20-triphenylporphine (DTPP), and its application for preparation of a Hg(II)-sensitive optical fiber chemical sensor are described. The response of the sensor is based on the fluorescence quenching of DTPP by coordination with Hg(II). The porphyrin dimer-based sensor shows a linear response toward Hg(II) in the concentration range 5.2 x 10(-7)-3.1 x 10(-4) mol x L(-1), with a working pH range from 2.4 to
新型
氟离子载体5-p-[[[4-(10',15',20'-三苯基-5'-porphinato)苯氧基] -1-丁氧基]苯基-10,15,20-三苯基
卟啉(D
TPP)的合成),及其在制备Hg(II)敏感型光纤
化学传感器中的应用。传感器的响应基于与Hg(II)协同作用的D
TPP的荧光猝灭。基于
卟啉二聚体的传感器在5.2 x 10(-7)-3.1 x 10(-4)mol x L(-1)的浓度范围内,对Hg(II)表现出线性响应,工作pH范围为2.4至8.0。该传感器对Hg(II)的选择性优于过渡
金属阳离子,包括Cd(II),Co(II),Cu(II),Ni(II),Pb(II),Zn(II)和Fe(III) 。作为感应剂 与
卟啉单体或
金属
卟啉相比,
卟啉二聚体对Hg(II)的荧光响应特性明显更好。研究了传感器膜组成的影响,并优化了实验条件。该传感器已用于测定
水样中的Hg(II)。