scholarly journals A Selenone-Functionalized Polyhedral Oligomeric Silsesquioxane for Selective Detection and Adsorption of Hg2+ ions in Aqueous Solutions

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2084 ◽  
Author(s):  
Hailong Liu ◽  
Zixu Chen ◽  
Shengyu Feng ◽  
Dengxu Wang ◽  
Hongzhi Liu
Keyword(s):  
Aqueous Solutions ◽  
Acid Treatment ◽  
Color Change ◽  
Limit Of Detection ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Functional Materials ◽  
29Si Nmr ◽  
Highly Sensitive ◽  
Ft Ir ◽  
Oligomeric Silsesquioxane

Developing novel functional polyhedral oligomeric silsesquioxane (POSS) for various applications is highly desirable. Herein we present the first example of a novel selenone-functionalized POSS (POSS-Se) by treating an imidazolium-containing POSS with selenium powder under mild condition. The structure of POSS-Se was characterized by FT-IR, 1H NMR, 13C NMR, 29Si NMR, and elemental analysis. Acid treatment of POSS-Se results in a hydrophilic red-orange colored solid, which is highly sensitive and selective for the detection of Hg2+ ions in aqueous solutions by visually observing the color change to pale yellow, and to white. Interestingly, POSS-Se has no activity on this detection. This finding is due to the Se–Se formation by acid-treatment and subsequent coordination-induced cleavage upon the addition of Hg2+ ions. The detection behavior can be precisely monitored by a “turn-on” fluorescence phenomenon with the limit of detection (LOD) of 8.48 ppb, comparable to or higher than many reported Hg2+ sensors. Moreover, POSS-Se demonstrates a selective and efficient adsorption of Hg2+ ions with a maximum capacity of 952 mg g–1. The value is higher than most reported adsorbents for Hg2+ ions, typically thiol and/or thioether functional materials, indicating its promise as an efficient adsorbent for the selective removal of Hg2+ ions from industrial wastewater. This work may open up new horizons for the exploration of selenium-containing functional POSS.

scholarly journals Preparation of Soluble POSS-Linking Polyamide and Its Application in Antifogging Films

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3178
Author(s):  
Tomoya Kozuma ◽  
Aki Mihata ◽  
Yoshiro Kaneko
Keyword(s):  
Water Vapor ◽  
Heat Treating ◽  
Scratch Test ◽  
29Si Nmr ◽  
Polar Solvents ◽  
Amide Bonds ◽  
Ethylcarbodiimide Hydrochloride ◽  
Ft Ir ◽  
Oligomeric Silsesquioxane ◽  
Condensing Agents

In this study, we prepared a polyhedral oligomeric silsesquioxane (POSS)-linking polyamide (POSS polyamide) by a polycondensation of ammonium-functionalized POSS (POSS-A) and carboxyl-functionalized POSS (POSS-C) in dehydrated dimethyl sulfoxide (DMSO) using 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) as condensing agents. The obtained POSS polyamide was soluble in various highly polar solvents, and it could form a self-standing film. FT-IR, 1H NMR, and 29Si NMR analyses showed that POSS polyamide is a polymer in which POSS-A and POSS-C are linked almost linearly by amide bonds. Furthermore, the cast film obtained by heat-treating the polymer at 150 °C for 30 min exhibited excellent transparency and hard-coating (pencil scratch test: 5H) and antifogging properties (evaluation by water vapor exposure).

scholarly journals Preparation and characterization of polyhedral oligomeric silsesquioxane/polystyrene nanocomposites

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Benhong Yang ◽  
Meng Li ◽  
Yun Wu ◽  
Kang Wang
Keyword(s):  
Thermal Stability ◽  
Thermal Property ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
29Si Nmr ◽  
Solution Blending ◽  
Oligomeric Silsesquioxane ◽  
Tga And Dsc ◽  
Thermal Stability Of

AbstractSeveral inorganic/organic nanocomposites were prepared via solution-blending of cage-like octahexyl-polyhedral oligomeric silsesquioxane (Oh-POSS) with polystyrene (PS) in THF solvent. FTIR and 29Si-NMR were employed to characterize the structures of the nanocomposites. SEM pictures showed that the sample films were smooth and no POSS aggregation was observed when POSS content was lower than 1.0 wt%. TGA and DSC were used to investigate the thermal property. The results showed that the incorporation of nanosized Oh-POSS enhanced the thermal stability of PS with low POSS content. When 1.0 wt% of Oh-POSS was incorporated into PS matrix, the Tg and Td increased by 7.7 °C and 8.2 °C, respectively. However, higher POSS contents (>1.0 wt%) would deteriorate the thermal property of the nanocomposites due to the severe congregation of POSS..

A highly sensitive and fast-responding oxygen sensor based on POSS-containing hybrid copolymer films

2017 ◽  
Vol 5 (44) ◽  
pp. 11395-11402 ◽  
Author(s):  
Yongyun Mao ◽  
Qian Zhao ◽  
Jianchang Wu ◽  
Tingting Pan ◽  
Bingpu Zhou ◽  
...  
Keyword(s):  
High Performance ◽  
Oxygen Sensor ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oxygen Sensors ◽  
Inorganic Hybrid ◽  
Copolymer Films ◽  
Hybrid Copolymer ◽  
Highly Sensitive ◽  
Platinum Porphyrin ◽  
Oligomeric Silsesquioxane

Organic–inorganic hybrid 3-(trimethoxysily)propylmethacrylate-co-platinum porphyrin-co-methacrylolsobutyl-polyhedral oligomeric silsesquioxane (TPMA-PtTPP-POSS) copolymer films were synthesized and applied as high-performance oxygen sensors.

scholarly journals A New Fluorescent Chemosensor for Cobalt(II) Ions in Living Cells Based on 1,8-Naphthalimide

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3093 ◽  
Author(s):  
Yu-Long Liu ◽  
Liu Yang ◽  
Lu Li ◽  
You-Quan Guo ◽  
Xiao-Xiao Pang ◽  
...  
Keyword(s):  
Fluorescence Enhancement ◽  
Color Change ◽  
Limit Of Detection ◽  
Fluorescent Sensor ◽  
Cell Permeability ◽  
Fluorescent Chemosensor ◽  
Fluorescent Method ◽  
Colorimetric Response ◽  
Highly Sensitive ◽  
Distinct Color

In this work, a highly selective fluorescent chemosensor N-(2-(2-butyl-1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinolin-6-yl)hydrazine-1-carbonothioyl)benzamide (L) was prepared and characterized. An assay to detect the presence of cobalt(II) ions was developed by utilizing turn-on fluorescence enhancement with visual colorimetric response. Upon treatment with Co2+, a remarkable fluorescence enhancement located at 450 nm was visible to naked eyes accompanied with a distinct color change (from pink to colorless) in a CH3CN/HEPES (4/1, v/v, pH = 7.4) solution due to the formation of a 1:1 complex at room temperature. In addition, the linear concentration range for Co2+ was 0–25 µM with the limit of detection down to 0.26 µM. Thus, a highly sensitive fluorescent method based on chelation-assisted fluorescence enhancement was developed for the trace-level detection of Co2+. The sensor was found to be highly selective toward Co2+ ions with a large number of coexisting ions. Furthermore, the L probe can serve as a fluorescent sensor for Co2+ detecting in biological environments, demonstrating its low toxic properties to organisms and good cell permeability in live cell imaging.

scholarly journals Novel Multifunctional Luminescent Electrospun Fluorescent Nanofiber Chemosensor-Filters and Their Versatile Sensing of pH, Temperature, and Metal Ions

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1259 ◽  
Author(s):  
Bo-Yu Chen ◽  
Yen-Chen Lung ◽  
Chi-Ching Kuo ◽  
Fang-Cheng Liang ◽  
Tien-Liang Tsai ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Color Change ◽  
Ethylenediaminetetraacetic Acid ◽  
Fluorescence Emission ◽  
Volume Ratio ◽  
High Sensitivity ◽  
Electrospinning Process ◽  
Solution Temperature ◽  
Highly Sensitive ◽  
Nanofibrous Membranes

Novel multifunctional fluorescent chemosensors composed of electrospun (ES) nanofibers with high sensitivity toward pH, mercury ions (Hg2+), and temperature were prepared from poly(N-Isopropylacrylamide-co-N-methylolacrylamide-co-rhodamine derivative) (poly(NIPAAm-co-NMA-co-RhBN2AM)) by employing an electrospinning process. NIPAAm and NMA moieties provide hydrophilic and thermo-responsive properties (absorption of Hg2+ in aqueous solutions), and chemical cross-linking sites (stabilization of the fibrous structure in aqueous solutions), respectively. The fluorescent probe, RhBN2AM is highly sensitive toward pH and Hg2+. The synthesis of poly(NIPAAm-co-NMA-co-RhBN2AM) with different compositions was carried on via free-radical polymerization. ES nanofibers prepared from sensory copolymers with a 71.1:28.4:0.5 NIPAAm:NMA:RhBN2AM ratio (P3 ES nanofibers) exhibited significant color change from non-fluorescent to red fluorescence while sensing pH (the λPL, max exhibited a 4.8-fold enhancement) or Hg2+ (at a constant Hg2+ concentration (10−3 M), the λPL, max of P3-fibers exhibited 4.7-fold enhancement), and high reversibility of on/off switchable fluorescence emission at least five times when Hg2+ and ethylenediaminetetraacetic acid (EDTA) were sequentially added. The P3 ES nanofibrous membranes had a higher surface-to-volume ratio to enhance their performance than did the corresponding thin films. In addition, the fluorescence emission of P3 ES nanofibrous membranes exhibited second enhancement above the lower critical solution temperature. Thus, the ES nanofibrous membranes prepared from P3 with on/off switchable capacity and thermo-responsive characteristics can be used as a multifunctional sensory device for specific heavy transition metal (HTM) in aqueous solutions.

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 A novel optode sensor for the determination of palladium(II) in water and a hydrogenation catalyst

2009 ◽  
Vol 74 (3) ◽  
pp. 311-315 ◽  
Author(s):  
Hossein Tavallali ◽  
Pisheh Jahromi
Keyword(s):  
Response Time ◽  
Aqueous Solutions ◽  
Optical Sensor ◽  
Color Change ◽  
Limit Of Detection ◽  
Linear Range ◽  
Hydrogenation Catalyst ◽  
Catalyst Sample ◽  
Dynamic Linear Range

A novel optical sensor was established to determine palladium(II) based on the immobilization of 1-(2-pyridylazo)-2-naphthol (PAN) on a triacetylcellulose membrane. Palladium ions react with the immobilized PAN and cause a decrease in the absorbance of the membrane at 469 nm. The response time of the optode was 8-10 min depending on the concentration of Pd(II) ions. This sensing phase had a dynamic linear range of 0.10-12.0 ?g ml-1 palladium ions with a limit of detection of 65 ng ml-1. The sensor can readily be regenerated using an ethylenediamine solution. The sensor could be fully regenerated, and the color change was fully reversible. The method was successfully applied for the determination of Pd(II) in synthetic aqueous solutions and in a hydrogenation catalyst sample.

Preparation of a Novel Functionated POSS Nano-Particle Bearing the Perfluoro Aryl Ether Dendron

2010 ◽  
Vol 148-149 ◽  
pp. 1212-1216
Author(s):  
Li Yun Song ◽  
Shun Jin Peng ◽  
Yang Shu
Keyword(s):  
Reaction Times ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Functional Materials ◽  
Polymer Materials ◽  
Synthesis Reaction ◽  
Nano Particle ◽  
Aryl Ether ◽  
Oligomeric Silsesquioxane ◽  
Ether Synthesis ◽  
Williamson Ether Synthesis

In this paper, the perfluoro aryl ether dendrons were synthesized by mesylate reaction, and using the dendron as a modifier to prepare a novel fluorinated polyhedral oligomeric silsesquioxane ( F-POSS) nano-particle bearing this fluorine-containing dendron. In this approach, the Williamson ether synthesis technique was used as the generation enhancement step. Second generation perfluorobenzyl alcohol dendron was obtained from active mesylated precursors. This mesylate actiation technology has the advantage of short reaction times in the subsequent steps and avoids chromatographic purifiction. Second genenriation dendron was then built by repitition of Williamson ether synthesis reaction of mesylate derivative. It is possible for this new nano-particle to be used in the modification of polymer materials to make the durable superhydrophobic and oilphobic surface functional materials with excellent self-cleaning properties.

Sign in / Sign up

Export Citation Format

Share Document