Synthesis and monolayer properties of double-chained phosphatidylcholines containing perfluoroalkyl groups of different length
作者:Katsuki Takai、Toshiyuki Takagi、Teruhiko Baba、Toshiyuki Kanamori
DOI:10.1016/j.jfluchem.2008.06.011
日期:2008.8
series of double-chained phosphatidylcholines (PCs), 1,2-dioctadec-9′-ynoyl-sn-glycero-3-phosphocholine analogs containing perfluoroalkyl moieties (CF3, C2F5, n-C4F9 or n-C8F17) as the terminal segment in two hydrophobic chains, 1a–d, were synthesized. Equilibrium spreading pressures of these fluorinated PCs at the air–water interface were measured as an indication of monolayer stability, in order to
一系列的双链磷脂酰胆碱(PCs),1,2-二十八烷基-9'-炔丙基-sn-甘油-3-磷酸胆碱类似物,含全氟烷基部分(CF 3,C 2 F 5,n- C 4 F 9或n - c ^ 8 ˚F 17),其在两个疏水链终端段,1A - d,被合成。测量这些氟化PC在空气-水界面的平衡扩散压力,作为单层稳定性的指标,以便在PC分子中获得最小的氟含量,以有效发挥单层稳定作用。单层稳定性随PC分子中的氟含量呈S形增加,随后在25°C时高于某个氟含量(即n- C 4 F 9部分)时趋于稳定。在这种条件下,双链PC分子的疏水末端末端的至少五个氢原子被氟原子取代,即CF 3 CF 2。需要具有“ R”部分的化合物来表现出单层稳定作用,而双链PC的进一步氟化(F(CF 2)n;n > 4)对单层稳定性的影响较小。