高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (12): 1642.

• 研究论文 • 上一篇    下一篇

模板分子TMEDA在CF-3及ZSM-39沸石笼中的位置及其与骨架的相互作用

孙尧俊1, 吴泰琉1, 王力平1, 费伦1, 龙英才2   

  1. 1. 复旦大学分析测试中心;
    2. 复旦大学化学系 上海 200433
  • 收稿日期:1993-03-31 修回日期:1993-06-05 出版日期:1993-12-24 发布日期:1993-12-24
  • 通讯作者: 龙英才.

Position and Interaction with Framework for Template Molecule Tetramethyl ethyl enediamine Trapped in Cage of Zeolite CF-3 and ZSM-39

SUN Yao-Jun1, WU Tai-Liu1, WANG Li-Ping1, FEI Lun1, LONG Ying-Cai2   

  1. 1. Center of Analysis and Measurement, Fudan University;
    2. Dept.of Chem., Fudan University, Shanghai, 200433
  • Received:1993-03-31 Revised:1993-06-05 Online:1993-12-24 Published:1993-12-24

摘要: 用XRD、FTIR、IG-DTA、13C魔角固体核磁共振表征了用四甲基乙基二胺(TMEDA)为结构异向剂合成的高硅沸石CF-3及ZSM-39.TMEDA不同基团的13C化学位移,共振峰相对强度在交叉极化(CP)及高功率去偶(HPDEC)核磁共振谱中的变化,揭示出模板分子在尺寸不同的沸石笼中的位置、运动状态及其与骨架的相互作用.在ZSM-39沸石中的TMEDA分子,它的-C2H4-基团13C共振峰明显窄化,向高场的异常位移以及它与-CH3基团13C共振峰相对强度在CP及HPDEC谱中的明显变化,说明为2个相邻的[51264]笼所共有的TMEDA分子,其-C2H4-基团与这2个笼所共用的六氧元环的氧原子有强烈的相互作用.

关键词: 模板分子, 四甲基乙基二胺, CF-3高硅沸石, ZSM-39, 13C魔角固体核磁共振

Abstract: XRD, FT-IR, TG-DTAand 13C MAS NMRhave been used to characterize silicon zeolite CF-3 and ZSM-39 hydrothermally crystallized in TMEDA-Na2O-SiO2-H2Osystem.The 13Cchemical shift and the relative intensity of resonance peak in CP (cross polarization) and HPDEC(high power decoupling) NMRspectra for different group of TMEDAreveal the position, the moving and the interaction with framework for the template molecule trapped in different size cages of zeolites.The narrowness, the unusual chemical shift to high field, and the obvious change of the intensity for the 13Cresonance peak of -C2H4- group related to that of -CH3 group in the CPand HPDECspectra, indicate that one molecule of TMEDAis shared by two neighbours of [51264] cage of ZSM-39 and that the -C2H4- group of TMEDAinteracts strongly with oxygen atoms locating at the 6-oxygen-membered ring between the two cages.

Key words: Template molecule, TMEDA, Silicon zeolite CF-3, ZSM-39, 13C MAS NMR

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