scholarly journals High Refractive-Index Hybrids Consisting of Water-Soluble Matrices with Bipyridine-Modified Polyhedral Oligomeric Silsesquioxane and Lanthanoid Cations

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1560
Author(s):  
Kazunari Ueda ◽  
Takahiro Kakuta ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Refractive Index ◽  
Dicarboxylic Acid ◽  
Metal Ion ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
High Refractive Index ◽  
Water Soluble ◽  
Feed Ratio ◽  
Variable Cross ◽  
Aqueous Mixtures ◽  
Oligomeric Silsesquioxane

We report high refractive-index (RI) films composed of polyhedral oligomeric silsesquioxane (SSQ) matrices and various lanthanoid cations. The SSQ matrices were constructed from octaammonium SSQ by connecting with bipyridine dicarboxylic acid, which is expected to capture cations. By modulating the feed ratio between SSQ and dicarboxylic acid, the series of the SSQ matrices were obtained with variable cross-linking ratios among the SSQ units. Thin transparent films were able to be prepared through the drop-casting method with the aqueous mixtures containing SSQ matrices and various kinds of lanthanoid salts up to 40 wt %. From RI measurements, it was revealed that the increase of the amount of the metal ion can significantly lift up the RI values. In particular, critical losses of Abbe numbers, which theoretically have the trade-off relationship toward increases in RI values, were hardly detected. This effect could be obtained by cation assembly in local spots that are assisted by SSQ.

A thermally stable and reversible microporous hydrogen-bonded organic framework: aggregation induced emission and metal ion-sensing properties

2015 ◽  
Vol 3 (45) ◽  
pp. 11874-11880 ◽  
Author(s):  
Hui Zhou ◽  
Qun Ye ◽  
Xiangyang Wu ◽  
Jing Song ◽  
Ching Mui Cho ◽  
...  
Keyword(s):  
Metal Ion ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Thermally Stable ◽  
Aggregation Induced Emission ◽  
Sensing Properties ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Oligomeric Silsesquioxane ◽  
Organic Framework ◽  
Hydrogen Bonded

A hydrogen-bonded organic framework derived from a polyhedral oligomeric silsesquioxane and an aggregation-induced emission luminogen tetraphenylethene derivative was reported.

An optical sensor for discriminating the chemical compositions and sizes of plastic particles in water based on water-soluble networks consisting of polyhedral oligomeric silsesquioxane presenting dual-color luminescence

2019 ◽  
Vol 3 (12) ◽  
pp. 2690-2695 ◽  
Author(s):  
Ryota Nakamura ◽  
Hayato Narikiyo ◽  
Masayuki Gon ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Optical Sensor ◽  
Color Change ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Water Soluble ◽  
Chemical Compositions ◽  
Dual Color ◽  
Water Based ◽  
Cross Linker ◽  
Oligomeric Silsesquioxane

Luminescent water-soluble networks containing coumarin were prepared using polyhedral oligomeric silsesquioxane (POSS) as a cross-linker, and plastic particles in water can be detected by luminescent color change.

scholarly journals Synthesis of emissive water-soluble network polymers based on polyhedral oligomeric silsesquioxane and their application as optical sensors for discriminating the particle size

2015 ◽  
Vol 3 (48) ◽  
pp. 12539-12545 ◽  
Author(s):  
Takahiro Kakuta ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Particle Size ◽  
Optical Sensors ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Silica Particles ◽  
Water Soluble ◽  
Hybrid Gels ◽  
Inorganic Hybrid ◽  
Emission Properties ◽  
Network Polymers ◽  
Oligomeric Silsesquioxane

We report organic–inorganic hybrid gels composed of polyhedral oligomeric silsesquioxane (POSS)-based network polymers and their variable emission properties depending on the size of coexisting silica particles (SPs).

Water soluble polyhedral oligomeric silsesquioxane based amphiphilic hybrid polymers: Synthesis, self-assembly, and applications

2016 ◽  
Vol 75 ◽  
pp. 67-92 ◽  
Author(s):  
Asad Ullah ◽  
Shakir Ullah ◽  
Gul Shehzada Khan ◽  
Syed Mujtaba Shah ◽  
Zakir Hussain ◽  
...  
Keyword(s):  
Self Assembly ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Water Soluble ◽  
Hybrid Polymers ◽  
Oligomeric Silsesquioxane

scholarly journals Fluoroalkyl POSS with Dual Functional Groups as a Molecular Filler for Lowering Refractive Indices and Improving Thermomechanical Properties of PMMA

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1332 ◽  
Author(s):  
Kazunari Ueda ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Refractive Index ◽  
Methyl Methacrylate ◽  
Functional Groups ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Thermomechanical Properties ◽  
Optical Measurements ◽  
Refractive Indices ◽  
Casting Method ◽  
Dual Functional ◽  
Oligomeric Silsesquioxane

The dual-functionalized polyhedral oligomeric silsesquioxane (POSS) derivatives, which have the seven fluorinated alkanes and the single acrylate ester on the silica cube, were designed as a filler for lowering the refractive index (RI) and improving thermomechanical properties in poly(methyl methacrylate) (PMMA). The desired dual-functionalized POSS fillers were prepared, and because of its high miscibility, homogeneous films were readily obtained, by the casting method, with the mixture solutions containing the modified POSS and the polymers. From optical measurements, it was found that the larger effects of lowering the RIs of the PMMA matrices were observed from the modified POSS than those of the octa-substituted POSS derivatives with the homogeneous substituents. It should be mentioned that the degradation temperatures and the storage moduli were able to be greatly elevated by loading the present POSS fillers. Finally, it was demonstrated that the methacrylate ester-tethered POSS should be the most effective filler for modulating PMMA (Δn = −0.020, ΔTd20 = +53 °C, ΔE'/E' = +72%).

Paclitaxel nano-conjugated to polyhedral oligomeric silsesquioxane (POSS) nanoparticles as a novel water-soluble prodrug

2021 ◽  
pp. 131013
Author(s):  
Jafar Rezie ◽  
Nasrollah Jabbari ◽  
Sadegh Asghari Kalashani ◽  
Esmaiel Jabbari ◽  
Ali Akbari
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Water Soluble ◽  
Oligomeric Silsesquioxane

scholarly journals Preparation of High Refractive Index Composite Films Based on Titanium Oxide Nanoparticles Hybridized Hydrophilic Polymers

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 514 ◽  
Author(s):  
Makoto Takafuji ◽  
Maino Kajiwara ◽  
Nanami Hano ◽  
Yutaka Kuwahara ◽  
Hirotaka Ihara
Keyword(s):  
Refractive Index ◽  
Titanium Oxide ◽  
Polymer Matrix ◽  
High Refractive Index ◽  
Inorganic Nanoparticles ◽  
Water Soluble ◽  
Hydrophilic Polymers ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Hydrogen Bond Formation

Optical materials with high refractive index (n) have been rapidly improved because of urgent demands imposed by the development of advanced photonic and electronic devices such as solar cells, light emitting diodes (LED and Organic LED), optical lenses and filters, anti-reflection films, and optical adhesives. One successful method to obtain high refractive index materials is the blending of metal oxide nanoparticles such as TiO2 and ZrO2 with high n values of 2.1–2.7 into conventional polymers. However, these nanoparticles have a tendency to agglomerate by themselves in a conventional polymer matrix, due to the strong attractive forces between them. Therefore, there is a limitation in the blending amount of inorganic nanoparticles. In this paper, various hydrophilic polymers such as poly(N-hydroxyl acrylamide) (pHEAAm), poly(vinyl alcohol), poly(ethylene glycol), and poly(acrylic acid) were examined for preparation of high refractive index film based on titanium oxide nanoparticle (TiNP) dispersed polymer composite. The hydrogen bonding sites in these hydrophilic polymers would improve the dispersibility of inorganic nanoparticles in the polymer matrix. As a result, pHEAAm exhibited higher compatibility with titanium oxide nanoparticles (TiNPs) than other water-soluble polymers. Transparent hybrid films were prepared by mixing pHEAAm with TiNPs and drop casting the mixture onto a glass plate. The refractive indices of the films were in good agreement with calculated values. The compatibility of TiNPs with pHEAAm was dependent on the surface characteristics of TiNPs. TiNPs with the highest observed compatibility could be hybridized with pHEAAm at concentrations of up to 90 wt%, and the refractive index of the corresponding film reached 1.90. The high compatibility of TiNPs with pHEAAm may be related to the hydrophilicity and amide and hydroxyl moieties of pHEAAm, which cause hydrogen bond formation on the TiO2 surface. The obtained thin film was slightly yellow due to the color of the original TiNP dispersion; however, the transmittance of the film was higher than 80% in the wavelength range from 480 to 900 nm.

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