Advanced Optical Materials
·
2021
·Vol. 10
·期 3
·2101843
·
IF 9.926
Ziyu Chen,Jiaxin Yang,Rui Xu,Zejia Zhao,Xu Sang,Lisa Liu,Ming Feng,Feng Song,Yonghong He,Wei Huang
Optical encryption provides a significant implementation strategy for information security, which can be ascribed to multichannel, simple operation, and high security. Multiple responsive luminescent material has emerged as an ideal candidate for optical encryption, owing to intelligent responsive ability and unclonable security. Herein, a structural doping strategy is developed in the layer-by-layer self-assembly process to elevate the maneuverability of light-emitting color and mode. By encapsulating lanthanide doped inorganic matrix and layered hydroxide with PMA, the recognizable red-orange fluorescence can be produced in the invisible region, and realizes the conversion of yellow and green fluorescence in visible region. Meanwhile, both excitation source and emission color can be used as distinguishable encryption means, which enables structural doping complex to be multiplexed and encoded with high capacity and complexity. Furthermore, asymmetrically and symmetrically coded flexible labels with specific color sequence are prepared by brushing process, and specific encryption key are set to ensure the nonlinearity of cryptosystem. Through the integration of dual-mode and adjustable light response codes constructed by structural doping strategy, multidimensional high-level information encryption can be realized, which opens up a deep exploration in the field of information security for the application of multifunctional optical properties of light response materials.
研究领域:
材料科学
·
纳米科技
·
光学工程
·
信息安全
·
功能材料
·
光子学
·
智能材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 5
·7913-7919
·
IF 5.532
Rui Li,Panlai Li,Guohui Wei,Jiehong Li,Yawei Shi,Ye Wang,Shaoxuan He,Yuanbo Yang,Wenge Ding,Zhijun Wang
Developing novel optical thermometry with ultrahigh relative sensitivity and temperature resolution has become a cutting-edge topic. For this purpose, under obeying Boltzmann distribution , a series of Li 2 Zn 0.9992-x A x Ge 3-y B y O 8 :0.08% Cr 3+ (B= Sc 3+ , In 3+ , A = Si 4+ ) phosphors were studied, which the luminescence intensity ratio between the transition of 4 T 2g → 4 A 2g emission and the R line based on thermally coupled energy levels constitutes a temperature sensing work with a relative sensitivity of 9.46% K −1 , 9.73% K −1 , and 10.38% K −1 , respectively. It is worth mentioning that the luminescence intensity of the R line (peak 1) increases significantly with the increase of temperature, while the transition of 4 T 2g → 4 A 2g (peak 2) with high intensity at low temperature gradually quenching, and this opposite trend is an important advantage for the design of excellent thermometers. Compared the best relative sensitivity of Li 2 Zn 0.9992-x A x Ge 3-y B y O 8 :0.08%Cr 3+ (B= Sc 3+ , In 3+ , A = Si 4+ ) with the crystal field Dq /B, it can be concluded that relative sensitivity increasing gradually with decreasing the intensity of crystal field. Finally, by testing the stability of the sample at 50 K, a thermal resolution of 0.082 K, 0.080 K and 0.077 K was obtained, respectively, which is one of the best thermal resolutions so far, while the repeatability of the sample stability at 50 K and 300 K cycles was higher than 99%. Our work is expected to provide guiding insights for optimizing the sensitivity of Cr 3+ -based luminescence intensity ratio thermometers.
研究领域:
材料科学
·
光学传感
·
固体物理
·
低温物理学
·
功能材料
·
发光材料
✓ 已验证
DOI
高影响因子
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2013
·Vol. 12
·期 9
·1628-1635
·
IF 2.923
Li Qiu-Ping,Yan Bing
A series of luminescent polymers are synthesized by incorporating rare earth complex units into polymer matrices. Firstly, we functionalize the selected polymer matrices with the imidazolium moieties, and then introduce the rare earth tetrakis(β-diketonate) complexes into polymer matrices through a mild anion exchange method. The resulting materials are characterized by FTIR, XRD, EDAX, SEM, thermogravimetric analysis, luminescence excitation spectra and emission spectra, luminescence lifetime measurements and diffuse reflectance UV-Vis spectra. The photoluminescence measurements indicate that all these rare earth complex functionalized polymers exhibit a characteristic luminescence emission originating from the corresponding rare earth ions. Among the hybrids, the europium tetrakis(TTA) complex functionalized polymers show remarkable luminescence quantum yields and relatively long 5 D 0 lifetimes at room temperature.
研究领域:
材料化学
·
高分子科学
·
光物理学
·
无机功能材料
·
发光材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Decai Huang,Sisi Liang,Dejian Chen,Jie Hu,Kunyuan Xu,Haomiao Zhu
The emerging applications of near-infrared (NIR) spectroscopy technology in medicine and food security call for compact and efficient NIR light source such as NIR phosphor converted LEDs (pc-LED). Currently, most of the NIR phosphors suffer from low photoluminescence (PL) quantum yield and poor thermal or chemical stability. Herein, a fluoride garnet NIR Na 3 Al 2 Li 3 F 12 :Cr 3+ phosphor was successfully synthesized via coprecipitation method. It can be excited efficiently by blue or red light and shows a broad emission band covering 650–1000 nm (bandwidth of ~110 nm) with a PL quantum yield of 78%. The fine electronic structure of Cr 3+ ions in the host was revealed by the measurement of temperature-dependent (8–300 K) excitation and emission spectra analysis. Particularly, at 423 K, the Na 3 Al 2 Li 3 F 12 :5%Cr 3+ sample retained ~99% of the PL intensity at room temperature, exhibiting excellent PL thermal stability. A NIR pc-LED was fabricated by combining the Na 3 Al 2 Li 3 F 12 :5%Cr 3+ phosphor with a commercial blue LED chip, and radiant flux of 14.3 mW in NIR region was obtained at 60 mA drive current. Furthermore, the penetration of NIR light generated by this pc-LED in chicken breast was reached. The results suggested that Na 3 Al 2 Li 3 F 12 :Cr 3+ is a promising candidate for broadband pc-LED in NIR spectroscopy applications.
研究领域:
材料科学
·
光学工程
·
生物医学光子学
·
半导体器件
·
分析化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
C. Wang,X.Z. Zheng,L. Yue,P.J. Xia,M. Xu,W.B. Dai
The exploration of stable/efficient phosphor for n -UV chip pumped white light-emitting diodes ( w LEDs) remains an arduous task. Herein, a novel series of color tunable Eu 2+ /Tb 3+ /Sm 3+ tridoped Sc-based cyclosilicate phosphors (KBaScSi 3 O 9 : Eu 2+ /Tb 3+ /Sm 3+ ) have successfully designed and obtained via facile solid-state reaction based on comprehensive consideration of rigidly structural network of host, weak electron-phonon coupling strength and spectral adjustability of codopants via energy transfer (ET). The crystallographic occupancies of Eu, Tb and Sm primary in Ba/K, Ba and Ba sites in the monoclinic host, respectively were determined on the basis of the Rietveld refinements and crystal chemistry rules. The photoluminescence (PL) properties were systematically investigated in conjunction with structural analyses, implying that the ‘warm’ white light with excellent thermal stability is stemmed from combination of optimized blue (Eu 2+ ), green (Tb 3+ ) and red (Sm 3+ ) emissions via Eu → Tb → Sm ET strategy. Interestingly, Tb ions play both roles of green light luminescent center and ET bridge to achieve cascade ET for connecting Eu/Sm ion pairs because of the adverse metal-metal charge transfer (MMCT) effect (Eu 2+ + Sm 3+ → Eu 3+ + Sm 2+ ). Furthermore, the phosphor-converted w LEDs (pc- w LEDs), by encapsulating the optimal KBS: 4 %Eu/4 %Tb/6 %Sm with commercial n -UV LED chip, show high thermal stability with satisfactory electroluminescence (EL) performances. These results indicate the KBS: Eu/Tb/Sm phosphors are potential candidates for application in high power n -UV pumped pc- w LEDs.
研究领域:
材料科学
·
发光材料
·
固态照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Min Yang,Yujia Yan,Enzhou Liu,Qian Sun,Jun Fan
In recent years, all-inorganic perovskite has been extensively studied due to its excellent photoelectric properties, but the application of Cs n PbBr 2+ n perovskite with excellent stability in the field of chemical sensing has yet to be developed. Herein, Cs 4 PbBr 6 /CsPbBr 3 with good stability was successfully prepared by controlling the synthesis temperature to 100 ° C. The fluorescence intensity of Cs 4 PbBr 6 /CsPbBr 3 exhibited 2,4-dinitriphenylhydrazine (DNPH) concentration-dependent characteristics and could be used for sensing DNPH based on the dynamic quenching process triggered by the collision between Cs 4 PbBr 6 /CsPbBr 3 and DNPH. A good linear model was established based on the detection signal and DNPH concentration in the range of 0.05∼30 mg/L and the detection limit was 0.033 mg/L. This method was applied to detect DNPH in soil and tap water samples with satisfactory results obtained. Therefore, this research broadens the application of Cs n PbBr 2+ n in the field of quantitative detection and is expected to be developed into a fluorescent sensor for the detection of hydrazine substances.
研究领域:
分析化学
·
材料科学
·
环境监测
·
传感器技术
·
光电子学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haisheng Chen,Wenwen Chen,Jiaying Shen,Xiaona Du,Tianhong Zhou,Zhengang Dong,Taiyu Bian,Jiaxing Guo,Yiyang Wen,Yuanlin Liang,Zhenping Wu,Yang Zhang
Developing smart luminescent materials with desirable and tunable characteristics has always been an overriding priority of fluorescence technology. However, huge challenges encompass the single functionality of the luminescent materials and the traditional chemical synthetic techniques with rigorously controlling over the miscellaneous experimental conditions and variables. Herein, the lanthanide-doped bismuth-layered ferroelectric (Na 0.5 Bi 0.5 ) 0.96 Er 0.04 Bi 2 Nb 2 O 9.02 has been prepared to be utilized as a platform that not only serves the in-situ and reversible tailoring of the upconverted emission via physical methods, but also enable the versatile functionalities such as photomemory and multi-modal temperature sensing. High luminescent contrast that can reach up to 83.7 % before and after the 405 nm irradiation has been realized on the basis of the photochromic phenomenon of the as-prepared (Na 0.5 Bi 0.5 ) 0.96 Er 0.04 Bi 2 Nb 2 O 9.02 sample, and the fundamental application in the photomemory has been exhibited. Moreover, the performances of triple-mode thermometry built on the fluorescent intensity ratio techniques ( 2 H 11/2 / 4 S 3/2 and 4 S 3/2 / 4 F 9/2 ) as well as the lifetime of the 4 S 3/2 excited state of the Er 3+ ion have been investigated in carefulness, with the maximal relative sensitivities of 1.22 % K −1 at 300 K, 0.92 % K −1 at 510 K, and 0.18 % K −1 at 450 K, respectively. Our results provide significant insights into the methodology of physically modulating the upconversion luminescence, and offer a glamorous pathway for multifunctional high-end applications.
研究领域:
材料科学
·
光学工程
·
功能材料
·
纳米光子学
·
传感技术
·
固态物理
·
智能材料
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2014
·
IF 2.354
Tianxiang Yin,Miao Qin,Weiguo Shen
The interactions of Gemini surfactants 1-dodecyl- N , N ′-[(1,4-dioxo-1,4-butanediyl)bis(oxy-2,1-ethanediyl)]bis[ N , N ′-dimethylammonium]dibromide (12-su-12) and 1-dodecyl- N , N ′-[((2 E )-1,4-dioxo-2-butene-1,4-diyl)bis(oxy-2,1-ethanediyl)]bis[ N , N ′-dimethylammonium]dibromide (12-fo-12) and the corresponding single-chain surfactant 1-dodecyl- N -[2-(acetyloxy)ethyl]- N , N -dimethyl ammonium bromide (DTAAB) with bovine serum albumin (BSA) were investigated by conductometry, fluorimetry, UV–vis and CD spectrometry, and dynamic light scattering. It was found that the bindings of all three surfactants to BSA were cooperatively driven by electrostatic and hydrophobic interactions. The Gemini surfactants, carrying more charges and hydrophobic tails, showed stronger interactions with BSA than the single-chain surfactant. The presence of the double bond in the spacer of 12-fo-12 enhanced the interaction between the surfactant and BSA and also significantly varied the binding sites as compared to 12-su-12 and DTAAB, which indicated an important role of the property of the spacer in the interaction between the surfactant and BSA.
研究领域:
生物物理化学
·
分子生物学
·
药物递送
·
蛋白质科学
·
纳米医学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 125
·期 4
·2867-2873
·
IF 1.289
Yehai Yan,Na Lu,Jian Cui,Jinfang Zhang
A new fluorescent copolymer, poly(1-vinylimidazole- co -(1-pyrene) methyl 2-methyl-2-propenote) (VI- co -PyMMP), has been designed and synthesized by a free-radical copolymerization of VI and PyMMP as well as characterized using ultraviolet (UV), Fourier transform infrared spectroscopy (FTIR), 1 H NMR, and fluorescence spectroscopies. The monomer reactivity ratios are determined by two methods of Fineman-Ross ( r 1 = 0.28 ± 0.04 for VI, r 2 = 1.32 ± 0.11 for PyMMP) and Kelen-Tüdös ( r 1 = 0.23 ± 0.05, r 2 = 1.22 ± 0.12). Based on the reactivity ratios, the monomer sequence lengths and Q and e for PyMMP monomer are further calculated. The results suggest that the copolymerization of VI and PyMMP is a nonideal copolymerization without an azeotropic point (i.e., r 1 < 1, r 2 > 1 and r 1 r 2 < 1) and has a low alternation tendency. The conclusions drawn in this work may not only direct the later synthesis of the copolymers but also enrich the database of free-radical copolymerization. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
高分子化学
·
功能高分子
·
荧光材料
·
聚合物合成
·
材料化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
·
2016
·
IF 3.035
Xiaoyi Liu,Zhaoxing Ling,Xing Zhou,Farooq Ahmad,Ying Zhou
Butachlor is an effective herbicide to deal with undesired weeds selectively and is used at high levels in Asian countries. However, its interaction and impairment effect on BSA was still not clear. In this study, we investigated the interaction between butachlor and bovine serum albumin (BSA) by multi-spectroscopic methods including UV absorption , circular dichroism (CD) spectra, Fourier transform infrared (FTIR) spectra and fluorescence spectra under physiological conditions (pH = 7.4). The results revealed that there was a static quenching of BSA induced by butachlor stemmed from the formation of complex. Based on thermodynamic data, the interaction of butachlor with BSA was due to happen, and van der Waals force as well as hydrogen bond were the major forces contributed to the interaction. The binding constant K b and number of binding site of butachlor with BSA were 5.158 × 10 5 and 1.372 at 303 K, respectively. The distance r between donor (BSA) and acceptor (butachlor) was 0.113 nm, obtained according to the Förster theory. The results revealed that butachlor induced conformational changes in BSA but the secondary structure of BSA was still retained. In addition, the microenvironment around chromophore residues of BSA, for example, tryptophan , changed as well, resulting from the formation of more hydrogen bonds.
研究领域:
生物化学
·
分子药理学
·
药物代谢
·
环境毒理学
·
蛋白质科学
✓ 已验证
DOI
高影响因子
Journal of Chemistry
·
2021
·Vol. 2021
·期 1
·5685596
·
IF 2.506
Jia Ma,Jianer Wang,Yuping He,Yiwei Huang,Yejun Chen
Solvothermal reaction of 4,4’,4’-nitrilotribenzoic acid (H 3 TCA) with Ca(NO 3 ) 2 ·4H 2 O and Cd(NO 3 ) 2 ·4H 2 O successfully afforded a heterometallic compound, that is, [Cd 2 Ca(TCA) 2 (DMA) 2 (H 2 O) 3 ] n ·2n(DMA) ( 1 , DMA = N,N’-dimethylacetamide). The structure of 1 was further characterized through EA, diffraction of single crystal X-ray, and thermogravimetric analysis (TGA) together with powder X-ray diffraction (PXRD). Moreover, complex 1 ’s luminescent performance in solid state was also discussed at environmental temperature. The applications on the ischemic cerebral infarction therapy were evaluated, and the specific mechanism was investigated at the same time. Firstly, the hypersensitivity C-reactive protein (hs-CRP) content in human brain microvascular endothelial cell (HBMEC) was measured with real-time reverse transcription-polymerase chain reaction (RT-PCR). Then, interleukin-18 and interleukin-1 β content released through the HBMEC was detected with enzyme-linked immunosorbent assay (ELISA).
研究领域:
生物无机化学
·
神经药理学
·
炎症生物学
·
转化医学
·
分子影像学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2014
·Vol. 32
·期 11
·1564-1574
·
IF 1.42
Li Ming,Zhang Li-fen,Tao Mei-xia,Cheng Zhen-ping,Zhu Xiu-lin
In this work, a fluorescent monomer 2-(9-carbazolyl) ethyl vinyl ether (CEVE) was synthesized in our lab, and its photo-induced living cationic copolymerization behavior with isobutyl vinyl ether (IBVE) was investigated in detail using diphenyliodonium chloride (DPICl)/2,2-dimethoxy-2-phenylacetophenone (DMPA) and zinc bromide (ZnBr 2 ) initiating system in dichloromethane solution at 5 °C, −5 °C, and −15 °C, respectively. The living nature of this copolymerization system was confirmed by adding fresh comonomer method after the copolymerization almost finished. In addition, the obtained fluorescent copolymer poly(IBVE- co -CEVE) has a low glass transition temperature ( T
g ), below −10 °C.
研究领域:
高分子化学
·
功能高分子
·
光响应材料
·
聚合反应机理
·
荧光材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）