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Upstream product

• 108-38-3 m-xylene 
• 114468-28-9 (E)-N-Phenyl-4-octyloxybenzaldimin 
• 24083-13-4 4-octyloxybenzaldehyde 

Relevant academic research and scientific papers

Vacuum-deposited submonolayer thin films of a three-ring bent-core compound

Submonolayer thin films of a three-ring bent-core (that is, banana-shaped) compound, m-bis(4-n-octyloxystyryl)-benzene (m-OSB), were prepared by the vacuum-deposition method, and their morphologies, structures, and phase behavior were investigated by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The films have island shapes ranging from compact elliptic or circular patterns at low temperatures (below 40 ?°C) to branched patterns at high temperatures (above 60 ?°C). This shape evolution is contrary to the prediction based on the traditional diffusion-limited aggregation (DLA) theory. AFM observations revealed that two different mechanisms governed the film growth, in which the compact islands were formed via a dewetting-like behavior, while the branched islands diffusion-mediated. It is suggested m-OSB forms a two-dimensional liquid crystal at the low-temperature substrate that is responsible for the unusual formation of compact islands. All of the monolayer islands are unstable and apt to transform to slender bilayer crystals at room temperature. This phase transition results from the peculiar molecular shape and packing of the bent-core molecules and is interpreted as escaping from macroscopic net polarization by the formation of an antiferroelectric alignment.

Photochemistry of Electron-Rich 1,3-Distyrylbenzenes

The 1,3-distyrylbenzenes 3, containing up to seven alkoxy groups, are subjected to the oxidative photocyclization.Elimination of methanol (3bb -> 7bb, 3bf -> 7bf) and quinone oxidation can occur as competitive or consecutive reactions in the formation of the products 6, 7, and 8.Selfsensitized generation of singlet oxygen by 6bf can lead to endoperoxide formation (6bf -> 11).