The Role of Polyhedral Oligomeric Silsesquioxanes in Optical Applications

Tunstall-Garcia, Helen; Charles, Bethan; Evans, Rachel C.

doi:10.1002/adpr.202000196

Cited by 16 publications

(9 citation statements)

References 127 publications

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“…Cage-like − and ladder-like − silsesquioxanes have been of interest because the curing of these inorganic/organic hybrids yields materials that possess the hardness of the silica core and the flexibility and compatibility of the cross-linked organic functionalities that are attached to the silicon atoms. For example, the cross-linking of the glycidyl groups of the cage-like octakis(3-glycidyloxypropyl) silsesquioxane (GPOSS, Scheme ) using a cationic ring-opening initiator has previously yielded such a coating that is hard and highly transparent. , This coating is so abrasion resistant that no wear tracks are visible on it after abrasion for tens of times with steel wool under an average pressure of 13 kPa, in contrast with the deep abrasion tracks created in wholly organic polymer coatings after a single abrasion stroke .…”

Section: Introductionmentioning

confidence: 99%

UV Curing Behavior of Five Heteroleptic POSS Bearing Methacrylate and Glycidyl Groups and Evaluation of Their Potential for Hard Yet Flexible Coatings

Bender

Hait

Lichtenhan

et al. 2022

ACS Appl. Polym. Mater.

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Octakis(3-methacryloxypropyl) silsesquioxane (MPOSS) photocured using a free-radical initiator under N 2 has a high hardness H of 0.99 ± 0.05 GPa but has poor bendability. Octakis(3-glycidyloxypropyl) silsesquioxanes (GPOSS) photocured in air using a cationic initiator is more flexible than the cured MPOSS coating but has a lower H value of 0.65 ± 0.02 GPa. In this study, a family of heteroleptic POSSs (G m M n POSS) bearing 2, 4, or 6 glycidyl (G) groups and 6, 4, or 2 methacrylate (M) groups are photocured in N 2 , in air, in air then N 2 (air/N 2 ), and in N 2 /air. The hardest coating is obtained from a given precursor G m M n POSS when it is cured in N 2 /air. The G 2 M 6 POSS coating offers the best balance between H and bendability. At a thickness of 50 μm, this coating has an H value of 0.95 ± 0.07 GPa, a pencil hardness rating of >9H, and a critical bending radius of <1 mm for inward bending on the inner surface of a poly(ethylene terephthalate) substrate film. At a thickness of 10 μm, the G 2 M 6 POSS coating has a critical outward bending radius of 1.5 mm. This study provides experimental guidelines for the proper photocuring of G m M n POSS and reveals that G 2 M 6 POSS is the best candidate for hard yet flexible coatings, which may be used to protect the touchscreens of foldable smartphones among other applications.

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Section: Introductionmentioning

confidence: 99%

UV Curing Behavior of Five Heteroleptic POSS Bearing Methacrylate and Glycidyl Groups and Evaluation of Their Potential for Hard Yet Flexible Coatings

Bender

Hait

Lichtenhan

et al. 2022

ACS Appl. Polym. Mater.

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“…Fluorescent hybrid materials, which combine the advantages of both organic and inorganic material, have become one of the most popular star materials in modern society due to their potential applications in many fields such as sensor technology [ 1 , 2 , 3 , 4 , 5 , 6 ], photoelectric device [ 7 , 8 , 9 , 10 , 11 , 12 ], biomedicine [ 13 , 14 , 15 , 16 , 17 ], and environmental sciences [ 18 , 19 , 20 , 21 ]. However, the demand for high-performance and multifunctional fluorescent materials has increased dramatically along with the development of science and technology.…”

Section: Introductionmentioning

confidence: 99%

Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

et al. 2022

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Polyhedral oligomeric silsesquioxane (POSS) has a nanoscale silicon core and eight organic functional groups on the surface, with sizes from 0.7 to 1.5 nm. The three-dimensional nanostructures of POSS can be used to build all types of hybrid materials with specific performance and controllable nanostructures. The applications of POSS-based fluorescent materials have spread across various fields. In particular, the employment of POSS-based fluorescent materials in sensing application can achieve high sensitivity, selectivity, and stability. As a result, POSS-based fluorescent materials are attracting increasing attention due to their fascinating vistas, including unique structural features, easy fabrication, and tunable optical properties by molecular design. Here, we summarize the current available POSS-based fluorescent materials from design to sensing applications. In the design section, we introduce synthetic strategies and structures of the functionalized POSS-based fluorescent materials, as well as photophysical properties. In the application section, the typical POSS-based fluorescent materials used for the detection of various target objects are summarized with selected examples to elaborate on their wide applications.

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“…In the past decades, POSS have been used as building blocks, crosslinkers, and nanofillers to afford hybrid materials with improved stability, mechanical properties and chemical resistance [10]. POSS have great potential in various fields such as catalysis, sensing, photoelectronic, energy, and biomedicine [3,[11][12][13][14][15]. In this review, we will emphasize the most recent advances on the use of POSS in biomedicine, with particular focus on drug delivery, photodynamic therapy and bioimaging.…”

Section: Introductionmentioning

confidence: 99%

Use of Polyhedral Oligomeric Silsesquioxane (POSS) in Drug Delivery, Photodynamic Therapy and Bioimaging

2021

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Polyhedral oligomeric silsesquioxanes (POSS) have attracted considerable attention in the design of novel organic-inorganic hybrid materials with high performance capabilities. Features such as their well-defined nanoscale structure, chemical tunability, and biocompatibility make POSS an ideal building block to fabricate hybrid materials for biomedical applications. This review highlights recent advances in the application of POSS-based hybrid materials, with particular emphasis on drug delivery, photodynamic therapy and bioimaging. The design and synthesis of POSS-based materials is described, along with the current methods for controlling their chemical functionalization for biomedical applications. We summarize the advantages of using POSS for several drug delivery applications. We also describe the current progress on using POSS-based materials to improve photodynamic therapies. The use of POSS for delivery of contrast agents or as a passivating agent for nanoprobes is also summarized. We envision that POSS-based hybrid materials have great potential for a variety of biomedical applications including drug delivery, photodynamic therapy and bioimaging.

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The Role of Polyhedral Oligomeric Silsesquioxanes in Optical Applications

Cited by 16 publications

References 127 publications

UV Curing Behavior of Five Heteroleptic POSS Bearing Methacrylate and Glycidyl Groups and Evaluation of Their Potential for Hard Yet Flexible Coatings

UV Curing Behavior of Five Heteroleptic POSS Bearing Methacrylate and Glycidyl Groups and Evaluation of Their Potential for Hard Yet Flexible Coatings

Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

Use of Polyhedral Oligomeric Silsesquioxane (POSS) in Drug Delivery, Photodynamic Therapy and Bioimaging

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