Ordered Hybrids from Template‐Free Organosilane Self‐Assembly

Abstract

Despite considerable achievements over the last two decades, nonporous organic-inorganic hybrid materials are mostly amorphous, especially in the absence of solvothermal processes. The organosilane self-assembly approach is one of the few opportunities for creating a regular assembly of organic and inorganic moieties. Additionally, well-established organosilicon chemistry enables the introduction of numerous organic functionalities. The synthesis of periodically ordered hybrids relies on mono-, bis-, or multisilylated organosilane building blocks self-assembling into hybrid mesostructures or superstructures, subsequently cross-linked by siloxane Si-O-Si condensation. The general synthesis procedure is template-free and one-step. However, three concurrent processes underlie the generation of self-organized hybrid networks: thermodynamics of amphiphilic aggregation, dynamic self-assembly, and kinetically controlled sol-gel chemistry. Hence, the set of experimental conditions and the precursor structure are of paramount importance in achieving long-range order. Since the first developments in the mid-1990s, the subject has seen considerable progress leading to many innovative advanced nanomaterials providing promising applications in membranes, pollutant remediation, catalysis, conductive coatings, and optoelectronics. This work reviews, comprehensively, the primary evolution of this expanding field of research.

In vivo study of self‐assembled alkylsilane coated degradable magnesium devices

“…30 A good coating system should have optimum thickness, strong adhesion to substrate and defect free. 31 The polysiloxane coating satisfy all the above requirements.…”

“…35 The amphiphilic properties of alkylsilane monomers can be harnessed to create self-assembled nanomaterials, including lamellar and other ordered structures. 30,36 Importantly, upon self-assembly the siloxane groups polymerize creating mechanicaly stable structures. We recently developed a micron thick self-assembled multilayer AS coatings for resorbable Mg devices, 37 which have a number of important advantages.…”

Organosilica-metallic sandwich materials as precursors for palladium and platinum nanoparticle synthesis

“…On the other hand, the use of amphiphilic organosilane molecules could be an alternative route in the preparation of a structured functional silica material presenting a high organic function density, as already proposed in a few studies. 45 Thanks to the possibilities offered by this approach, aminoundecyl-triethoxysilane, which can be considered as an amphiphilic organosilane, has been used for the preparation of mesostructured materials starting from their self-assembly into reverse cylindrical micelles or lamellar arrangements. [42][43][44] These systems have recently been reviewed.…”

Photoinduced self-assembly of carboxylic acid-terminated lamellar silsesquioxane: highly functional films for attaching and patterning amino-based ligands

“…More recently, research efforts have centred on ways to inhibit the disordering effect of Si-O-Si condensation, in order to create ordered organosilica nanostructures. 9 When the ultimate aim is not the fabrication of mesoporous materials, the major route for synthesizing nanostructured hybrids has been the direct template-free self-assembly of silsesquioxane precursors, usually leading to lamellar structures. 8 In fact, unique chemical or physical properties may emerge from hybrid materials when organic moieties form mesoscopically segregated functional domains, both ordered and conned.…”