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Lanthanide complexes-functionalized ordered mesoporous TiO_2:Multicolor emission(visible and near-infrared luminescence) based on visible-light sensitization

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Journal of Rare Earths 2018年第9期36卷 939-945页

作者： Zhijuan Wang Song Dang Shu'na Zhao Lining Sun Research Center of Nano Science and Technology and School of Material Science and EngineeringShanghai University State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Saiences

Recently,much attention has been paid to the lanthanide luminescent materials based on the visiblelight sensitization for their potential applications in the fields of bio-imaging and optical devices.In this work,the lanthanide complexes have been covalently bonded to the ordered mesoporous titania（OMT） matrix,and the resulting titania-based hybrid ordered mesoporous materials（named as LnDBOMT,Ln = Eu,Sm,Yb,Nd） were characterized by using Fourier-transform infrared（FT-IR） spectroscopy,small-angle X-ray powder diffraction（SAXD）,N2 adsorption-desorption isotherms,transmission electron microscopy（TEM）,fluorescence spectroscopy,and thermogravimetric analysis.Generally,exciting with visible light is advantageous over UV excitation.Of importance here is that,under excitation with visible light,the LnDB-OMT all show characteristic visible（Eu3＋,Sm3＋） as well as nearinfrared（Sm3＋,Yb3＋,Nd3＋） luminescence of the corresponding Ln3＋ ions（multicolor emission covered from 500 to 1400 nm spectral region）,which is attributed to the energy transfer from the ligands to the Ln3＋ ions via an antenna effect.

关键词： Visible-light excitation Visible luminescence near-infrared luminescence Lanthanide complexes-functionalized Ordered mesoporous titania Rare earths

Synthesis,structure and near-infrared luminescence of a new 2D praseodymium(Ⅲ) coordination polymer

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Journal of Rare Earths 2011年第11期29卷 1100-1104页

作者：刘光祥周宏任小明 Department of Chemistry Nanjing Xiaozhuang University College of Science Nanjing University of Technology

A novel coordination polymer,[Pr2（BIPA）3（H2O）2].2H2O（1）（H2BIPA=5-bromoisophthalic acid）,was prepared by hydrothermal synthesis and characterized by IR spectroscopy,elemental analysis and single-crystal X-ray diffraction.The crystal was of monoclinic system,space group C2/c,with a=1.98037（14）,b=1.44189（14）,c=2.15281（18） nm,β=95.220（2）°,V=6.1218（9） nm3,C24H17Br3O16Pr2,Mr=1082.93,Dc= 2.350 g/cm3,F（000）=4096,μ=7.136 mm-1 and Z=8.The final R1=0.0608 and wR2=0.1371 for 5624 observed reflections（I2σ（I））.Complex 1 featured an interesting 2D layer containing {Pr2（CO2）3}n right-handed and left-handed helical chains.Furthermore,hydrogen bonds linked the adjacent 2D layers to form a 3D supramolecular framework.Moreover,the near-infrared luminescent properties of 1 were also investigated in the solid state.

关键词： Pr（Ⅲ） coordination polymer 5-bromoisophthalic acid crystal structure near-infrared luminescence rare earths

Optical properties of Nd^(3+) ions doped GdTaO_(4) for pressure and temperature sensing

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Journal of Rare Earths 2022年第6期40卷 870-877,I0001页

作者： Pengyu Zhou Qingli Zhang Fang Peng Baoquan Sun Xiuming Dou Bao Liu Dandan Han Yongzhou Xue Kun Ding School of Science Northeast Electric Power UniversityJilin 132012China Key Laboratory of Photonic Devices and Materials Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Pressure-and temperature-dependent luminescence properties of ^(3)F_(3/2)→^(4)I9/2 transition of Nd^(3+):GdTaO_(4) were studied for potential applications in optical sensing.Two isolated emission lines corresponding to^(3)F_(3/2)(R2,1)→^(4)I_(9/2)(Z5)transitions,located at 920 and 927 nm under ambient condition,are very sensitive to pressure with coefficients of-15.6 and-14.5 cm^(-1)/GPa determined in a pressure range up to about 9 GPa.The luminescence intensity ratio between the two emission lines exhibits a large dependence with temperature in a range from 80 to 620 K,the corresponding temperature sensitivity at room temperature is similar to that of Nd^(3+):YAG.These advantages,together with the other observed features of high stable position relationship under pressure and low thermal shifts for the two emission lines indicate that Nd^(3+):GdTaO_(4) is a promising candidate to be used as pressure and temperature sensors in the near-infrared spectral range.

关键词： Trivalent neodymium ion Rare-earth tantalate near-infrared luminescence Pressure sensing Temperature sensing

Specific Recognition of Breast Cancer Cells In Vitro Using near infrared-Emitting Long-Persistence Luminescent Zn_3Ga_2Ge_2O_(10):Cr^(3+)Nanoprobes

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Nano-Micro Letters 2015年第2期7卷 138-145页

作者： Jinlei Li Junpeng Shi Jiangshan Shen Huizi Man Mingxi Wang Hongwu Zhang School of Biomedical Sciences Huaqiao University and Engineering Research Center of Molecular Medicine Ministry of Education Institute of Urban Environment Chinese Academy of Science

In this paper, near-infrared emitting long-persistence luminescent Zn3Ga2Ge2O10:Cr3?(ZGG) nanoparticles with diameters of 30–100 nm and bright luminescence were prepared by a sol–gel synthesis method. After the surface amination, the nanoparticles were further bioconjugated with breast cancer-specific monoclonal antibody(anti-Ep CAM) to form ZGG-Ep CAM nanoprobes which can specifically target breast cancer cell lines(MCF7) in vitro. The results of in vitro images show that the luminescence signals from the cells treated with ZGG-Ep CAM nanoprobes are stronger than those from cells treated with ZGG-unconjugated antibody, indicating that the prepared ZGG-Ep CAM nanoprobes possessed excellent specific recognition capability. Furthermore, due to their long afterglow properties, the imaging could persist more than 1 h. Therefore, these nanoprobes could not only provide a high specificity detection method for cancer cells but also realize the long-time monitoring. Developed near-infrared emitting long-persistence luminescent nanoprobes will be expected to find new perspectives for cell therapy research and diagnosis applications.

关键词： Nanoprobes Long afterglow near-infrared luminescence Target imaging

near-infrared luminescent Nd^(3+)/Yb^(3+)-codoped metal-organic framework for ratiometric temperature sensing in physiological range

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Journal of Rare Earths 2021年第9期39卷 1024-1030页

作者： Chao Gu Yanyun Ding Xinghua Quan Mengyao Gong Jiulong Yu Dian Zhao Chunxia Li Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of ChemistryZhejiang Normal UniversityJinhua 321004China

Self-calibrating luminescent thermometry employing luminescence within the optical transparency windows provides a promising prospect for temperature measurement in the biological fields.In this work,a new Nd^(3+)/Yb^(3+)-codoped metal-organic framework Nd_(0.95)Yb_(0.05)BPTC showing threedimensional anionic network,obtained by reacting ligand[1,1’-biphenyl]-3,3’,5,5’-tetracarboxylic acid(H4BPTC)with Nd^(3+)and Yb^(3+)ions under solvothermal conditions,is reported.Upon 808 nm photoexcitation,Nd_(0.95)Yb_(0.05)BPTC simultaneously emits the characteristic near-infrared luminescence of Nd^(3+)and Yb^(3+)ions based on the efficient energy transfer from Nd^(3+)to Yb^(3+)ions.In addition,the emission intensity ratio of Yb^(3+)and Nd^(3+)shows good exponential-like response to temperature in the physiological range of 293-323 K.The feature properties of Nd_(0.95)Yb_(0.05)BPTC include near-infrared absorption and emission,favorable temperature sensitivity and accurate temperature uncertainty,as well as good chemical stability,making such system useful in biomedical applications.

关键词： Lanthanide metal-organic frameworks near-infrared luminescence Temperature sensing Energy transfer Rare earths

One-step rapid synthesis,crystal structure and 3.3 microseconds long excited-state lifetime of Pd1Ag28 nanocluster

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Nano Research 2020年第2期13卷 366-372页

作者： Xinzhang Lin Hengjiang Cong Keju Sun Xuemei Fu Wanchao Kang Xiuli Wang Shengye Jin Ren'an Wu Chao Liu Jiahui Huang Gold Catalysis Research Centre State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Environmental and Chemical Engineering Yanshan UniversityQinhuangdao 066004China College of Chemistry and Molecular Sciences Engineering Research Centre of Organosilicon Compounds&MaterialsMinistry of EducationWuhan UniversityWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Laboratory of High Resolution Mass Spectrometry Technologies Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Doping foreign atom(s)in metal nanoclusters is an effective strategy to engineer the properties and functionalities of metal nanoclusters.However,until now,to dope Pd atom into Ag nanoclusters remains a huge challenge.Here we develop a one-step rapid method to synthesize the Pd-doped Ag nanocluster with high yield.The prepared Pd1Ag28 nanocluster was characterized by mass spectroscopy,X-ray photoelectron spectroscopy,X-ray crystallography,fluorescence spectroscopy,ultraviolet-visible absorption spectroscopy and transient absorption spectroscopy.The nanocluster exhibits a perfect face-centered cubic(FCC)kernel structure with a tetrahedron-like shell.Of note,Pd1Ag28 nanocluster had an unexpectedly long excited-state lifetime of 3.3 microseconds,which is the longest excited-state lifetime for Ag-based nanoclusters S0 far.Meanwhile,the excellent near-infrared luminescence indicated the nanocluster has the potential in fluorescent bio-imaging.Besides,it was revealed that Pd1Ag28 nanocluster could be transformed into Au1Ag28 nanocluster via ion exchange reaction of AuPPhzCl with Pd1Ag28 nanocluster.This work provides an efficient synthetic protocol of alloy nanoclusters and wil contribute to study the effect of foreign atom on the properties of metal nanoclusters.

关键词： Pd1Ag28 alloy nanocluster one-step rapid synthesis crystal structure near-infrared luminescence long excited-state lifetime

A 4d-4f heterometallic coordination polymer: Synthesis, crystal structure and near-infrared luminescent properties

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Journal of Rare Earths 2012年第7期30卷 716-720页

作者：刘光祥 School of Biochemical and Environmental Engineering Nanjing Xiaozhuang University

A 4d-4f heterometallic coordination polymer, [AgNd（pydc）2].2H2O （1）（H2pydc=pyridine-3,4-dicarboxylic acid）, was synthesized under hydrothermal conditions, and fimher characterized by elemental analysis, IR, thermogravimetric analysis and single-crystal X-ray dif- fraction. Complex 1 featured a three-dimensional （3D） framework containing one-dimensional （1D） channels occupied by free water molecules, which was constructed from 1D inorganic heterometallic chains and linear pydc linkers. To our knowledge, complex 1 represented a rare example of 3D open-framework 4d-4f heterometallic coordination polymer. After removal of the water molecules fi＇om complex 1, the remaining material had high thermal stability. Moreover, the near-infrared luminescent properties of 1 were also investigated in the solid state.

关键词： Heterometallic coordination polymer pyridine-3,4-dicarboxylic acid crystal structure near-infrared luminescence rare earths

Synthesis of Silver Sulf ide Quantum Dots Via the Liquid–Liquid Interface Reaction in a Rotating Packed Bed Reactor

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Transactions of Tianjin University 2020年第4期26卷 273-282页

作者： Qing Liu Yuan Pu Zhijian Zhao Jiexin Wang Dan Wang State Key Laboratory of Organic Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China

We developed the high-gravity coupled liquid-liquid interface reaction technique on the basis of the rotating packed bed(RPB)reactor for the continuous and ultrafast synthesis of silver sulfide(Ag2S)quantum dots(QDs)with near-infrared(NIR)luminescence.The formation of Ag2S QDs occurs at the interface of microdroplets,and the average size of Ag2S QDs was 4.5 nm with a narrow size distribution.Ag2S QDs can disperse well in various organic solvents and exhibit NIR luminescence with a peak wavelength at 1270 nm under 980-nm laser excitation.The mechanism of the process intensification was revealed by both the computational fluid dynamics simulation and fluorescence imaging,and the mechanism is attributed to the small and uniform droplet formation in the RPB reactor.This study provides a novel approach for the continuous and ultrafast synthesis of NIR Ag2S QDs for potential scale-up.

关键词： Ag2S quantum dots near-infrared luminescence Rotating packed bed Liquid-liquid interface reaction Process intensification

Highly efficient,tunable,ultrabroadband NIR photoemission from Bi-doped nitridated germanate glasses toward all-band amplification in optical communication

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Chinese Optics Letters 2023年第5期21卷 63-69页

作者：陈福广陈智邱建荣张帅马志军 Research Center for Humanoid Sensing Zhejiang LabHangzhou 311121China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Chinese Medical University Hangzhou 311100China

Bismuth(Bi)-doped near-infared(NIR)glass that can cover the entire optical communication window(850,1310,and1550 nm)has become the subject of extensive research for developing photonic devices,particularly,tunable fiber lasers and ultrabroadband optical amplifiers.However,the realization of highly efficient NIR luminescence from Bi-doped glass is still full of challenges.Notably,due to the co-existence of multiple Bi NIR centers in the glass,the origin of newly generated Bi NIR emission peaks at~930 and~1520 nm is still controversial.Here,we report a new Bi-doped nitridated germanate glass with tunable ultrabroadband NIR emission(850–1700 nm)and high external quantum efficiency(EQE)of~50%.A series of studies,including spectral analysis,nuclear magnetic resonance(NMR),and others,provide powerful evidence for the mechanism of luminescence enhancement and tunability,and make reasonable inferences about the origin of the new emission bands at~930 and~1520 nm.We believe that the results discussed above would enrich our understanding about multiple Bi NIR emission behaviors and contribute to the design and fabrication of highly efficient Bi-doped ultrabroadband wavelength-tunable optical glass fiber amplifiers and lasers in the future.

关键词： bismuth germanate glass near-infrared luminescence