Materials Chemistry Frontiers
·
2025
·
IF 6.4
Qi Wang,Jian-Qiang Zhao,Peng-Yao Xuan,Xin-Yuan Li,Zhao-Xi Wang,Hao-Shuo Lu,Xiao-Wu Lei,Zhihong Jing,Cheng-Yang Yue
Zero-dimensional (0D) metal halides-based room-temperature phosphorescence (RTP) materials have received extensive attention with wide application prospects, but remains to suffer from low phosphorescence efficiency, which restricts their progress in cutting-edge photonic applications. In this work, a new zero-dimensional (0D) cadmium halide [BTPP]2CdBr4 (BTPP = benzyl triphenylphosphonium bromide) has been successfully synthesized through room-temperature solution method. Under excitation of 357 nm and 309 nm UV light, [BTPP]2CdBr4 displays dual blue fluorescence and green phosphorescence with lifetimes of 1.38 ns and 76.18 ms, respectively. The quantum yield of phosphorescence reaches up to be 43.68%, which exceeds most of the 0D metal halide-based RTP materials. Detailed experimental characterizations and theoretical calculations demonstrate that the fluorescence and phosphorescence originate from the radiative recombination of singlet self-trapped excitons (STEs) and triplet π-π* charge transfer in [BTPP]+ cation, respectively. Benefitting from the dual luminescence, [BTPP]2CdBr4 can be explored as dual space- and time-resolved luminescent label with applications in anti-counterfeiting and information security, etc. This work provides a fundamental structural engineering strategy to design highly efficient 0D metal halides-based RTP materials.
研究领域:
材料科学
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光学
·
化学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2023
·
IF 3.1
Aihua Zhou,Jiaxin Yang,Yan Li,Chengguo Ming,Yuanxue Cai,Yumiao Pei
Luminescence thermometry has recently been gaining popularity in science and technology fields. However, most reported works have used the fluorescence intensity ratio (FIR) to obtain the temperature based on thermally coupled energy levels (TCLs), which have hindered the sensitivity of the technique and limited its applications. Here, NaYF4:Yb/Tm@NaYF4:Yb/Ho microcrystals were prepared using a hydrothermal method. Based on the non-thermally coupled energy levels (NTCLs) of the double luminescent ionic centers Tm3+ and Ho3+, the materials exhibited temperature-dependent luminescence in the range of 304 K to 574 K. The maximum sensitivities were found to be Sa = 0.135 K−1 at 574 K and Sr = 1.101% K−1 at 484 K based on red (Tm3+) and green (Ho3+) emission bands. This study has provided a promising new strategy to break the TCL restriction and has shown the material to have potential applications in luminescence thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
·
2024
·Vol. 35
·期 9
·095205
·
IF 2.7
Feng Gu,Chunhua Wei,Lingrui Jiao,Yingzheng Liu,Di Peng
Motion- and temperature-induced errors are the major sources of error in pressure-sensitive paint (PSP) measurement. In this study, we developed a novel dual-luminophore fast-responding PSP with reference and pressure-sensitive channels that have similar temperature sensitivities, enabling motion- and temperature-induced errors to be simultaneously eliminated by taking the intensity ratio of the two channels. Rhodamine B (RhB), which was loaded on the Mobil Composition of Matter No. 41 (MCM-41) molecular sieve, and platinum tetrakis (pentafluorophenyl) porphyrin (PtTFPP) were chosen as the reference and pressure-sensitive luminophores, respectively. These luminophores were mixed with mesoporous SiO2 particles and a small amount of polymer to form a sprayable motion–temperature cancellation (MTC) PSP. By controlling the concentration of RhB, the temperature sensitivity of the reference channel was adjusted to match that of PtTFPP. To minimize temperature-induced errors, the effect of spectral ranges was also investigated. The lowest temperature sensitivity achieved for the MTC-PSP was 0.025%/°C, yielding an extremely low temperature-induced error of 55 Pa °C−1. Its pressure sensitivity and response time were 0.46%/kPa and 145 μs, respectively. In addition, a theoretical model for the MTC-PSP that considers the effect of spectral overlap was proposed. The model accurately predicted the nonlinear relationship between the intensity ratio and pressure. The capability of the MTC-PSP was confirmed in a fast-rotating-disk experiment, and the pressure results agreed well with the theoretical pressure distribution on the disk.
CAS / MDL:
研究领域:
物理学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-13
·
IF 5.3
Li Ruidan,Tian Li,Song Yujia,Guo Yanjia,Ma Guangping,Han Pengfei,Jiang Hanyue,Wang Wenzhuo,Lu Juan
The self-supporting material Zn3Cu2O2 was synthesized through the methods of electrospinning combined with high-temperature calcination. A novel sensitive electrochemiluminescence (ECL) sensor based on Zn3Cu2O2 and CdTe@MWNTs was constructed by the multi-step amplification strategy. First, Zn3Cu2O2 and CdTe served as the ECL groups to construct the sensor, yielding a larger signal of the sensor in the presence of the co-reactant K2S2O8. Multi-walled carbon nanotubes (MWNTs) were introduced as a carrier to increase the signal value of the sensor further. The synergistic action of CdTe@MWNTs and Zn3Cu2O2 made the system obtain the maximum initial signal. With the addition of Allure Red (AR), the ECL signal decreased. The quenching phenomenon was not only due to the large organic molecule AR occupying the active sites of Zn3Cu2O2 and CdTe, but also, more importantly, because the sensor existed as an ECL-RET mechanism between CdTe and AR. The response mechanism and experimental conditions of the system were also investigated. Under optimal conditions, the sensor showed a linear relationship between the ECL signal change and the logarithm of AR concentration in the range 1.0 × 10−14 to 1.0 × 10−6 mol L−1, the linear equation was ∆I = 15,295.54 + 956.42 log CAR, and the correlation coefficient was 0.9928. The lowest detection limit of (S/N = 3) was 1.67 × 10−15 mol L−1. Satisfactory results were obtained for the analysis of beverages.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Jia Yu,Ruipeng Chai,Yuanyuan Hu,Xue Yang,Hong Xin,Xiangyu Zhang,Dangli Gao
Persistent luminescence (PersL) materials have emerged as an outstanding optical media with versatile applications in data storage, anti-counterfeiting, and beyond. However, their practical implementation is critically hindered by insufficient PersL intensity, a challenge fundamentally rooted in the incomplete understanding of trapping mechanisms. Here, we developed Tb 3+ -activated Ga 4 GeO 8 phosphors with rational defect manipulation via Ln 3+ (Ln = Pr, Eu, Ce, Er) co-doping strategies. Especially, when Eu 3+ /Er 3+ are introduced as lattice distortion agents into Tb 3+ -doped Ga 4 GeO 8 , the phosphors demonstrate dual-band PersL including blue-green PersL from Tb 3+ 5 D 4 → 7 F J transitions (492–620 nm) and red-NIR PersL emission (715 nm) originating from oxygen defect levels. Through systematic exploration of the PersL mechanism, we propose a criterion for effective trapping: stabilizing V O •• defect energy levels by replacing matrix cations with less electronegative species (e.g., Eu 3+ , Er 3+ ), which suppresses non-radiative V O defect states. This study establishes design guidelines for the rational development of high-performance PersL materials.
研究领域:
材料科学
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光学材料
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固体物理
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无机化学
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发光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 31
·11791-11802
·
IF 4.052
Baochen Wang,Ruiyu Mi,Yangai Liu,Ming Yu,Zhaohui Huang,Minghao Fang
The luminescence spectra of some trivalent rare-earth ions in a garnet host present interesting multisite structures; however, their mechanism is still not fully understood. In this study, for the first time, we directly observed two luminescence centers of Ce3+ at a single site in a novel garnet Ca3Sc2Ge3O12 phosphor. The spectral characteristics of the two luminescence centers were clearly identified using site-selective and time-resolved spectroscopy. Luminescence excitation was observed at 425 nm and 450 nm, corresponding to emissions at 490 (Ce(I)) nm and 530 (Ce(II)) nm. The decay curves confirmed the existence of energy transfer from Ce(I) to Ce(II). The potential mechanisms of the multisite luminescence are also discussed. This study gives a new insight into the concentration-dependent red-shift and inhomogeneous broadening of the Ce3+ emission band in the garnet phosphor. The title phosphor showed excellent thermal stability, with more than 90% of the initial intensity at the functioning temperature (323 K). Finally, a white LED lamp was fabricated, which exhibited an excellent color rendering index (82.3) and a proper correlated color temperature (3582 K). These results demonstrate that Ca3Sc2Ge3O12:Ce3+ is highly promising to serve as a blue-pumped phosphor for white LEDs.
研究领域:
材料科学
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光电技术
·
光子学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Caiping Ding,Shasha Cheng,Fang Yuan,Cuiling Zhang,Yuezhong Xian
Calcium and chloride levels are closely related to lysosome dysfunction. However, the simultaneous measurement of calcium (Ca2+) and chloride (Cl–) in acidic subcellular organelles, which is conducive to a deep understanding of lysosome-related biological events, remains a challenge. In this study, we developed a pH-insensitive, ratiometric NIR nanoprobe for the simultaneous detection of Ca2+ and Cl– in acidic lysosomes and determined the roles of the two ions in lysosome function. The upconversion nanoprobe with blue, green, and red emissions was modified with a Ca2+-sensitive dye (Rhod-5N) and Cl–-responsive fluorophore (10,10′-bis[3-carboxypropyl]-9,9′-biacridinium dinitrate, BAC). As a result of a dual-luminescence resonance energy transfer between upconversion nanoparticles (UCNPs) and Rhod-5N/BAC, the blue and green upconversion luminescence (UCL) of UCNPs were quenched and the red UCL was used as the reference signal. The ratiometric upconversion nanoprobe possesses a specific ability for the concurrent recognition of Ca2+ and Cl– ions independent of the influence of the environmental pH. To locate the probe in the lysosome, dextran was further modified with upconversion nanoparticles. Then, the nanoprobe with a high spatial resolution was constructed for the simultaneous monitoring of Ca2+ and Cl– in acidic lysosomes. Moreover, it was found that the reduction of lysosomal Cl– affects the release of lysosomal Ca2+, which further blocks the activities of specific lysosomal enzymes. The ratiometric NIR nanoprobe has great potential for decoding and evaluating lysosomal diseases.
研究领域:
纳米技术
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生物医学工程
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细胞生物学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yanping Liu,Yan Zhan,Beata Szreniawa,Katarzyna Matras-Postolek,Ping Yang
Perovskite nanomaterials with highly stable and bright emission were requested for white light emitting diodes (LEDs). In this paper, superior thin CsPbBr 3 nanoplates (NPLs) with an average thickness of 1.9 nm were synthesized via solvothermal reactions. A bright blue-emitting peak at 455 nm with a photoluminescence (PL) quantum yield of 89 % was observed. The high PL efficiency was kept after storing for 90 days at ambient condition. This supplied an efficient approach to solve the problem of low PL efficiency and poor stability of blue-emitting perovskite nanocrystals . The thickness of CsPbBr 3 NPLs was adjusted by changing preparation conditions. The PL peak wavelength of CsPbBr 3 NPLs was adjusted in a region of 455–465 nm. Through dynamic anion exchange promoted cation exchange reactions, Mn ions were introduced in the lattice of CsPbBr 3 NPLs to generate bright orange emitting to create dual-luminescent CsPbBr 3 :Mn NPLs. A white emitting sample with a color coordinate of (0.304, 0.325) was finally fabricated using bright CsPbBr 3 :Mn NPLs and green-emitting CsPbBr 3 nanocrystals. This work broadened the application of perovskite for display and lighting.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhefu Wu,Qing Su,Jie Yang,Zhimei Wei,Gang Zhang
Particulate matter 2.5 (PM 2.5 ) has become a major threat to human lives. To minimize the adverse effect of high temperature PM 2.5 , the best way is to alert and filter out the PM 2.5 simultaneously. However, it remains a challenge to design filters with combined merits of high-performance, fire-retardancy and thermal response. In this work, we prepare the thermochromic luminous polysulfone membrane with high-temperature PM 2.5 filtration and alarming property. The dual luminous center containing covalent donor–acceptor (DA) structure and metal–ligand interaction are incorporated and electrospun into structure unified nanofibers. And different thermal responsiveness is observed for the dual luminous center. The high PM 2.5 filtration efficiency (99.1%), low pressure drops (98 Pa) and heat-resistant (T g > 236 °C) membrane can be directly applied on an in-situ high-temperature PM 2.5 filtration and monitoring device, with the emission color variable from red to cyan in a wide range. More importantly, PBN composite filters show excellent flame retardancy in comparison with the commercial PE fabrics, and the color indicating property functions well even under fire. Therefore, the PBN composite membrane holds great potential in the fields of high-temperature PM 2.5 filtration and fire alarming.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
消防安全工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 24
·6458-6463
·
IF 5.16
Xinyue Song,Zihong Yue,Jiayu Zhang,Yanxialei Jiang,Zonghua Wang,Shusheng Zhang
Graphical By taking advantage of a lack of spectral overlapping and single NIR excitation wavelengths, sandwich-structured multicolor upconversion nanoparticles (SWUCNPs) were used to establish a dual luminescence resonance energy transfer (LRET) nanoprobe with special recognition ligands. The quenched fluorescence would be recovered after the detachment and/or absorbance change of the attached ligands (see scheme) to investigate the interplaying roles of [Ca 2+ ] i and pH i . Intracellular [Ca 2+ ] i and pH i have a close relationship, and their abnormal levels can result in cell dysfunction and accompanying diseases. Thus, simultaneous determination of [Ca 2+ ] i and pH i can more accurately investigate complex biological processes in an integrated platform. Herein, multicolor upconversion nanoparticles (UCNPs) were prepared with the advantages of no spectral overlapping, single NIR excitation wavelengths, and greater tissue penetration depth. The upconversion nanoprobes were easily prepared by the attachment of two fluorescent dyes, Fluo-4 and SNARF-4F. Based on the dual luminescence resonance energy transfer (LRET) process, the blue and green fluorescence of the UCNPs were specially quenched and selectively recovered after the detachment and/or absorbance change of the attached fluorescent dyes, enabling dual detection. Importantly, the developed nanoprobe could successfully be applied for the detection of [Ca 2+ ] i and pH i change in adenosine triphosphate (ATP) and ethylene glycol tetraacetic acid (EGTA) stimulation in living cells.
研究领域:
生物化学
·
分子生物学
·
纳米技术
·
细胞生物学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2019
·
IF 13.903
Fenfen Zheng,Chen Wang,Tiantian Meng,Yuqian Zhang,Penghui Zhang,Qi Shen,Yuchao Zhang,Junfeng Zhang,Jianxin Li,Qianhao Min,Jiangning Chen,Jun-Jie Zhu
In vivo monitoring of cargo protein delivery is critical for understanding the pharmacological efficacies and mechanisms during cancer therapy, but it still remains a formidable challenge because of the difficulty in observing nonfluorescent proteins at high resolution and sensitivity. Here we report an outer-frame-degradable nanovehicle featuring near-infrared (NIR) dual luminescence for real-time tracking of protein delivery in vivo. Upconversion nanoparticles (UCNPs) and fluorophore-doped degradable macroporous silica (DS) with spectral overlap were coupled to form a core–shell nanostructure as a therapeutic protein nanocarrier, which was eventually enveloped with a hyaluronic acid (HA) shell to prevent protein leakage and for recognizing tumor sites. The DS layer served as both a container to accommodate the therapeutic proteins and a filter to attenuate upconversion luminescence (UCL) of the inner UCNPs. After the nanovehicles selectively accumulated at tumor sites and entered cancer cells, intracellular hyaluronidase (HAase) digested the outermost HA protective shell and initiated the outer frame degradation-induced protein release and UCL restoration of UCNPs in the intracellular environment. Significantly, the biodistribution of the nanovehicles can be traced at the 710 nm NIR fluorescence channel of DS, whereas the protein release can be monitored at the 660 nm NIR fluorescence channel of UCNPs. Real-time tracking of protein delivery and release was achieved in vitro and in vivo by NIR fluorescence imaging. Moreover, in vitro and in vivo studies manifest that the protein cytochrome c-loaded nanovehicles exhibited excellent cancer therapeutic efficacy. This nanoplatform assembled by the outer-frame-degradable nanovehicles featuring NIR dual luminescence not only advances our understanding of where, when, and how therapeutic proteins take effect in vivo but also provides a universal route for visualizing the translocation of other bioactive macromolecules in cancer treatment and intervention.
研究领域:
生物医学工程
·
癌症研究
·
纳米技术
·
药学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Di Yang,Junkai Ren,Jiwei Li,Qinglin Wang,Qiu Wang,Zheng Xie,Xiaozhong Qu
Herein we report on a biluminophore fast-responding pressure sensitive coating with a bi-layer structure prepared by a non-sensitive reference base paint and subsequently a classic polymer-ceramic pressure sensitive paint (PSP). The coating procedure is fully sprayable and allows the separation of the two luminophores in each layer to prevent their interference that may affect the pressure responsibility. The major advance is the use of sol-gel process of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) to make the bottom reference layer which ensures the spreading and affinity of the top PSP, composed of a room-temperature vulcanizing silicone rubber (RTV), so that very thin PSP layer, i.e. less than 5 μm, was achieved. Besides, silane-functionalized carbon dots (CDs) was selected as the reference probe, for it could be well-incorporated with the TEOS/MTES matrix, and gained high loading level and hence strong luminescence of the basecoat to overcome the attenuation effect of the top PSP layer. The resultant biluminophore bi-layer fast-responding PSP (denoted as Fast bi-PSP) showed two completed separated emissions with λ max at 430 and 600 nm for the incorporated CDs and the oxygen sensitive ruthenium complex dye, which enables the utility of intensity ratio from blue and red luminescence for the measurement of surface pressure by following Stern-Volmer relationship. Using a shock tube , the response time of the Fast bi-PSP coating was determined to be 0.4–0.6 ms according to the chemical composition . The ability of the coating for monitoring the dynamic evolution of full-field surface pressure was demonstrated on sample plates at attack angles of 0° and 5°. Our work suggests a facile but efficient way for the future design of self-referenced photoluminescent non-contact surface pressure sensing systems.
研究领域:
航空航天工程
·
材料科学
·
光学传感
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）