Sidechain transitions, model

As a model for such surface sidechain transitions, we consider here the... 

Since there are very few dynamic experimental investigations of pretransitional effects [8], not much modeling has been reported to date either. Based on work for the macroscopic dynamics of the nematic-isotropic transition in sidechain polymers [27 -29], it has been suggested [28] that the non-meanfield exponent observed in dynamic stress-optical experiments [8] can be accounted for at least qualitatively by the mode-coupling model [28, 29]. Intuitively this qualitatively new dynamic behavior can be traced back to static nonlinear coupling terms between the nematic order parameter and the strain tensor. 

Quite recently electromechanical and electro-optic effects have been studied in some detail for the SmA-SmC transition in sidechain LCE [40]. The authors account for their observation using a Landau model, which contains an additional elastic energy associated with the tilt, when compared to the description of low molecular weight materials. 

Support for the aromatic h> othesis comes from model studies and protein crystal structure analysis. In biomimetic model studies, Dougherty has shown that cation-x interactions can stabilize both ground and transition states (44), and has used these results to predict the involvement of aromatic sidechains in receptors and enzymes that operate on cationic species (45,46). In the structural realm, the widespread occurrence of amino-aromatic interactions have been noted (47). In addition, a cocrystal structure shows that the myeloma protein McPC603 interacts with tile quaternary ammonium ion of its ligand phosphorylcholine through the... 

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