NOVEL GRAPHITE INTERCALATION COMPOUNDS CONTAINING FLUORINE, THEIR PROPERTIES AND MANIFESTATION OF FUNCTIONALITY.

1.氟-石墨层间化合物C_xF随着反应温度的降低，氟层间化合物C_xF的插层速率增加，在较低的温度范围（RT -78 ℃）下，长时间（14-140天）可形成组成范围较宽（3<x<13）的C_xF。在SbF_3或HF存在下，插层速率比纯氟快得多，反应时间小于7天即可形成C_xF（3<x<13）。2. C_xF的结构和C-F键的性质低氟含量的C_xF的插层厚度d_i为2.7埃/cm ~ 2，表明插层物种是氟离子，并且位于石墨层之间的中间。当氟含量超过C_6F时，C-F键的性质由离子型变为半离子型，第二级C_xF的单位周期I_c变为10.6A ^^Ω。这表明插入的氟原子不是在石墨层之间的中间位置。3.电荷转移和面内电导率 ...更多信息 &gt; <ab>C_xF的σ_值随着氟含量的增加而增加，并在x=8.4时显示最大值（σ_<ab>= 2.25x10^5 S/cm）。最大值为ca。比原始石墨晶体高10倍。在达到最大值后，σ_<ab>i随氟含量的增加而减小，含半离子C-F键的富氟C_xF（x&lt;3）几乎是绝缘体，这是由于半离子C-F键的形成使π电子局域化。通过对二级化合物C_ F的反射光谱的定性分析，推断出其某些物理性质<6.1>。费米能级为0.72eV，碳原子电荷转移和氟原子电荷转移分别为0.01和0.07。4.第一阶段氟砷酸石墨的有序-无序转变。第一阶段氟砷酸石墨层间化合物C_ AsF_6的Guinier-Simon X射线衍射数据<16>表明，它在约400 ℃发生了有序-无序转变。170 K时，AsF_6^-阴离子的F-配体位于石墨层的碳原子六边形中，低温相的阴离子具有三维有序性。少

1.Fluorine-Graphite Intercalation Compounds C_xF The rate of fluorine intercalation increases with decreasing reaction temperature, and C_xF with the wide composition range (3<x<13) are formed by long reaction times (14-140 days) at a low temperature range (RT - -78ﾟC). The rate of intercalation in the presence of SbF_3 or HF is much faster then that of pure fluorine, and C_xF (3<x<13) are formed by a shorter reaction time than 7 days.2.Structure of C_xF and Nature of C-F bond The intercalate thickness d_i of C_xF with lower fluorine content than x=6 is 2.7 A^^ﾟ, indicating that intercalated species are fluoride ion and are in the midway between graphite galleries. When the fluorine content exceeds that of C_6F, the nature of C-F bond varies from ionic to semi-ionic and the identity period I_c of stage-2 C_xF becomes 10.6 A^^ﾟ. This suggests that intercalated fluorine atoms are not in the midway between graphite galleries.3.Charge Transfer and In-Plane Electrical Conductivity sigma_<ab … More > Values of sigma_<ab> of C_xF increase with increasing fluorine content and show the maximum (sigma_<ab> = 2.25x10^5 S/cm) at x=8.4. The maximum value is ca. 10 times higher than that of pristine graphite crystal. After the maximum, sigma_<ab> decrease with increasing fluorine content and the fluorine-rich C_xF (x<3) with semi-ionic C-F bond are almost insulators because of pi-electron localization by the semi-ionic C-F bond formation. The some physical properties are deduced by the qualitative analysis of reflectance spectra for stage-2 compound C_<6.1>F. The fermi energy is 0.72 eV, and the charge transfer per carbon atom and the charge transfer per fluorine atom are 0.01 and 0.07, respectively.4.The Order-Disorder Transition of Stage-1 Graphite Fluoroarsenate. Guinier-Simon X-ray diffraction date for the stage-1 graphite fluoroarsenate intercalation compound, C_<16>AsF_6, indicate that it undergoes an order-disorder transition at ca. 170 K and has the F-ligands of AsF_6^- anions nestled in contiguous three-fold sets of carbon-atom hexagons of the enclosing graphite layers with 3-dimensional ordering of the anions in the low temperature phase. Less