Fluorine-19 nuclear magnetic resonance at 235 MHz has been used to characterize the NMR properties of two novel fluorinated sterols, 6,6-difluorocholestanol and 7,7-difluorocholestanol, and various 3-ester derivatives. 19F-19F and 19F-1H coupling constants in chloroform are reported. 2H-NMR ...
Crystal structure was characterized by PXRD and Raman spectroscopy at room temperature [Empyrean (PANaytical) and NTEGRA (NT-MDT), respectively]. The temperature-dependent electrical properties were measured from 50 to 300 K using a physical property measurement system (Quantum Design). To measure ...
. As a result, there is a desire for fluorine-containing compositions which are effective in providing desired surfactant properties, and which eliminate more effectively from the body (including the tendency of the composition and its degradation products). It is expected that the fluorochemical ...
The resulting chains, with one and three fluorine atoms at their ends, respectively, were characterized using contact angle measurements, X-ray photoelectron spectroscopy (XPS), and Time-of-flight secondary ionization mass spectroscopy (TOFSIMS). The observed lowered surface tensions and results from ...
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A new method for studying the two-dimensional spreading properties and sealing characteristics of surfactant solution on oil surface was provided. The actual spreading situation of the C4-Br/oil systems in axisymmetric geometry was observed directly usin
By introducing fluorine﹕ubstituted salicylic acid ligand into the TOCs system, we synthesized [Ti7(3㎡)4(LF)4(iPrO)12]·2(CH3CN) (1; LF = 3‐fluorosalicylic acid) with an Anderson‐type related structure, which is already well known for other POMs. Additionally, introducing Cu ions ...
In particular, the pretreatment of Li metal anode can improve the interfacial wettability, and the synergy of the chemically pretreated Li metal anode surface and the GPE can electrochemically in situ generate SEI with compositionally stable and fluorine-rich inorganic components. Owing to these unique...
OPTICAL propertiesFLUORINEAiming at the low luminous‐efficiency of two‐dimensional (2D) perovskite, its quantum yield (QY) and stability are effectively improved by a fluorinated second insulator layer 3,4‐difluoroaniline (F2PA) outside of the first insulator 2‐(2,4‐difluoro...
Next, the piezoelectric properties of the polar α-phase P(VDF-TrFE) were compared with that of the β-phase by using a resonance-enhanced PFM. Ultrathin piezoelectric β-phase P(VDF-TrFE) films were fabricated on the Au-coated SiO2/Si substrates (Supplementary FigsS5–6). The schematic of...