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Bocalon LG, Tozatti MG, Januário AH, Pauletti PM, Silva MLA, Rocha LA, Molina EF, Santos MFC, Cunha WR. Incorporation of Betulinic Acid into Silica-Based Nanoparticles for Controlled Phytochemical Release. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2120491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Lúzio G. Bocalon
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Marcos G. Tozatti
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Ana H. Januário
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Patrícia M. Pauletti
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Márcio L. A. Silva
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Lucas A. Rocha
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Eduardo F. Molina
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
| | - Mario F. C. Santos
- Department of Physics and Chemistry, Federal University of Espírito Santo – UFES, Center of Exact, Natural and Health Sciences, Alegre, Brazil
| | - Wilson R. Cunha
- Research Center in Exact and Technological Sciences, University of Franca, Franca, Brazil
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Effect of ytterbium amount on LaNbO 4:Tm 3+,Yb 3+ nanoparticles for bio-labelling applications. Adv Med Sci 2020; 65:324-331. [PMID: 32563181 DOI: 10.1016/j.advms.2020.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 01/29/2020] [Accepted: 06/01/2020] [Indexed: 11/20/2022]
Abstract
PURPOSE This work investigates how Yb3+ concentration affects the luminescent properties of LaNbO4 nanoparticles for medical imaging applications. Due to the highly transparent optical window for organic tissues in the near infrared region (650-1000 nm), upconversion fluorescence allows near infrared wavelengths to penetrate deeply into tissues, which is useful in biomedical areas such as biodetection, activated phototherapy, and screening. MATERIALS/METHOD Upconversion nanoparticles based on LaNbO4 doped with Tm3+ and Yb3+ were prepared by the one-step industrial process called Spray Pyrolysis. Samples with different Tm3+:Yb3+ molar ratios (1:4, 1:8 and 1:16) were obtained. RESULTS The X-ray powder diffractograms of all the samples displayed the typical peaks of a crystalline material (tetragonal phase). Emission bands emerged in the blue, red, and near infrared regions, and they corresponded to the Tm3+1G4 → 3H6 (475 nm), 1G4 → 3F4 (650 nm), 3F2,3 → 3H6 (690 nm), and 3H4 → 3H6 (803 nm) transitions, which indicated a two-photon absorption process. As for bio-labelling application, the results indicated that Yb3+ concentration was directly related to signal intensity. CONCLUSIONS The intensity of positive conversion emissions depends directly on Yb3+ concentration. The bio-labelling tests pointed to the potential application of these materials. The sample containing the highest amount of Yb3+ provided better results and was easier to detect than the standard sample.
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Sodium Hexametaphosphate: An Inexpensive Inorganic Polyelectrolyte “Primer” For Upconverting Nanoparticles/Mesoporous Silica Core‐Shell Synthesis. ChemistrySelect 2020. [DOI: 10.1002/slct.202000287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Sábio RM, Meneguin AB, Ribeiro TC, Silva RR, Chorilli M. New insights towards mesoporous silica nanoparticles as a technological platform for chemotherapeutic drugs delivery. Int J Pharm 2019; 564:379-409. [PMID: 31028801 DOI: 10.1016/j.ijpharm.2019.04.067] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 04/22/2019] [Accepted: 04/23/2019] [Indexed: 02/07/2023]
Abstract
Mesoporous silica nanoparticles (MSNs) displays interesting properties for biomedical applications such as high chemical stability, large surface area and tunable pores diameters and volumes, allowing the incorporation of large amounts of drugs, protecting them from deactivation and degradation processes acting as an excellent nanoplatform for drug delivery. However, the functional MSNs do not present the ability to transport the therapeutics without any leakage until reach the targeted cells causing side effects. On the other hand, the hydroxyls groups available on MSNs surface allows the conjugation of specific molecules which can binds to the overexpressed Enhanced Growth Factor Receptor (EGFR) in many tumors, representing a potential strategy for the cancer treatment. Beyond that, the targeting molecules conjugate onto mesoporous surface increase its cell internalization and act as gatekeepers blocking the mesopores controlling the drug release. In this context, multifunctional MSNs emerge as stimuli-responsive controlled drug delivery systems (CDDS) to overcome drawbacks as low internalization, premature release before to reach the region of interest, several side effects and low effectiveness of the current treatments. This review presents an overview of MSNs fabrication methods and its properties that affects drug delivery as well as stimuli-responsive CDDS for cancer treatment.
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Affiliation(s)
- Rafael M Sábio
- São Carlos Institute of Physics - University of São Paulo (USP), 13566-590 São Carlos, Brazil.
| | - Andréia B Meneguin
- São Carlos Institute of Physics - University of São Paulo (USP), 13566-590 São Carlos, Brazil
| | - Taís C Ribeiro
- School of Pharmaceutical Sciences - São Paulo State University (UNESP), 14800-903 Araraquara, Brazil
| | - Robson R Silva
- Department of Chemistry and Chemical Engineering - Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
| | - Marlus Chorilli
- School of Pharmaceutical Sciences - São Paulo State University (UNESP), 14800-903 Araraquara, Brazil.
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Luminescent Mesoporous Silica Nanohybrid Based on Drug Derivative Terbium Complex. MATERIALS 2019; 12:ma12060933. [PMID: 30901813 PMCID: PMC6471776 DOI: 10.3390/ma12060933] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 02/27/2019] [Accepted: 03/07/2019] [Indexed: 12/24/2022]
Abstract
Mesoporous silica nanoparticles prepared by organic template-driven synthesis have been successfully explored as carriers of the drug-derivate green luminescent complex of terbium (III) with the nonsteroidal anti-inflammatory drug ketoprofen. The terbium (III) complex was synthesized by reacting ketoprofen sodium salt with terbium (III) chloride, which was further adsorbed onto the surface of mesoporous nanoparticles with a mean particle size of 47 ± 4 nm and pore size of 11 nm. The incorporation of the complex into mesoporous silica nanoparticles was tracked by the decrease in the surface area and pore size of the nanoparticles, and successfully demonstrated by substantial changes in the adsorption isotherms and thermal and vibrational spectroscopy results. The cytotoxicity assay and confocal microscopy have shown that the novel luminescent nanohybrid presents high cell viability and the characteristic terbium (III) emission can be assessed through two-photon excitation, which paves the way for bioimaging applications in nanomedicine.
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Liu X, Xiong H, Yang Y, Dong J, Li X. Alkyldimethylbetaine-Assisted Development of Hollow Urchinlike CuO Microspheres and Application for High-Performance Battery Anodes. ACS OMEGA 2018; 3:13146-13153. [PMID: 31458035 PMCID: PMC6644594 DOI: 10.1021/acsomega.8b01299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 09/26/2018] [Indexed: 06/10/2023]
Abstract
A new approach to develop novel hollow urchinlike copper oxide (CuO) microspheres by the hydrothermal method was reported, and zwitterionic alkyldimethylbetaine (BS) surfactants were employed as templates in the classic copper-ammonia complex systems. Effects of numerous environmental factors on the morphology of CuO particles were studied systematically, in which the concentration and structure of BS predominantly affected the developed CuO materials. It was noticed that hollow urchinlike CuO microspheres were generally formed in the presence of BS regardless of the reaction temperature and time and the source of copper ions. Generally speaking, high concentrations of BS and BS with longer chain length strongly favored the formation of hollow urchinlike CuO microspheres. The microstructures of synthesized CuO particles were studied in detail, and the corresponding formation mechanism of hollow urchinlike CuO microspheres was also proposed based on the selective adsorption of BS on the particular crystal facets of CuO crystals. Moreover, hollow urchinlike CuO microspheres showed excellent performance in the lithium-ion batteries as anode materials with a reversible capability of 511 mA h·g-1 at 0.1 C after 40 charge-discharge cycles, which was one of the best values of CuO materials reported in this field.
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e Oliveira LS, Marçal L, Rocha LA, de Faria EH, Ciuffi KJ, Nassar EJ, Corrêa IC. Photoinitiator and anesthetic incorporation into mesoporous silica. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.12.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Braz WR, Rocha NL, de Faria EH, Silva MLAE, Ciuffi KJ, Tavares DC, Furtado RA, Rocha LA, Nassar EJ. Incorporation of anti-inflammatory agent into mesoporous silica. NANOTECHNOLOGY 2016; 27:385103. [PMID: 27533108 DOI: 10.1088/0957-4484/27/38/385103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The unique properties of macroporous, mesoporous, and microporous systems, including their ability to accommodate molecules of different sizes inside their pores and to act as drug delivery systems, have been the object of extensive studies. In this work, mesoporous silica with hexagonal structure was obtained by template synthesis via the sol-gel process. The resulting material was used as support to accommodate the anti-inflammatory agent indomethacin. The alkaline route was used to prepare the mesoporous silica; cetyltrimethylammonium bromide was employed as porogenic agent. The silica particles were functionalized with 3-aminopropyltriethoxysilane alkoxide (APTES) by the sol-gel post-synthesis method. Indomethacin was incorporated into the silica functionalized with APTES and into non-functionalized silica. The resulting systems were characterized by x-ray diffraction (XRD), specific area, infrared spectroscopy, and thermal analyses (TGA). XRD attested to formation of mesoporous silica with hexagonal structure. This structure remained after silica functionalization with APTES and incorporation of indomethacin. Typical infrared spectroscopy vibrations and organic material decomposition during TGA confirmed silica functionalization and drug incorporation. The specific surface area and pore volume of the functionalized material incorporated with indomethacin decreased as compared with the specific surface area and pore volume of the non-functionalized silica containing no drug, suggesting both the functionalizing agent and the drug were present in the silica. Cytotoxicity tests conducted on normal fibroblasts (GM0479A) cells attested that the silica matrix containing indomethacin was less toxic than the free drug.
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Affiliation(s)
- Wilson Rodrigues Braz
- Universidade de Franca, Av. Dr Armando Salles Oliveira, 201, Pq. Universitário CEP 14404-600 Franca-SP, Brazil
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Liu Y, Zhang W, Li X, Le X, Ma J. Catalysis of the hydro-dechlorination of 4-chlorophenol and the reduction of 4-nitrophenol by Pd/Fe3O4@SiO2@m-SiO2. NEW J CHEM 2015. [DOI: 10.1039/c5nj01180a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pd/Fe3O4@SiO2@m-SiO2catalyst with ultrahigh surface area is used in the catalysis of hydrodechlorination of 4-chlorophenol and reduction of 4-nitrophenol.
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Affiliation(s)
- Yansheng Liu
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wei Zhang
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xinlin Li
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xuanduong Le
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Jiantai Ma
- Gansu Provincial Engineering Laboratory for Chemical Catalysis
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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Batista JNM, de Faria EH, Calefi PS, Ciuffi KJ, Nassar EJ, Caiut JMA, Rocha LA. pH Affects Sol–Gel Formation of Core–Shell Mesoporous Silica Coatings on Polyamide. Ind Eng Chem Res 2013. [DOI: 10.1021/ie302580q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Paulo S. Calefi
- Universidade de Franca—UNIFRAN-CP 82, Franca, SP 14404-600, Brazil
| | - Katia J. Ciuffi
- Universidade de Franca—UNIFRAN-CP 82, Franca, SP 14404-600, Brazil
| | | | | | - Lucas A. Rocha
- Universidade de Franca—UNIFRAN-CP 82, Franca, SP 14404-600, Brazil
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Saltarelli M, Luz PP, Matos MG, de Faria EH, Ciuffi KJ, Calefi PS, Rocha LA, Nassar EJ. Influence of catalyses on the preparation of YVO4:Eu 3+ phosphors by the sol-gel methodology. J Fluoresc 2011; 22:899-906. [PMID: 22205247 DOI: 10.1007/s10895-011-1028-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2011] [Accepted: 12/19/2011] [Indexed: 11/24/2022]
Abstract
YVO(4):Eu(3+) phosphors have been prepared by the hydrolytic sol-gel methodology, with and without alkaline catalyst. The solid powder was obtained by reaction between yttrium III chloride and vanadium alkoxides; the europium III chloride was used as structural probe. The powder was treated at 100, 400, 600, or 800 °C for 4 h. The samples were characterized by X-ray diffraction, thermal analysis, and photoluminescence. The XRD patterns revealed YVO(4) crystalline phase formation for the sample prepared without the catalyst and heat-treated at 600 °C and for the sample prepared in the presence of ammonium as catalyst and heat-treated at 100 °C. The average nanosized crystallites were estimated by the Scherrer equation. The sample which was produced via alkaline catalysis underwent weight loss in two stages, at 100 and 400 °C, whereas the sample obtained without catalyst presented four stages of weight loss, at 150, 250, 400, and 650 °C. The excitation spectra of the samples treated at different temperatures displayed the charge transfer band (CTB) at 320 nm. PL data of all the samples revealed the characteristic transition bands arising from the (5)D(0) → (5)F(J) (J = 0, 1, 2, 3, and 4) manifolds under maximum excitation at 320, 394, and 466 nm in all cases. The (5)D(0) → (7)F(2) transition often dominates the emission spectra, indicating that the Eu(3+) ion occupies a site without inversion center. The long lifetime suggests that the matrix can be applied as phosphors. In conclusion, the sol-gel methodology is a very efficient approach for the production of phosphors at low temperature.
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