DYES AND PIGMENTS
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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
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化学工程
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高分子化学
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
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2017
·Vol. 94
·期 1
·179-185
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IF 2.121
Heng Zhang,Shupeng Liu,Xiangfei Yang,Na Chen,Fufei Pang,Zhenyi Chen,Tingyun Wang,Jianshe Zhou,Fuji Ren,Xiaoyin Xu,Taihao Li
Tiny but highly efficient, a light-emitting diode (LED) can power a therapy device, such as a phototherapy device, and, at the same time, decrease the device's size requirements. In this study, a LED phototherapy device was designed to investigate the possible impact on wound healing using a mouse model and a cell line exposed to red and blue light. To enhance wound phototherapy, a gelatin sponge was fabricated. Results showed that the red and blue lights promoted cell growth and wound healing, while the blue light with a gelatin sponge protected the wound from infection in the early stages of wound healing. The LED phototherapy device combined with the gelatin sponge, therefore, has potential significance in clinical application for wound healing.
研究领域:
生物医学工程
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细胞生物学
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创伤修复研究
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 133
·期 13
·
IF 1.768
Xiaoqing Dong,Weizhen Shen,Peng Hu,Zhiquan Li,Ren Liu,Xiaoya Liu
The narrow emission spectra of light emitting diodides (LED) as irradiation source has brought great challenge for the development of efficient photoinitiators sensitive to LED light. This paper described a series of novel unimolecular type II photoinitiators, containing thioxanthones as chromophores and benzodioxoles as coinitiators. The structures of the photoinitiators were characterized by 1 H NMR, 13 C NMR and high-resolution mass spectrometer. Study on the photophysical properties of the photoinitiators indicated that electron donors/acceptors as spacers between thioxanthone and benzodioxole affected both the UV–Vis absorption and the fluorescence emission. The long wavelength absorptions from 385 nm to 402 nm as well as low fluorescence quantum yields make the investigated benzodioxole derivatives quite attractive as efficient photoinitiators under UV-A and visible LED light irradiation. With a proper molecular design, the unimolecular photoinitiator exhibited higher initiation efficiency than the thioxanthone derivatives from the literature. Possible initiation mechanism was also proposed based on the photolysis study. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43239.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Xiaoyu Ma,Ding Cao,Xiaotong Hu,Jun Nie,Tao Wang
Novel photoinitiators (α-DKs) bearing α-dicarbonyl groups as initiating group and aromatic groups as chromophore group were synthesized and developed as visible light type I photoinitiators with high performance for radical photopolymerization of acrylate. α-DKs exhibit good absorption at 405 nm and higher initiation efficiency compared with commercial initiator camphorquinone (CQ) under LED sources. Meanwhile, α-DKs were found to efficiently photosensitize bis (4-methylphenyl) hexafluorophosphate (ION) and initiate both free radical polymerization and cationic polymerization.
研究领域:
材料化学
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光化学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yinping Wu,Jiasheng Ke,Changxiang Dai,Jiuwu Wang,Chenguang Huang,Yue Situ,Hong Huang
In recent years, the light source for photopolymerization technology is evolving from energy-hungry mercury lamps to the safer light-emitting diodes (LEDs), and it is urgent to develop new photoinitiator adapted to the photopolymerization system with LED light source. Some acyldiphenylphosphine oxide photoinitiators have been designed and developed for LED light source, but their application is severely limited in the fields of food packing, medical equipment, environmentally-friendly product etc. due to their high mobility in photocured polymers. In this study, eight acyldiphenylphosphine oxide molecules (DAPO-1 ∼ DAPO-8) were synthesized by introducing large molecular weight groups and their UV–visible absorption, photodegradation quantum yield, photopolymerization properties, mobility and solubility in monomer were determined. Thereinto, photoinitiators show lower mobility than TPO, the photoinitiator commonly used in industry, as well as good solubility in monomers and excellent photopolymerization performance. Therefore, they can serve as potential substitutes for commercial TPO, especially in the application of low-migration photocurable system.
研究领域:
材料科学
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聚合物化学
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产品关联
DOI
高影响因子
RSC Advances
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2016
·Vol. 7
·期 2
·914-918
·
IF 3.289
Ruixin Xu,Xiaoyuan Guan,Minghui He,Jianwen Yang
Photocaged amines (PCAs) can allow a spatiotemporal control of the highly versatile and widely implemented nucleophile-catalyzed thiol-Michael addition reaction. However, a major challenge with most PCAs is that their relatively low quantum yields easily lead to low photosensitivity, especially under the radiation of light-emitting diodes (LEDs). In this paper, the phototriggered base proliferation (PBP) reaction as a powerful 365 nm LED photoclick tool is presented for the nucleophile-initiated thiol-Michael addition reaction. Compared to the PCA system, the advantages of this approach lie in its enhanced photosensitivity, increased reaction rate and elevated conversion. Finally, due to the persistent interactions of the produced longeval amine, remarkable post conversion was thus initially achieved after irradiation.
研究领域:
有机化学
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光化学
·
生物化学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2021
·
IF 5.161
Xiaobing Ju,Xiuyuan Hu,Yanjing Gao,Jun Nie,Fang Sun
This work reports two hydrogen donor-containing naphthalimide benzyl thioether photoinitiators (NBT-HD1 and NBT-HD2), combining characters of one-component and two-component photoinitiators, for LED photopolymerization . They have good absorptions at emission wavelengths of LED and their ɛ max are more than or close to 1 × 10 4 M −1 cm −1 . Both photoinitiators can generate radicals having initiating ability through not only the cleavage of C S bonds, but also intermolecular hydrogen abstractions themselves under 405 nm LED irradiation. NBT-HD2 with acryloyl group presents an excellent capability of reducing oxygen inhibition. Moreover, NBT-HD1 or NBT-HD2/iodonium salt can trigger the cationic photopolymerization of the epoxide under 405 nm LED irradiation. More significantly, NBT-HD2 with acryloyl group exhibits a prominent migration stability in the polymer film and has broad application prospects in the field of food packaging and biomaterials.
研究领域:
材料科学
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化学工程
·
高分子化学
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产品关联
DOI
高影响因子
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
·
2024
·
IF 1.6
Zhang Xiaoning,Han Qingxin,Hu Xiaoqing,Zhang Lei,Kang Xiaoya,Li Ming,Gao Qiang,Liu Fengyi,Sun Jingyao,Zhu Jingxian,Zhuang Jian
This article proposes a new process for fabricating a polymer microneedles (MNs) patch integrated with an LED light source (LED-HEMA/MN, LH-MN) using ultraviolet (UV) curing technology. Hydroxyethyl methacrylate (HEMA) is used as the base material, with a focus on studying the active integrated fabrication process of the MNs patch. The study also investigates the morphology, size, mechanical properties, ex vivo skin penetration performance, operating temperature, and performance optimization of the LH-MN. The experimental results show that the LH-MN fabricated using the optimal process has a good appearance, high molding rate, short production cycle, and excellent mechanical properties. It can effectively penetrate the skin without the risk of thermal injury. In addition, the MNs patch (LED-HEMA/HEA-MN, LHH-MN) prepared by optimizing and modifying with hydroxyethyl acrylate (HEA) possesses good flexibility and mechanical properties. It can adapt to different shapes and locations of the affected area, greatly enhancing the practicality of the MNs.
研究领域:
生物医学工程
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材料科学
·
医学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Yinping Wu,Changxiang Dai,Jiasheng Ke,Rui Tang,Chenguang Huang,Jiuwu Wang,Yue Situ,Hong Huang
Three type I radical photoinitiators (BTPO-1–BTPO-3) containing two acylphosphine oxide structures were designed and synthesized for UV-LED photopolymerization . Three kinds of substituents with different lengths of ethoxy chains were introduced into the molecular structure to form a bisacylphosphine oxide photoinitiator. The effects of different lengths of glycols on the performance of bisacylphosphine oxide photoinitiators were explained by UV–vis absorption spectra , photopolymerization properties, steady-state photolysis, solubility in monomers , and mobility. All of the three new photoinitiators BTPO-1/BTPO-2/BTPO-3 not only possess good solubility in acrylate monomers and excellent photopolymerization properties, but also their mobility in cured films is undetectable by extraction method and UV–Vis spectrum technology. Compared with the mobility of conventional commercial photoinitiator TPO-L (0.98 %), the high molecular weight bisacylphosphine oxides show higher migration stability and environmental friendliness. The results show that the novel bisacylphenylphosphine oxide BTPO-1/BTPO-2/BTPO-3 have great potentials as type I free radical photoinitiator for LED light-curing technology in food packaging and biomedical materials fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Feifei Li,Lin Zhou,Ziqi Zhang,Mengmeng Li,Lin Lei
A facial white light-emitting diode (LED) induced reversible deactivation radical polymerization (RDRP) of methacrylate monomers was successfully conducted by using sub-ppm-level organic dyes as organocatalysts. The organic dyes contained Eosin B (EB), Rose bengal (RB), Eosin Y (EY) and 3,3,5,5-Tetraiodophenolsulfonphthalein (TIPS) with the merits of metal free, non-toxic and inexpensive. The resulted poly (methacrylate) with controlled molecular weights and polydispersity indices were obtained either under white LED irradiation or green and blue LED. The polymerization of various functional methacrylates demonstrated that this polymerization system with dyes as organocatalysts had high monomer versatility. Chain extensions copolymerization verified the living features of reversible deactivation radical polymerization.
研究领域:
高分子化学
·
材料科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Miao Ma,Qing Wang,Qianqian Su,Weizhe Liu,Hui Xia,Caixia Zhou,Mengtian Li,Fang Yang,Fujian Xu
Blood uric acid (UA) levels are closely associated with various diseases. This study presents a novel UA photothermal detection system. UA reacts with uricase to generate hydrogen peroxide, which then oxidizes 3,3′,5,5′-tetramethylbenzidine (TMB) into oxidized TMB (oxTMB) in the presence of copper ions as the catalyst. Crucially, instead of expensive laser, Light Emitting Diode (LED) was applied to offer the irradiation on oxTMB, inducing a temperature increase. The increment of temperature measured by a handheld household thermometer exhibits a linear correlation with the concentration of UA in the samples. This method demonstrates enhanced detection sensitivity and excellent anti-interference capabilities. It has been successfully applied to precisely determine UA levels in volunteer blood samples. The sensing platform achieves portable UA detection in human blood within 3 min, featuring a linear response range of 50–400 μM, a detection limit (LOD) of 14.4 μM. This work establishes a novel miniaturized LED-based photothermal (LED-PT) uric acid detection device, holding significant potential for rapid, portable UA monitoring in healthcare and clinical diagnostics.
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Xiyu Zou,Yuzhe Hua,Xiangyang Du,Yunan Shen,Zilong Chen,Huachong Chen,Hui Sui,Guangmin Ren,Qingjie Guo,Man Wu,Hongjing Tian
Addressing such limitations of traditional photocatalysts as poor visible light absorption, substantial electron-hole recombination, and inefficient reactive oxygen species (ROS) generation is crucial. In this paper, oxygen vacancies (OVs) rich Bi 2 MoO 6 (BMO)/ZnSe S-scheme heterojunction was successfully prepared using a simple and mild solvothermal method. The introduction of OVs effectively shortened the band gap and increased the visible light absorption range. The mechanism of inducing OVs into BMO by adapting the concentration of surfactants was uncovered using both experimental and DFT simulation results. OVs-BMO/ZnSe exhibited an enhanced charge transfer capacity because OVs facilitated the formation of a rapid electron transfer pathway at the heterojunction interface. The synergistic effect of OVs and S-scheme heterojunction could effectively inhibit the recombination of photogenerated carriers. Its degradation efficiency and turnover frequency per wattage of light (TOF/P) reached 92.1% and 854.98 × 10 -10 (mol·g −1 ·J -1 ), respectively, during the low power LED white light-driven photocatalytic degradation of 50mg/L TC. The high value of TOF/P demonstrated its practical application potential in comparison with some other reported photocatalysts. Liquid Chromatography-Mass Spectrometry (LC-MS) characterization and ECOSAR simulation results indicated that OVs promoted the generation of ROS, in which ·O–2, 1 O 2 and h + significantly reduced the toxicity of intermediate products.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）