Molecule modification and mass deposition induced by the implantation of low energy Fe^+ ion beams into amino acids

作     者：YUAN Shibin WEI Zengquan GAO Qingxiang 

作者机构：Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China College of Bio-SciencesLanzhou UniversityLanzhou 730000China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2002年第47卷第8期

页      面：672-676页

核心收录：

学科分类：071011[理学-生物物理学] 0710[理学-生物学] 07[理学] 

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No.19975060) the Scientific Foundation of "95" Fundamental Research from the Chinese Academy of Sciences (Grant No. KJ952-S1-424) 

主　　题：L(+)-cysteine low energy Fe+ ion beams mass deposition molecule modification single crystal the X-ray diffraction infrared spectroscopy. 

摘      要：Fe+ ion beams with the energy of 110 keV were implanted into films of L(+)-cysteine (HSCH2CH(NH2)COOH). One of the single crystals grown in hydrochloric acid solution with the implanted samples through slow evaporation was structurally characterized by the X-ray crystallography. The crystal is monoclinic, space group C2, with a = 1.8534(4) nm, b=0.5234(1) nm, c = 0.7212(1) nm, β=103.722°, V = 0.67965(3) nm3, Z = 4, F(000) = 144.0, Dclac = 1.763 g·cm-3, μ (MoKa) = 1.06 mm-1, T = 293(2) K.R = 0.0379, wR = 0.0835 for 660 observed reflections (I2σ(I)). The structural formula of the crystal compound is (CH2CH(NH2)NO2)ClFe (Mr = 180.38u). Products of heavy ion beam irradiation were purified and it was directly confirmed that the implanted Fe+ ions had been deposited in the novel molecules. The same doses of Fe+ ion beams of the same energy were implanted into films of L(+)-cysteine hydrochloride monohydrate. FTIR spectroscopy of the implanted samples proved that some of the original molecules were