Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

Abstract

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.

Architectures and Mechanisms of Perylene Diimide-Based Optical Chemosensors for pH Probing

“…Nonetheless, significant efforts have recently focused on developing inorganic composite sensors or probes by incorporating various PDIs, although these sensors were designed primarily for bioimaging or monitoring of other analytes [38,39]. The common way to fabricate inorganic composite sensors of PDI would be via the functionalization or blending of PDI with organic [40], inorganic [41][42][43] or organic-inorganic [44][45][46][47][48][49] counterparts in the form of conjugates or nanoparticles, which are conducive to development of fluorescence bioimaging, NIR-absorbing photosensitizers for photodynamic therapy and environmental or health monitoring [50]. Surface immobilization of PDIs on inorganic nanoparticles, such as silica gels [51,52] and single-walled carbon nanotubes (SWCNTs) [53], has also been reported for fluorescent or colorimetric sensing.…”

A Novel Family of Cage-like (CuLi, CuNa, CuK)-phenylsilsesquioxane Complexes with 8-Hydroxyquinoline Ligands: Synthesis, Structure, and Catalytic Activity

“…Nanosized silsesquioxane [RSiO 1.5 ] n units bridge a gap between organics and inorganics with their pure inorganic Si-O-Si main chain, surrounded by various organic substituents [ 1 , 2 , 3 , 4 , 5 ]. Silsesquioxanes are often regarded as unique molecular models of silica, both for investigations into surface phenomena [ 6 ] and heterogeneous catalysis [ 7 ].…”

Controllable chiral inversion via thioether bond-activated J- and H-aggregation transformation

“…Chiral dendrimers, 9 are ideal building blocks for the construction of multi-functional chiral materials, such as chiral catalysis, 10 drug release, 11 chiral sensing, 12 and photonics. 13 Multiple non-covalent interactions are frequently introduced to endow chiral dendrimers with diverse assembly behavior and functional applications.…”