A Porous POSiSil Suited for Pressure‐Driven Reversible Confinement of Solutions: PSS‐2

Smet, Sam; Verlooy, Pieter; Pulinthanathu, Sreeprasanth; Kirschhock, Christine; Taulèlle, Francis; Breynaert, Eric; Martens, Johan A.

doi:10.1002/chem.201901913

Cited by 6 publications

(14 citation statements)

References 54 publications

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“…8. 182 After global compression of the material by 40% (Intrusion1 trace), reversible water intrusion-extrusion was obtained, with hysteresis characteristic of a shock absorber. Closure of the hysteresis loop and almost perfect overlap of intrusion and extrusion curves was observed in consecutive cycles.…”

Section: Turning Water Into a Tuneable Solvent -The Outlookmentioning

confidence: 99%

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Water as a tuneable solvent: a perspective

et al. 2020

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Section: Turning Water Into a Tuneable Solvent -The Outlookmentioning

confidence: 99%

“…Fig.8. Water intrusion-extrusion cycles on (D4R-(DMS) 8) n silicone copolymer foam 182. Reprinted with permission from ref 105…”

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confidence: 99%

Water as a tuneable solvent: a perspective

et al. 2020

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“…The resulting polymer would be hydrophobic due to the methyl groups on the silicone linkers. Chemically, it would be very similar to the polyoligosiloxysilicone (POSiSil) material family described in the previous research. , …”

Section: Introductionmentioning

confidence: 79%

“…Chemically, it would be very similar to the polyoligosiloxysilicone (POSiSil) material family described in the previous research. 22,49 In this work, the potential of the [Si 8 O 12 ][OSi(CH 3 ) 2 Cl] 8 spherosilicate to form hydrophobic POSiSil thin films on silicon wafers is evaluated. Silicon wafers were chosen as a substrate.…”

Section: ■ Introductionmentioning

confidence: 99%

Cross-Linking Nanometer-Sized Reactive Spherosilicates to Synthesize Tuneable Hydrophobic POSiSil Foams Suitable for Applications as Sensors

Smet,

Vallaey,

Sree

et al. 2023

ACS Appl. Nano Mater.

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Thin hydrophobic polyoligosiloxysilicone (POSiSil) films were synthesized on silicon wafer substrates by spin coating reactive nanometer-sized spherosilicate solutions. Surface roughness was spontaneously induced due to the generation of HCl gas bubbles during the coating procedure, involving the cross-linking and solidification of spherosilicates. Variations in the coating solution and/or relative humidity during the curing phase allowed for a degree of precision in controlling this roughness, thereby impacting parameters such as the porosity and the static contact angle of water on the surface. The introduction of Pluronic 123 into the coating solution, followed by a calcination step after curing, was employed to further augment the surface roughness and porosity. Coatings characterized by uniform foam-like morphologies were synthesized, exhibiting static water contact angles as elevated as 135°. These hydrophobic POSiSil thin films with thicknesses in the nanometer scale have minimal interaction with water, as evidenced by wetting experiments conducted during the ellipsometry. The films also demonstrate the high chemical and thermal stability with no change in the morphology or static contact angle with water. The presence of significant surface area, resulting from the foam-like matrix, coupled with its innate hydrophobic properties and a relatively simple and easily attainable synthesis process, bestows upon the POSiSil coatings considerable potential across a broad spectrum of applications. One noteworthy application includes their use in the detection of volatile organic compounds.

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“…27 PSS-2 is constituted using silicate D4R node (Si 8 O 20 ) and dimethylsilicone linkers. 56 Interconnecting octakis (dimethylsilyl chloride) spherosilicates using linear, aliphatic α,ω-alkanediols (ethylene glycol, 1,5-pentanediol, and 1,7-heptanediol) yield PSiPOPs; new reticular materials exploiting the chemistry of Si−Cl bonds and alcohol functional groups. nuclearity and exhibit the disadvantage of nonselective node synthesis.…”

Section: ■ Introductionmentioning

confidence: 99%

Polysilicate Porous Organic Polymers (PSiPOPs), a Family of Porous, Ordered 3D Reticular Materials with Polysilicate Nodes and Organic Linkers

Jamoul,

Smet,

Radhakrishnan

et al. 2024

Chem. Mater.

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Spherosilicate, consisting of a double 4-ring cyclosilicate core (D4R; Si 8 O 20 ) with every corner functionalized with a dimethylsilyl chloride group (-SiMe 2 Cl), was used as a node to construct an isoreticular series of porous expanded network materials. Interconnecting the nodes with linear, aliphatic α,ωalkanediol linker molecules yields PolySilicate Porous Organic Polymers (PSiPOPs), a new type of ordered reticular material related to the well-known metal−organic and covalent organic frameworks (MOFs and COFs). In the synthesis, sacrificial hydrogen-bonded Si 8 O 20 cyclosilicate crystals are first converted into silyl chloride-terminated spherosilicate. In the second step, these nodes are linked by alkanediol units via the intermediate formation of a Si−N bond with catalytic amines such as pyridine and dimethylformamide. Overall, the presented synthesis converts D4R cyclosilicate into an ordered reticular framework with [Si 8 O 20 ]-[Si(CH 3 ) 2 -] 8 nodes and O-(CH 2 ) n -O linkers. Example materials with ethylene glycol, 1,5-pentanediol, and 1,7-heptanediol as linkers (n = 2, 5, and 7) were produced and characterized. On a macroscopic level, the synthesis yields porous frameworks exhibiting thermal stability up to 400 °C and chemical stability between pH 1 and 12. N 2 physisorption revealed a secondary mesopore structure, indicating future options to produce hierarchical materials using soft templates. The molecular-level structure of these reticular PSiPOP materials was elucidated by using an NMR crystallography approach implementing a combination of 1D and 2D 1 H and 29 Si solid-state MAS NMR spectroscopy experiments. Previously reported reticular COF/POP materials implementing D4R-based nodes used Si 8 octakis (phenyl) D4R POSS as a node, connecting it to the linker via a Si−C bond instead of a Si−O−C linkage.

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A Porous POSiSil Suited for Pressure‐Driven Reversible Confinement of Solutions: PSS‐2

Cited by 6 publications

References 54 publications

Water as a tuneable solvent: a perspective

Water as a tuneable solvent: a perspective

Cross-Linking Nanometer-Sized Reactive Spherosilicates to Synthesize Tuneable Hydrophobic POSiSil Foams Suitable for Applications as Sensors

Polysilicate Porous Organic Polymers (PSiPOPs), a Family of Porous, Ordered 3D Reticular Materials with Polysilicate Nodes and Organic Linkers

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