Surface Modification of Diamond by Organic Reactions for Preparation of Advanced Functional Devise

以2，2‘-偶氮二异丁腈无水氯仿溶液为引发剂，硫酰氯为氯化试剂，在323K、Ar气氛下对氢化金刚石粉进行了处理。在氯化过程之后，溶液被彻底蒸发，并在不暴露于空气的情况下加入正丁胺。然后在303K下对金刚石进行丁胺处理1~24 h，处理后的金刚石粉末用四氢呋喃和水洗涤去除副产物，并用红外光谱和闪速热解进行表征。结果表明，氢化金刚石表面是通过液相中的自由基反应进行修饰的。用乙二胺、丙胺、三乙胺或苯乙胺处理氯化钻石也得到了类似的结果。氯化钻石也用正丁基锂、叠氮化钠、甲醇钠或乙醇钠作为亲核剂处理。FTIR和ESCA没有证实金刚石表面有丁基、叠氮基、甲氧基和乙氧基的形成，这可能是由于金刚石的氯化程度不够所致。在气相中直接氯化金刚石是为了促进官能团与氯化金刚石表面碳之间的共价键。

Hydrogenated diamond powder was treated with an anhydrous chloroform solution of 2, 2'-azobisisobutyronitrile as the radical initiator and sulfuryl chloride as the chlorination reagent at 323 K under an Ar atmosphere. After the chlorination process, the solution was exhaustively evaporated and n-butylamine was added without exposure to air. The diamond was then butylaminated at 303 K for 1-24 h. The treated diamond powder was washed with tetrahydrofuran and water to remove by-products, and characterized by infrared spectroscopy and flash pyrolysis. It could be confirmed that the hydrogenated diamond surface was modified by the radical reactions in the liquid phase. The similar results were obtained by using ethylenediamine, propylamine, triethylamine or phenethylamine.Chlorinated diamond was also treated with n-butyllithium, sodium azide, sodium methoxide or sodium ethoxide as the nucleophilic reagent. The formation of butyl, azide, methoxy and ethoxy groups on the diamond surface was not confirmed with FTIR and ESCA.The results might be due to the insufficient chlorination of diamond. Direct chlorination of diamond in the gas phase is carried out for the promoting covalent bonds between functional groups and carbon on the chlorinated diamond surface.