improve colorfastness using an anthraquinone chromophore and a methyl ethyl ketoxime blocking agent. The number-average molecular weight of the dye-bonded blocked polyurethane is 2303 g mol−1 and the polydispersity is 1.06, indicating a narrow molecular weight distribution. The maximum absorption wavelengths do not shift after the monomolecular chromophores are bonded to the polyurethane. The self-colored polyurethanes provide better centrifugal stability and water solubility than the dye-mixed blocked polyurethanes. The dye-bonded blocked polyurethane offers good thermal stability below 100 °C and undertakes de-blocking at about 150 °C. The covalent bonding of the anthraquinone moiety with the polyurethane chain and temporary blocking of the terminal isocyanate groups are conducive to enhancing the tinting strength and colorfastness of the treated cotton fabrics. The self-colored blocked polyurethanes with good elasticity and toughness can improve the recovery angle of the treated cotton up to 120°, which can also endow the fabric with wrinkle resistance.
研究领域:
材料科学
·
纺织化学
·
染料化学
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DOI
高影响因子
ChemistrySelect
·
2022
·Vol. 7
·期 48
·e202203886
·
IF 2.307
Dongshuang Jia,Yuhe Shen,Xuelin Zhang,Yuefei Wang,Rongxin Su,Wei Qi
Graphical The doped GA and TA produce a more complex structure of MPN through the synergistic effect of chelating with metal ions to finally obtain more colorful MPN pigments. MPN pigments can be deposited on the hair surface through covalent and non-covalent interactions, producing a range of highly saturated and stable coloring effects. In this study, we developed a complex polyphenol-metal ion system, in which two polyphenols represented by gallic acid (GA) and tannic acid (TA) chelated with metal ions leading to the formation of pigments composed of metal-phenol networks (MPN). The doping of GA and TA creates a mutual synergistic effect, which makes it chelate with metal ions to produce a more complex structure of MPN, and finally obtain more colorful MPN pigments. The MPN pigments can be easily deposited on the hair surface through covalent and non-covalent interactions, resulting in a series of hair dyeing effects with high color saturation and excellent stability. With many advantages such as low raw material cost, short hair dyeing time, simple process, good biocompatibility, less fading, and antioxidant, this composite polyphenol-metal ion material offers the possibility to replace the classical irritant hair dyes commonly used in existing cosmetics.
研究领域:
材料科学
·
生物学
·
化妆品科学
✓ 已验证
DOI
高影响因子
TETRAHEDRON
·
2021
·
IF 2.457
Xuwei Zheng,Jianan Dai,Baoxing Shen,Xing Zhang
An aggregation induced emission (AIE) fluorescent protein chromophore derivative CIC-FP for detecting protamine and heparin under physiological environment was designed and synthesized. CIC-FP exhibited good biocompatibility and a large stoke shift (91 nm), thus well attenuating the background interference, which could be used for quantitative detection of heparin and protamine . Since protamine has strong positively groups, it can interact with CIC-FP where bearing carboxyl through electrostatic interactions to form a tightly bound CIC-FP/protamine complex, thus showing superior fluorescence intensity response with a detection limit of 65.28 ng/mL. Because heparin has a stronger affinity with protamine, it would compete with CIC-FP on protamine, resulting in the release of CIC-FP and making CIC-FP change into free state with decreased fluorescence intensity . Besides, CIC-FP was successfully applied to detect spiked protamine in human serum samples. In summary, CIC-FP can be used to sensitive detection of protamine with good accuracy, which provides a new idea for designing protamine probes.
研究领域:
生物化学
·
医学检测
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产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2024
·
IF 4.2
Yongming Zeng,Tianchi Xu,Weizhi Chen,Jianglin Fang,Dongzhong Chen
Organic and polymer fluorescent nanomaterials have been a frontier research focus. Here in this work, a series of fluorinated zwitterionic random copolymers end-attached with a quasi-chromophoric group of pyrene or tetraphenylethylene (TPE) have been well synthesized via atom transfer radical polymerization with activators regenerated by electron transfer (ARGET ATRP). Those random copolymers with total degree of polymerization 100 or 200 are able to produce fluorescent single-chain nanoparticles (SCNPs) through intra-chain self-folding assembly with quite uniform diameters in the range of 10∼20 nm as characterized by dynamic light scattering and transmission electron microscopy. By virtue of the segregation or confinement effect, both SCNPs functionalized with pyrene or TPE group are capable of emitting fluorescence, with pyrene tethered SCNPs exhibiting stronger fluorescence emission reaching the highest quantum yield around 20%. Moreover, such kind of fluorescent SCNPs manifest low cytotoxicity and good cell imaging performance for Hela cells. The creation of fluorescent SCNPs through covalently attached one quasi-chromophore to the end of one fluorinated zwitterionic random copolymer provides an alternative strategy for preparing polymeric luminescence nanomaterials, promisingly serving as a new type of fluorescent nanoprobes for biological imaging applications. This article is protected by copyright. All rights reserved
研究领域:
材料科学
·
生物医学工程
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2017
·Vol. 218
·期 24
·1700410
·
IF 2.5
Jing Xu,Dan Luo,Xianze Yin,Hongwei Zhang,Luoxin Wang,Hua Wang
In this contribution, a new class of fluorescent polynorbornenes containing side chains that homogeneously decorated with aminosuccinimide side groups as nonconventional chromophores is introduced. First of all, monomers M1 – M3 are synthesized in an efficient and straightforward fashion by means of Michael addition between three kinds of alkyl amines and monomer precursor 1 , a compound containing norbornene (polymerizable group) and maleimide (Michael acceptor) groups. Subsequently, ring-opening metathesis polymerization of M1 – M3 is conducted to generate polymers P1 – P3 with high molecular weights ( M n values exceeding 9800) and narrow molecular weight distributions ( Ð values no more than 1.20), respectively. Quantitative conversion of monomers and microstructural integrity of polymers are verified in all cases. Finally, thermal stability, glass transition behavior, wettability, and optical properties of polymers P1 – P3 are investigated. In particular, this new class of fluorescent polymeric materials exhibits blue emission (470–478 nm) under UV irradiation with large Stokes shifts (over 110 nm).
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
X. Zhou,M.-H. Zhao,J. Yang,Y. Han,L. Cao,Y.-Y. Han,J. Wang,Y. Wang,M.-R. Li
Environment-friendly and cost-effective versatile yellow-green inorganic pigments are technically significant for natural camouflage but rare. Here, we adopt site-selective parent-doping of Mn–Li into the octahedral Ca-site (Ca B ) of Ca 3 TeO 6 to deliver vivid greenish pigments by the unprecedented yellow-green Mn 4+ O 6 chromophore, yielding tunable pigments resemble to seasonal leaves. The camouflage color zone of these pigments are remarkably enlarged by chemical pressure via Mg 2+ /Sr 2+ -substitution for the A -site Ca (Ca A ). The locally anisotropic and positive chemical pressure on chromophore group is scaled to be around +14.4/+23.3 GPa, as estimated from the accompanied geometric evolution of Mn 4+ O 6 . The achieved pigments also demonstrate excellent chemical and thermodynamic stability and high (60–80%) near infrared reflectivity in 1500–2500 nm, showing potential applications for natural camouflage and yellow-green “cool pigments”. These findings built a bridge between chemical and equivalently physical pressure, and nominated a way to estimate the overall and local strain/pressure by optical descriptor.
研究领域:
无机化学
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材料科学
·
光学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Applied Spectroscopy
·
2025
·
IF 1
Bahdanava A. V.,Zhang J.,Bel’ko N. V.,Parkhats M. V.,Chizhevsky V. N.,Kulahava T. A.,Mogilevtsev D. S.,Zhang X.
An investigation was carried out on the fluorescent properties of nanoparticles made by a hydrothermal method from an ethanolic extract of mulberry leaves. Our analysis confirmed the presence of carbon dot nanostructures exhibiting fluorescence emission peaking at 670 nm (excited at 405 nm) with a quantum yield of 45%. Photobleaching of the nanoparticles upon quasi-continuous excitation at 405 nm was observed with 10–20 s irradiation. Without illumination, partial fluorescence recovery was detected consisting of several percent within one minute and over 25% after 16 h in darkness. Comparative spectral analysis of the initial leaf extract and the synthesized red-luminescent carbon dot fraction revealed similarities, suggesting the presence of unbound organic molecules with chromophore groups in the medium. The chromophores were found to accumulate in erythrocyte membranes, enabling cell visualization. However, these chromophores were found to be both cytotoxic and phototoxic. Thus, the synthesis of carbon dots from multicomponent plant extracts may result in incomplete carbonization and degradation of the chromophores, which can significantly alter our interpretation of the optical properties of these nanostructures.
研究领域:
纳米技术
·
材料科学
·
光物理学
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植物生物化学
·
生物医学成像
✓ 已验证
DOI
高影响因子
FOOD CONTROL
·
2019
·
IF 4.248
Zhongxu Zhan,Hui Li,Ju Liu,Guoyang Xie,Fangbing Xiao,Xin Wu,Zoraida P. Aguilar,Hengyi Xu
Listeria monocytogenes ( L. monocytogenes ) is a foodborne pathogen which can cause significant threats to human health, thus, a highly specific and accurate method for detection in food is urgently needed. In this study, an enzyme-linked aptasensor with rolling circle amplification (ELARCA) assay was developed for the sensitive and specific detection of L. monocytogenes. The assay was based on the competition between the aptamer (that was specific for L. monocytogenes ) that was bound to the biotin probe 1 (BP1~A) and the RCA probe that was complementary to the BP1. Addition of the bacteria released the BP1 making it available for the RCA probe which initiated the RCA process. In the presence of the RCA buffer, multiple copies of the DNA were formed which attached the biotin probe 3 (BP3). The biotin in BP3 interacted with streptavidin labeled with horse radish peroxidase (SA-HRP) to complete the assay complex. In the presence of the enzyme substrate, HRP produced a chromophore that led to the colorimetric detection. Under the optimal conditions, the ELARCA assay for L. monocytogenes showed a limit of detection (LOD) of 4.6 × 10 2 CFU/mL in pure culture, which was three orders of magnitude higher than without RCA. The ELARCA assay in spiked fresh lettuce showed an LOD of 6.1 × 10 3 CFU/g. The method developed was fast, low-cost, sensitive, and highly specific for L. monocytogenes . By changing the specificity of the aptamer, the proposed ELARCA method provided a potential platform for the detection of other pathogenic bacteria.
研究领域:
微生物学
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食品安全
·
生物技术
·
分析化学
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产品关联
DOI
高影响因子
BIOMATERIALS
·
2014
·
IF 8.312
Zhaowei Chen,Zhen Liu,Zhenhua Li,Enguo Ju,Nan Gao,Li Zhou,Jinsong Ren,Xiaogang Qu
Over-generation of reactive oxygen species (ROS) is closely associated with the biological processes of rheumatoid arthritis (RA). Thus, efficient monitoring ROS in inflammatory joints would be essential for better understanding the pathogenesis and optimizing therapeutic interventions. Herein, we designed a ratiometric nanoprobe utilizing upconversion nanoparticles (UCNPs) conjugated with chromophore labeled hyaluronic acid (HA) for high sensitively sensing ROS in the aqueous solution, bioimaging ROS in inflammatory mimic cells and diagnosing RA in vivo. In this approach, the conjugation of HA conferred UCNPs not only water solubility but also biocompatibility and ROS recognizing properties. Particularly, the HA backbone cleavage and detachment of chromophore labeled HA fragments from UCNPs induced by ROS inhibited the luminescent energy transfer (LRET) and allowed rational metric upconversion luminescence (UCL) emission as the detection signal. Importantly, the upconversion nanoprobe showed high effectiveness for early assessing the treatment response of arthritic animals to an antiarthritic drug-methotrexate (MTX).
研究领域:
纳米技术
·
生物医学工程
·
分析化学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 3.978
Yaru Zhang,Jing Ren,Quan Wang,Shuxiang Wang,Shuna Li,Hongya Li
In the current work, studies were conducted for understanding oxidation characteristics and biodegradation potential of a dye-decolorizing peroxidases from Bacillus amyloliquefaciens (BaDyP) for triphenylmethane dye crystal violet (CV). Recombinant BaDyP from Bacillus amyloliquefaciens MN-13 exhibits a broad substrates profile. It can oxidize ABTS, veratryl alcohol, Mn 2+ , azo dye reactive black 5, anthraquinone dye reactive blue 19, but cannot oxidize guaiacol. The maximum BaDyP activity against ABTS was obtained at 30 ℃ and pH 4.0. When CV was treated by BaDyP for 72 h, the degradation percentage of 63.0 % was observed. UV–vis spectra and HPLC/MS analysis indicated that CV degradation occurred via N -demethylation and cleavage of conjugated chromophore structure. The identified degradation products included stepwise N -demethylated intermediates during the N -demethylation of CV and, 4-( N -methylamino)-4′-( N ’-methylamino) benzophenone and 4-( N -methylamino)-4′-amino benzophenone after cleavage of conjugated chromophore structure. Based on these data, a hypothetic mechanism of CV degradation mediated by BaDyP was proposed in this study. Finally, it is worth to be noted that BaDyP possessed high decolorization efficiency (72.3 % removal ADMI) for actual dye effluent. These results demonstrated that BaDyP might be used as an efficient biocatalyst for the enzymatic pretreatment of dyes in wastewater.
研究领域:
环境科学
·
生物技术
·
酶学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Falin He,Huijian Shi,Shaoyang Hu,Rutao Liu
Currently, the binding of iron-binding protein transferrin (TF) with NPs and their interaction mechanisms have not been completely elucidated yet. Here, we probed the conformation-dependent release of Fe ions from TF induced by nano-sized polystyrene plastics (PS-NPs) using dialysis, ICP-MS, multi-spectroscopic techniques, and computational simulation. The results showed that the release of free Fe ions from TF was activated after PS-NPs binding, which displayed a clear dose-effect correlation. PS-NPs binding can induce the unfolding and loosening of polypeptide chain and backbone of TF. Alongside this we found that the TF secondary structure was destroyed, thereby causing TF protein misfolding and denaturation. In parallel, PS-NPs interacted with the chromophores , resulting in the occurrence of fluorescence sensitization effects and the disruption of the surrounding micro-environment of aromatic amino acids . Also, the binding of PS-NPs induced the formation of new aggregates in the PS-NPs-TF system. Further simulations indicated that PS-NPs exhibited a preference for binding to the hinge region that connects the C-lobe and N-lobe, which is responsible for the Fe ions release and structural alterations of TF. This finding provides a new understanding about the regulation of the release of Fe ions of iron-loaded TF through NPs-induced conformational and structural changes.
研究领域:
生物化学
·
分子生物学
·
纳米技术
·
蛋白质化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）