Low molecular weight organic materials

Caruso F, Yang WJ, Trau D, Renneberg R. Microencapsulation of uncharged low molecular weight organic materials by polyelectrolyte multilayer self-assembly. Langmuir 2000 16 8932-8936. 

Epitaxial crystallization of polymers has been investigated for a wide variety of substrates minerals (alkali halides, talc, mica, and so on), low molecular weight organic materials (condensed and linear aromatics, benzoic acid and many of its substituted variants and their salts or hemiacids, other organic molecules of different types), and other crystalline polymers. 

This complexation phenomenon has been studied experimentally and progress has been made on predicting its effect. Chiou et al. (16) describe one approach which correlates the complexecl low molecular weight organic material, Sh with its solubility in pure water, Sw. and the DOM content, X, of the water. 

Pure, low molecular weight organic materials generally produce very narrow melting peaks. Because this narrow temperature range inevitably lies,... 

EL has been well known in inorganic semiconducting materials [125-128] and low-molecular-weight organic materials [29-38,129-132]. However, in recent years, there has been great interest in the use of semiconducting EL polymers for... 

F Caruso, W. Yang, D. Trau and R. Rermeberg, Microencapsu-lation of uncharged low molecular weight organic materials by... 

As would be expected from their structures, most plastics, at least in the solid state, are very poor conductors of electricity indeed, some are amongst the best insulators known. Dielectric properties—relative permittivity and power factor (or loss factor)—are typical of those found in low-molecular-weight organic materials, although the fine structure of such properties is affected by features associated with the structure. Conversely, the measurement of dielectric properties, which can be made with high precision over very wide frequency ranges, provides a powerful means of probing polymer structure. 

Organic contamination in the form of low molecular weight organic materials on the surface represents the most prevalent problem which prevents adequate surface adhesion. These contaminations may exist in the form of residues, mold release agents, antioxidants, carbon residues, or other organic compounds. 

A light modulating cell comprises a pair of substrates, alignment layers disposed on at least one of the substrates and a solution of polymerizable prepolymer and low molecular weight organic material disposed between the pair of substrates. The solution is phase separated and forms a layer of polymeric material and a layer of organic material between the two substrates. An external force may then be applied across the substrates to alter the optical appearance of the layer of organic material from one state to another. A photo-sensitive layer may also be provided in the cell. 

---