Hierarchical Assembly of Organic/Inorganic Building Molecules with π–π Interactions

Abstract

Hierarchical assemblies of perylenetetracarboxylic diimide bridged silsesquioxane (PDBS) with controlled structure at multi‐length scale are studied using both experimental and computational methods. The organization process spans multi‐length scales and includes three continuous steps: 1) stacking of the preprogrammed molecules into small clusters, 2) growing of the small clusters into nanoscale building blocks with various sizes and shapes depending on the experimental conditions, and 3) aggregation of nanoscale building blocks into micro‐ or macro‐scale assemblies. The main factors determining the assembly morphology are the second and third steps, which can be controlled by varying the experimental conditions, such as solution drying rate, solvent composition, and PDBS concentration. Despite the different morphologies, all of these assemblies possess highly ordered lamellar structure. It is found that incorporating perylenetetracarboxylic diimide (PD) moieties into the highly ordered silica network endows the PD components with high thermal and mechanical stability, as well as improved optical and electronic properties.

Synthesis, Structure, Aggregation‐Induced Emission, Self‐Assembly, and Electron Mobility of 2,5‐Bis(triphenylsilylethynyl)‐3,4‐diphenylsiloles

“…[12] However, it is generally known that chromophore aggregation can quench light emission due to increased excited state relaxation through nonradiative pathways. [13] Thus, the synthesis of fluorophores with strong emissions in the aggregate states through 1D self-assembly is intriguing, although such materials are seldom reported. Recently, Park prepared several organogels by the self-assembly of low-molecular-weight fluorophores and found that the emission is induced or enhanced along the stacking direction.…”

Preparation of Protamine–Titania Microcapsules Through Synergy Between Layer‐by‐Layer Assembly and Biomimetic Mineralization

“…[2][3][4] Although the electrostatic interaction is often used to drive the multilayer assembly, other driving forces including covalent bonding, hydrogen bonding, and hydrophobic interactions have been also exploited in the past decade. [5][6][7][8][9][10][11] This facilitates the incorporation of a broad range of functionality into capsules and planar surface using LbL assembly strategy, thereby increasing the potential application spectrum of the asprepared materials. [5,10,[12][13][14][15][16][17][18] Recently, organic-inorganic hybrid multilayers synthesized by LbL assembly have fascinated many researchers due to their delicate structure and function.…”

Dipole-Induced, Thermally Stable Lamellar Structure by Polar Aromatic Silane

“…[4][5][6] Organosilanes are ideal candidates for such efforts due to their ability to self-assemble and the intrinsic hybrid configuration of organic/inorganic moieties. Yet, the main emphasis has been focused on alkylsilane, where an alkyl group is linked with a silane terminal, i.e., R-SiX 3 (R is alkane and X can be halogen or alkoxy).…”