1078725-17-3Relevant academic research and scientific papers
Synthesis and liquid crystalline properties of novel fluorinated N-benzoyl thiourea compounds. Effect of perfluoroalkyl chains on the thermal behavior and smectic phases stability
Ili?, Monica,Micutz, Marin,Pasuk, Iuliana,Staicu, Teodora,C?rcu, Viorel
, p. 84 - 89 (2017)
A series of novel N-benzoyl-N’-aryl thiourea derivatives (BTU) bearing different number of alkoxy groups in terminal positions of benzoyl unit and a perfluorooctyl group on the other side have been designed and prepared. Their liquid crystalline properties were investigated by a combination of three techniques: polarizing optical microscopy (POM), differential scanning calorimetry (DSC) and variable-temperature powder X-ray diffraction (XRD). Their thermal stability was studied by thermogravimetric analysis (TG). It was found that only the compounds which have only one alkoxy chain attached to benzoyl unit, 1a and 1b, show calamitic mesomorphic behavior, with smectic A and C phases being displayed. The type and stability of these mesophases are greatly influenced by the alkyl chain length as well as by the presence of perfluorooctyl group. The clearing and the mesophase ranges are significantly increased with the incorporation of perfluoroalkyl chains when compared to non-fluorinated analogues, with almost 40 °C. The attachment of additional alkoxy groups on the benzoyl moiety led to a significant decrease of the clearing points and suppression of the mesogenic character.
Stable functionalized PEGylated quantum dots micelles with a controlled stoichiometry
Amela-Cortes, Marian,Roullier, Victor,Wolpert, Cecile,Neubauer, Stefanie,Kessler, Horst,Bedel, Olivier,Mignani, Serge,Marchi-Artzner, Valerie
supporting information; experimental part, p. 1246 - 1248 (2011/03/20)
Here we report the synthesis of monofunctional PEGylated amide ligands that were used to prepare bioactivable quantum dots of a 20 nm diameter with a controlled mean number of the covalently grafted ligands. They are stable in aqueous medium of high salin
