^(19)F NMR Study on the Charge-Transfer Process between Ground-State Acceptor Fluoranil (or Pentafluorophenyl Carboxylate) and Some N-Alkylphenothiazine Donors

作     者：Hu Nan YI Ji Liang SHI Zhi Hai QIU Jia Yi XU Xi Kui JIANG(Shanghai Institute of organic Chemistry. Chinese Academy of Sciences. 354Fenglin Lu, Shanghai 200032) 

作者机构：Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：1999年第10卷第10期

页      面：839-842页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

主　　题：NMR charge-transfer chemical shift. 

摘      要：The line positions of 19F NMR absorption of fluoranil (TFQ) or pentafluorophenylcarboxylate (PFE-16) in the presence of N-alkylphenothiazine donors have been measured. By comparing the 19F chemical shift in C6D6 of TFQ or PFE-16 in the absence of the donor with thosein the presence of the donor. the difference of these chemical shifts was found to be large. In thepresence of the donor. 19F upheld shifts of TFQ or PFE-16 have been observed. The experimentalresults showed that there is a charge-transfer process between TFQ or PFE-16 and the donor .When TFQ or PFE-16 accepts the charge from the donor. its 19F resonance moves upfield.