1
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High-Performance Properties of an Aerospace Epoxy Resin Loaded with Carbon Nanofibers and Glycidyl Polyhedral Oligomeric Silsesquioxane. AEROSPACE 2022. [DOI: 10.3390/aerospace9040222] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
This paper proposes a new multifunctional flame retardant carbon nanofiber/glycidyl polyhedral oligomeric silsesquioxane (GPOSS) epoxy formulation specially designed for lightweight composite materials capable of fulfilling the ever-changing demands of the future aerospace industry. The multifunctional resin was designed to satisfy structural and functional requirements. In particular, this paper explores the advantages deriving from the combined use of GPOSS and CNFs (short carbon nanofibers) to obtain multifunctional resins. The multifunctional material was prepared by incorporating in the epoxy matrix heat-treated carbon nanofibers (CNFs) at the percentage of 0.5 wt% and GPOSS compound at 5 wt% in order to increase the mechanical performance, electrical conductivity, thermal stability and flame resistance property of the resulting nanocomposite. Dynamic mechanical analysis (DMA) shows that the values of the Storage Modulus (S.M.) of the resin alone and the resin containing solubilized GPOSS nanocages are almost similar in a wide range of temperatures (from 30 °C to 165 °C). The presence of CNFs, in the percentage of 0.5 wt%, determines an enhancement in the S.M. of 700 MPa from −30 °C to 180 °C with respect to the resin matrix and the resin/GPOSS systems. Hence, a value higher than 2700 MPa is detected from 30 °C to 110 °C. Furthermore, the electrical conductivity of the sample containing both GPOSS and CNFs reaches the value of 1.35 × 10−1 S/m, which is a very satisfying value to contrast the electrical insulating property of the epoxy systems. For the first time, TUNA tests have been performed on the formulation where the advantages of GPOSS and CNFs are combined. TUNA investigation highlights an electrically conductive network well distributed in the sample. The ignition time of the multifunctional nanocomposite is higher than that of the sample containing GPOSS alone of about 35%.
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2
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Synthesis of Novel Luminescent Double-Decker Silsesquioxanes Based on Partially Condensed TetraSilanolPhenyl POSS and Tb3+/Eu3+ Lanthanide Ions. Processes (Basel) 2022. [DOI: 10.3390/pr10040758] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
In this study, novel lanthanide-containing double-decker polyhedral oligomeric silsesquioxanes (POSS) were prepared by combining the partially condensed TetraSilanolPhenyl POSS with terbium (Tb3+) and europium (Eu3+) ions. This open-cage POSS possesses four diametrically opposite silanol groups that are able to coordinate, under mild conditions, different luminescent ions through a simple corner-capping method. The two metal-containing POSS functionalized with Tb3+ and with an equimolar combination of Tb3+ and Eu3+ show a completely condensed structure with different luminescent properties. Their emission features depend on the chemical nature of the metal ions incorporated in the framework. An improved stokes shift was detected in the bimetallic compound containing both the Tb3+ and Eu3+ ions, promoted by the occurrence of a Tb3+→Eu3+ energy transfer mechanism. These characteristics identify this metal-functionalized silica platform as a potential candidate for the development of novel luminescent devices.
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3
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Gon M, Tanaka K, Chujo Y. Recent Progresses on Designable Hybrids with Stimuli-Responsive Optical Properties Originating from Molecular Assembly Concerning Polyhedral Oligomeric Silsesquioxane. Chem Asian J 2022; 17:e202200144. [PMID: 35322576 DOI: 10.1002/asia.202200144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/18/2022] [Indexed: 11/10/2022]
Abstract
In this review, we describe recent progresses on the stimuli-responsive hybrid materials based on polyhedral oligomeric silsesquioxane (POSS) and their applications as a chemical sensor. In particular, we explain the unique functions originating from molecular assembly concerning POSS-containing soft materials mainly from our studies. POSS has an inorganic cubic core composed of silicon-oxygen (Si-O) bonds and organic substituents at each vertex. Owing to intrinsic properties of POSS, such as high thermal stability, rigidity, and low chemical reactivity, various robust hybrid materials have been developed. From the numerous numbers of POSS hybrids, we herein focus on the environment-sensitive optical materials in which molecular assembly of POSS itself and functional units connected to POSS should be a key factor for expressing material properties. We also explain the mechanisms of chemical sensors originating from these stimuli-responsive optical properties. Stimuli-responsive excimer emission and pollutant detectors, nanoplastic sensors with the water-dispersive POSS networks, trans fatty acid sensors, turn-on luminescent sensors for aerobic condition and fluoride anion sensors are described. We also mention the mechanochromic polyurethane hybrids and the thermally-durable mechanochromic luminescent materials. The roles of the unique optical properties from soft materials composed of rigid POSS, which doesn't have significant light-absorption and emission properties in the visible region, are surveyed.
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Affiliation(s)
- Masayuki Gon
- Kyoto University: Kyoto Daigaku, Polymer Chemistry, Kyoto University, Katsura Nishikyo-ku, 615-8510, Kyoto, JAPAN
| | - Kazuo Tanaka
- Kyoto University, Graduate School of Engineering, Department of Polymer Chemistry, Katsura, Nishikyo-ku, 615-8510, Kyoto, JAPAN
| | - Yoshiki Chujo
- Kyoto University: Kyoto Daigaku, Polymer chemistry, Kyoto University, Katsura Nishikyo-ku, 615-8510, Kyoto, JAPAN
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4
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Pérez‐Pérez J, Hernández‐Balderas U, Martínez‐Otero D, Moya‐Cabrera M, Jancik V. Alkali Metallosilicates: Synthesis, Structure and Evaluation in the ROP of ϵ‐Caprolactone. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jovana Pérez‐Pérez
- Universidad Nacional Autónoma de México Instituto de Química Ciudad Universitaria Ciudad de México 04510 México
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carr. Toluca-Atlacomulco km 14.5 50200 Toluca Estado de México México
| | - Uvaldo Hernández‐Balderas
- Universidad Nacional Autónoma de México Instituto de Química Ciudad Universitaria Ciudad de México 04510 México
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carr. Toluca-Atlacomulco km 14.5 50200 Toluca Estado de México México
| | - Diego Martínez‐Otero
- Universidad Nacional Autónoma de México Instituto de Química Ciudad Universitaria Ciudad de México 04510 México
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carr. Toluca-Atlacomulco km 14.5 50200 Toluca Estado de México México
| | - Mónica Moya‐Cabrera
- Universidad Nacional Autónoma de México Instituto de Química Ciudad Universitaria Ciudad de México 04510 México
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carr. Toluca-Atlacomulco km 14.5 50200 Toluca Estado de México México
| | - Vojtech Jancik
- Universidad Nacional Autónoma de México Instituto de Química Ciudad Universitaria Ciudad de México 04510 México
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carr. Toluca-Atlacomulco km 14.5 50200 Toluca Estado de México México
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5
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Abstract
The continuously decreasing size of device features in microelectronics draws growing attention to the structuring of silicon at the molecular level with powerful tools provided by synthetic chemistry. Silicon clusters are of particular importance in this regard not only as potential precursors for silicon deposition but also as well-defined model systems for bulk and surfaces of silicon at the nanoscale as well as possible starting points for future construction of molecularly precise device structures. This review aims to give a comprehensive overview about the state of the art in the synthesis of molecular silicon clusters, which are grouped into (1) electron-precise saturated clusters, (2) soluble polyhedral Zintl anions, and (3) unsaturated silicon clusters, the so-called siliconoids. Particular attention is paid to functionalization as it is generally considered a necessary prerequisite for the design and construction of more extended systems. The interrelations between the three different classes of molecular silicon clusters, e.g., arising from the introduction of negatively charged functional groups, are highlighted on grounds of NMR properties and computed electronic structures.
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Affiliation(s)
- Yannic Heider
- Chair of General and Inorganic Chemistry, Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - David Scheschkewitz
- Chair of General and Inorganic Chemistry, Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
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6
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Pohl S, Janka O, Füglein E, Kickelbick G. Thermoplastic Silsesquioxane Hybrid Polymers with a Local Ladder-Type Structure. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00310] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Svenja Pohl
- Inorganic Solid-State Chemistry, Saarland University, Campus, Building C4 1, 66123 Saarbrücken, Germany
| | - Oliver Janka
- Inorganic Solid-State Chemistry, Saarland University, Campus, Building C4 1, 66123 Saarbrücken, Germany
| | - Ekkehard Füglein
- NETZSCH-Gerätebau GmbH, Wittelsbacherstraße 42, 95100 Selb, Germany
| | - Guido Kickelbick
- Inorganic Solid-State Chemistry, Saarland University, Campus, Building C4 1, 66123 Saarbrücken, Germany
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7
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Loganathan P, K. K. R. D, Shanmugan S. A superhydrophobic covalent zeolitic imidazolate framework-polyhedral oligomeric silsesquioxane hybrid material as a highly efficient and reusable sorbent for organic solvents. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01405b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A robust, fluorine-free, superhydrophobic ZIF-POSS hybrid material is prepared by a post-covalent reaction between ZIF-90 and POSS-NH2 via imine bond formation. The ZIF-POSS material is highly effective and reusable sorbent for organic solvents.
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Affiliation(s)
- Pushparaj Loganathan
- Department of Chemistry
- Faculty of Engineering and Technology
- SRM Institute of Science and Technology
- Kattankulathur-603203
- India
| | - Datta K. K. R.
- Department of Chemistry
- Faculty of Engineering and Technology
- SRM Institute of Science and Technology
- Kattankulathur-603203
- India
| | - Swaminathan Shanmugan
- Department of Chemistry
- Faculty of Engineering and Technology
- SRM Institute of Science and Technology
- Kattankulathur-603203
- India
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8
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Loganathan P, Pillai RS, Jeevananthan V, David E, Palanisami N, Bhuvanesh NSP, Shanmugan S. Assembly of discrete and oligomeric structures of organotin double-decker silsesquioxanes: inherent stability studies. NEW J CHEM 2021. [DOI: 10.1039/d1nj03128g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Discrete and oligomeric organotin DDSQs have been synthesized and characterized, both experimentally and through computational study. The stability of these compounds remains intrigued with the organization of their structure in the crystal lattice.
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Affiliation(s)
- Pushparaj Loganathan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India
| | - Renjith S. Pillai
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India
- Department of Chemistry, Christ University, Bangalore-56029, Karnataka, India
| | - Velusamy Jeevananthan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India
| | - Ezhumalai David
- Centre for Functional Materials, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India
| | - Nallasamy Palanisami
- Centre for Functional Materials, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India
| | - Nattamai S. P. Bhuvanesh
- X-ray Diffraction Laboratory, Department of Chemistry, Texas A&M University, College Station, TX 77842, USA
| | - Swaminathan Shanmugan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India
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9
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Li S, Zhao X, Zhang Y, Yang X, Yu R, Zhang Y, Deng K, Huang W. A facile approach to prepare cage‐ladder‐structure phosphorus‐containing amino‐functionalized
POSS
for enhancing flame retardancy of epoxy resins. J Appl Polym Sci 2020. [DOI: 10.1002/app.49870] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shengnan Li
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
- Analytical Science and Technology Laboratory of Hebei Province, College of Chemistry and Environmental Science Hebei University Baoding China
| | - Xiaojuan Zhao
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
| | - Yu Zhang
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
| | - Xin Yang
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
| | - Ran Yu
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
| | - Ying Zhang
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
| | - Kuilin Deng
- Analytical Science and Technology Laboratory of Hebei Province, College of Chemistry and Environmental Science Hebei University Baoding China
| | - Wei Huang
- Laboratory of Advanced Polymeric Materials, Institute of Chemistry Chinese Academy of Sciences Beijing China
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10
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Petkowski JJ, Bains W, Seager S. On the Potential of Silicon as a Building Block for Life. Life (Basel) 2020; 10:E84. [PMID: 32532048 PMCID: PMC7345352 DOI: 10.3390/life10060084] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 12/21/2022] Open
Abstract
Despite more than one hundred years of work on organosilicon chemistry, the basis for the plausibility of silicon-based life has never been systematically addressed nor objectively reviewed. We provide a comprehensive assessment of the possibility of silicon-based biochemistry, based on a review of what is known and what has been modeled, even including speculative work. We assess whether or not silicon chemistry meets the requirements for chemical diversity and reactivity as compared to carbon. To expand the possibility of plausible silicon biochemistry, we explore silicon's chemical complexity in diverse solvents found in planetary environments, including water, cryosolvents, and sulfuric acid. In no environment is a life based primarily around silicon chemistry a plausible option. We find that in a water-rich environment silicon's chemical capacity is highly limited due to ubiquitous silica formation; silicon can likely only be used as a rare and specialized heteroatom. Cryosolvents (e.g., liquid N2) provide extremely low solubility of all molecules, including organosilicons. Sulfuric acid, surprisingly, appears to be able to support a much larger diversity of organosilicon chemistry than water.
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Affiliation(s)
- Janusz Jurand Petkowski
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
| | - William Bains
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
| | - Sara Seager
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
- Department of Physics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
- Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
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11
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Shimojima A, Kuroda K. Alkoxy- and Silanol-Functionalized Cage-Type Oligosiloxanes as Molecular Building Blocks to Construct Nanoporous Materials. Molecules 2020; 25:molecules25030524. [PMID: 31991787 PMCID: PMC7038179 DOI: 10.3390/molecules25030524] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 01/21/2023] Open
Abstract
Siloxane-based materials have a wide range of applications. Cage-type oligosiloxanes have attracted significant attention as molecular building blocks to construct novel siloxane-based nanoporous materials with promising applications such as in catalysis and adsorption. This paper reviews recent progress in the preparation of siloxane-based nanoporous materials using alkoxy- and silanol-functionalized cage siloxanes. The arrangement of cage siloxanes units is controlled by various methods, including amphiphilic self-assembly, hydrogen bonding of silanol groups, and regioselective functionalization, toward the preparation of ordered nanoporous siloxane-based materials.
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Affiliation(s)
- Atsushi Shimojima
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo 169-0051, Japan
- Correspondence: (A.S.); (K.K.)
| | - Kazuyuki Kuroda
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo 169-0051, Japan
- Correspondence: (A.S.); (K.K.)
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12
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Sabirov DS, Shepelevich IS. A theoretical study of hypothetical silicon analogs of simplest saccharide molecules. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.112608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Li Y, Cui C. Cesium Carbonate-Catalyzed Oxidation of Substituted Phenylsilanes for the Efficient Synthesis of Polyhedral Oligomeric Silsesquioxanes. Inorg Chem 2018; 57:13477-13485. [DOI: 10.1021/acs.inorgchem.8b02107] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yuefeng Li
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, P. R. China
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14
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Schäfer S, Kickelbick G. Simple and high yield access to octafunctional azido, amine and urea group bearing cubic spherosilicates. Dalton Trans 2018; 46:221-226. [PMID: 27924976 DOI: 10.1039/c6dt03872g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spherosilicates and polyhedral oligomeric silsesquioxanes represent unique well-defined rigid building blocks for molecular and hybrid materials. Drawbacks in their synthesis are often low yields and the restricted presence of functional groups either based on incomplete transformation of all corners or the reactivity of the functional groups. Particularly amine-functionalization reveals some synthetic challenges. In this study we report the synthesis of a new class of octafunctionalized hydrogen bond forming spherosilicates via a facile route based on octabromo alkyl functionalized cubic spherosilicates. Four different alkyl chain lengths, namely C4, C5, C6 and C11, were realized starting from ω-alkenylbromides via hydrosilylation of Q8M8H. Using sodium azide in a mixture of acetonitrile : DMF = 10 : 1, the octaazide was obtained quantitatively and could be rapidly transformed in an octaamine cube via catalytic hydrogenation over Pd/C in absolute ethanol. The following reaction to hydrogen bond forming spherosilicates was performed in situ by adding propyl isocyanate. All transformations proceed quantitatively at the eight corners of the cube, which was evidenced by NMR spectroscopy and ESI-MS measurements. The Q8-target compound can be separated after each reaction step over simple chemical workup while no cage rearrangement was observed. The structures were confirmed using 1H, 13C, 29Si-NMR, FT-IR, elemental analysis and ESI-MS. The method opens a high yield route (overall isolated yield 83-88%) for structural building blocks in hybrid materials.
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Affiliation(s)
- Sandra Schäfer
- Inorganic Solid State Chemistry, Saarland University, Am Markt, Zeile 3, 66125 Saarbrücken, Germany.
| | - Guido Kickelbick
- Inorganic Solid State Chemistry, Saarland University, Am Markt, Zeile 3, 66125 Saarbrücken, Germany. and INM - Leibniz-Institut für Neue Materialien GmbH, Campus D2 2, 66123 Saarbrücken, Germany
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15
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Valentini L, Bittolo Bon S, Pugno NM. Ice-regenerated flame retardant and robust film of Bombyx mori silk fibroin and POSS nano-cages. RSC Adv 2018; 8:9063-9069. [PMID: 35541884 PMCID: PMC9078597 DOI: 10.1039/c7ra13708g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 02/13/2018] [Indexed: 11/21/2022] Open
Abstract
In this study, we present a simple method to prepare and control the structure of regenerated hybrid silkworm silk films through icing.
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Affiliation(s)
- Luca Valentini
- Dipartimento di Ingegneria Civile e Ambientale
- Università di Perugia
- UdR INSTM
- 05100 Terni
- Italy
| | - Silvia Bittolo Bon
- Dipartimento di Ingegneria Civile e Ambientale
- Università di Perugia
- UdR INSTM
- 05100 Terni
- Italy
| | - Nicola M. Pugno
- Laboratory of Bio-Inspired and Graphene Nanomechanics
- Department of Civil
- Environmental and Mechanical Engineering
- University of Trento
- Trento
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16
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Prabu R, Peramaiah K, Palanisami N, Pescarmona PP, Neppolian B, Shanmugan S. Non-covalent polyhedral oligomeric silsesquioxane-polyoxometalates as inorganic–organic–inorganic hybrid materials for visible-light photocatalytic splitting of water. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00449h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrophilic to hydrophobic conversion of polyoxometalate by integration of POSS-NH2via non-covalent interactions for sustainable photocatalytic hydrogen production reactions.
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Affiliation(s)
- Rajendran Prabu
- Department of Chemistry
- SRM Institute of Science and Technology
- Kancheepuram 603203
- India
- SRM Research Institute
| | - Karthik Peramaiah
- SRM Research Institute
- SRM Institute of Science and Technology
- Kancheepuram 603203
- India
| | - Nallasamy Palanisami
- Department of Chemistry
- School of Advanced Sciences
- Vellore Institute of Technology
- Vellore 632014
- India
| | - Paolo P. Pescarmona
- Chemical Engineering Group
- Engineering and Technology Institute Groningen (ENTEG)
- University of Groningen
- 9747AG Groningen
- The Netherlands
| | | | - Swaminathan Shanmugan
- Department of Chemistry
- SRM Institute of Science and Technology
- Kancheepuram 603203
- India
- SRM Research Institute
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17
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Tonello S, Carniato F, Rizzi M, Migliario M, Rocchetti V, Marchese L, Renò F. Charged polyhedral oligomeric silsesquioxanes trigger in vitro METosis via both oxidative stress and autophagy. Life Sci 2017; 190:58-67. [DOI: 10.1016/j.lfs.2017.09.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/19/2017] [Accepted: 09/27/2017] [Indexed: 12/21/2022]
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18
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Janeta M, Szafert S. Synthesis, characterization and thermal properties of T8 type amido-POSS with p-halophenyl end-group. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Kawakami Y, Seino H, Ohtaki K, Kabe Y. Synthetic application of silicates/silanolates and their hydrolyzed polysilanol siloxanes for polyhedral oligomeric silsesquioxanes (POSSs). HETEROATOM CHEMISTRY 2017. [DOI: 10.1002/hc.21373] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yoshiteru Kawakami
- Department of Chemistry; Faculty of Science; Kanagawa University; Hiratsuka Japan
| | - Hirofumi Seino
- Department of Chemistry; Faculty of Science; Kanagawa University; Hiratsuka Japan
| | - Kazushi Ohtaki
- Department of Chemistry; Faculty of Science; Kanagawa University; Hiratsuka Japan
| | - Yoshio Kabe
- Department of Chemistry; Faculty of Science; Kanagawa University; Hiratsuka Japan
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20
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Dumitriu AC, Balan M, Bargan A, Shova S, Varganici CD, Cazacu M. Synthesis of functionalized silica nanostructure: Unexpected conversion of cyanopropyl group in chloropropyl one during HCl-catalysed hydrolysis of the corresponding triethoxysilane. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.01.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Fukuda Y, Kajihara K, Kakinoki S, Jang J, Yoshida H, Kanamura K. Poly(n-alkylsilsesquioxane) liquids prepared by cosolvent-free hydrolytic polycondensation of n-alkyltrialkoxysilanes: effects of liquid–liquid phase separation during aging and alkyl chain length on structure and viscosity. Dalton Trans 2016; 45:15532-15540. [DOI: 10.1039/c6dt02647h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trimetoxy- and triethoxysilanes with the same n-alkyl groups yield polysilsesquioxane liquids of similar properties by cosolvent-free hydrolytic polycondensation via aging.
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Affiliation(s)
- Yuko Fukuda
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - Koichi Kajihara
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - Shiori Kakinoki
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - Junhyeok Jang
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - Hirohisa Yoshida
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - Kiyoshi Kanamura
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
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22
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Sakuragi A, Igarashi Y, Kajihara K, Kanamura K. Synthesis of silanol-rich long-life polysilsesquioxane liquids by cosolvent-free hydrolytic polycondensation of organotrimethoxysilanes followed by aging. Dalton Trans 2016; 45:3151-7. [DOI: 10.1039/c5dt04611d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silanol-rich polysilsesquioxane liquids with long-term viscosity stability are formed in a facile manner from organotrimethoxysilane–water binary systems via aging.
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Affiliation(s)
- Arata Sakuragi
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Yuta Igarashi
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Koichi Kajihara
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Kiyoshi Kanamura
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
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23
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do Carmo DR, Silvestrini DR, da Silveira TF, Cumba LR, Dias Filho NL, Soares LA. Silsesquioxane organofunctionalized with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole: Preparation and subsequent reaction with silver and potassium hexacyanoferrate(III) for detection of l-cysteine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 57:24-30. [DOI: 10.1016/j.msec.2015.07.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 05/30/2015] [Accepted: 07/10/2015] [Indexed: 10/23/2022]
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24
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Marchesi S, Carniato F, Palin L, Boccaleri E. POSS as building-blocks for the preparation of polysilsesquioxanes through an innovative synthetic approach. Dalton Trans 2015; 44:2042-6. [PMID: 25515033 DOI: 10.1039/c4dt02887b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel solvent-free solid-state synthesis was used to prepare a non-crystalline polysilsesquioxane sample, with a peculiar viscous form. The material was synthesized through direct self-condensation of a partially condensed polyhedral oligomeric silsesquioxane (POSS) and its physico-chemical properties, in terms of composition/structure, thermal stability and hydrophobicity, were investigated.
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Affiliation(s)
- Stefano Marchesi
- Dipartimento di Scienze e Innovazione Tecnologica, Centro Interdisciplinare NanoSistemi, Universita` del Piemonte Orientale "Amedeo Avogadro", Viale Teresa Michel 11, 15121 Alessandria, Italy.
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25
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Jiang Y, Wan QH. Separation and identification of oligomeric phenylethoxysiloxanols by liquid chromatography-electrospray ionization mass spectrometry. J Chromatogr A 2015; 1394:95-102. [PMID: 25843423 DOI: 10.1016/j.chroma.2015.03.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Revised: 03/09/2015] [Accepted: 03/17/2015] [Indexed: 11/26/2022]
Abstract
Liquid chromatography-electrospray ionization mass spectrometry has been applied to qualitative analysis of oligomeric phenylethoxysiloxanols, a class of organosilanols as active intermediates to polyhedral silsesquioxanes. The phenylethoxysiloxanol samples were prepared by controlled acid-catalyzed hydrolysis and condensation of phenyltriethoxysilane at various molar equivalents of water (r1) and characterized by standard spectroscopic techniques. Using a gradient binary water-methanol mobile phase, these reaction products were resolved on octadecylsiloxane silica stationary phase and subsequently identified by online electrospray ionization mass spectrometric detection. Results show that the reaction products are composed of a multitude of linear and monocyclic siloxanol oligomers with various numbers of silicon atoms and hydroxyl groups, depending upon the reaction conditions used. With the r1 value increasing from 0.5 to 2.0, the chain lengths of the oligomers increase slightly but the numbers of hydroxyl groups increase considerably, accompanying by structural evolution from chains to rings. Characterization of the retention behavior of these oligomers indicates that hydrophobic interactions of phenyl and ethoxy groups with the stationary phase are responsible for their retention in reversed-phase liquid chromatography.
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Affiliation(s)
- Yuting Jiang
- School of Pharmaceutical Science & Technology, Tianjin University, Tianjin 900032, China
| | - Qian-Hong Wan
- School of Pharmaceutical Science & Technology, Tianjin University, Tianjin 900032, China.
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26
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Grala M, Bartczak Z. Morphology and mechanical properties of high density polyethylene-POSS hybrid nanocomposites obtained by reactive blending. POLYM ENG SCI 2014. [DOI: 10.1002/pen.24048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Magdalena Grala
- Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
| | - Zbigniew Bartczak
- Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
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27
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Preparation of a novel pH-sensitive hydrogel based on acrylic acid and polyhedral oligomeric silsesquioxane for controlled drug release of theophylline. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1161-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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28
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Wang T, Ding J, Li J, Liu Y, Hao J. Blends of poly(d,l-lactide) with polyhedral oligomeric silsesquioxanes-based biodegradable polyester: Synthesis, morphology, miscibility, and mechanical property. J Appl Polym Sci 2014. [DOI: 10.1002/app.40776] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tianqiang Wang
- State Key Lab of Electronic Films and Integrated Devices; School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China; Chengdu 610054 Sichuan People's Republic of China
| | - Jing Ding
- State Key Lab of Electronic Films and Integrated Devices; School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China; Chengdu 610054 Sichuan People's Republic of China
| | - Jiamin Li
- State Key Lab of Electronic Films and Integrated Devices; School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China; Chengdu 610054 Sichuan People's Republic of China
| | - Yu Liu
- State Key Lab of Electronic Films and Integrated Devices; School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China; Chengdu 610054 Sichuan People's Republic of China
| | - Jianyuan Hao
- State Key Lab of Electronic Films and Integrated Devices; School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China; Chengdu 610054 Sichuan People's Republic of China
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29
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Ir-catalyzed hydrosilylation reaction of allyl acetate with octakis(dimethylsiloxy)octasilsesquioxane and related hydrosilanes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.11.035] [Citation(s) in RCA: 13] [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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30
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Marchesi S, Carniato F, Boccaleri E. Synthesis and characterisation of a novel europium(iii)-containing heptaisobutyl-POSS. NEW J CHEM 2014. [DOI: 10.1039/c4nj00157e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Eu(iii)-containing POSS with good light quantum efficiency and high photostability was designed and characterized by a multidisciplinary approach.
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Affiliation(s)
- Stefano Marchesi
- Dipartimento di Scienze e Innovazione Tecnologica
- Centro Interdisciplinare NanoSistemi
- Università del Piemonte Orientale
- 15121 Alessandria, Italy
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica
- Centro Interdisciplinare NanoSistemi
- Università del Piemonte Orientale
- 15121 Alessandria, Italy
| | - Enrico Boccaleri
- Dipartimento di Scienze e Innovazione Tecnologica
- Centro Interdisciplinare NanoSistemi
- Università del Piemonte Orientale
- 15121 Alessandria, Italy
- 6 – 28100 Novara, Italy
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31
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Liu LK, Dare EO. Octasilsesquioxane Chemistry II. Hydrosilylation Reaction of Octa(hydrido)silsesquioxane with Unsaturated Substrates and Product Properties. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200400026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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32
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Liu LK, Chu JB, Slanina Z, Chow TJ. Octasilsesquioxane Chemistry I. Attachment of Four Surface Bridges to Octasilsesquioxane Quasi-cube Framework. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200200133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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The effects of solvent and initiator on anionic ring opening polymerization of ϵ-caprolactone: synthesis and characterization. POLYM INT 2013. [DOI: 10.1002/pi.4531] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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34
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Renò F, Carniato F, Rizzi M, Olivero F, Pittarella P, Marchese L. Flow cytometry evidence of human granulocytes interaction with polyhedral oligomeric silsesquioxanes: effect of nanoparticle charge. NANOTECHNOLOGY 2013; 24:185101. [PMID: 23574975 DOI: 10.1088/0957-4484/24/18/185101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanoparticles (NPs) entering the human body are immediately confronted with the innate part of human immune system. In particular, monocyte and neutrophil granulocytes readily clear particles by phagocytosis, even if in the case of NPs the uptake mechanism may be classified as macropinocytosis. Among engineered nanoparticles, in the last years, siliceous materials have emerged as promising materials for several applications ranging from catalysis to biomedical. The polyhedral oligomeric silsesquioxanes (POSS) are nanodimensional, easily synthesizable molecular compounds and POSS-based systems are promising carriers for biological molecules. In this work, the ability of human granulocytes to uptake positively and negatively charged POSS was measured using a simple flow cytometry analysis based on cell size modifications. The data obtained showed that after a 30 min exposure only positive NPs were uptaken by human granulocyte using both macropinocytosis and clathrin-mediated mechanisms as demonstrated by uptake inhibition mediated by amiloride and chlorpromazine.
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Affiliation(s)
- Filippo Renò
- Innovative Research Laboratory for Wound Healing, Health Sciences Department, University of Eastern Piedmont A. Avogadro, via Solaroli, 17 I-28100 Novara, Italy.
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35
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Hu J, Li L, Zhang S, Gong L, Gong S. Novel phenyl-POSS/polyurethane aqueous dispersions and their hybrid coatings. J Appl Polym Sci 2013. [DOI: 10.1002/app.39303] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jiankun Hu
- College of Chemistry and Molecular Sciences, Wuhan University; Wuhan; 430072; China
| | - Lian Li
- College of Chemistry and Molecular Sciences, Wuhan University; Wuhan; 430072; China
| | - Siwei Zhang
- College of Chemistry and Molecular Sciences, Wuhan University; Wuhan; 430072; China
| | - Linbo Gong
- College of Chemistry and Molecular Sciences, Wuhan University; Wuhan; 430072; China
| | - Shuling Gong
- College of Chemistry and Molecular Sciences, Wuhan University; Wuhan; 430072; China
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36
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Padělková Z, Švec P, Kampová H, Sýkora J, Semler M, Štěpnička P, Bakardjieva S, Willem R, Růžička A. Unusual Reactivity of a C,N-Chelated Stannylene with Siloxanes and Silanols. Organometallics 2013. [DOI: 10.1021/om400123y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zdeňka Padělková
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice,
Czech Republic
| | - Petr Švec
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice,
Czech Republic
| | - Hana Kampová
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice,
Czech Republic
| | - Jan Sýkora
- Institute of Chemical Process Fundamentals of the Academy of Sciences of the Czech Republic, Rozvojova 2/135, CZ-165 02 Prague 6−Suchdol, Czech Republic
| | - Miloslav Semler
- Department of Inorganic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague, Czech Republic
| | - Petr Štěpnička
- Department of Inorganic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague, Czech Republic
| | - Snejana Bakardjieva
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Rudolph Willem
- Department of Materials and
Chemistry, High Resolution NMR Centre, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Aleš Růžička
- Department of General and Inorganic
Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice,
Czech Republic
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37
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Using silane coupling agents to prepare raspberry-shaped polyaniline hollow microspheres with tunable nanoshell thickness. J Colloid Interface Sci 2013; 394:36-43. [DOI: 10.1016/j.jcis.2012.11.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 10/28/2012] [Accepted: 11/10/2012] [Indexed: 10/27/2022]
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38
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Determination of Copper in Different Ethanolic Matrices Using a Chloropropyl Silica Gel Modified with a Nanostructured Cubic Octa(3-aminopropyl)octasilsesquioxane. J CHEM-NY 2013. [DOI: 10.1155/2013/509341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The chloropropyl silica gel was modified with octa(3-aminopropyl)octasilsesquioxane and characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), spectroscopies, and surface and area porosity. The specific sorption capacity of metallic ions (Cu2+and Ni2+) increases in the following solvent order: water<ethanol 42%<ethanol<ketone. The high values of the constant (K) in the order of 103 L mol−1suggested the high adsorbent capacity of the modified silica (SGAPC) for Cu2+and Ni2+. SGAPC was applied to a separation column and shows recoveries of around 100% of copper in samples of sugar cane spirit, vodka, ginger brandy, and ethanol fuel.
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39
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Wada Y, Iyoki K, Sugawara-Narutaki A, Okubo T, Shimojima A. Diol-Linked Microporous Networks of Cubic Siloxane Cages. Chemistry 2012. [DOI: 10.1002/chem.201202883] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Wakabayashi R, Tamai M, Kawahara K, Tachibana H, Imamura Y, Nakai H, Kuroda K. Direct alkoxysilylation of alkoxysilanes for the synthesis of explicit alkoxysiloxane oligomers. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.05.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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41
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Valentini L, Cardinali M, Kenny JM, Prato M, Monticelli O. A Photoresponsive Hybrid Nanomaterial Based on Graphene and Polyhedral Oligomeric Silsesquioxanes. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200260] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Yanagisawa Y, Yamaguchi H, Nishiyama Y, Morimoto T, Kakiuchi K, Tabata K, Tsutsumi K. Synthesis and evaluation of a chiral menthol functionalized silsesquioxane: application to diastereoselective [2+2] photocycloaddition. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0635-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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43
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Blanco I, Abate L, Bottino FA, Bottino P. Thermal degradation of hepta cyclopentyl, mono phenyl-polyhedral oligomeric silsesquioxane (hcp-POSS)/polystyrene (PS) nanocomposites. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.03.041] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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44
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Wada K, Sakugawa S, Inoue M. Facile preparation of silica-supported Ti catalysts effective for the epoxidation of cyclooctene using Ti-bridged silsesquioxanes. Chem Commun (Camb) 2012; 48:7991-3. [DOI: 10.1039/c2cc33571a] [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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45
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Valentini L, Bon SB, Monticelli O, Kenny JM. Deposition of amino-functionalized polyhedral oligomeric silsesquioxanes on graphene oxide sheets immobilized onto an amino-silane modified silicon surface. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16111g] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Olivero F, Renò F, Carniato F, Rizzi M, Cannas M, Marchese L. A novel luminescent bifunctional POSS as a molecular platform for biomedical applications. Dalton Trans 2012; 41:7467-73. [DOI: 10.1039/c2dt30218g] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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47
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Characterization and Some Insights into the Reaction Chemistry of Polymethylsilsesquioxane or Methyl Silicone Resins. INT J POLYM SCI 2012. [DOI: 10.1155/2012/526795] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Structural characterization of a polymethylsilsesquioxane (PMSQ) and a DT-type methyl silicone resin (MeDT) has been carried out by various instrumental analyses including GPC, NMR, gas chromatography, and gas chromatography-mass spectrometry. Although the PMSQ had aMwaround 5000, the resin contained a significant amount of low molecular weight species consisting of T2[MeSi(OH)O2/2] and T3[MeSiO3/2] units, ranging from to including many isomers. One isomer of was isolated of which structure was determined as a cage structure. The species are supposed to consist mainly of cyclotetra- and cyclopentasiloxanes, but presence of strained rings such as cyclotrisiloxane rings also was suggested. In MeDT, species in which the T2units in the molecules from PMSQ is replaced with D2[Me2SiO2/2] were found, for example, , suggesting that general silicone resins consist of similar structures as silsesquioxanes. The Mark-Houwink exponent for these methyl resins was~0.3, indicating the molecular shape to be compact. Investigation on the formation chemistry of the cubic octamers indicates that siloxane bond rearrangement is an important mechanism in the molecule build-up process.
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48
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Yang XH, Giovenzana T, Feild B, Jabbour GE, Sellinger A. Solution processeable organic–inorganic hybrids based on pyrene functionalized mixed cubic silsesquioxanes as emitters in OLEDs. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31194a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Hoyos M, Fina A, Carniato F, Prato M, Monticelli O. Novel hybrid systems based on poly(propylene-g-maleic anhydride) and Ti-POSS by direct reactive blending. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.07.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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50
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Obrezkova MA, Rogul’ GS, Vasilenko NG, Demchenko NV, Muzafarov AM. Synthesis of linear poly(sodiumoxy)methylsilsesquioxanes and their functional and nonfunctional derivatives. DOKLADY CHEMISTRY 2011. [DOI: 10.1134/s0012500808030075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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