scholarly journals Multifunctional Polyhedral Oligomeric Silsesquioxane (POSS) Based Hybrid Porous Materials for CO2 Uptake and Iodine Adsorption

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 221
Author(s):  
Mohamed Gamal Mohamed ◽  
Mei-Yin Tsai ◽  
Chih-Feng Wang ◽  
Chih-Feng Huang ◽  
Martin Danko ◽  
...  
Keyword(s):  
Porous Materials ◽  
High Surface ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Building Blocks ◽  
Co2 Uptake ◽  
Thermal Stabilities ◽  
Surface Areas ◽  
Different Types ◽  
Oligomeric Silsesquioxane ◽  
High Carbon Dioxide

In this study, two different types of hybrid porous organic polymers (POPs), polyhedral oligomeric silsesquioxane tetraphenylpyrazine (POSS-TPP) and tetraphenylethene (POSS-TPE), were successfully synthesized through the Friedel−Crafts polymerization of tetraphenylpyrazine (TPP) and tetraphenylethene (TPE), respectively, with octavinylsilsesquioxane (OVS) as node building blocks, in the presence of anhydrous FeCl3 as a catalyst and 1,2-dichloroethane at 60 °C. Based on N2 adsorption and thermogravimetric analyses, the resulting hybrid porous materials displayed high surface areas (270 m2/g for POSS-TPP and 741 m2/g for POSS-TPE) and outstanding thermal stabilities. Furthermore, as-prepared POSS-TPP exhibited a high carbon dioxide capacity (1.63 mmol/g at 298 K and 2.88 mmol/g at 273 K) with an excellent high adsorption capacity for iodine, reaching up to 363 mg/g, compared with the POSS-TPE (309 mg/g).

A Highly Crystalline Anthracene-Based MOF-74 Series Featuring Electrical Conductivity and Luminescence

2019 ◽  
Author(s):  
Patricia Scheurle ◽  
Andre Mähringer ◽  
Andreas Jakowetz ◽  
Pouya Hosseini ◽  
Alexander Richter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Metal Ions ◽  
Light Emission ◽  
Block Design ◽  
High Surface ◽  
Visible Spectrum ◽  
Building Blocks ◽  
Divalent Metal Ions ◽  
Conductivity Enhancement ◽  
Surface Areas

Recently, a small group of metal-organic frameworks (MOFs) has been discovered featuring substantial charge transport properties and electrical conductivity, hence promising to broaden the scope of potential MOF applications in fields such as batteries, fuel cells and supercapacitors. In combination with light emission, electroactive MOFs are intriguing candidates for chemical sensing and optoelectronic applications. Here, we incorporated anthracene-based building blocks into the MOF-74 topology with five different divalent metal ions, that is, Zn2+, Mg2+, Ni2+, Co2+ and Mn2+, resulting in a series of highly crystalline MOFs, coined ANMOF-74(M). This series of MOFs features substantial photoluminescence, with ANMOF-74(Zn) emitting across the whole visible spectrum. The materials moreover combine this photoluminescence with high surface areas and electrical conductivity. Compared to the original MOF-74 materials constructed from 2,5-dihydroxy terephthalic acid and the same metal ions Zn2+, Mg2+, Ni2+, Co2+ and Mn2+, we observed a conductivity enhancement of up to six orders of magnitude. Our results point towards the importance of building block design and the careful choice of the embedded MOF topology for obtaining materials with desired properties such as photoluminescence and electrical conductivity.

scholarly journals Preparation of Versatile, Porous Poly-Arylthioethers by Reversible Pd-Catalysed C–S/C–S Metathesis

2021 ◽  
Author(s):  
Miguel A. Rivero-Crespo ◽  
Georgios Toupalas ◽  
Bill Morandi
Keyword(s):  
High Surface ◽  
Building Blocks ◽  
Polyphenylene Sulfide ◽  
Extreme Resistance ◽  
Surface Areas ◽  
Metal Capture ◽  
2D And 3D ◽  
Metal Sensing ◽  
Single Material ◽  
Porous Poly

Porous organic frameworks have shown a number of promising properties; however, their industrial application is usually hampered due to the lability of their linkages (imine, boroxine, etc.). Inspired by the outstanding chemical, mechanical and thermal resistance of the 1D polymer polyphenylene sulfide (PPS), we hypothesized that 2D and 3D poly-arylthioether frameworks would merge the attractive features common to porous frameworks and PPS in a single material. Herein, we report a Pd-catalysed C–S/C–S metathesis-based method to prepare new porous poly-arylthioether frameworks in good yields. The self-correcting nature of the process has enabled the synthesis of new, robust materials with high surface areas. Despite the frameworks’ extreme resistance to harsh chemicals, they can be fully recycled to recover the original building blocks using the same catalytic reaction. In addition, we demonstrate preliminary results showing that these materials have great potential in several environmentally relevant applications including metal capture, metal sensing and heterogeneous catalysis. In a broader context, these results clearly demonstrate the untapped potential of emerging single-bond metathesis reactions in the preparation of new materials.

Tuning “thiol-ene” reactions toward controlled symmetry breaking in polyhedral oligomeric silsesquioxanes

2014 ◽  
Vol 5 (3) ◽  
pp. 1046-1053 ◽  
Author(s):  
Yiwen Li ◽  
Kai Guo ◽  
Hao Su ◽  
Xiaopeng Li ◽  
Xueyan Feng ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Building Blocks ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Ene Reactions ◽  
Oligomeric Silsesquioxane

A facile method toward polyhedral oligomeric silsesquioxane-based nano-building blocks with controlled symmetry breaking was reported by using thiol-ene chemistry.

Synthesis and photo- and electro-luminescent properties of Ir(iii) complexes attached to polyhedral oligomeric silsesquioxane materials

RSC Advances ◽  
2015 ◽  
Vol 5 (98) ◽  
pp. 80572-80582 ◽  
Author(s):  
Tianzhi Yu ◽  
Xin Wang ◽  
Wenming Su ◽  
Chengcheng Zhang ◽  
Yuling Zhao ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Luminescent Properties ◽  
Thermal Stabilities ◽  
Solution Processed ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Oligomeric Silsesquioxane

Two new POSS materials with an emissive Ir(iii) complex and carbazole units were successfully synthesized. Their photophysical and electrochemical properties, thermal stabilities and solution processed light-emitting devices were investigated.

scholarly journals Lithium Storage in Nanoporous Complex Oxide 12CaO•7Al2O3 (C12A7)

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1547 ◽  
Author(s):  
Navaratnarajah Kuganathan ◽  
Alexander Chroneos
Keyword(s):  
Porous Materials ◽  
Density Functional ◽  
High Surface ◽  
Complex Oxide ◽  
Li Ion Batteries ◽  
Lithium Storage ◽  
Metallic Character ◽  
Surface Areas ◽  
Li Ion ◽  
Storage Technologies

Porous materials have generated a great deal of interest for use in energy storage technologies, as their architectures have high surface areas due to their porous nature. They are promising candidates for use in many fields such as gas storage, metal storage, gas separation, sensing and magnetism. Novel porous materials which are non-toxic, cheap and have high storage capacities are actively considered for the storage of Li ions in Li-ion batteries. In this study, we employed density functional theory simulations to examine the encapsulation of lithium in both stoichiometric and electride forms of C12A7. This study shows that in both forms of C12A7, Li atoms are thermodynamically stable when compared with isolated gas-phase atoms. Lithium encapsulation through the stoichiometric form (C12A7:O2−) turns its insulating nature metallic and introduces Li+ ions in the lattice. The resulting compound may be of interest as an electrode material for use in Li-ion batteries, as it possesses a metallic character and consists of Li+ ions. The electride form (C12A7:e−) retains its metallic character upon encapsulation, but the concentration of electrons increases in the lattice along with the formation of Li+ ions. The promising features of this material can be tested by performing intercalation experiments in order to determine its applicability in Li-ion batteries.

Novel POSS-based organic–inorganic hybrid porous materials by low cost strategies

2015 ◽  
Vol 3 (12) ◽  
pp. 6542-6548 ◽  
Author(s):  
Shaolei Wang ◽  
Liangxiao Tan ◽  
Chengxin Zhang ◽  
Irshad Hussain ◽  
Bien Tan
Keyword(s):  
Porous Materials ◽  
Surface Area ◽  
Hybrid Materials ◽  
Low Cost ◽  
Building Blocks ◽  
Bet Surface Area ◽  
Coupling Reactions ◽  
Inorganic Hybrid ◽  
Oligomeric Silsesquioxane ◽  
First Time

Two kinds of POSS-based organic–inorganic hybrid porous materials have been synthesized via Friedel–Crafts and Scholl coupling reactions, for the first time, using low-cost building blocks i.e., octaphenylsilsesquioxanes and simple knitting approaches to obtain high Brunauer–Emmett–Teller (BET) surface area porous polyhedral oligomeric silsesquioxane (POSS)-based hybrid materials.

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