The reaction between perfluoroalkanesulfinate salts(1)[R_fSO_2M R_f=a,Cl(CF_2)_4;b,Cl(CF_2)_6;c,Cl(CF_2)8;d,n-C_6F_(13);e,n-C_8F_(17);M-Na;K; Hg(I)]and iodine monochloride in dichloromethane at low temperature(e.g. -3...The reaction between perfluoroalkanesulfinate salts(1)[R_fSO_2M R_f=a,Cl(CF_2)_4;b,Cl(CF_2)_6;c,Cl(CF_2)8;d,n-C_6F_(13);e,n-C_8F_(17);M-Na;K; Hg(I)]and iodine monochloride in dichloromethane at low temperature(e.g. -30--50℃)resulted in the formation of the corresponding perfluoroalkane- sulfonyl iodides(2),which were identified by their 19_F NMR spectra.The perfluoroalkanesulfonyl iodides generated in situ reacted smoothly with olefins to forum 1:1 adducts with good yields.Thus,these reactions provide another method for the synthesis of the very unstable perfluoroalkanesulfonyl iodide.展开更多
射频识别技术应用广泛,如二代身份证、一卡通、电子门票,该文将RFID技术用于校园卡,根据RFID工作原理和MF1 IC S50卡的存取控制原理,采用频段为13.56HZ的高频MF1 IC S50卡,选用Python语言和MySql数据库,设计和实现了包括波特率设置、数...射频识别技术应用广泛,如二代身份证、一卡通、电子门票,该文将RFID技术用于校园卡,根据RFID工作原理和MF1 IC S50卡的存取控制原理,采用频段为13.56HZ的高频MF1 IC S50卡,选用Python语言和MySql数据库,设计和实现了包括波特率设置、数据库连接及充值的一款校园卡,并测试成功,对各类RFID会员卡的实现有一定的参考价值。展开更多
文摘The reaction between perfluoroalkanesulfinate salts(1)[R_fSO_2M R_f=a,Cl(CF_2)_4;b,Cl(CF_2)_6;c,Cl(CF_2)8;d,n-C_6F_(13);e,n-C_8F_(17);M-Na;K; Hg(I)]and iodine monochloride in dichloromethane at low temperature(e.g. -30--50℃)resulted in the formation of the corresponding perfluoroalkane- sulfonyl iodides(2),which were identified by their 19_F NMR spectra.The perfluoroalkanesulfonyl iodides generated in situ reacted smoothly with olefins to forum 1:1 adducts with good yields.Thus,these reactions provide another method for the synthesis of the very unstable perfluoroalkanesulfonyl iodide.
文摘射频识别技术应用广泛,如二代身份证、一卡通、电子门票,该文将RFID技术用于校园卡,根据RFID工作原理和MF1 IC S50卡的存取控制原理,采用频段为13.56HZ的高频MF1 IC S50卡,选用Python语言和MySql数据库,设计和实现了包括波特率设置、数据库连接及充值的一款校园卡,并测试成功,对各类RFID会员卡的实现有一定的参考价值。
