1
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Factors affecting mixed-mode retention properties of cation-exchange stationary phases. J Chromatogr A 2023; 1695:463934. [PMID: 36972662 DOI: 10.1016/j.chroma.2023.463934] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/07/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023]
Abstract
Cation-exchange stationary phases were characterized in different chromatographic modes (HILIC, RPLC, IC) and applied to the separation of non-charged hydrophobic and hydrophilic analytes. The set of columns under investigation included both commercially available cation-exchangers and self-prepared PS/DVB-based columns, the latter consisting of adjustable amounts of carboxylic and sulfonic acid functional groups. The influence of cation-exchange site and polymer substrate on the multimodal properties of cation-exchangers was identified using selectivity parameters, polymer imaging and excess adsorption isotherms. Introducing weakly acidic cation-exchange functional groups to the unmodified PS/DVB-substrate effectively reduced hydrophobic interactions, whilst a low degree of sulfonation (0.09 to 0.27% w/w sulphur) mainly influenced electrostatic interactions. Silica substrate was found to be another important factor for inducing hydrophilic interactions. The presented results demonstrate that cation-exchange resins are suitable for mixed-mode applications and offer versatile selectivity.
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2
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Kim J, Lee H, Cho EB, Bae B. Fenton Stability of Mesoporous Ceria-Silica and Its Role in Enhanced Durability of Poly(arylene ether sulfone) Multiblock Copolymer Composite Membranes for Perfluorosulfonic Acid Alternatives. ACS OMEGA 2021; 6:25551-25561. [PMID: 34632212 PMCID: PMC8495844 DOI: 10.1021/acsomega.1c03615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Indexed: 06/13/2023]
Abstract
To increase the stability of cerium scavengers, we doped cerium oxide on mesoporous silica powders for the application of an oxidative stabilizer. The oxidation-reduction reaction involving hydroxyl radicals (•OH) is investigated with Fenton's test using eight types of Ce(IV)-mobile compositions of matter 41 (MCM-41) and Ce(III)-MCM-41 powder samples. As confirmed by X-ray photoelectron spectroscopy, the relative amount of Ce3+ inside the mesoporous samples decreases with the increasing time of treatment using the Fenton solution, whereas that of Ce4+ increases. 29Si CP-MAS NMR shows that the condensation of the siloxane bond varies according to the treating time up to 120 h. The mesoporous structure is also analyzed using synchrotron small-angle X-ray scattering and nitrogen adsorption. Further treatment with propane sulfonic acid ensured that the ionic conductivity of the sulfonated mesoporous silica did not decrease. The surface-modified mesoporous silica was incorporated in sulfonated poly(arylene ether sulfone) multiblock membranes. The sulfonated mesoporous silica could overcome the drawbacks of transition metal scavengers, such as a drop in ionic conductivity. Through experiments, we determined that the Ce-doped sulfonated mesoporous silica/sulfonated poly(arylene ether sulfone) composite membranes exhibit high oxidation stability when exposed to hydrogen peroxide and even higher proton conductivity than Nafion at a relative humidity over 60%.
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Affiliation(s)
- Joonseok Kim
- Department
of Fine Chemistry, Seoul National University
of Science and Technology, Seoul 01811, Republic of Korea
| | - Hyejin Lee
- Fuel
Cell Laboratory, Korea Institute of Energy
Research, Daejeon 34129, Republic of Korea
| | - Eun-Bum Cho
- Department
of Fine Chemistry, Seoul National University
of Science and Technology, Seoul 01811, Republic of Korea
| | - Byungchan Bae
- Fuel
Cell Laboratory, Korea Institute of Energy
Research, Daejeon 34129, Republic of Korea
- Department
of Renewable Energy Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
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3
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Pal N, Lee JH, Cho EB. Recent Trends in Morphology-Controlled Synthesis and Application of Mesoporous Silica Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2122. [PMID: 33113856 PMCID: PMC7692592 DOI: 10.3390/nano10112122] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/19/2020] [Accepted: 10/21/2020] [Indexed: 01/12/2023]
Abstract
The outstanding journey towards the investigation of mesoporous materials commences with the discovery of high surface area porous silica materials, named MCM-41 (Mobil Composition of Matter-41) according to the inventors' name Mobile scientists in the United States. Based on a self-assembled supramolecular templating mechanism, the synthesis of mesoporous silica has extended to wide varieties of silica categories along with versatile applications of all these types in many fields. These silica families have some extraordinary structural features, like highly tunable nanoscale sized pore diameter, good Brunauer-Emmett-Teller (BET) surface areas, good flexibility to accommodate different organic and inorganic functional groups, metals etc., onto their surface. As a consequence, thousands of scientists and researchers throughout the world have reported numerous silica materials in the form of published articles, communication, reviews, etc. Beside this, attention is also given to the morphology-oriented synthesis of silica nanoparticles and their significant effects on the emerging fields of study like catalysis, energy applications, sensing, environmental, and biomedical research. This review highlights a consolidated overview of those morphology-based mesoporous silica particles, emphasizing their syntheses and potential role in many promising fields of research.
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Affiliation(s)
- Nabanita Pal
- Department of Physics and Chemistry, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad 500075, India;
| | - Jun-Hyeok Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Korea;
| | - Eun-Bum Cho
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Korea;
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4
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Yuan D, Ellis CM, Davis JJ. Mesoporous Silica Nanoparticles in Bioimaging. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3795. [PMID: 32867401 PMCID: PMC7504327 DOI: 10.3390/ma13173795] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 02/07/2023]
Abstract
A biomedical contrast agent serves to enhance the visualisation of a specific (potentially targeted) physiological region. In recent years, mesoporous silica nanoparticles (MSNs) have developed as a flexible imaging platform of tuneable size/morphology, abundant surface chemistry, biocompatibility and otherwise useful physiochemical properties. This review discusses MSN structural types and synthetic strategies, as well as methods for surface functionalisation. Recent applications in biomedical imaging are then discussed, with a specific emphasis on magnetic resonance and optical modes together with utility in multimodal imaging.
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Affiliation(s)
| | | | - Jason J. Davis
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK; (D.Y.); (C.M.E.)
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5
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Fidecka K, Giacoboni J, Picconi P, Vago R, Licandro E. Quantification of amino groups on halloysite surfaces using the Fmoc-method. RSC Adv 2020; 10:13944-13948. [PMID: 35498455 PMCID: PMC9051629 DOI: 10.1039/d0ra01994a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/24/2020] [Indexed: 12/23/2022] Open
Abstract
The functionalization of halloysite nanotube (HNT) surfaces with aminosilanes is an important strategy for their further decoration with organic molecules to obtain hybrid inorganic–organic nanoarchitectures to be used in catalysis and drug delivery. The exact quantification of amino groups on the surface is an important aspect in view of the obtainment of systems with a known number of loaded molecules. In the present study, we describe a simple and reliable method for the correct quantification of groups present on HNT surfaces after their reaction with aminopropyltriethoxysilane (APTES). This method, applied for the first time to HNT chemistry, was based on the use of Fmoc groups as probes covalently bound to APTES and quantified by UV-Vis after release from the HNT–APTES–Fmoc system. Interestingly, this method showed great accordance with the already employed quantitative thermogravimetric analysis (TGA), with some benefits such as simple and non-destructive procedure, besides the possibility to monitor the deprotection reaction. The functionalization of halloysite nanotube (HNT) surfaces with aminosilanes is an important strategy for their further decoration with organic molecules to obtain hybrid inorganic–organic nanoarchitectures to be used in catalysis and drug delivery.![]()
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Affiliation(s)
- Katarzyna Fidecka
- Dipartimento di Chimica, University of Milan Via Golgi 19 20133 Milan Italy +39250314139
| | - Jessica Giacoboni
- Dipartimento di Chimica, University of Milan Via Golgi 19 20133 Milan Italy +39250314139
| | - Pietro Picconi
- Dipartimento di Chimica, University of Milan Via Golgi 19 20133 Milan Italy +39250314139
| | - Riccardo Vago
- I.R.C.C.S. Ospedale San Raffaele Via Olgettina 60 20132 Milan Italy
| | - Emanuela Licandro
- Dipartimento di Chimica, University of Milan Via Golgi 19 20133 Milan Italy +39250314139
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6
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Zhang L, Yang XQ, Wei JS, Li X, Wang H, Zhao YD. Intelligent gold nanostars for in vivo CT imaging and catalase-enhanced synergistic photodynamic & photothermal tumor therapy. Theranostics 2019; 9:5424-5442. [PMID: 31534494 PMCID: PMC6735389 DOI: 10.7150/thno.33015] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 07/06/2019] [Indexed: 12/23/2022] Open
Abstract
Photodynamic therapy (PDT) is a clinically approved and minimally invasive form of cancer treatment. However, due to hypoxia at the tumor site and phototoxicity to normal tissues, monotherapies using photosensitizers remain suboptimal. This study aimed to develop a highly selective controlled catalase-enhanced synergistic photodynamic and photothermal cancer therapy based on gold nanostars. Methods: Gold nanostars (GNS) with high thermal conversion efficiency were used as the core for photothermal therapy (PTT) and the shell consisted of the photosensitizer Ce6-loaded mesoporous silicon. The shell was modified with catalase (E), which catalyzes the conversion of hydrogen peroxide to oxygen at the tumor site, alleviating hypoxia and increasing the effect of the photodynamic treatment. Finally, a phospholipid derivative with c(RGDyK) was used as the targeting moiety and the nanoparticle-encapsulating material. Results: The nanoprobe exhibited good dispersion, high stability, and high photothermal conversion efficiency (~28%) for PTT as well as a photodynamic "on-off" effect on Ce6 encapsulated in mesoporous channels. The "release" of Ce6 was only triggered under photothermal stimulation in vivo. Due to its targeting ability, 72 h after injection of the probe, the tumor site in mice showed an observable CT response. The combined treatment using photothermal therapy (PTT) and catalase-enhanced photo-controlled PDT exerted a superior effect to PTT or PDT monotherapies. Conclusion: Our findings demonstrate that the use of this intelligent nanoprobe for CT-targeted image-guided treatment of tumors with integrated photothermal therapy (PTT) and catalase-enhanced controlled photodynamic therapy (PDT) may provide a novel approach for cancer theranostics.
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8
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von Baeckmann C, Guillet-Nicolas R, Renfer D, Kählig H, Kleitz F. A Toolbox for the Synthesis of Multifunctionalized Mesoporous Silica Nanoparticles for Biomedical Applications. ACS OMEGA 2018; 3:17496-17510. [PMID: 31458354 PMCID: PMC6644079 DOI: 10.1021/acsomega.8b02784] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 11/28/2018] [Indexed: 05/18/2023]
Abstract
Mesoporous silica nanoparticles (MSNs) are considered as promising next-generation nanocarriers for health-related applications. However, their effectiveness mostly relies on their efficient and surface-specific functionalization. In this contribution, we explored different strategies for the rational multistep synthesis of functional MCM-48-type MSNs with selectively created active inner and/or external surfaces. Functional groups were first installed using a combination of (delayed) co-condensation and post-grafting procedures. Both amine [(3-aminopropyl)triethoxysilane (APTS)] and thiol [(3-mercaptopropyl)trimethoxysilane (MPTS)] silanes were used, in various addition sequences. Following this, the different platforms were further functionalized with polyethylene glycol and/or with a pro-chelate ligand used as a magnetic resonance imaging contrast agent (diethylenetriaminepentaacetic acid chelates) and/or loaded with quercetin and/or grafted with an organic dye (rhodamine). The efficiency of the multiple grafting strategies and the effects on the MSN carrier properties are presented. Finally, the colloidal stability of the different systems was evaluated in physiological media, and preliminary tests were performed to verify their drug release capability. The use of MPTS appeared beneficial when compared to APTS in delayed co-condensation procedures to preserve both selective distribution of the functional groups, reactive functionality, and pore ordering. Our results provide in-depth insights into the efficient design of (multi)functional MSNs and especially on the crucial role played by the sequence of step-by-step functionalization methods aiming to produce multipurpose and stable bioplatforms.
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Affiliation(s)
- Cornelia von Baeckmann
- Department
of Inorganic Chemistry−Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090 Vienna, Austria
| | - Rémy Guillet-Nicolas
- Department
of Inorganic Chemistry−Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090 Vienna, Austria
| | - Damien Renfer
- Department
of Chemistry, Université Laval, 1045 Avenue de la Médecine, G1V0A6 Quebec, Quebec, Canada
| | - Hanspeter Kählig
- Institute
of Organic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Freddy Kleitz
- Department
of Inorganic Chemistry−Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090 Vienna, Austria
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9
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Loading of polymyxin B onto anionic mesoporous silica nanoparticles retains antibacterial activity and enhances biocompatibility. Int J Pharm 2017; 537:148-161. [PMID: 29278732 DOI: 10.1016/j.ijpharm.2017.12.039] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 12/18/2017] [Accepted: 12/21/2017] [Indexed: 11/22/2022]
Abstract
Polymyxin B is a polycationic antibiotic used as the last line treatment against antibiotic-resistant Gram negative bacteria. However, application of polymyxin B is limited because of its toxicity effects. Herein, we used bare and surface modified mesoporous silica nanoparticles (MSNs) with an average diameter of 72.29 ± 8.17 nm as adsorbent for polymyxin B to improve its therapeutic properties. The polymyxin B adsorption onto MSN surfaces was explained as a function of pH, type of buffer and surface charge of nanoparticles, according to the ζ-potential of silica nanoparticles and adsorption kinetics results. The highest value of the adsorption capacity (about 401 ± 15.38 mg polymyxin B/ g silica nanoparticles) was obtained for the bare nanoparticles in Tris buffer, pH 9. Release profiles of polymyxin B showed a sustained release pattern, fitting Power law and Hill models. The antibiotic molecules-loaded nanoparticles showed enhanced antibacterial activity compared to free antibiotic against different Gram negative bacteria. Biocompatibility evaluation results revealed that loading of polymyxin B onto MSNs can decrease the cytotoxicity effects of the drug by reducing ROS generation. Our results suggest that formulation of drugs by adsorption onto MSNs may offer a way forward to overcome the adverse effects of some antibiotics such as polymyxin B without compromising their antimicrobial properties.
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10
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Singh RK, Patel KD, Leong KW, Kim HW. Progress in Nanotheranostics Based on Mesoporous Silica Nanomaterial Platforms. ACS APPLIED MATERIALS & INTERFACES 2017; 9:10309-10337. [PMID: 28274115 DOI: 10.1021/acsami.6b16505] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Theranostics based on nanoparticles (NPs) is a promising paradigm in nanomedicine. Mesoporous silica nanoparticle (MSN)-based systems offer unique characteristics to enable multimodal imaging or simultaneous diagnosis and therapy. They include large surface area and volume, tunable pore size, functionalizable surface, and acceptable biological safety. Hybridization with other NPs and chemical modification can further potentiate the multifunctionality of MSN-based systems toward translation. Here, we update the recent progress on MSN-based systems for theranostic purposes. We discuss various synthetic approaches used to construct the theranostic platforms either via intrinsic chemistry or extrinsic combination. These include defect generation in the silica structure, encapsulation of diagnostic NPs within silica, their assembly on the silica surface, and direct conjugation of dye chemicals. Collectively, in vitro and in vivo results demonstrate that multimodal imaging capacities can be integrated with the therapeutic functions of these MSN systems for therapy. With further improvement in bioimaging sensitivity and targeting specificity, the multifunctional MSN-based theranostic systems will find many clinical applications in the near future.
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Affiliation(s)
- Rajendra K Singh
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University , Cheonan 330-714, South Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University , Cheonan 330-714, South Korea
| | - Kapil D Patel
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University , Cheonan 330-714, South Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University , Cheonan 330-714, South Korea
| | - Kam W Leong
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University , Cheonan 330-714, South Korea
- Department of Biomedical Engineering, Columbia University , New York, New York 10027, United States
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University , Cheonan 330-714, South Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University , Cheonan 330-714, South Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University , Cheonan 330-714, South Korea
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11
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Soto RJ, Yang L, Schoenfisch MH. Functionalized Mesoporous Silica via an Aminosilane Surfactant Ion Exchange Reaction: Controlled Scaffold Design and Nitric Oxide Release. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2220-31. [PMID: 26717238 PMCID: PMC4734612 DOI: 10.1021/acsami.5b10942] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 12/30/2015] [Indexed: 05/22/2023]
Abstract
Nitric oxide-releasing mesoporous silica nanoparticles (MSNs) were prepared using an aminosilane-template surfactant ion exchange reaction. Initially, bare silica particles were synthesized under basic conditions in the presence of cetyltrimethylammonium bromide (CTAB). These particles were functionalized with nitric oxide (NO) donor precursors (i.e., secondary amines) via the addition of aminosilane directly to the particle sol and a commensurate ion exchange reaction between the cationic aminosilanes and CTAB. N-Diazeniumdiolate NO donors were formed at the secondary amines to yield NO-releasing MSNs. Tuning of the ion exchange-based MSN modification approach allowed for the preparation of monodisperse particles ranging from 30 to 1100 nm. Regardless of size, the MSNs stored appreciable levels of NO (0.4-1.5 μmol mg(-1)) with tunable NO release durations (1-33 h) dependent on the aminosilane modification. Independent control of NO release properties and particle size was achieved, demonstrating the flexibility of this novel MSN synthesis over conventional co-condensation and surface grafting strategies.
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12
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Zucchetto N, Brühwiler D. Functionalization of arrays of silica nanochannels by post-condensation. Dalton Trans 2016; 45:14363-9. [DOI: 10.1039/c6dt02033j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Functionalized arrays of silica nanochannels (ASNCs) were prepared by post-condensation. This synthetic approach allows control of the functional group distribution in a one-pot reaction, while preserving the defined nanoporous structure of the ASNCs.
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Affiliation(s)
- N. Zucchetto
- Institute of Chemistry and Biotechnology
- Zürich University of Applied Sciences (ZHAW)
- CH-8820 Wädenswil
- Switzerland
| | - D. Brühwiler
- Institute of Chemistry and Biotechnology
- Zürich University of Applied Sciences (ZHAW)
- CH-8820 Wädenswil
- Switzerland
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13
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Amolegbe SA, Ohmagari H, Wakata K, Takehira H, Ohtani R, Nakamura M, Yu C, Hayami S. Synthesis of mesoporous materials as nano-carriers for an antimalarial drug. J Mater Chem B 2016; 4:1040-1043. [DOI: 10.1039/c5tb02200b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An antimalarial drug artesunate (ATS) was encapsulated in both functionalized MCM-41 and ordinary MCM-41 with an excellent loading capacity and sustained release behavior for possible biomedical applications.
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Affiliation(s)
- Saliu Alao Amolegbe
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Hitomi Ohmagari
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Kosuke Wakata
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Hiroshi Takehira
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Ryo Ohtani
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Masaaki Nakamura
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland Queensland
- Australia
| | - Shinya Hayami
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
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14
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Gao J, Zhang X, Lu Y, Liu S, Liu J. Selective Functionalization of Hollow Nanospheres with Acid and Base Groups for Cascade Reactions. Chemistry 2015; 21:7403-7. [DOI: 10.1002/chem.201500532] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Indexed: 01/08/2023]
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15
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Tao Y, Ju E, Ren J, Qu X. Bifunctionalized mesoporous silica-supported gold nanoparticles: intrinsic oxidase and peroxidase catalytic activities for antibacterial applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1097-104. [PMID: 25655182 DOI: 10.1002/adma.201405105] [Citation(s) in RCA: 369] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 05/18/2023]
Abstract
Bifunctionalized mesoporous silica-supported gold nanoparticles as oxidase and peroxidase mimics for antibacterial applications are demonstrated. For the first time, these mesoporous silica-supported gold nanoparticles are applied as oxidase and peroxidase mimics. Taking advantage of their prominent enzyme activities, the MSN-AuNPs show excellent antibacterial properties against both Gram-negative and Gram-positive bacteria. Furthermore, MSN-AuNPs also exhibit outstanding performance in biofilm elimination .
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Affiliation(s)
- Yu Tao
- State Key Laboratory of Rare Earth Resource Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Changchun, 130022, China; Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun, 130022, China
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16
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Luk JZ, Cork J, Cooper-White J, Grøndahl L. Use of two-step grafting to fabricate dual-functional films and site-specific functionalized scaffolds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1746-54. [PMID: 25598325 DOI: 10.1021/la504629h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Polycaprolactone (PCL) is a widely utilized bioresorbable polymer in tissue engineering applications. However, the absence of intrinsic functional groups in the polymer backbone necessitates the incorporation of functional chemistries to enable the further addition of bioactive molecules to PCL-based surfaces and scaffolds. The current study aimed to incorporate two different functional groups, amine and carboxylate, first on two-dimensional (2D) spin-coated PCL films and, thereafter, throughout all surfaces within three-dimensional (3D) porous PCL-based scaffolds, produced using the thermally induced phase separation (TIPS) method, but in a spatially separated manner. Specifically, gamma irradiation induced grafting of acrylic acid (AA) and 2-aminoethyl methacrylate hydrochloride (AEMA) onto PCL was performed in selected solvents and the resulting substrates were characterized using X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurements to determine the surface free energy. Results demonstrated that stepwise graft copolymerization of AEMA and AA allows the fabrication of dual-functional surfaces, with chemistry depending on the order of grafting of the two monomers. In addition, 3D scaffolds could be decorated exclusively with carboxylate groups in the interior, while the outer surface displayed dual-functionality. This simple surface modification methodology, with the ability to create spatially separated surface functional groups throughout 3D porous scaffolds post their fabrication, has the potential to be applied to many current and future scaffold systems being investigated in the field of tissue engineering.
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Affiliation(s)
- Jing Zhong Luk
- School of Chemistry and Molecular Biosciences, ‡The Australian Institute for Bioengineering and Nanotechnology, and §School of Chemical Engineering, University of Queensland , Brisbane, Queensland 4072, Australia
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17
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Abstract
Partial pseudomorphic transformation of SBA-15 yields bimodal mesoporous silica with defined bottlenecks that restrict the access to the core of the particles.
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Affiliation(s)
- M. J. Reber
- Institute of Chemistry and Biological Chemistry
- Zürich University of Applied Sciences
- CH-8820 Wädenswil
- Switzerland
| | - D. Brühwiler
- Institute of Chemistry and Biological Chemistry
- Zürich University of Applied Sciences
- CH-8820 Wädenswil
- Switzerland
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18
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Taebnia N, Morshedi D, Doostkam M, Yaghmaei S, Aliakbari F, Singh G, Arpanaei A. The effect of mesoporous silica nanoparticle surface chemistry and concentration on the α-synuclein fibrillation. RSC Adv 2015. [DOI: 10.1039/c5ra08405a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Surface chemistry/charge and concentration of mesoporous silica nanoparticles have a great impact on the fibrillation process of α-Syn protein.
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Affiliation(s)
- Nayere Taebnia
- Department of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
- Department of Chemical and Petroleum Engineering
| | - Dina Morshedi
- Department of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
| | - Mohsen Doostkam
- Department of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
| | - Soheila Yaghmaei
- Department of Chemical and Petroleum Engineering
- Sharif University of Technology
- Tehran
- Iran
| | - Farhang Aliakbari
- Department of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
| | - Gurvinder Singh
- Department of Materials Science and Engineering
- Norwegian University of Science and Technology
- Trondheim
- Norway
| | - Ayyoob Arpanaei
- Department of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
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19
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Zhang A, Gu L, Hou K, Dai C, Song C, Guo X. Mesostructure-tunable and size-controllable hierarchical porous silica nanospheres synthesized by aldehyde-modified Stöber method. RSC Adv 2015. [DOI: 10.1039/c5ra09456a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Mesostructure-fine-tuned and size-controlled hierarchical porous silica nanospheres were synthesized by aldehyde-modified Stöber method in the TEOS–CTAB–NH3·H2O–aldehyde system.
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Affiliation(s)
- Anfeng Zhang
- State Key Lab of Fine Chemicals
- PSU-DUT Joint Center for Energy Research
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Lin Gu
- Shanghai Baosteel Chemical Co., Ltd
- Shanghai
- P. R. China
| | - Keke Hou
- Chambroad Chemical Industry Research Institute Co., Ltd
- Binzhou
- P. R. China
| | - Chengyi Dai
- State Key Lab of Fine Chemicals
- PSU-DUT Joint Center for Energy Research
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Chunshan Song
- State Key Lab of Fine Chemicals
- PSU-DUT Joint Center for Energy Research
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Xinwen Guo
- State Key Lab of Fine Chemicals
- PSU-DUT Joint Center for Energy Research
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
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20
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Roik N, Belyakova L. Chemical design of pH-sensitive nanovalves on the outer surface of mesoporous silicas for controlled storage and release of aromatic amino acid. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.04.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Steinbacher JL, Landry CC. Adsorption and release of siRNA from porous silica. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4396-405. [PMID: 24087929 PMCID: PMC3997627 DOI: 10.1021/la402850m] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Porous silica particles are potential transfection agents for nucleic acid-based therapies because of their large specific surface areas and pore volumes and the ease with which they can be chemically modified to maximize the loading of cargo and to effect targeting in vivo. Here, we present a systematic study of the effects of pore size and pore modification on the adsorption and release of short, interfering RNA (siRNA) from a mesoporous silica particle developed in our laboratory. Using adsorption isotherms and release experiments, we found that the short polyamine diethylenetriamine was the best chemical modification for achieving both the adsorption and release of large amounts of siRNA. The degree of functionalization with diethylenetriamine caused drastic changes in the loading capacity and binding strength of siRNA to silica with relatively large pores (8 nm and larger), but the degree of functionalization had a weaker effect in narrow pores (4 nm). Multilayer adsorption could occur in materials with large pores (15 nm). Release experiments showed that intermediate pore sizes and intermediate degrees of functionalization resulted in the best compromise between maximizing loading (from strong adsorption) and maximizing release. Capillary electrophoresis and quantitative, real-time PCR demonstrated that siRNA was released intact and that these particles functioned as a transfection agent of mammalian cells in vitro.
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22
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Roik NV, Belyakova LA. Bifunctional mesoporous silicas with clearly distinguished localization of grafted groups. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2013. [DOI: 10.1134/s0036024413120194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Roik N, Belyakova L. Sol–gel synthesis of MCM-41 silicas and selective vapor-phase modification of their surface. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.09.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Landsmann S, Luka M, Polarz S. Bolaform surfactants with polyoxometalate head groups and their assembly into ultra-small monolayer membrane vesicles. Nat Commun 2013; 3:1299. [PMID: 23250429 PMCID: PMC3535418 DOI: 10.1038/ncomms2321] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 11/22/2012] [Indexed: 11/09/2022] Open
Abstract
Surfactants are indispensable in established technologies as detergents or emulsification agents, and also in recent studies for controlling the growth of nanoparticles or for creating nanocarriers. Although the properties of conventional, organic surfactants are thoroughly explored, strong interest persists in surfactants that possess unique features inaccessible for ordinary systems. Here we present dipolar, bolaform surfactants with a head group comprising of 11 tungsten atoms. These novel compounds are characterized by an exceptionally low critical self-organization concentration, which leads to monolayer vesicles with a diameter of only 15 nm, that is, substantially smaller than for any other system. The membrane of the vesicles is impermeable for water-soluble and oil-soluble guests. Control over release kinetics, which can be followed via the quantitative fluorescence quenching of confined fluorophores, is gained by means of pH adjustments.
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Affiliation(s)
- Steve Landsmann
- Department of Chemistry, University of Konstanz, D-78457 Konstanz, Germany
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25
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Wu CC, Sailor MJ. Selective functionalization of the internal and the external surfaces of mesoporous silicon by liquid masking. ACS NANO 2013; 7:3158-3167. [PMID: 23451853 DOI: 10.1021/nn305574e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A general approach for selective, differential functionalization of the interior and exterior surfaces of mesoporous Si is reported. The method employs two immiscible liquids, one inert and the other chemically reactive with the porous Si nanostructure. First, a porous Si sample is prepared by electrochemical etch and then it is mildly oxidized, which places a thin layer of silicon oxide at the surface. The inner pore walls of the partially oxidized porous Si film are then infiltrated with an inert liquid (octane). The sample is then immersed in aqueous solution containing hydrogen fluoride (HF), which serves as the reactive liquid. The hydrophobic phase is retained in the interior of the porous nanostructure, and HF(aq) attacks only the exposed surfaces of the oxidized porous Si sample, generating a hydrophobic, hydrogen-terminated (Si-H) outer layer. The reaction is self-limiting due to the immiscibility of octane and water, and the extent of penetration of the Si-H surface into the porous layer is dependent on the time of exposure to HF(aq). The Si-H surface can then be modified by thermal hydrosilylation (1-dodecene or 10-bromo-1-decene) in a subsequent step, resulting in a bifunctional porous Si film containing hydrophobic pore entrances to hydrophilic inner pores. The hydrophobic dodecyl species at the mouths of the pores is found to form a barrier for molecular transport; it decreases the rate of leaching (into water) of a rhodamine test molecule that is preloaded into the sample by >8 fold.
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Affiliation(s)
- Chia-Chen Wu
- Materials Science and Engineering, Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
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26
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Nakazawa J, Hori T, Stack TDP, Hikichi S. Alkane Oxidation by an Immobilized Nickel Complex Catalyst: Structural and Reactivity Differences Induced by Surface-Ligand Density on Mesoporous Silica. Chem Asian J 2013; 8:1191-9. [DOI: 10.1002/asia.201300165] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Indexed: 11/06/2022]
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27
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Hiruta Y, Sato C, Takahashi Y, Kubobuchi K, Shichi Y, Citterio D, Suzuki K. Li+-selective optodes – effect of fluoroionophore distribution in mesoporous silica thin films on Li+ response. RSC Adv 2013. [DOI: 10.1039/c3ra22904a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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28
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Teng Z, Sun C, Su X, Liu Y, Tang Y, Zhao Y, Chen G, Yan F, Yang N, Wang C, Lu G. Superparamagnetic high-magnetization composite spheres with highly aminated ordered mesoporous silica shell for biomedical applications. J Mater Chem B 2013; 1:4684-4691. [DOI: 10.1039/c3tb20844c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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29
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Xu W, Riikonen J, Lehto VP. Mesoporous systems for poorly soluble drugs. Int J Pharm 2012; 453:181-97. [PMID: 22990124 DOI: 10.1016/j.ijpharm.2012.09.008] [Citation(s) in RCA: 133] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 08/31/2012] [Accepted: 09/03/2012] [Indexed: 01/13/2023]
Abstract
Utilization of inorganic mesoporous materials in formulations of poorly water-soluble drugs to enhance their dissolution and permeation behavior is a rapidly growing area in pharmaceutical materials research. The benefits of mesoporous materials in drug delivery applications stem from their large surface area and pore volume. These properties enable the materials to accommodate large amounts of payload molecules, protect them from premature degradation, and promote controlled and fast release. As carriers with various morphologies and chemical surface properties can be produced, these materials may even promote adsorption from the gastrointestinal tract to the systemic circulation. The main concern regarding their clinical applications is still the safety aspect even though most of them have been reported to be safely excreted, and a rather extensive toxicity screening has already been conducted with the most frequently studied mesoporous materials. In addition, the production of the materials on a large scale and at a reasonable cost may be a challenge when considering the utilization of the materials in industrial processes. However, if mesoporous materials could be employed in the industrial crystallization processes to produce hybrid materials with poorly soluble compounds, and hence to enhance their oral bioavailability, this might open new avenues for the pharmaceutical industry to employ nanotechnology in their processes.
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Affiliation(s)
- Wujun Xu
- Department of Applied Physics, University of Eastern Finland, POB 1627, FI-70211 Kuopio, Finland
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30
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Formation of a long-lived electron-transfer state in mesoporous silica-alumina composites enhances photocatalytic oxygenation reactivity. Proc Natl Acad Sci U S A 2012; 109:15572-7. [PMID: 22543164 DOI: 10.1073/pnas.1119994109] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A simple donor-acceptor linked dyad, 9-mesityl-10-methylacridinium ion (Acr(+)-Mes) was incorporated into nanosized mesoporous silica-alumina to form a composite, which in acetonitrile is highly dispersed. In this medium, upon visible light irradiation, the formation of an extremely long-lived electron-transfer state (Acr(•)-Mes(•+)) was confirmed by EPR and laser flash photolysis spectroscopic methods. The composite of Acr(+)-Mes-incorporated mesoporous silica-alumina with an added copper complex [(tmpa)Cu(II)] (ClO(4)(-))2 (tmpa = tris(2-pyridylmethyl)amine) acts as an efficient and robust photocatalyst for the selective oxygenation of p-xylene by molecular oxygen to produce p-tolualdehyde and hydrogen peroxide. Thus, incorporation of Acr(+)-Mes into nanosized mesoporous silica-alumina combined with an O(2)-reduction catalyst ([(tmpa)Cu(II)](2+)) provides a promising method in the development of efficient and robust organic photocatalysts for substrate oxygenation by dioxygen, the ultimate environmentally benign oxidant.
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31
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Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2011.07.006] [Citation(s) in RCA: 381] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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32
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Dufort S, Sancey L, Coll JL. Physico-chemical parameters that govern nanoparticles fate also dictate rules for their molecular evolution. Adv Drug Deliv Rev 2012; 64:179-89. [PMID: 21983079 DOI: 10.1016/j.addr.2011.09.009] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 06/23/2011] [Accepted: 09/01/2011] [Indexed: 12/23/2022]
Abstract
Nanoparticles are efficient to safely deliver therapeutic and imaging contrast agents to tumors for cancer diagnostic and therapy, if they can escape the reticuloendothelial system (RES) and accumulate in tumors either passively due to the enhanced permeability and retention (EPR) effect or actively via a specific ligand. The main hallmark of nanoparticles is their large surface areas, which, depending of their chemical compositions, surface coatings, electric charges, sizes and shapes, will generate complex, extremely dynamic and continuous interactions and exchanges between the nanoparticles and the different molecules present in the blood. Special attention will be paid to explain how the nanoparticles were improved step by step in order to adapt our increasing knowledge on their biophysics. In particular, we will discuss the influence of PEGylation, the difficulties to generate actively targeted particles and finally the actual trends in the manufacturing of "third-generation" smart particles.
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33
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Nakazawa J, Smith BJ, Stack TDP. Discrete complexes immobilized onto click-SBA-15 silica: controllable loadings and the impact of surface coverage on catalysis. J Am Chem Soc 2012; 134:2750-9. [PMID: 22277027 DOI: 10.1021/ja210400u] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Azidopropyl functionalized mesoporous silica SBA-15 were prepared with variable azide loadings of 0.03-0.7 mmol g(-1) (~2-50% of maximal surface coverage) through a direct synthesis, co-condensation approach. These materials are functionalized selectively with ethynylated organic moieties through a copper-catalyzed azide alkyne cycloaddition (CuAAC) or "click" reaction. Specific loading within a material can be regulated by either the azide loading or limiting the alkyne reagent relative to the azide loading. The immobilization of ferrocene, pyrene, tris(pyridylmethyl)amine (TPA), and iron porphyrin (FeTPP) demonstrates the robust nature and reproducibility of this two-step synthetic attachment strategy. Loading-sensitive pyrene fluorescence correlates with a theoretically random surface distribution, rather than a uniform one; site-isolation of tethered moieties ~15 Å in length occurs at loadings less than 0.02 mmol g(-1). The effect of surface loading on reactivity is observed in the oxygenation of SBA-15-[Cu(I)(TPA)]. SBA-15-[Mn(II)(TPA)]-catalyzed epoxidation exhibits a systematic dependence on surface loading. A comparison of homogeneous, site-isolated and site-dense complexes provides insight into catalyst speciation and ligand activity.
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Affiliation(s)
- Jun Nakazawa
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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34
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Cheng K, El-Boubbou K, Landry CC. Binding of HIV-1 gp120 glycoprotein to silica nanoparticles modified with CD4 glycoprotein and CD4 peptide fragments. ACS APPLIED MATERIALS & INTERFACES 2012; 4:235-243. [PMID: 22117536 DOI: 10.1021/am2013008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An important step in human immunodeficiency virus infection involves the interaction between the viral envelope glycoprotein gp120 and the human host cell surface receptor CD4. Herein, we describe a CD4-functionalized mesoporous silica-based system to selectively capture HIV-gp120 with high binding efficiency. Using a protection-deprotection strategy developed recently by our group, the external surface of the mesoporous particles was selectively functionalized with soluble CD4 ("sCD4") or an 18-peptide fragment mimicking the gp120 binding region. Confocal microscopy confirmed the CD4 locations and showed that the internal pores can be made accessible after external modification in a controlled manner. An evaluation of the ability of an 18-peptide CD4 fragment versus amide-immobilized sCD4 and sCD4 immobilized through its glycosidic group indicated that while all peptides were selective, the latter method was clearly best, with nearly complete removal of whole gp120 from solution. This study shows, for the first time, that sCD4 bound to mesoporous silica particles actively recognizes and retains high binding affinity for HIV-gp120. It is anticipated that, by proper modification of the accessible internal pores, our methodology can be adopted to develop porous platforms for HIV diagnosis, imaging, drug delivery, and vaccine development.
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Affiliation(s)
- Kai Cheng
- Department of Chemistry, University of Vermont, 82 University Place, Burlington, Vermont 05405, USA
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35
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Zhang Y, Chen Y. Fmoc-Cl fluorescent determination for amino groups of nanomaterial science. IET Nanobiotechnol 2012; 6:76-80. [DOI: 10.1049/iet-nbt.2011.0027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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36
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Kim MS, Jeon JB, Chang JY. Preparation of mesoporous silica particles with carbon-coated pore walls: selective grafting of polyacrylonitrile onto the inner surface of a mesoporous silica particle and carbonization. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm34188c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Seo S, Lee JH, Cho Y, Kim JG, Kim C, Jung JH. Distinctly Different Chemical Functionalities on the Internal and the External Surfaces of Silica Nanotubes, and Their Applications as Multi-Chemosensors. Chemistry 2011; 17:7433-7. [DOI: 10.1002/chem.201100011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Revised: 03/03/2011] [Indexed: 11/12/2022]
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38
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Lin C, Zhu W, Yang H, An Q, Tao CA, Li W, Cui J, Li Z, Li G. Facile Fabrication of Stimuli-Responsive Polymer Capsules with Gated Pores and Tunable Shell Thickness and Composite. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007747] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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39
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Lin C, Zhu W, Yang H, An Q, Tao CA, Li W, Cui J, Li Z, Li G. Facile Fabrication of Stimuli-Responsive Polymer Capsules with Gated Pores and Tunable Shell Thickness and Composite. Angew Chem Int Ed Engl 2011; 50:4947-51. [DOI: 10.1002/anie.201007747] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Nakahara Y, Takeuchi T, Yokoyama S, Kimura K. Quantitative 1
H NMR analysis of reacted silanol groups in silica nanoparticles chemically modified with monochlorosilanes. SURF INTERFACE ANAL 2011. [DOI: 10.1002/sia.3633] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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41
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Guan B, Ciampi S, Le Saux G, Gaus K, Reece PJ, Gooding JJ. Different functionalization of the internal and external surfaces in mesoporous materials for biosensing applications using "click" chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:328-334. [PMID: 21141983 DOI: 10.1021/la102599m] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the use of copper(I)-catalyzed alkyne-azide cycloaddition reaction (CuAAC) to selectively functionalize the internal and external surfaces of mesoporous materials. Porous silicon rugate filters with narrow line width reflectivity peaks were employed to demonstrate this selective surface functionalization approach. Hydrosilylation of a dialkyne species, 1,8-nonadiyne, was performed to stabilize the freshly fabricated porous silicon rugate filters against oxidation and to allow for further chemical derivatization via "click" CuAAC reactions. The external surface was modified through CuAAC reactions performed in the absence of nitrogen-based Cu(I)-stabilizing species (i.e., ligand-free reactions). To subsequently modify the interior pore surface, stabilization of the Cu(I) catalyst was required. Optical reflectivity measurements, water contact angle measurements, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) were used to demonstrate the ability of the derivatization approach to selectively modify mesoporous materials with different surface chemistry on the exterior and interior surfaces. Furthermore, porous silicon rugate filters modified externally with the cell-adhesive peptide Gly-Arg-Gly-Asp-Ser (GRGDS) allowed for cell adhesion via formation of focal adhesion points. Results presented here demonstrate a general approach to selectively modify mesoporous silicon samples with potential applications for cell-based biosensing.
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Affiliation(s)
- Bin Guan
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
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42
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Jin D, Park KW, Lee JH, Song K, Kim JG, Seo ML, Jung JH. The selective immobilization of curcumin onto the internal surface of mesoporous hollow silica particles by covalent bonding and its controlled release. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03846f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Kim MS, Chang JY. Preparation of multifunctional mesoporous silica particles: the use of an amphiphilic silica precursor with latent amine functionality in selective functionalization of the inner surface. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10440c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Linares N, Serrano E, Rico M, Mariana Balu A, Losada E, Luque R, García-Martínez J. Incorporation of chemical functionalities in the framework of mesoporous silica. Chem Commun (Camb) 2011; 47:9024-35. [DOI: 10.1039/c1cc11016k] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Huang Y, Xu S, Lin VSY. Bifunctionalized Mesoporous Materials with Site-Separated Brønsted Acids and Bases: Catalyst for a Two-Step Reaction Sequence. Angew Chem Int Ed Engl 2010; 50:661-4. [DOI: 10.1002/anie.201004572] [Citation(s) in RCA: 133] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 10/31/2010] [Indexed: 11/05/2022]
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46
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Huang Y, Xu S, Lin VSY. Bifunctionalized Mesoporous Materials with Site-Separated Brønsted Acids and Bases: Catalyst for a Two-Step Reaction Sequence. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004572] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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47
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Cheng K, Blumen SR, MacPherson MB, Steinbacher JL, Mossman BT, Landry CC. Enhanced uptake of porous silica microparticles by bifunctional surface modification with a targeting antibody and a biocompatible polymer. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2489-95. [PMID: 20707315 PMCID: PMC2947489 DOI: 10.1021/am100530t] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Strategies were developed by which mesoporous microparticles were modified on their external surfaces with tetraethylene glycol (TEG), a protein, or both, leaving the pore surfaces available for modification with a separate moiety, such as a dye. Only particles bifunctionally modified with both TEG and a cell-specific antibody were taken up specifically by a targeted cancer cell line. In contrast to similarly functionalized nanoparticles, endocytosed microparticles were not contained within a lysosome.
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Affiliation(s)
- Kai Cheng
- Department of Chemistry, University of Vermont, Burlington, VT 05405
| | - Steven R. Blumen
- Department of Pathology, University of Vermont, Burlington, VT 05405
| | | | | | - Brooke T. Mossman
- Department of Pathology, University of Vermont, Burlington, VT 05405
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48
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Abstract
Functionalized mesoporous silica offers promising possibilities for numerous applications, including drug delivery, catalysis, and adsorption. This minireview focuses on recent developments related to the postsynthetic positioning of functional groups on mesoporous silica. After briefly introducing the reagents that are commonly used for this purpose, methods to control and to analyze the distribution of the grafted functional groups are discussed, with particular emphasis on concepts that allow the placement of the groups at specific distances from each other, as well as on approaches towards the selective functionalization of the external particle surface.
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Affiliation(s)
- Dominik Brühwiler
- Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland.
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49
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Lunn JD, Shantz DF. Novel polypeptide/thiol--SBA-15 hybrid materials synthesized via surface selective grafting. Chem Commun (Camb) 2010; 46:2926-8. [PMID: 20386825 DOI: 10.1039/b927487a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel hybrid materials are synthesized through the surface selective grafting of poly-L-lysine and thiols from SBA-15.
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Affiliation(s)
- Jonathan D Lunn
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, 3122 TAMU, College Station, Texas, USA
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50
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Ng JBS, Kamali-Zare P, Sörensen M, Brismar H, Hedin N, Bergström L. Intraparticle transport and release of dextran in silica spheres with cylindrical mesopores. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:466-470. [PMID: 19769352 DOI: 10.1021/la902092e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The transport of oligomeric molecules in silica spheres with cylindrical mesopores has been quantified and related to the structural features of the spherical particles and the interactions at the solid-liquid interface. An emulsion-solvent evaporation method was used to produce silica spheres having cylindrical mesopores with an average pore diameter of 6.5 nm. The transport of dextran molecules (fluorescently tagged) with molecular weights of 3000 and 10,000 g/mol was quantified using confocal laser scanning microscopy (CLSM). The intraparticle concentration profiles in the dextran-containing spheres were flat at all times, suggesting that the release is not isotropic and not limited by diffusion. The release of dextran into the solution is characterized by an initial burst, followed by long-term sustained release. The release follows a logarithmic time dependency, which was rationalized by coupling concentration-dependent effective diffusion constants with adsorption/desorption.
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Affiliation(s)
- Jovice B S Ng
- Materials Chemistry Research Group, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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