CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Shigang Wan,Dongxuan Wang,Yizhong Shi,Shuoran Chen,Changqing Ye
Graphical Two photochemically deoxygenating compounds, PEG-200 and PEGDA-575, have been used as solvents for triplet-triplet annihilation upconversion in air, with both serving as sensitized singlet oxygen scavengers. A high-level information encryption platform has been developed using Pt(OEP)/DPA/PEGDA-575 or Pt(OEP)/DPA/PEGDA-575/PEG-200 ink that enables data to be read under specific light or at a certain time and erased by light exposure. Photochemical deoxygenation offers a promising solution to the oxygen sensitivity issue in Triplet-triplet annihilation upconversion (TTA-UC). This study utilized polyethylene glycol (PEG)-200 and polyethylene glycol diacrylate (PEGDA)-575 as solvents and singlet oxygen scavengers for TTA-UC conducted in air. The upconversion efficiency of Pt(OEP)/DPA in aerated PEG-200 is similar to that in nitrogen-saturated PEG-200. Prolonged 532 nm light irradiation causes a PEGDA-575 solution of Pt(OEP)/DPA to undergo photoinitiated polymerization via homomolecular TTA, leading to a reduction in DPA's upconversion emission and an increase in Pt(OEP)’s phosphorescence. These results enabled the development of a high-level information encryption platform using the direct-writing method with Pt(OEP)/DPA/PEGDA-575 or Pt(OEP)/DPA/PEGDA-575/PEG-200 ink. The information is only readable under certain lighting conditions or at specific times and can be erased by exposure to light.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xiao-mei Zhang,Wei-long Zhang,Hui Yu,Xiang-ting Dong,Long Xia
The porous Eu(TTA) 3 (TPPO) 2 /SnO 2 (ETTS, TTA: 2-thenoyltrifluoroacetonate and TPPO : triphenylphosphine oxide) composite was prepared via sol-gel method with tetraethyl orthosilicate (TEOS) as catalyst which showed the cumulate litchi shell-like structure. The Eu(TTA) 3 (TPPO) 2 organic complexes (ETT) could be absolutely distributed into the pores of the SnO 2 matrix at the molecular level through sol-gel process. SiO 2 was used as the hard template which was removed to increase porosity during the prepared process. The red emission of ETTS was exhibited under the 368 nm excitation light, and much better luminescence properties was shown after washing off SiO 2 (ETTS-W) which was about 4 times of unwashed ETTS (ETTS-UW) and 15.6 times of ETT for 615 nm emission when Eu content was 6 wt%. The excellent luminescence property of ETTS-W samples was mainly attributed to the organic ligands, the pore structure after removing SiO 2 and stronger ultraviolet absorption capacity of SnO 2 matrix.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Minjia Meng,Mengqi Bai,Zulin Da,Yanhua Cui,Bingrong Li,Jianming Pan
Selective fluorescent molecularly imprinted membrane (FMIM) for salicylic acid (SA) was successfully prepared by phase inversion technique with SA as template molecule, chitosan (CHI) as functional polymer , and Eu(TTA) 3 phen/PAMAM composed of Eu(TTA) 3 phen and the dendrimer (PAMAM) as the fluorophore, which was characterized by SEM, AFM, and XPS techniques. The introduction of the hydrophilic Eu(TTA) 3 phen/PAMAM into FMIM was able to improve the flux and the adsorption capacity of SA with good fluorescent stability. Among the FMIM, the FMIM2 prepared with 2.0% Eu(TTA) 3 phen/PAMAM in the cast membrane fluid was the optimal fluorescent imprinted membrane for selective detection of SA, which displayed a relatively wider linear range and lower limit of detection (LOD) (24 mg L −1 ). The imprinted FMIM2 could selectively detect the SA from complicated samples without obvious interference from analogues compared to the non-imprinted FNIM2. Moreover, the FMIM had promising recycling performance. It can be potentially used as an alternative imprinted membrane for selective detection and separation of trace SA in water.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Aiqin Zhang,Zhi Wang,Weize Hong,Yining Zhang,Jiandong Guo,Yongchao Wang,Yanqin Miao,Husheng Jia,Hua Wang,Bingshe Xu
A novel bonded phosphor poly(Eu(TTA) 2 (phen)MAA-co-VA) (Eu-PVA, for short) was prepared employing the technology of coordination-polymerization-alcoholysis. The bonded Eu-PVA fluorescent nanofibers were prepared by electrospinning, having the initial decomposition temperature of 290 °C higher 51 °C than that of the doped nanofibers. A relationship is established between the fiber morphology and the fluorescence intensity of the bonded fiber Eu-PVA, predicting fluorescence quenching according to the morphological evolution. Compared with the corresponding fluorescent phosphors, both doped and bonded fluorescent fibers exhibit obvious fluorescence enhancement effects in that nanofibrosis increase the specific surface of the fibers and decrease the diffuse reflection and the light loss owing to the smoother surface of the fibers than that of the phosphors. Furthermore, security paper with both masking and security has been fabricated applying the bonded fluorescent nanofibers into pulp, being extended to the development of banknotes, bills, and securities.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Weihao Ma,Hao Zhang,Jiayuan Nie,Chunyu Qiang,Zhiwei Li,Ling Ma,Ke Wang
In this study, a novel magnetic covalent organic framework (Fe 3 O 4 @SiO 2 -HBTA-TTA-COF) was synthesized, which was fully characterized by scanning electron microscopy, transmission electron microscopy, etc. Furthermore, a new method was developed for the determination of 25 quinolones (QNs) in water and milk using the Fe 3 O 4 @SiO 2 -HBTA-TTA-COF as magnetic solid-phase extraction adsorbent coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Meanwhile, various experimental parameters were optimized including sample solution pH, adsorbent dosage and extraction time, etc. Under the optimal conditions, good linearity in the range of 0.1–200 μg·L −1 (R 2 ≥ 0.999) were obtained, the recoveries of 25 QNs were 70.04 %–104.4 % with the relative standard deviations lower than 9.87 % (n = 5), the limits of detection were 0.003–0.010 μg·L −1 for water and 0.018–0.722 μg·kg −1 for milk. This established method was high-sensitive and high-throughput, which can be used as a good alternative method for the selective determination of 25 QNs in water and milk.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Siyang Wang,Jianfeng Hu,Peng Xie,Yinghao Yu,Zhengguo Zhang
Metal-based phase change composites (MPCMs) with high thermal conductivity and energy density are promising candidates for advanced thermal management applications, especially in medium-temperature. However, interfacial reactions between the metal framework and the encapsulated metal phase change material frequently compromise their stability. In this study, we developed a stabilized copper foam(CF)/bismuth‑indium(Bi In) MPCM through vacuum pressurized impregnation process and interfacial modification with 2-thenoyltrifluoroacetone (TTA). The porous CF was functionalized with the chelating ligand, TTA, forming a passivation layer that effectively suppresses the interfacial formation of copper‑indium intermetallic compounds (IMCs). The Bi In alloy was then infused into the foam structure using a vacuum pressurized impregnation process, yielding a uniform composite with exceptional properties, including high thermal conductivity (37.92 W/m·K), substantial latent heat (357.44 J/cm 3 ), and excellent latent heat retention (91.23 % after 200 cycles). SEM and XRD revealed that the IMC growth rate in TTA-modified samples significantly slowed during thermal aging. This work introduces a novel strategy for fabricating high-performance MPCM's and paves the way for broader applications in industrial waste heat recovery, thermal management of high-power electronics, and thermal cushioning in vehicle components.
研究领域:
材料科学
·
热工学
·
纳米技术
·
化学工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 5
·354
·
IF 4.3
Wanqian Wei,Yu Shi,Keqing Zhang,Baohui Li
In this paper, a novel robust TFPA–TTA–COF coating with nano pores was grafted to the gully-like surface of stainless steel fibers (GS-SSF). The GS-SSF were prepared using a two-step electrochemical etching method, and the covalent organic framework (COF) TFPA–TTA–COF coating was chemically bonded to the gully-like surface via in situ growth. The prepared metal fibers were applied as the headspace solid-phase microextraction (HS-SPME) fibers and combined with gas chromatography (GC) to develop a detection method for phenolic compounds (PCs) in water. The developed method gave the limits of detection (S/N = 3) from 0.07 µg·L −1 to 0.52 µg·L −1 with enrichment factors from 243 to 2405. The relative standard deviations for inter-day study (n = 5) and fiber-to-fiber were from 3.94% to 8.89% and 2.17% to 8.05%, respectively. The prepared fiber could stand at least 180 cycles without remarkable loss of extraction efficiency. The developed method was successfully employed for the determination of trace PCs in environmental water with recoveries from 84.76% to 124.84%.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2021
·
IF 4.291
Xue Li,Wenting Liu,Jiaojiao Fang,Hengming Huang,Cheng Zhu,Yaru Ni,Liang Fang,Jiahui Kou,Chunhua Lu,Zhongzi Xu
The incorporation of multiple up-conversion (UC) materials into dual-layered UC films presents a promising strategy for achieving multi-peaks spectrum. Here, we developed dual-layered UC films containing triplet-triplet annihilation up-conversion luminescence (TTA-UCL) chromophores and NaYF 4 :Yb 3+ ,Tm 3+ nanoparticles to enable multi-peaks emissions at 340−360 and 390 nm in the transmission manner and 340, 360 and 400–440 nm in the reflection manner under irradiations of green and NIR light. The light absorption and emission behaviors from different film surfaces were studied clearly. Besides, TiO 2 and g-C 3 N 4 with different absorption spectra were chosen to verify the availability of the dual-layered films to tune emission spectra. When both green and NIR light were used simultaneously, TiO 2 and g-C 3 N 4 can degrade tetracycline (TC) by 2.14 and 1.77 times more than the cases where single light was used alone. The photocatalytic abilities of TiO 2 or g-C 3 N 4 can be further improved by the selective increase in NIR or green light power density due to their different absorption spectra. The dual-layered films containing TTA-UCL chromophores and NaYF 4 :Yb 3+ ,Tm 3+ nanoparticles provide a candidate framework for UC systems with tunable short-wavelength spectra to expand their applications in the fields of photocatalysis.
研究领域:
材料科学
·
光催化
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）