358351-52-7Relevant academic research and scientific papers
Amphiphilic fullerene-cholesterol derivatives: Synthesis and preparation of Langmuir and Langmuir-Blodgett films
Felder, Delphine,Del Pilar Carreon, Maria,Gallani, Jean-Louis,Guillon, Daniel,Nierengarten, Jean-Francois,Chuard, Thierry,Deschenaux, Robert
, p. 1119 - 1132 (2001)
Amphiphilic fullerene bis-adducts 11 and 14 containing two and four cholesterol moieties, respectively, were prepared starting from the corresponding bis-malonate derivatives. In a systematic study, their spreading behavior at the air-water interface was compared to that of bis-adduct 6 with no polar head-group. Compared to 6, for which some three-dimensional aggregation occurs, the polar head-group in 11 and 14 is responsible for an attractive interaction with the aqueous subphase, forcing the molecules towards the water surface into a two-dimensional arrangement. Even if homogeneous Langmuir films were obtained with both 11 and 14, only the films of 14 show a reversible compression/expansion behavior. This suggests that, by increasing the number of cholesterol subunits, the encapsulation of the C-sphere in its addend is more efficient, thus preventing fullerene-fullerene interactions and aggregation phenomena. The Langmuir films of 11 and 14 were also efficiently transferred onto hydrophilic quartz slides, yielding Langmuir-Blodgett films.
The influence of linker geometry in bis(3-hydroxy-N-methyl-pyridin-2-one) ligands on solution phase uranyl affinity
Szigethy, Geza,Raymond, Kenneth N.
supporting information; experimental part, p. 1818 - 1827 (2011/03/21)
Seven water-soluble, tetradentate bis(3-hydroxy-N-methyl-pyridin-2-one) (bis-Me-3,2-HOPO) ligands were synthesized that vary only in linker geometry and rigidity. Solution-phase thermodynamic measurements were conducted between pHa 1.6 and pHa 9.0 to dete
