c-f的翻译

In EIMS there are many frame-rearrangement ion peaks. The cleavage of C-O, C-F. C-CF3 bonds and the formation of five-or four-membered heterocyclic ring ions containing nitrogen by losing CO are major mass spectrometric characters.

在EIMS中，均存在较多的骨架重排离子峰，其中C O，C F，C CF3，键断裂及失去CO形成的五元，四元含氮杂环离子是重要质谱特征。

The carrier injection process of polymer light-emitting diodes ( PLEDs) with MEH-PPV ( poly [ 2-methoxy, 5-( 2-ethylhexoxy)-1,4-phenylene vinylene]) as the light-emitting layer, was investigated using impedance spectroscopy, capacitance-voltage ( C-V) and capacitance-frequency ( C-F) techniques.

采用交流阻抗谱，电容-电压，电容-频率等实验方法，研究了共轭高分子MEH-PPV（poly[2-methoxy，5-（2-ethylhexoxy）-1,4-phenylene vinylene]）发光二极管的载流子注入过程。

Results show that the C-H bonds disappeared and the C-F bonds gradually increased in the process of reaction, the plane structure of mesophase pitch molecule was destroyed and distortion molecule construction of pitch fluoride was formed.

结果表明：随着氟化反应的进行C-H键消失，C-F键形成并逐渐增加；中间相沥青中原有的大分子平面芳烃结构被破坏。