Holmium(III)-selective fluorimetric optode based on N,N-bis(salicylidene)-naphthylene-1,8-diamine as a neutral fluorogenic ionophore

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• 作者：Mohammad Reza Ganjali ; Morteza Hosseini ; Anahita Karimi ; Hedieh Haji-Hashemi ; Masoud Salavati-Niasari ; Parviz Norouzi
• 关键词：Optode ; PVC membrane ; Fluorescence quenching ; Ho(III) ; Sensor
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：5 March, 2014
• 年：2014
• 卷：121
• 期：Complete
• 页码：224-229
• 全文大小：572 K

文摘

For the first time a highly sensitive and selective fluorimetric optode for determination of trace amounts of Ho³⁺ ions was prepared. The sensing system was prepared by incorporating of N,N-bis(salicylidene)-naphthylene-1,8-diamine (L) as a neutral Ho³⁺-selective fluoroionophore, in a plasticized PVC membrane containing sodium tetraphenyl borate as a lipophilic anionic additive. The response of the sensor is based on the strong fluorescence quenching of L by Ho³⁺ ions. At pH 5.4, the proposed sensor displays a calibration curve over a wide concentration range of 1.0 脳 10^鈭?0-1.0 脳 10^鈭? M, with a relatively fast response time of less than 1 min. In addition to high stability, high reproducibility and a relatively long working lifetime, the sensor shows a good selectivity towards Ho³⁺ ion with respect to common coexisting cations. The fluorescence optode was applied to determination of holmium ion contents of water samples.