JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Yingjie Zhao,Zewen Su,Youqiang Huang,Yuan Liu,Shiqing Xu,Gongxun Bai
The dual-functional optical materials that can achieve accurate temperature sensing and effective photothermal conversion have aroused great concern in biomedical and industrial fields. However, the lack of optical functional materials limits the photothermal devices in practical applications. In this work, the pure monoclinic Ho 3+ /Yb 3+ codoped La 2 Ti 2 O 7 microcrystals have been successfully synthesized for optical thermometry and photothermal conversion. Different from the partial overlap of thermal coupling energy levels in Er 3+ , the wide separation of emission bands in Ho 3+ reduce the calculation error of ratio-metric thermometry. The maximum value of sensitivity reaches 1.41% K −1 . And the light-to-heat energy conversion of the sample has been explored by some photothermal experiments. It is confirmed that the sample can be heated to the specified temperature by adjusting the power of the heating light source. Meanwhile, the photothermal imaging can be achieved because of the high photothermal conversion of the material. Besides, the dual-functional prototype probe based on La 2 Ti 2 O 7 :Ho 3+ /Yb 3+ microcrystals has been made to investigate the temperature sensing and photothermal conversion performance. These results illustrated the sample has potential applications in optical thermometry and biological photothermal therapy.
研究领域:
材料科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2014
·
IF 3.766
Xiaocun Qi,Zhiliang Wang,Songmei Ma,Lianjia Wu,Shuguang Yang,Jian Xu
The complexation behavior of PAA and lanthanide (Ln) ions was schematically investigated. As pH increased, the complexation between PAA and Ln ions will greatly strengthen because COO − groups exhibit much stronger interaction with Ln ions than COOH. When the pH values are higher than 2.5, where the ionization of PAA is about 2.0%, the PAA–Ln complex would precipitate out from the solution. The precipitation is a direct indicator for the complexation between PAA and Ln ions. Besides pH values, the complex precipitation is related with the concentration, the molar ratio, and the operation procedure. At the extremely low concentration, there is no polymer–metal complex precipitation but fluorescence spectroscopy reveals that the complexation between PAA and Ln ions still exists when pH value is higher than 2.5. When the molar ratio of PAA and Ln ions exceeds the certain level, it would produce soluble polymer–metal complex, even at the high concentration of Ln ions.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Weijun Gui,Mingzhe Du,Xianmin Zhang,Miroslav Almáši,Lijia Wan,Lu Gan,Zhenxi Wang,Suhang Wu
The limited luminescence efficiency and poor stability of lanthanide-based metal-organic frameworks (Ln-MOFs) are the key factors restricting their practical applications. It is well known that high-temperature annealing can significantly enhance the photoelectric properties of inorganic materials, but it seems unfeasible for Ln-MOFs due to the existence of organic components. To overcome this dilemma, MOF-76 was synthesized by hydrothermal method and then hydrothermally annealed at 140 °C for 4 h. As a result, the annealing not only significantly improves the crystallinity of MOFs but also promotes their transition from the original tetragonal phase to the monoclinic phase. The annealed MOFs ( a MOF) exhibit about 3-fold emission enhancement and show better stability, especially under alkaline conditions or in water or saturated alkanes, such as cyclohexane, and dichloromethane. The total emission intensity of the as-prepared (AP) MOF is reduced to less than 1/10 compared to the a MOF due to the influence of water molecules. When the material was immersed in a mixture of ammonia and water, the a MOF emission remained stable, while the AP MOF emission rapidly decreased to approximately 12 % with an increasing volume ratio. Additionally, a notably enhanced 5 D 0 → 7 F 1 transition of Eu 3+ ions in MOF-76 has been observed for the first time. It was found that after hydrothermal annealing, the photoluminescence quantum yield of the MOF increases from 10.86 % to 61.48 %, and its synthesis yield can reach 73.8 %. The properties described above remarkably enhance the application values of the a MOFs. Interestingly, MOFs can also be solvothermal annealed, thus the schemes presented in this context open up novel approaches to significantly improve/modify the performance of other MOF materials. Finally, the obtained green and red emitting a MOFs combined with the N-CDs@starch were applied to warm white LED with the colour coordinates (CIE) of (0.3662, 0.3544), colour rendering index (CRI) of 88.5 and correlated colour temperature (CCT) of 4261 K.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Ali A. Altam,Jiali Xu,Mahmoud H.M.A. Shibraen,Kiran Rehan,Hajo Yagoub,Jian Xu,Shuguang Yang
Carboxymethylcellulose (CMC), quaternized cellulose (QC) and lanthanide (Ln) ion ternary complex thin film was fabricated by hierarchical assembly process. CMC is a weak anionic polyelectrolyte while QC is a cationic polyelectrolyte. Strictly controlling pH value and molar ratio, CMC and Ln ion were prepared into polymer-metal complex nano-particles (CMC@Ln) which exhibit negative charge on surface, and then the nano-particles were layer-by-layer (LbL) assembled with positively charged QC to prepare thin films. Three kinds of Ln ion, Ce 3+ , Eu 3+ , and Tb 3+ were successfully incorporated into films separately, and the corresponding films showed blue, green and red fluorescence color. In addition, we can adjust the luminescence of the film with combination of CMC@Ce, CMC@Eu, and CMC@Tb complex nano-particles.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Biomedical Spectroscopy and Imaging
·
2015
·Vol. 4
·期 2
·129-137
·
IF 0
Gao Yunlong,Li Da,Shi Jia-jia,Wang Xiaomin,Kang Tingguo,Weng Shifu,Xu Yizhuang,Noda Isao,Wu Jinguang
Two-dimensional (2D) correlation spectroscopy provides an important approach to the study of subtle spectral variations caused by intermolecular interactions. In our previous work, DAOSD (Double Asynchronous Orthogonal Sample Design) scheme was introduced to analyze subtle spectral variations of characteristic peaks of substance under intermolecular interactions. In this paper, we apply DAOSD scheme to probe weak coordination between lanthanide (III) ions and lactone group of organic ligands from natural pharmaceutical. Weak coordinative interaction between Nd3+ and carbonyl group in Nd(ClO4)3/artemisinin in acetonitrile solutions is characterized by using 2D UV/IR hetero-correlation spectroscopy. Experimental results demonstrate that subtle band-shift and variation on the absorptivity can be observed on both carbonyl band of artemisinin and f–f transition band of Nd3+ ions upon coordination.
研究领域:
药学
·
光谱学
·
配位化学
✓ 已验证
DOI
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Hui Xiong,Hua Liang,Ke Dai,Qiang Tian,Xuezhi Dai,Haifeng Su,Guy Royal
Thorium, as a radioactive element, is always associated with rare earth in nature. So it is an exacting challenge to recognize thorium ion (Th 4+ ) in the presence of lanthanide ions because of their overlapping ionic radii. Here three simple acylhydrazones ( AF , AH and ABr , with the functional group fluorine, hydrogen and bromine, respectively) are explored for Th 4+ detection. They all exhibit excellent “turn-on” fluorescence selectivity toward Th 4+ among f-block ions in aqueous medium with outstanding anti-interference abilities, where the coexistence of lanthanide and uranyl ions in addition with other ordinary metal ions have negligible effects during Th 4+ detection. Interestingly, pH variation from 2 to 11 has no significant influence on the detection. Among the three sensors, AF displays the highest sensitivity to Th 4+ and ABr the lowest with the emission wavelengths in the order of λ AF -Th < λ AH -Th < λ ABr -Th . The detection limit of AF to Th 4+ can reach 29 nM (pH = 2) with a binding constant of 6.64 × 10 9 M −2 . Response mechanism for AF toward Th 4+ is proposed based on the results of HR-MS, 1 H NMR and FT-IR spectroscopies together with DFT calculations. This work provides important implications on the development of related series of ligands in nuclide ions detection and future separation from lanthanide ions.
研究领域:
分析化学
·
放射化学
·
配位化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 126
·期 3
·980-986
·
IF 1.289
Xiaonan Zhu,Yihu Song,Qiang Zheng
A type of lanthanide (La(III))-containing ionomer based on acrylate processing aid (ACR) for poly (vinyl chloride) (PVC) was synthesized, and influence of the ionomer on thermal stabilization of PVC was investigated with visual color comparison and Congo red methods. Results revealed that the ionomer with a suitable La(III) content behaved as a good costabilizer to PVC. It was able to extend static stabilization time of PVC and postpone “zinc burning.” The stabilizing efficiency of the ionomer to PVC depended on ion content, which was discussed in terms of Eisenberg–Hird–Moore model. Moreover, Fourier transform infrared test verified that this ionomer can react with zinc stearate (ZnSt 2 ) to form some new structures, which is responsible for postponing “zinc burning.” The ionomer and epoxidized soybean oil exhibited a synergistic effect on the stabilizing efficiency of calcium stearate (CaSt 2 )/ZnSt 2 stabilizer to PVC compounds. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Shaoxiong Zhang,Weidong Yin,Zengming Yang,Yuan Yang,Zhao Li,Shengjun Zhang,Bo Zhang,Fenghao Dong,Jiawei Lv,Bingyang Han,Ziqiang Lei,Hengchang Ma
Lanthanide(III)-based luminescent materials have attracted great research interests due to their unique optical, electronic, and chemical characteristics. Up to now, how to extend these materials into large, broad application fields is still a great challenging task. In this contribution, we are intended to present a simple but facile strategy to enhance the luminescence from lanthanide ions and impart lanthanide(III)-based luminescent materials with more applicable properties, leading to meet the requirements from different purposes, such as being used as highly emissive powders, hydrogels, films, and sensitive probes under external stimuli. Herein, a water soluble, blue color emissive, temperature sensitive, and film-processable copolymer (Poly-ligand) was designed and synthesized. Upon complexing with Eu3+ and Tb3+ ions, the red color-emitting Poly-ligand-Eu and green color-emitting Poly-ligand-Tb were produced. After finely tuning the ratios between them, a standard white color emitting Poly-ligand-Eu1:Tb4 (CIE = 0.33 and 0.33) was obtained. Furthermore, the resulted materials not only possessed the emissive luminescent property but also inherited functions from the copolymer of Poly-ligand. Thus, these lanthanide(III)-based materials were used for fingerprint imaging, luminescent soft matters formation, colorful organic light-emitting diode device fabrication, and acid/alkali vapors detection.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2014
·Vol. 16
·期 33
·7711-7721
·
IF 3.858
Jun-Hui Xue,Xiao-Hui Hua,Li-Min Yang,Wei-Hong Li,Yi-Zhuang Xu,Guo-Zhong Zhao,Gao-Hui Zhang,Ke-Xin Liu,Jia-Er Chen,Jin-Guang Wu
Four kinds of coordination structures formed by lanthanide–picolinamide complexes, including [La(C6H6N2O)2(H2O)5]Cl3 (La–pa, Pr–pa, Nd–pa, Sm–pa and Gd–pa), [Er(C6H6N2O)2 (H2O)4]Cl3(H2O) (Er–pa), [Pr(C6H6N2O)2(H2O)5]Br3 (PrBr–pa) and [Nd(C6H6N2O)3(NO3)2] (C6H6N2O)(NO3) (NdN–pa) are reported. The crystal structures in the solid state vary with the change of anions and lanthanide ions as revealed by X-ray single crystal diffraction, FTIR, Raman, FIR and THz spectroscopy. In these crystal structures, the pyridyl nitrogen and carbonyl oxygen of picolinamide are coordinated to metal ions to form a five-membered ring structure or are hydrogen-bonded. The results indicate the differences in the coordination of different lanthanide ions (the Er ion is special for its small atomic radius), the changes of hydrogen bonds and the conformation of the ligands induced by complexation, and the influence of different anions. When nitrate ions are involved in the coordination structure, the coordination number of lanthanide ions is higher. Chloride and bromine ions do not coordinate to metal ions, so lanthanide bromine and lanthanide chloride–pa complexes have similar structures. The results provide models for the coordination structures of lanthanide ions with ligands that have amide groups.
研究领域:
化学
·
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
·
2018
·
IF 2.067
Chunxia Jiang,Yiping Tang,Zhi Zeng,Jinwei Gao,Maosheng Li,Yuhui Zheng
Europium incorporated molybdenum carbide (Mo 2 C) has been assembled at 800 °C based on a single step and the synthesis processes have been discussed. (NH 4 ) 6 Mo 7 O 24 ·4H 2 O has been employed as a precursor and p -phenylenediamine has been selected as the carbon source. In contrast to conventional organic dyes, this novel lanthanide-activated phosphor provides red luminescence in the form of higher monochromatic purity due to the parity forbidden transitions. More importantly, the emission intensity of 5 D 0 → 7 F 2 transition increased depending on the incorporation of europium ions and the most suitable doping concentration will be 0.3 mmol. The utilization of f – f transition of Eu 3+ in molybdenum carbide has made the red emission materials accessible for application in the area of display, electronics and bio-imaging.
研究领域:
材料科学
·
光学
·
生物成像
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2023
·
IF 5.5
Qiu Huandi,Ran Qimeng,Bai Yun,He Wei,Zheng Li,Pan Cong,Jia Kun,Hu Yiguo
Lanthanide coordinating polymeric microparticles have witnessed increasing research interests during the past decades due to their versatile morphology and tunable fluorescent properties. Herein, we have synthesized an amidoximed block copolymer containing aromatic backbone and pendent amidoxime as well as carboxyl groups, which has been employed as the ligand to sensitize the intrinsic fluorescence emission of lanthanide ions of Tb3+ and Eu3+. Furthermore, the lanthanide coordinating polymeric microparticles showing tunable green and red emission fluorescence have been prepared via the emulsion confinement co-self-assembly of amidoximed polymeric ligands with Tb3+ and Eu3+. It is found that both the fluorescence emission and sizes of obtained fluorescent microparticles can be easily modulated in a wide range by tuning concentration of polymers and lanthanide ions, as well as emulsion evaporation temperature. Thanks to their tunable sizes (250–900 nm), fluorescence emission as well as presence of surface active functional groups, the present fluorescent microparticles would find potential applications in in-vitro detection, optical encoding and devices.
研究领域:
材料科学
·
化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 25
·9284-9292
·
IF 5.7
Chengxue Du,Dangli Gao,Xiaochun Hou,Xiangyu Zhang,Qing Pang,Sining Yun
The development of luminescent materials for optical information encryption has received great attention in recent years. However, single-mode luminescent materials greatly limit their information capacity and encryption level. Here, a broad range of gadolinium gallate-based oxide persistent material systems with tuneable persistent luminescence (PersL) are rationally designed by the construction of electron–hole defect pair structures between Bi3+ and a set of lanthanide ions (Ln3+) (Ln = Eu, Sm, Tb, Dy, Pr and Ce). These phosphors exhibited excellent quadruple-mode luminescence including photoluminescence (PL), PersL, thermoluminescence (TL) and photo-stimulated luminescence (PSL). In particular, a quadruple-mode ‘morning glory’ encrypted pattern using these multimode persistent phosphors as storage media demonstrates multilevel optical information storage accompanied with dynamical encryption. These findings described here provide a universal methodology to construct a novel class of persistent materials with tuneable PersL emission and high information storage capacity.
研究领域:
材料科学
·
光学工程
✓ 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）