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Perala RS, Srivastava M, Singh BP, Kumar Putta VN, Acharya R, Ningthoujam RS. Altering of the Electric and Magnetic Dipole Transition Probability of Eu 3+ in YPO 4 Lattice by Codoping of K + Ion: Potential Materials for Imaging and Heating. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ramaswamy Sandeep Perala
- Department of Chemistry, GITAM University, Hyderabad, 502329, India
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Manas Srivastava
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Bheeshma Pratap Singh
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Department of Physics, GITAM University, Visakhapatnam, 530045, India
| | | | - Raghunath Acharya
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Homi Bhabha National Institute, Mumbai, 400094, India
| | - Raghumani Singh Ningthoujam
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Homi Bhabha National Institute, Mumbai, 400094, India
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2
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Gómez-Morales J, Fernández-Penas R, Romero-Castillo I, Verdugo-Escamilla C, Choquesillo-Lazarte D, D’Urso A, Prat M, Fernández-Sánchez JF. Crystallization, Luminescence and Cytocompatibility of Hexagonal Calcium Doped Terbium Phosphate Hydrate Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:322. [PMID: 33513811 PMCID: PMC7910970 DOI: 10.3390/nano11020322] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 11/26/2022]
Abstract
Luminescent lanthanide-containing biocompatible nanosystems represent promising candidates as nanoplatforms for bioimaging applications. Herein, citrate-functionalized calcium-doped terbium phosphate hydrate nanophosphors of the rhabdophane type were prepared at different synthesis times and different Ca2+/Tb3+ ratios by a bioinspired crystallization method consisting of thermal decomplexing of Ca2+/Tb3+/citrate/phosphate/carbonate solutions. Nanoparticles were characterized by XRD, TEM, SEM, HR-TEM, FTIR, Raman, Thermogravimetry, inductively coupled plasma spectroscopy, thermoanalysis, dynamic light scattering, electrophoretic mobility, and fluorescence spectroscopy. They displayed ill-defined isometric morphologies with sizes ≤50 nm, hydration number n ~ 0.9, tailored Ca2+ content (0.42-8.11 wt%), and long luminescent lifetimes (800-2600 µs). Their relative luminescence intensities in solid state are neither affected by Ca2+, citrate content, nor by maturation time for Ca2+ doping concentration in solution below 0.07 M Ca2+. Only at this doping concentration does the maturation time strongly affect this property, decreasing it. In aqueous suspensions, neither pH nor ionic strength nor temperature affect their luminescence properties. All the nanoparticles displayed high cytocompatibility on two human carcinoma cell lines and cell viability correlated positively with the amount of doping Ca2+. Thus, these nanocrystals represent promising new luminescent nanoprobes for potential biomedical applications and, if coupled with targeting and therapeutic moieties, they could be effective tools for theranostics.
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Affiliation(s)
- Jaime Gómez-Morales
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-UGR, Avda. Las Palmeras, nº 4, 18100 Granada, Spain; (R.F.-P.); (I.R.-C.); (C.V.-E.); (D.C.-L.)
| | - Raquel Fernández-Penas
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-UGR, Avda. Las Palmeras, nº 4, 18100 Granada, Spain; (R.F.-P.); (I.R.-C.); (C.V.-E.); (D.C.-L.)
| | - Ismael Romero-Castillo
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-UGR, Avda. Las Palmeras, nº 4, 18100 Granada, Spain; (R.F.-P.); (I.R.-C.); (C.V.-E.); (D.C.-L.)
| | - Cristóbal Verdugo-Escamilla
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-UGR, Avda. Las Palmeras, nº 4, 18100 Granada, Spain; (R.F.-P.); (I.R.-C.); (C.V.-E.); (D.C.-L.)
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-UGR, Avda. Las Palmeras, nº 4, 18100 Granada, Spain; (R.F.-P.); (I.R.-C.); (C.V.-E.); (D.C.-L.)
| | - Annarita D’Urso
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Via Solaroli, 17, 28100 Novara, Italy;
| | - Maria Prat
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Via Solaroli, 17, 28100 Novara, Italy;
- Centro di Biotecnologie per la Ricerca Medica Applicata (BRMA), Via Solaroli 17, 28100 Novara, Italy
- Consorzio Interuniversitario per Biotecnologie (CIB), Località Padriciano 99, 34149 Area di Ricerca, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), 28100 Novara, Italy
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3
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Ansari AA, Khan A, Alam M, Siddiqui MA, Ahmad N, Alkhedhairy AA. Optically active neodymium hydroxide surface-functionalized mesoporous silica micro-cocoons for biomedical applications. Colloids Surf B Biointerfaces 2020; 189:110877. [PMID: 32087533 DOI: 10.1016/j.colsurfb.2020.110877] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 02/13/2020] [Accepted: 02/14/2020] [Indexed: 01/24/2023]
Abstract
Neodymium hydroxide (Nd(OH)3)-surface modified mesoporous silica micro-cocoon microstructures were prepared using a facile single-step sol-gel chemical process. XRD revealed the semi-crystalline nature of the as-prepared materials. TEM and SEM micrographs exhibited highly monodisperse, non-aggregated, typical ordered mesoporous, and irregular sized cocoon-shaped micro-structures with a narrow size distribution. Optical properties, that were examined in the aqueous media, revealed a high colloidal stability and the formation of a semi-transparent colloidal solution. The colloidal solution of Nd(OH)3-surface functionalized micro-structures revealed well characteristics absorption bands of Nd3+ ions in the visible region. thus validating the successful coating of SiO2@Nd(OH)3 layer over the surface silica forming core-shell structures. Zeta potential, 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium) bromide, and neutral red uptake assays were applied in a dose-dependent manner to investigate the biocompatibility and toxic potential of the designed cocoon-shaped microstructures. Both the assays and the high zeta potential value demonstrated good cell viability even at high concentrations and hydrophilic conditions, indicating excellent biocompatibility and non-toxicity. These highly hydrophilic, optically active, mesoporous, biocompatible, and non-toxic cocoon-shaped microstructures could be potentially suitable candidates for optical bio-probes and drug delivery applications.
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Affiliation(s)
- Anees A Ansari
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Aslam Khan
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Manawwer Alam
- Department of Chemistry, King Saud University, Riyadh 11451, Saudi Arabia
| | - Maqsood A Siddiqui
- Al-Jeraisy Chair for DNA Research, Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; Zoology Department, College of Science, King Saud University, Riyadh 11451 Saudi Arabia
| | - Naushad Ahmad
- Department of Chemistry, King Saud University, Riyadh 11451, Saudi Arabia
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4
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Merci S, Saljooqi A, Shamspur T, Mostafavi A. Investigation of photocatalytic chlorpyrifos degradation by a new silica mesoporous material immobilized by WS
2
and Fe
3
O
4
nanoparticles: Application of response surface methodology. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5343] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sanaz Merci
- Department of ChemistryShahid Bahonar University of Kerman Kerman Iran
- Young Research SocietyShahid Bahonar University of Kerman Kerman Iran
| | - Asma Saljooqi
- Department of ChemistryShahid Bahonar University of Kerman Kerman Iran
- Young Research SocietyShahid Bahonar University of Kerman Kerman Iran
| | - Tayebeh Shamspur
- Department of ChemistryShahid Bahonar University of Kerman Kerman Iran
| | - Ali Mostafavi
- Department of ChemistryShahid Bahonar University of Kerman Kerman Iran
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Santra B, Kalita P, Chandra S, Mandal D, Kumar V, Narayanan RS, Dey A, Chrysochos N, Huch V, Biswas S, Ghoshal D, Sañudo EC, Sarkar B, Schulzke C, Chandrasekhar V, Jana A. Molecular enneanuclear Cu II phosphates containing planar hexanuclear and trinuclear sub-units: syntheses, structures, and magnetism. Dalton Trans 2020; 49:2527-2536. [PMID: 32022054 DOI: 10.1039/c9dt04584h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Highly symmetric enneanuclear copper(ii) phosphates [Cu9(Pz)6(μ-OH)3(μ3-OH)(ArOPO3)4(DMF)3] (PzH = pyrazole, Ar = 2,6-(CHPh2)2-4-R-C6H2; R = Me, 2MeAr; Et, 2EtAr; iPr, 2iPrAr; and Ar = 2,6-iPr2C6H3, 2Dip) comprising nine copper(ii) centers and pyrazole, hydroxide and DMF as ancillary ligands were synthesized by a reaction involving the arylphosphate monoester, 1, copper(i)chloride, pyrazole, and triethylamine in a 4 : 9 : 6 : 14 ratio. All four complexes were characterized by single crystal structural analysis. The complexes contain two distinct structural motifs within the multinuclear copper scaffold: a hexanuclear unit and a trinuclear unit. In the latter, the three Cu(ii) centres are bridged by a μ3-OH. Each pair of Cu(ii) centers in the trinuclear unit are bridged by a pyrazole ligand. The hexanuclear unit is made up of three dinuclear Cu(ii) motifs where the two Cu(ii) centres are bridged by an -OH and a pyrazole ligand. The three dinuclear units are connected to each other by phosphate ligands. The latter also aid the fusion of the trinuclear and the hexanuclear motifs. Magnetic studies reveal a strong antiferromagnetic exchange between the Cu(ii) centres of the dinuclear units in the hexanuclear part and a strong spin frustration in the trinuclear part leading to a degenerate ground state.
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Affiliation(s)
- Biswajit Santra
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India.
| | - Pankaj Kalita
- National Institute of Science Education and Research Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Shubhadeep Chandra
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany. and Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany.
| | - Debdeep Mandal
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India.
| | - Vierandra Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| | | | - Atanu Dey
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India.
| | - Nicolas Chrysochos
- Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Straße 4, D-17487 Greifswald, Germany.
| | - Volker Huch
- Krupp-Chair of General and Inorganic Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - Sourav Biswas
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata-32, India.
| | - Debajyoti Ghoshal
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata-32, India.
| | - E Carolina Sañudo
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Facultat de Química, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain. and Institut de Nanociència i Nanotecnologia, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany. and Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany.
| | - Carola Schulzke
- Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Straße 4, D-17487 Greifswald, Germany.
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India. and Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| | - Anukul Jana
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India.
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6
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Abstract
YPO4:Eu, YVO4:Eu, and YVPO4:Eu based phosphors with various Eu(III) activator contents and phosphate-vanadate ratios were synthesized by the self-propagating high-temperature synthesis method. The samples were characterized by scanning electron microscopy, nitrogen sorption, acid-base indicators and photoluminescence. The particle surface features with a finely dispersed structure comprising all the involved elements. The pore structure and the specific surface areas of the samples were different depending on the compositions of the samples. The most finely dispersed sample was YVO4:Eu samples. The specific surface areas of the YPO4:Eu samples were 10 to 15 times greater than those of vanadate samples. The phosphors samples had a slightly basic (YVO4:Eu, YVPO4:Eu) or slightly acidic (YPO4:Eu) properties of the surface with different contents of Lewis and Brönsted sites. The differences in the compositions and acid-base state resulted in the difference in the intensity and brightness of the photoluminescence (PL) of the samples. The yttrium-phosphate-vanadate phosphors of the mixed YVxP1−xO4-Eu had higher brightness and PL intensity than those samples with similar phosphate as well as vanadate phosphors.
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Santra B, Kumar V, Kalita P, Gupta V, Mandal D, Chandra A, Joshi M, Choudhury AR, Jana A, Chandrasekhar V. Molecular di- and tetra-nuclear zinc(II) phosphates with sterically hindered aryl phosphate mono esters ligands. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Lösch H, Hirsch A, Holthausen J, Peters L, Xiao B, Neumeier S, Schmidt M, Huittinen N. A Spectroscopic Investigation of Eu 3+ Incorporation in LnPO 4 ( Ln = Tb, Gd 1-xLu x, X = 0.3, 0.5, 0.7, 1) Ceramics. Front Chem 2019; 7:94. [PMID: 30854369 PMCID: PMC6395394 DOI: 10.3389/fchem.2019.00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 02/04/2019] [Indexed: 11/13/2022] Open
Abstract
We have investigated the incorporation of the luminescent Eu3+ cation in different LnPO4 (Ln = Tb, Gd1−xLux, x = 0.3, 0.5, 0.7, 1) host phases. All samples were analyzed with powder X-ray diffraction (PXRD), Raman spectroscopy, and site-selective time-resolved laser-induced luminescence spectroscopy (TRLFS) directly after synthesis and after an aging time of one year at ambient conditions. The PXRD investigations demonstrate the formation of a TbPO4 phase in an uncommon anhydrite-like crystal structure evoked by a pressure-induced preparation step (grinding). In the Gd1−xLuxPO4 solid solution series, several different crystal structures are observed depending on the composition. The TRLFS emission spectra of LuPO4, Gd0.3Lu0.7PO4, and Gd0.5Lu0.5PO4 indicate Eu3+–incorporation within a xenotime-type crystal structure. TRLFS and PXRD investigations of the Gd0.7Lu0.3PO4 composition show the presence of anhydrite, xenotime, and monazite phases, implying that xenotime no longer is the favored crystal structure due to the predominance of the substantially larger Gd3+–cation in this solid phase. Eu3+–incorporation occurs predominantly in the anhydrite-like structure with smaller contributions of Eu3+ incorporated in monazite and xenotime. The electronic levels of the Eu3+–dopant in Gd0.3Lu0.7PO4 and Gd0.5Lu0.5PO4 xenotime hosts are strongly coupled to external lattice vibrations, giving rise to high-energy peaks in the obtained excitation spectra. The coupling becomes stronger after aging to such an extent that direct excitation of Eu3+ in the xenotime structure is strongly suppressed. This phenomenon, however, is only visible for materials where Eu3+ was predominantly incorporated within the xenotime structure. Single crystals of Eu3+–doped LuPO4 show no changes upon aging despite the presence of vibronically coupled excitation peaks in the excitation spectra measured directly after synthesis. Based on this observation, we propose a lattice relaxation process occurring in the powder samples during aging, resulting in Eu3+ migration within the crystal structure and Eu3+ accumulation at grain boundaries or xenotime surface sites.
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Affiliation(s)
- Henry Lösch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany
| | - Antje Hirsch
- Institut für Kristallographie, RWTH Aachen University, Aachen, Germany
| | - Jacqueline Holthausen
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety (IEK-6), Jülich, Germany
| | - Lars Peters
- Institut für Kristallographie, RWTH Aachen University, Aachen, Germany
| | - Bin Xiao
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany
| | - Stefan Neumeier
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety (IEK-6), Jülich, Germany
| | - Moritz Schmidt
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany
| | - Nina Huittinen
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany
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Bioinspired crystallization, sensitized luminescence and cytocompatibility of citrate-functionalized Ca-substituted europium phosphate monohydrate nanophosphors. J Colloid Interface Sci 2019; 538:174-186. [PMID: 30504057 DOI: 10.1016/j.jcis.2018.11.083] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 11/16/2018] [Accepted: 11/22/2018] [Indexed: 01/31/2023]
Abstract
Biocompatible nanosystems exhibiting long-lifetime (∼millisecond) luminescence features are particularly relevant in the field of bioimaging. In this study, citrate-functionalized calcium-doped europium phosphates nanophosphors of the rhabdophane type were prepared at different synthesis times by a bioinspired crystallization route, consisting in thermal decomplexing of Ca2+/Eu3+ /citrate/phosphate/carbonate solutions. The general formula of this material is CaαEu1-α(PO4)1-α(HPO4)α·nH2O, with α ranging from 0 to 0.58 and n ∼ 1. A thorough characterization of the nanoparticles has been carried out by XRD (including data processing with Topas 6.0), HR-TEM, TEM, FTIR, TG/DTA, ICP, dynamic light scattering (DLS), electrophoretic mobility, and fluorescence spectroscopy. Based on these results a crystallization mechanism involving the filling of cationic sites with Ca2+ions associated to a concomitant adjustment of the PO4/HPO4 ratio was proposed. Upon calcium doping, the aspect ratio of the nanoparticles as well as of the crystalline domains decreased and the relative luminescence intensity (R.L.I.) could be modulated. Neither the pH nor the ionic strength, nor the temperature (from 25 to 37 °C) affected significantly the R.L.I. of particles after resuspension in water, leading to rather steady luminescence features usable in a large domain of conditions. This new class of luminescent compounds has been proved to be fully cytocompatible relative to GTL-16 human carcinoma cells and showed an improved cytocompatibility as the Ca2+ content increased when contacted with the more sensitive m17. ASC murine mesenchymal stem cells. These biocompatible nanoparticles thus appear as promising new tailorable tools for biomedical applications as luminescent nanoprobes.
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Munyemana JC, He H, Ding S, Yin J, Xi P, Xiao J. Synthesis of manganese phosphate hybrid nanoflowers by collagen-templated biomineralization. RSC Adv 2018; 8:2708-2713. [PMID: 35541456 PMCID: PMC9077438 DOI: 10.1039/c7ra12628j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/05/2018] [Indexed: 12/16/2022] Open
Abstract
Collagen provides an excellent biotemplate to modulate the morphology of manganese phosphate hybrid nanomaterials, leading to exquisite nanoflowers with branched petals.
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Affiliation(s)
- Jean Claude Munyemana
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Huixia He
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Shenglong Ding
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jie Yin
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Pinxian Xi
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jianxi Xiao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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11
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Gao Y, Yu H, Shi C, Zhao G, Bi Y, Xu B, Ding F, Sun Y, Xu Z. Synthesis and luminescent properties of uniform monodisperse LuPO 4:Eu 3+/Tb 3+ hollow microspheres. ROYAL SOCIETY OPEN SCIENCE 2017; 4:171451. [PMID: 29308268 PMCID: PMC5750035 DOI: 10.1098/rsos.171451] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 11/16/2017] [Indexed: 05/31/2023]
Abstract
Uniform monodisperse LuPO4:Eu3+/Tb3+ hollow microspheres with diameters of about 2.4 µm have been successfully synthesized by the combination of a facile homogeneous precipitation approach, an ion-exchange process and a calcination process. The possible formation mechanism for the hollow microspheres was presented. Furthermore, the luminescence properties revealed that the LuPO4:Eu3+ and LuPO4:Tb3+ phosphors show strong orange-red and green emissions under ultraviolet excitation, respectively, which endows this material with potential application in many fields, such as light display systems and optoelectronic devices. Since the synthetic process can be carried out at mild conditions, it should be straightforward to scale up the entire process for large-scale production of the LuPO4 hollow microspheres. Furthermore, this general and simple method may be of much significance in the synthesis of many other inorganic materials.
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Affiliation(s)
- Yu Gao
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - He Yu
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - Cheng Shi
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, People's Republic of China
| | - Guiyan Zhao
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, People's Republic of China
| | - Yanfeng Bi
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - Baotong Xu
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - Fu Ding
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - Yaguang Sun
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - Zhenhe Xu
- The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
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Heikham FD, Thiyam DS. Fabrication of Spherical Magneto-Luminescent Hybrid MnFe2O4@YPO4:5 Eu3+Nanoparticles for Hyperthermia Application. ChemistrySelect 2017. [DOI: 10.1002/slct.201701619] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Farida Devi Heikham
- Department of Chemistry; National Institute of Technology Manipur; Langolm Manipur-795004 India
| | - David Singh Thiyam
- Department of Chemistry; National Institute of Technology Manipur; Langolm Manipur-795004 India
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Zhang X, Wilson K, Lee AF. Heterogeneously Catalyzed Hydrothermal Processing of C 5-C 6 Sugars. Chem Rev 2016; 116:12328-12368. [PMID: 27680093 DOI: 10.1021/acs.chemrev.6b00311] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Biomass has been long exploited as an anthropogenic energy source; however, the 21st century challenges of energy security and climate change are driving resurgence in its utilization both as a renewable alternative to fossil fuels and as a sustainable carbon feedstock for chemicals production. Deconstruction of cellulose and hemicellulose carbohydrate polymers into their constituent C5 and C6 sugars, and subsequent heterogeneously catalyzed transformations, offer the promise of unlocking diverse oxygenates such as furfural, 5-hydroxymethylfurfural, xylitol, sorbitol, mannitol, and gluconic acid as biorefinery platform chemicals. Here, we review recent advances in the design and development of catalysts and processes for C5-C6 sugar reforming into chemical intermediates and products, and highlight the challenges of aqueous phase operation and catalyst evaluation, in addition to process considerations such as solvent and reactor selection.
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Affiliation(s)
- Xingguang Zhang
- European Bioenergy Research Institute, Aston University , Birmingham B4 7ET, United Kingdom
| | - Karen Wilson
- European Bioenergy Research Institute, Aston University , Birmingham B4 7ET, United Kingdom
| | - Adam F Lee
- European Bioenergy Research Institute, Aston University , Birmingham B4 7ET, United Kingdom
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Barick KC, Sharma A, Shetake NG, Ningthoujam RS, Vatsa RK, Babu PD, Pandey BN, Hassan PA. Covalent bridging of surface functionalized Fe3O4 and YPO4:Eu nanostructures for simultaneous imaging and therapy. Dalton Trans 2016. [PMID: 26215789 DOI: 10.1039/c5dt01522g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Magnetic luminescent hybrid nanostructures (MLHN) have received a great deal of attention due to their potential biomedical applications such as thermal therapy, magnetic resonance imaging, drug delivery and intracellular imaging. We report the development of bifunctional Fe3O4 decorated YPO4:Eu hybrid nanostructures by covalent bridging of carboxyl PEGylated Fe3O4 and amine functionalized YPO4:Eu particles. The surface functionalization of individual nanoparticulates as well as their successful conjugation was evident from Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), zeta-potential and transmission electron microscopy (TEM) studies. X-ray diffraction (XRD) analysis reveals the formation of highly crystalline hybrid nanostructures. TEM micrographs clearly show the binding/anchoring of 10 nm Fe3O4 nanoparticles onto the surface of 100-150 nm rice grain shaped YPO4:Eu nanostructures. These MLHN show good colloidal stability, magnetic field responsivity and self-heating capacity under an external AC magnetic field. The induction heating studies confirmed localized heating of MLHN under an AC magnetic field with a high specific absorption rate. Photoluminescence spectroscopy and fluorescence microscopy results show optical imaging capability of MLHN. Furthermore, successful internalization of these MLHN in the cells and their cellular imaging ability are confirmed from confocal microscopy imaging. Specifically, the hybrid nanostructure provides an excellent platform to integrate luminescent and magnetic materials into one single entity that can be used as a potential tool for hyperthermia treatment of cancer and cellular imaging.
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Affiliation(s)
- K C Barick
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
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Dong W, Zhang X, Shi H, Wang N, Zhang W, Li L, Xue Q. Preparation and luminescence properties of color-tunable single-phased LaPO4:Eu3+/Tb3+ phosphors. Chem Res Chin Univ 2016. [DOI: 10.1007/s40242-016-5407-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Xiong H, Dong J, Yang J, Liu Y, Song H, Gan S. Facile hydrothermal synthesis and multicolor-tunable luminescence of YPO4:Ln3+ (Ln = Eu, Tb). RSC Adv 2016. [DOI: 10.1039/c6ra22913a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
This work investigates a novel facile hydrothermal conversion method for the synthesis of uniform cuboid YPO4 and obtains multicolor emissions in YPO4:Tb3+, Eu3+ samples, and the energy transfer efficiency reachs about 94.30%.
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Affiliation(s)
- Hailong Xiong
- College of Chemistry
- Jilin University
- Changchun 130026
- PR China
| | - Jianchao Dong
- College of Chemistry
- Jilin University
- Changchun 130026
- PR China
| | - Junfeng Yang
- College of Chemistry
- Jilin University
- Changchun 130026
- PR China
| | - Yali Liu
- College of Chemistry
- Jilin University
- Changchun 130026
- PR China
| | - Hongbo Song
- College of Chemistry
- Jilin University
- Changchun 130026
- PR China
| | - Shucai Gan
- College of Chemistry
- Jilin University
- Changchun 130026
- PR China
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Novel ionic liquid-assisted hydrothermal method for the assembly of luminescent lanthanide fluorides with controllable morphologies. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.10.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dar AA, Sen S, Gupta SK, Patwari GN, Murugavel R. Octanuclear zinc phosphates with hitherto unknown cluster architectures: ancillary ligand and solvent assisted structural transformations thereof. Inorg Chem 2015; 54:9458-69. [PMID: 26365528 DOI: 10.1021/acs.inorgchem.5b01308] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Structural variations in zinc phosphate cluster chemistry have been achieved through a careful selection of phosphate ligand, ancillary ligand, and solvent medium. The use of 4-haloaryl phosphates (X-dippH2) as phosphate source in conjunction with 2-hydroxypyridine (hpy) ancillary ligand in acetonitrile solvent resulted in the isolation of the first examples of octameric zinc phosphates [Zn8(X-dipp)8(hpy)4(CH3CN)2(H2O)2]·4H2O (X = Cl 2, Br 3) and not the expected tetranuclear D4R cubane clusters. Use of 2,3-dihydroxypyridine (dhpy) as ancillary ligand, under otherwise similar reaction conditions with the same set of phosphate ligands and solvent, resulted in isolation of another type of octanuclear zinc phosphate clusters {[(Zn8(X-dipp)4(X-dippH)4(dhpyH)4(dhpyH2)2(H2O)2]·2solvent} (X = Cl, solvent = MeCN 4; Br, solvent = H2O 5), as the only isolated products. X-ray crystal diffraction studies reveal that 2 and 3 are octanuclear clusters that are essentially formed by edge fusion of two D4R zinc phosphates. Although 4 and 5 are also octanuclear clusters, they exhibit a completely different cluster architecture and have been presumably formed by the ability of 2,3-dihydroxypyridine to bridge zinc centers in addition to the X-dipp ligands. Dissolution of both types of octanuclear clusters in DMSO followed by crystallization yields D4R cubanes [Zn(X-dipp)(DMSO)]4 (X = Cl 6, Br 7), in which the ancillary ligands such as hpy, H2O, and CH3CN originally present on the zinc centers of 2-5 have been replaced by DMSO. DFT calculations carried out to understand the preference of Zn8 versus Zn4 clusters in different solvent media reveal that use of CH3CN as solvent favors the formation of fused cubanes of the type 2 and 3, whereas use of DMSO as the solvent medium promotes the formation of D4R structures of the type 6 and 7. The calculations also reveal that the vacant exocluster coordination sites on the zinc centers at the bridgehead positions prefer coordination by water to hpy or CH3CN. Interestingly, the initially inaccessible D4R cubanes [Zn(X-dipp)(hpy)]4·2MeCN (X = Cl 8, Br 9) could be isolated as the sole products from the corresponding DMSO-decorated cubanes 6 and 7 by combining them with hpy in CH3CN.
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Affiliation(s)
- Aijaz A Dar
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai-400076, India
| | - Saumik Sen
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai-400076, India
| | - Sandeep K Gupta
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai-400076, India
| | - G Naresh Patwari
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai-400076, India
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai-400076, India
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Dar AA, Sharma SK, Murugavel R. Is single-4-ring the most basic but elusive secondary building unit that transforms to larger structures in zinc phosphate chemistry? Inorg Chem 2015; 54:4882-94. [PMID: 25938637 DOI: 10.1021/acs.inorgchem.5b00495] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Haloaryl phosphates (X-dippH2, X = Cl, Br, I) react with zinc acetate in the presence of collidine or 2-aminopyridine (2-apy) to yield zinc phosphate clusters [Zn(X-dipp)(collidine)]4 (X = Cl (1), Br (2), I (3)) and [Zn(X-dipp)(2-apy)]4·2MeOH (X = Cl (4), Br (5), I (6)), respectively. Single-crystal X-ray diffraction studies reveal that collidine and 2-apy capped zinc phosphates 1-6 exist as discrete tetrameric zinc phosphate molecules, exhibiting a cubane-shaped D4R core. In contrast, when the same reaction has been carried out in the presence of 4-cyanopyridine (4-CNpy), polymeric zinc phosphates {[Zn4(X-dipp)4(4-CNpy)2(MeOH)2]·2H2O}n (X = Cl (7), Br (8), I (9)) have been isolated. Compounds 7-9 are square-wave-shaped, one-dimensional polymers composed of fused S4R repeating units. The common structural motif found both in D4R cubanes 1-6 and polymers 7-9 is the S4R building block, which presumably undergoes further fusion because of the coordinative unsaturation at zinc and the simultaneous presence of free P═O. The closed shell cubanes 1-6 are obviously formed by a face-to-face dimerization involving two S4R units in which the two P═O groups are in cis-configuration. On the other hand, the one-dimensional (1-D) square-wave polymers 7-9 are formed from a face-to-face association of S4R building units in which the two P═O groups are in a trans-configuration. In order to stabilize these elusive S4R zinc phosphates, the reaction between Cl-dippH2 and zinc acetate was carried out in the presence of excess imidazole as an ancillary ligand (1:1:4), although only an imidazole decorated cubane cluster [Zn(Cl-dipp)(imz)]4.2MeOH (10) was isolated. The chelating N,N'-donor 1,10-phenanthroline ligand was used to eventually isolate cyclic S4R phosphate [Zn(μ2-Cl-dipp)(1,10-phen)(OH2)]2·MeOH·H2O (11). The change of Zn(2+) source to zinc nitrate and the phosphate source to 2,6-dimethylphenyl phosphate (dmppH2) led to the isolation of another polymeric phosphate [Zn(dmpp)(MeOH)]n (12), with a zigzag backbone, formed through an edge-to-edge to polymerization of S4R building units with P═O groups in trans-configuration. The isolation of four different structural types of zinc phosphates A-D in the present study can be rationalized in terms of fusion of S4R rings in a variety of ways to either produce discrete clusters or 1-D polymers.
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Affiliation(s)
- Aijaz A Dar
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India
| | - Sunil K Sharma
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India
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Soft templating strategies for the synthesis of mesoporous materials: inorganic, organic-inorganic hybrid and purely organic solids. Adv Colloid Interface Sci 2013; 189-190:21-41. [PMID: 23337774 DOI: 10.1016/j.cis.2012.12.002] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 12/05/2012] [Accepted: 12/20/2012] [Indexed: 11/21/2022]
Abstract
With the discovery of MCM-41 by Mobil researchers in 1992 the journey of the research on mesoporous materials started and in the 21st century this area of scientific investigation have extended into numerous branches, many of which contribute significantly in emerging areas like catalysis, energy, environment and biomedical research. As a consequence thousands of publications came out in large varieties of national and international journals. In this review, we have tried to summarize the published works on various synthetic pathways and formation mechanisms of different mesoporous materials viz. inorganic, organic-inorganic hybrid and purely organic solids via soft templating pathways. Generation of nanoscale porosity in a solid material usually requires participation of organic template (more specifically surfactants and their supramolecular assemblies) called structure-directing agent (SDA) in the bottom-up chemical reaction process. Different techniques employed for the syntheses of inorganic mesoporous solids, like silicas, metal doped silicas, transition and non-transition metal oxides, mixed oxides, metallophosphates, organic-inorganic hybrids as well as purely organic mesoporous materials like carbons, polymers etc. using surfactants are depicted schematically and elaborately in this paper. Moreover, some of the frontline applications of these mesoporous solids, which are directly related to their functionality, composition and surface properties are discussed at the appropriate places.
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Du C, Lang F, Su Y, Liu Z. Low temperature nanocasting synthesis of lanthanide ions (Ln = Tb, Eu, Dy) doped CaWO4 mesoporous structure with efficiently luminescent properties. J Colloid Interface Sci 2013; 394:94-9. [DOI: 10.1016/j.jcis.2012.11.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2012] [Revised: 11/05/2012] [Accepted: 11/06/2012] [Indexed: 10/27/2022]
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23
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Lin R, Ding Y. A Review on the Synthesis and Applications of Mesostructured Transition Metal Phosphates. MATERIALS (BASEL, SWITZERLAND) 2013; 6:217-243. [PMID: 28809304 PMCID: PMC5452118 DOI: 10.3390/ma6010217] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 12/20/2012] [Accepted: 12/20/2012] [Indexed: 11/17/2022]
Abstract
Considerable efforts have been devoted to extending the range of the elemental composition of mesoporous materials since the pioneering work of the M41S family of ordered mesoporous silica by Mobil researchers. The synthesis of transition metal-containing mesostructured materials with large surface area and high porosity has drawn great attention for its potential applications in acid and redox catalysis, photocatalysis, proton conducting devices, environmental restoration and so on. Thus, various transition metals-containing mesoporous materials, including transition metal-substituted mesoporous silicates, mesostructured transition metal oxides and transition metal phosphates (TMP), have been documented in the literature. Among these, mesostructured TMP materials are less studied, but possess some unique features, partly because of the easy and facile functionalization of PO₄ and/or P-OH groups, rendering them interesting functional materials. This review first introduced the general synthesis strategies for manufacturing mesostructured TMP materials, as well as advantages and disadvantages of the respective method; then, we surveyed the ongoing developments of fabrication and application of the TMP materials in three groups on the basis of their components and application fields. Future perspectives on existing problems related to the present synthesis routes and further modifying of the functional groups for the purpose of tailoring special physical-chemical properties to meet wide application requirements were also provided in the last part.
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Affiliation(s)
- Ronghe Lin
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Yunjie Ding
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
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Bian S, Gao K, Shen H, Jiang X, Long Y, Chen Y. Organic/inorganic hybrid mesoporous silica membrane rapidly synthesized by a microwave-assisted method and its application in enzyme adsorption and electrocatalysis. J Mater Chem B 2013; 1:3267-3276. [DOI: 10.1039/c3tb20169d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Prasad AI, Parchur AK, Juluri RR, Jadhav N, Pandey BN, Ningthoujam RS, Vatsa RK. Bi-functional properties of Fe3O4@YPO4:Eu hybrid nanoparticles: hyperthermia application. Dalton Trans 2013; 42:4885-96. [DOI: 10.1039/c2dt32508j] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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26
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Qu X, Pan G, Yang HK, Chen Y, Chung JW, Moon BK, Choi BC, Jeong JH, Jang K. Low-temperature synthesis of luminescent and mesoporous β-NaYF4 microspheres via polyol-mediated solvothermal route. RSC Adv 2013. [DOI: 10.1039/c3ra23028g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Nano-preparation promoting effectively luminescent properties of one-dimensional rare earth oxides. J RARE EARTH 2012. [DOI: 10.1016/s1002-0721(12)60186-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Di W, Li J, Shirahata N, Sakka Y, Willinger MG, Pinna N. Photoluminescence, cytotoxicity and in vitro imaging of hexagonal terbium phosphate nanoparticles doped with europium. NANOSCALE 2011; 3:1263-1269. [PMID: 21135975 DOI: 10.1039/c0nr00673d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Luminescent TbPO4 nanoparticles were synthesized via a citric-acid-mediated hydrothermal route. Eu3+ doping of TbPO4 enables an efficient Tb3+-to-Eu3+ energy transfer, leading to a four-fold increase of the absolute emission quantum yield (QY), compared to that of undoped TbPO4. To check the potential of biological use, we conducted in vitro biological experiments on human cervical carcinoma HeLa cells incubated with TbPO4:Eu nanoparticles. TbPO4:Eu nanoparticles can be successfully internalized into the cells, and they show bright intracellular luminescence and very low cytotoxicity. Photoluminescence intensity dependence upon time demonstrates that Eu3+-doped TbPO4 nanoparticles are highly resistant to photobleaching. Our present work represents a demonstration of the use of rare-earth-based nanocrystals as a biological labeling agent because they combine several advantages including high emission quantum yield, long luminescence lifetime, low cytotoxicity and high photostability.
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Affiliation(s)
- Weihua Di
- World Premier International Research (WPI) Center Initiative on Materials Nanoarchitronics (MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
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Di W, Ren X, Zhang L, Liu C, Lu S. A facile template-free route to fabricate highly luminescent mesoporous gadolinium oxides. CrystEngComm 2011. [DOI: 10.1039/c1ce05435j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Di W, Shirahata N, Zeng H, Sakka Y. Fluorescent sensing of colloidal CePO4:Tb nanorods for rapid, ultrasensitive and selective detection of vitamin C. NANOTECHNOLOGY 2010; 21:365501. [PMID: 20699487 DOI: 10.1088/0957-4484/21/36/365501] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Vitamin C is an essential biological molecule for living organisms. The detection of vitamin C is always required due to its wide use in chemical, biological and pharmaceutical engineering. Here, we established a novel sensing system for rapid, ultrasensitive and highly selective detection of vitamin C based on a 'turn-on' fluorescent method. The turn-on fluorescent sensing system was built up of a colloidal CePO(4):Tb nanocrystalline solution with its fluorescence quenched by KMnO(4). The addition of vitamin C leads to a linear increase of fluorescence. The sensing principle of nanocrystalline CePO(4):Tb is based on a redox reaction via simply modulating the surface chemistry of nanocrystals. Our present sensing system for vitamin C exhibits a rapid response rate of less than 2 min, and highly selective and ultrasensitive detection with a detection limit of 108 nM, which is two orders of magnitude lower than that acquired by previously reported methods. The repeated reversibility of fluorescence quenching/recovery with time revealed a high reproducibility and long-term stability of our sensing materials. Furthermore, our developed sensing material overcomes the disadvantages such as complex surface modification/immobilization and serious biotoxicity compared to quantum-dot-based fluorescent sensing systems.
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Affiliation(s)
- Weihua Di
- World Premier International Research (WPI) Center Initiative on Materials Nanoarchitronics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan.
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Lu S, Zhang J, Zhang J, Zhao H, Luo Y, Ren X. Remarkably enhanced photoluminescence of hexagonal GdPO4.nH2O:Eu with decreasing size. NANOTECHNOLOGY 2010; 21:365709. [PMID: 20705974 DOI: 10.1088/0957-4484/21/36/365709] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The hexagonal rhabdophane-type GdPO(4) hydrate (GdPO(4).nH(2)O) was synthesized via a simple hydrothermal process. The size and morphology of the products can be tunable by adjusting the pH of reaction systems through the addition of aqueous NaOH. The nanorods with a width of 50-100 nm and a length of about 1 microm were obtained in the absence of NaOH (pH = 2), while a significant reduction of size (width: approximately 10 nm, length: approximately 50 nm) was observed for the product synthesized in the presence of NaOH (pH = 10). Surprisingly, the small-sized product exhibits a remarkably enhanced photoluminescence quantum yield and long excited state lifetime in comparison with those of the large-sized product. This abnormal luminescence phenomenon is discussed and explained. The EDS and XPS measurements revealed the presence of Na(+) in the small-sized samples. These Na(+) cations were probably bonded to the surface O(2-) dangling bonds, which thus reduces the number of surface defects that usually serve as the nonradiative energy transfer center channels. A considerable reduction of surface defect centers results in the increase of the emission efficiency and excited state lifetime in a small-sized sample. Obviously, the controlled synthesis of rare-earth-doped nanoparticles with a small size, but with relatively strong luminescence, is significant for their applications in the areas of technologies including optoelectronics, sensing and bioimaging.
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Affiliation(s)
- Shaozhe Lu
- Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, People's Republic of China.
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Nuñez NO, Liviano SR, Ocaña M. Citrate mediated synthesis of uniform monazite LnPO4 (Ln=La, Ce) and Ln:LaPO4 (Ln=Eu, Ce, Ce+Tb) spheres and their photoluminescence. J Colloid Interface Sci 2010; 349:484-91. [DOI: 10.1016/j.jcis.2010.05.079] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 05/20/2010] [Accepted: 05/24/2010] [Indexed: 11/29/2022]
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Synthesis of lathanum or La-B doped KIT-6 mesoporous materials and their application in the catalytic oxidation of styrene. J RARE EARTH 2010. [DOI: 10.1016/s1002-0721(09)60105-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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35
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Di W, Wang X, Ren X. Nanocrystalline CePO(4):Tb as a novel oxygen sensing material on the basis of its redox responsive reversible luminescence. NANOTECHNOLOGY 2010; 21:75709. [PMID: 20090200 DOI: 10.1088/0957-4484/21/7/075709] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This work reports for the first time on a new finding of luminescent CePO(4):Tb nanocrystals providing a novel oxygen sensing material on the basis of the redox responsive reversible luminescence in an oxidizing/reducing atmosphere. The origin of the luminescence quenching/recovery of nanocrystalline CePO(4):Tb was clearly demonstrated, from the surface chemistry of nanocrystals and the fluorescence decay dynamics of Tb(III). Our present work represents a preliminary demonstration of the feasibility of using nanocrystalline CePO(4):Tb as a novel oxygen sensing material since it yields several advantages including surfactant-free synthesis, dual detection functioning, rapid response, high sensitivity and good reproducibility.
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Affiliation(s)
- Weihua Di
- Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People's Republic of China.
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