ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Zhiquan Li,Xiucheng Zou,Guigang Zhu,Xiaoya Liu,Ren Liu
Developing efficient unimolecular visible light-emitting diode (LED) light photoinitiators (PIs) with photobleaching capability, which are essential for various biomedical applications and photopolymerization of thick materials, remains a great challenge. Herein, we demonstrate the synthesis of a series of novel PIs, containing coumarin moieties as chromophores and oxime ester groups as initiation functionalities and explore their structure–activity relationship. The investigated oxime esters can effectively induce acrylates and thiol-based click photopolymerization under 450 nm visible LED light irradiation. The initiator O-3 exhibited excellent photobleaching capability and enabled photopolymerization of thick materials (∼4.8 mm). The efficient unimolecular photobleachable initiators show great potential in dental materials and 3D printings.
研究领域:
材料科学
·
化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Yufeng Zou,Jianbo Zhang,Yumin Niu,Dengyong Liu
The key constituent(s) of sugar-smoking brown pigments were identified, the chemical and biological properties were subsequently investigated, and the possibility of obtaining it from nature was explored. A pigment was isolated, which was identified as condensation product of 5-hydroxymethyl-2-furfuraldehyde (5-HMF) with glucose: 5-(α-D-glucopyranosyl-(1–6)-α-D-glucopyranosyloxymenthyl)-2-furancarboxaldehyde (5-GGMF). The molecular weight was 450.00. The interaction between pigment with protein on chicken skin was mainly via hydrogen and carbon-hydrogen bonds. It was obtained by caramelization instead of Maillard reaction. Discoloration of sugar-smoking pigments were mainly due to cleavage of chromophores caused by the oxidation reaction followed by photobleaching mechanism. Both radical scavenging and antiproliferative capacity of sugar-smoking pigment were in a dose-dependent manner. However, the IC 50 values for HepG2 and PANC-1 cells differed by more than ten times. Since 5-GGMF is also present in plant resources (like Rehmanniae Radix ), it can be obtained as natural additive to produce clean label sugar-smoked meat products.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Honglin Zhang,Ting Liu,Mingming Xu,Feng Qin,Zhiguo Zhang,Ye Tian
In this study, PtOEP/poly(p-FSt-co-TFEMA) fluoropolymer film based on the dynamic fluorescence quenching mechanism was prepared by embedded platinum octaethylporphyrin (PtOEP) in poly (p-fluorostyrene-co-trifluoroethyl methacrylate) (poly(p-FSt-co-TFEMA)) film via solvent evaporation method. The oxygen-sensing properties, including the sensitivity, fluorescence intensity, and photo-stability, were evaluated based on variable indicator concentration and film thickness. The optimal parameters were determined through a series of parallel experiments. Results indicate a film thickness of 16 μm and an optimal PtOEP concentration of 1.0 mM. Under optimal conditions, the PtOEP/poly(p-FSt-co-TFEMA) fluoropolymer film exhibited an adequate signal-to noise ratio, high oxygen sensitivity and satisfactory anti-photo-bleaching ability.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Chenchen Liu,Yoshinori Yamaguchi,Yi Wang,Xiaoming Dou,Takuya Kubo,Koji Otsuka
In traditional capillary electrophoresis (CE) with fluorescence detection, the difference of the migration time of analytes leads to the inequivalent photobleaching, therefore the quantitative determination of the analytes is usually difficult. Especially, when an internal standard (IS) is used, the fluorescent intensities of analytes are hardly comparable to that of the IS if the inequivalent photobleaching is not restricted. We propose a practical approach to reduce the effect of inequivalent photobleaching via an online fluorescence imaging system coupled with the IS method. The detection was operated by the acquisitions of the fluorescent intensities from the divided small section array in the detection window and the electropherograms were obtained from the integrated each acquisition. Compared with the traditional CE detection method, the proposed method demonstrates a real-time detection to collect the fluorescence signals of different analytes under the definite exposure time, rather than the same traversing length. Experimental demonstration for the proposed method was carried out by using DNA-dye conjugations. As a result, our method provided a lower relative error of the peak area ratio of 0.3–3.2 % and a more practical operation because the efforts to restrict the photobleaching are exempted. Revealed in this paper also includes the fact that the photobleaching process manipulated the determination of the peak width and separation resolution.
研究领域:
分析化学
·
生物医学工程
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DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 6
·1670
·
IF 3.5
Yujie Niu,Jinxin Wang,Zhongxing Zhang,Ting Liu
Gaseous oxygen detection is essential in numerous production and manufacturing sectors. To meet the varying oxygen detection requirements across different fields, techniques that offer a wide oxygen detection range should be developed. In this study, a wood-based oxygen sensing material was designed using balsa wood as the supporting matrix and gadolinium hemoporphyrin monomethyl ether (Gd-HMME) as the oxygen-sensitive indicator. The wood-based Gd-HMME exhibits a cellular porous structure, which not only facilitates the loading of a substantial number of indicator molecules but also enables the rapid interaction between indicators and oxygen molecules.OPis defined as the ratio of the phosphorescence intensity of the oxygen-sensing material in the anaerobic and aerobic environment. A linear relationship betweenOPand oxygen partial pressure ([O2]) was obtained within the whole range of [O2] (0–100 kPa). The wood-based Gd-HMME exhibited excellent resistance to photobleaching, along with a rapid response time (3.9 s) and recovery time (4.4 s). It was demonstrated that the measurement results obtained using wood-based Gd-HMME were not influenced by other gaseous components present in the air. An automatic oxygen detection system was developed using LabVIEW for practical use, and the limit of detection was determined to be 0.01 kPa.
研究领域:
材料科学
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光学传感
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 18
·1900256
·
IF 2.622
Majid Basharat,Wei Liu,Shuangkun Zhang,Yasir Abbas,Zhanpeng Wu,Dezhen Wu
Functional photoluminescent materials with a tunable multicolor emission without incorporation of metals is the current focus on luminescent materials due to their multifaceted applications. Herein, novel poly(cyclotriphosphazene-co-tris(4-hydroxyphenyl)ethane) microspheres are synthesized with size distribution of ≈0.8–1.6 µm by reacting hexachlorocyclotriphosphazene and tris(4-hydroxyphenyl)ethane at different molar ratios under facile conditions. The thermogravimetric analysis shows that the microspheres are highly thermally stable with 10% weight loss at around 500 °C. Fluorescence microscopy results show that the microspheres emit three blue, green, and red colors with an emission maximum at 487, 530, and 623 nm under different excitation wavelengths of 365, 420, and 546 nm, respectively. Furthermore, under UV and visible (365 and 420 nm) excitations, microspheres demonstrate extraordinary photobleaching stability and highly intense luminescence for expending time and repeating excitations. The microspheres also demonstrate semiconductor-like optical absorption at 235–285 nm with a tail extended to 700 nm. This exploration provides an insight for the preparation of intrinsic superior wavelength tunable multicolor emission materials from phosphazene. These microspheres are potential candidates for anti-counterfeits, solar cells, full spectrum fluorescence emitters, organic light emitting diodes, biological, catalysis applications and unlock new areas of research on multicolor photoluminescence.
研究领域:
材料科学
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光学
·
化学
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2012
·
IF 1.829
Xiaoyan Du,Dan He,Zuo Xiao,Liming Ding
Inverted polymer solar cells with a configuration of ITO/ZnO/PBDTTT-C:PC 71 BM/MoO 3 /Ag were fabricated and a power conversion efficiency of 6.64% was achieved under AM 1.5G irradiation (89 mW/cm 2 ). The function of UV light was systematically investigated by tracking the changes of the device performance for 212 min under continuous illumination with or without UV light. We found that UV light plays a decisive role not only in the photo-annealing step, leading to a remarkable increase of PCE by increasing ZnO conductance, but also in the photo-bleaching step, causing slow degradation of solar cells through photo-oxidation of the conjugated polymer.
研究领域:
材料科学
·
光伏技术
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Wen Liao,Can Xu,Xiang Wu,Qiuyan Liao,Ying Xiong,Zhen Li,Hongding Tang
Three new photobleachable cinnamoyl dyes for radical visible photoinitiators (CAs) were prepared by aldol condensation reaction of 2, 4-bis(diethylamino) benzaldehyde and esters (including ethyl acetate, diethyl malonate and ditertbutyl malonate), in comparison with CAs, the ditertbutyl 2-(4-(diphenylamino)benzylidene) malonate (TA) was also prepared. Their structures were confirmed by 1 H NMR, 13 C NMR, HR-MS. The mechanisms of the radicals generated from CAs and TA were proposed through electron paramagnetic resonance (EPR) analysis and steady state photolysis experiments. The investigated CAs and TA can effectively initiate the photopolymerization of 1, 6-hexanediol diacrylate (HDDA) under LED@405 nm exposure. Among these photoinitiators, CA-2 showed the best visible light photoinitiating efficiency and photobleachable characteristic. Furthermore, the residual initiators in cured HDDA polymers were proved to be as low as 0.243% and the obtained colorless polymer was up to 2.8 mm thickness when CA-2 was employed as the photoinitiator. These efficient photobleachable visible initiators show great potentials in deep curing materials.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Kai Wang,Shengjun Xu,Jingzhen Wang,Boqiang Gao,Yan Huang,Jia Song,Shuanglong Ma,Hanzhong Jia,Sihui Zhan
Revealing the structure-activity relationship between physicochemical properties and photoactivities of microplastic dissolved organic matter (MPDOM) is significant for understanding the environmental fate of MPs. Here, we systematically analyzed the physicochemical properties and molecular composition of DOM derived from MPs including polystyrene (PS), polyethylene glycol terephthalate (PET), polyadipate/butylene terephthalate (PBAT), polylactic acid (PLA), polypropylene (PP), and compared their photosensitivity and photobleaching behaviors. Results indicated that PSDOM and PETDOM had more similar properties and compositions, and showed stronger photosensitivity and photobleaching effects than PBATDOM, PLADOM and PPDOM. The [ 3 DOM ∗ ] SS and [ 1 O 2 ] SS varied in the range of 0.31–13.03 × 10 -14 and 1.71–5.49 × 10 -13 M, respectively, which were within the reported range of DOM from other sources. The SUVA 254 , HIX, AI modwa , Xc wa and lignin/CRAM-like component showed positive correlation with the [ 3 DOM ∗ ] SS , [ 1 O 2 ] SS and Φ 3 DOM* . The negative correlation between E 2 /E 3 and [ 3 DOM ∗ ] SS was due to the higher proportion of low-molecular weight components in MPDOM. The lignin/CRAM-like component was identified to be the crucial photobleaching-component. The lignin/CRAM-like in PSDOM showed a deepened oxidation degree, while its change trend in PETDOM was from unsaturated to saturated. These findings provide new insights into the relevant photochemical fate of MPDOM.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
Heliyon
·
2023
·
IF 4
Honglin Zhang,Ke Zhang,Zhiguo Zhiguo,Jian Hao
In this work, the metalloporphyrin film of PtOEP/Poly (St-co-TFEMA) modified by nano Al 2 O 3 powder was prepared, and the enhancement performance of oxygen sensing was studied in detail. It was verified that the modified film extended the residence time of oxygen through the characterization of SEM. The phosphorescence intensity changes with the content of Al 2 O 3 and PtOEP were studied. The Stern-Volmer equations before and after modification of Al 2 O 3 powder was compared. It was found that the linearity of the calibration curve was still high, but the oxygen sensitivity value of K SV was significantly improved due to the increase of quenching probability between indicator and oxygen. Finally, the stability test shows that the Al 2 O 3 @PtOEP/Poly (St-co-TFEMA) oxygen sensing film presents a strong anti-photo-bleaching ability, and the response time is shortened.
研究领域:
材料科学
·
化学传感器
·
光学检测
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Can Xu,Shang Gong,Xiang Wu,Yuwei Wu,Qiuyan Liao,Ying Xiong,Zhen Li,Hongding Tang
The development of dyes with both high initiating efficiency and photobleaching properties is of importance for the photopolymerization of thick materials and still an emerging challenge. Carbazole-based photo-bleachable dyes CMs (CM-1 and CM-2) and CIs (CI-1 and CI-2) as free radical initiators for visible light polymerization were designed and synthesized. Their structures were confirmed by 1 H NMR, 13 C NMR, and HR-MS. Through electron paramagnetic resonance (EPR) analysis and visible light photolysis experiments, the free radical generation mechanisms of CMs and CIs were proposed. CMs and CIs could effectively initiate the photopolymerization of 1, 6-hexanediol diacrylate (HDDA) under LED@455 nm exposure. Among these dyes, CM-2 and CI-2 with carboxylic acid in their structures showed better free radical initiating efficiencies and lower extraction rates. In addition, at a concentration of 2 × 10 −5 mol/L, CM-2/MDEA exhibited the better photopolymerization rates and double bond conversions in comparison to CQ/MDEA systems. Under the irradiation of visible light, in particular, dyes CM-2 and CI-2 could successfully initiate the polymerization of thick films of 12–13 mm to form colorless polymers. Thus, these carbazole-based photo-bleachable dyes have great potential in deep photocuring for the preparation of thick materials.
研究领域:
材料化学
·
高分子化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 33
·5452-5460
·
IF 0
Xinjie Zhang,Chunmei Gao,Shaoyu Lü,Haogang Duan,Nannan Jing,Di Dong,Caifeng Shi,Mingzhu Liu
Optical glucose detection holds considerable promise for continuous in vivo glucose monitoring with wireless transdermal transmission and long-lasting activity. To construct a new class of optical glucose nanobiosensors with high sensitivity and selectivity at physiological conditions, the first generation of fluorescent poly(amido amine) (G1.0 PAMAM), serving as the optical code, was introduced into glucose-sensitive poly(N-isopropylacrylamide-(2-dimethylamino)ethyl methacrylate-3-acrylamidephenylboronic acid) copolymer microgels via a facile method. The fabricated microgels display the ability of adapting to the surrounding medium of different glucose concentrations over a clinically relevant range (0–20 mM) and convert biochemical signals into optical signals. As nanobiosensors, the G1.0 PAMAM functionalized microgels exhibit high selectivity for glucose over various kinds of potential primary interferents, such as lactate, human serum albumin and metal ions, in the physiologically important glucose concentration range. Compared to traditional fluorescent dyes and quantum dots, which are limited by photobleaching and toxicity, this microgel with remarkable anti-photobleaching property and low toxicity makes it possible to be used for long-term continuous glucose monitoring. Through in vivo investigations, it can be observed that G1.0 PAMAM functionalized microgels can achieve wireless transdermal detection, indicating that the fabricated microgels have potential applications as a new generation of nanobiosensors for the highly sensitive and minimally invasive continuous glucose monitoring.
研究领域:
生物医学工程
·
纳米技术
·
生物传感
·
材料科学
·
分析化学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）