Isatin N-phenylsemicarbazone: effect of substituents and concentration on anion sensing selectivity and sensitivity
作者:Marek Cigáň、Klaudia Jakusová、Jana Donovalová、Vojtech Szöcs、Anton Gáplovský
DOI:10.1039/c4ra04847d
日期:——
The effect of substituent and concentration on anion sensing selectivity and sensitivity of nine new easily synthesized isatin N-phenylsemicarbazone E-isomer sensors IIIa–XIa was investigated. The substantial difference between the association constants for IIIa–XIa interaction with strongly and weakly basic anions allows detection of F− or CH3COO− anions even at high weakly basic anion excess. Substitution
取代基和浓度对阴离子传感选择性和九个新的靛红容易地合成灵敏度的效果Ñ -phenylsemicarbazone Ë异构体传感器IIIA-XIa的进行了研究。为缔合常数之间的显着差异IIIA-XIa的具有强和弱碱性阴离子相互作用允许的F检测-或CH 3 COO -的阴离子,即使在高的弱碱性阴离子过量。异丁嗪环的5位取代环和苯环上对环的对位取代会影响传感器:阴离子络合物的化学计量,进而影响传感器的灵敏度。检出限3–4×10-7摩尔分米-3与F -和CH 3 COO -由传感器阴离子IVA和Va的轴承吸电子取代基是在有机溶剂中这些阴离子的最低公布检测限之间。高选择性和传感器的灵敏度经由允许自信˚F -在耐受氟化物的饮用水电平检测。溶液稀释导致传感器选择性的巨大变化。因此,一种E-异构体可用于感测强碱性和弱碱性阴离子。在另一侧上,传感器更高的溶液浓度增加在F -和CH 3COO -阴离子的检测范围中,类似于附加Ž