Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Chinese Journal of Chemistry called Phase Behaviors of Multi-tailed B2AB2-Type Regio-isomeric Giant Surfactants at the Columnar-Spherical Boundary, Author is Shao, Yu; Han, Di; Yan, Xiaojin; Hou, Bo; Li, Yiwen; He, Jinlin; Fu, Qiang; Zhang, Wen-Bin, which mentions a compound: 2834-05-1, SMILESS is O=C(O)CCCCCCCCCCBr, Molecular C11H21BrO2, COA of Formula: C11H21BrO2.
We report herein the precision synthesis and phase behaviors of multi-tailed B2AB2-type regio-isomeric giant surfactants consisting of a hydrophilic polyhedral oligomeric silsesquioxane (POSS) head tethered with four hydrophobic polystyrene (PS) tails. The synthesis was accomplished through two sequential “”click”” reactions to give a series of regio-isomeric giant surfactants S2DS2 (where S is short for PS tails and D for hydroxyl-functionalized POSS) in para-, meta-, and ortho-configurations. Their phase structures and phase behaviors at the columnar-spherical boundary were investigated with a single PS tail mol. weight of 1.4 kDa. Specifically, the para- and meta-isomers show hexagonally packed cylinders phases with slightly different order-disorder transition temperatures (~120°C and ~130°C) and the ortho-isomer exhibits an order-order transition from a kinetically favored, metastable do decagonal quasi-crystal phase to a thermodynamically stable sigma phase at ~120°C, as well as a further transition into the disordered state at ~140°C. The phase diagram was constructed and their differences were rationalized based on the calculated interfacial area per mol. This work demonstrates that tiny structural disparity could not only lead to unconventional phase formation in single-component macromols., but also render dynamic and rich phase behaviors in these macromol. assemblies.
In some applications, this compound(2834-05-1)COA of Formula: C11H21BrO2 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.
Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI