Synthesis and Characterization of High Refractive Index MT Siloxane Oligomers

Cai, Haitao; Zhang, Liping; Xiong, Ying; Qu, Qiongli; Tang, Hongding

doi:10.1007/s10904-014-0039-7

Cited by 8 publications

(3 citation statements)

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“…Previously, the synthesis of oligomeric phthalimide-functionalized silsesquioxanes obtained via the reaction of nucleophilic substitution of the chlorine atom in octakis(3-chloropropyl)octasilsesquioxane with a phthalimide group in DMF was reported [ 39 ]. Mono- and trifunctional siloxane oligomers were prepared via the reaction of the N-3-(trimethoxysilylpropyl)phthalimide with hexamethyldisiloxane or divinyltetramethyldisiloxane in the presence of methanol and HCl [ 40 ]. Kaneko et al reported the synthesis of polysilsesquioxane containing phthalimide groups via the two-step modification of ammonium-group-containing polysilsesquioxane [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Soluble Polysilsesquioxane with Phthalimide Groups

Emel’yanov,

Bolgova,

Trofimova

et al. 2023

IJMS

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Soluble polysilsesquioxane containing side-chain phthalimide groups (PSQ-PhI) was synthesized via a solvent- and catalyst-free hydrolytic polycondensation reaction using 2-[3-(triethoxysilyl)propyl]-1H-isoindole-1,3(2H)-dione. The composition and structure of polysilsesquioxane was confirmed via 1H, 13C, and 29Si NMR spectroscopy, Fourier transform infrared spectroscopy, gel permeation chromatography, thermogravimetric analysis, dynamic light scattering, X-ray diffraction analysis, and elemental analysis. The synthesized silsesquioxane showed a monomodal molecular weight distribution. The average molecular weight of polysilsesquioxane is 11,200 Da, and the polydispersity index is 1.10. 29Si NMR analysis showed a half-peak width w1/2 3.1 ppm at δ −68.3, which corresponds to the PhI(CH2)3SiO3/2 unit and indicates an ordered structure in the polymer, with some defects caused by the presence of uncondensed silanol groups. PSQ-PhI showed good thermal stability (Td5% decomposition at 345 °C). The polysilsesquioxane-based coating was transparent in the visible region.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis of Soluble Polysilsesquioxane with Phthalimide Groups

Emel’yanov,

Bolgova,

Trofimova

et al. 2023

IJMS

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“…[1][2][3][4][5][6] With the increasing demands for high performance in these applications, enhanced refractive index materials are strongly desired. [9][10][11] Besides the strategy of incorporating high molar refractions organic groups, embedding high refractive index inorganic nanoparticles (NPs) (PbS, 12,13 ZnS, [14][15][16][17] TiO 2 , 18-21 ZrO 2 , [22][23] GNPs (graphene naoparticles), 24 Si NPs, 25,26 ) into the organic matrices has been confirmed another effective method of increasing refractive index. [6][7][8] Scientists have long-standing enthusiasm in the development of increasing the refractive index by introducing highly polarizable heteroatoms or rigid aromatic moieties into the side chain of the silicone polymers, but the refractive index of these novel silicone polymers remain stay in a relative small adjustable range of 1.54-1.60 which are still not meeting the rapid development of the technologies.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] Scientists have long-standing enthusiasm for the development of increased refractive indices by introducing highly polarizable heteroatoms or rigid aromatic moieties into the side chains of silicone polymers, but the refractive indices of these novel silicone polymers remain in a relatively small adjustable range of 1.54-1.60, which still does not meet the requirements of rapidly developing technologies. [9][10][11] Besides the strategy of incorporating high molar refraction organic groups, embedding high refractive index inorganic nanoparticles (NPs) (PbS, 12,13 ZnS, [14][15][16][17] TiO 2 , [18][19][20][21] ZrO 2 , 22,23 GNPs (graphene nanoparticles), 24 Si NPs 25,26 ) into organic matrices has been conrmed to be another effective method for increasing the refractive index. For instance, the introduction of PbS particles in an organic matrix can increase the refractive index to a value of 2.5-3.0 at 632.8 nm, rendering the nanocomposite a suitable material for optical applications such as the manufacture of improved efficiency solar cells.…”

Section: Introductionmentioning

confidence: 99%

Effective increase in the refractive index of novel transparent silicone hybrid films by introduction of functionalized silicon nanoparticles

et al. 2015

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Ordered Hybrid Micro/Nanostructures and Their Optical Applications

Zhang

Yang

2019

Advanced Optical Materials

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known that the optical properties related refractive index is an important parameter for ordered micro/nanostructures. Commonly, organic substances own lower refraction. Aiming at improving which, researchers introduce highly polarizable heteroatoms or rigid aromatic moieties. However, the maximum of refractive index is limited to 1.54-1.60, [3] which is far from the requirements of rapidly developing technologies. [4] Incorporation of inorganic materials with relative higher refractive index (TiO 2 , ZnO, ZnS, graphene nanoparticles, and Si) into an organic matrix is capable of enlarging the optical parameters to a great extent, generally up to a value of 2.5-3.0, [5] which offers more chances for the fabrication of novel ordered micro/nanostructures. Photonic crystals (PCs), for example, regularly arrange materials of high and low dielectric constants on the order of the wavelength of light. The photonic bandgap (PBG) prohibiting the propagation of light results from the sufficient dielectric contrast and appropriate geometry. The structural color therefore generates. Manipulating the propagation of light via micro/nanostructures meets the requirements for modern optical devices. [6] As a result, more efforts have been applied to devices consisting of micro/nanostructures of multiple materials, such as synthetic materials and biomaterials. [7] Besides optical properties, the strength and toughness of ordered micro/nanostructures are also improved based on the hybrid material. Meanwhile, the electric and magnetic features of inorganic dopants can also exactly assist the adjustability. Therefore, the hybrid can significantly improve performance compared with its constituent.This review emphasizes on applications sought (sensing, imaging, communication, photoelectricity, etc.), the materials used (silicon, metals, polymers, etc.), and the preparation methods employed (patterning, etching, deposition, etc.). We present an attempt to classify and compare some intensively reported micro/nanostructures of hybrid materials and/or heterogeneous structures, along with recent important developments in literatures. It is organized as follows: First, we summarize some fundamental physical principles and concepts in brief. Second, we particularly highlight artificial and natural laminar structures, represented by Bragg stacks (BSs) and butterfly wings, which have drawn much attention in the latest literatures. Next, the focus shifts to the preparation routes and materials adoption of colloidal crystals and their derived periodic arrays. A few examples of highly functional materials Recent advances in manufacturing and technology of ordered hybrid micro/ nanostructures have acquired many breakthroughs. With the aid of the cooperation of various materials, the ordered hybrid micro/nanostructures exhibit high-quality performance and mechanical stability and allow the modulation on the light-matter interaction in a controllable manner, thereby enabling a wide variety of innovative applications. This article reviews recent deve...

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Synthesis and Characterization of High Refractive Index MT Siloxane Oligomers

Cited by 8 publications

References 10 publications

Green Synthesis of Soluble Polysilsesquioxane with Phthalimide Groups

Green Synthesis of Soluble Polysilsesquioxane with Phthalimide Groups

Effective increase in the refractive index of novel transparent silicone hybrid films by introduction of functionalized silicon nanoparticles

Ordered Hybrid Micro/Nanostructures and Their Optical Applications

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