Preparation and characterization of a novel optical chemical sensor for determination of trace amounts of Praseodymium ion by UV/Vis spectrophotometry

Abstract

In the present work, a novel optical chemical sensor (optode) was prepared based on impregnation of N, N´-bis (salicylidene)-1, 3-ethylenediamine (BESA) Schiff base into mesoprous SBA-15 paste for determination of trace amounts of Praseodymium (Pr) ion by UV/Vis spectrophotometry. The sensor was fabricated by dip-coating triacetylcellulose membrane into indicator solution. The proposed optical sensor was prepared through a routine procedure and characterized by various techniques such as ATR-FT-IR and SEM analyses. This optode exhibited a linear range of 10 to 190 ng mL-1 for Pr(III) ion concentration with a detection limit of 5.0 ng mL-1. The value of the response time for the newly synthesized optode was within 100 s while depending on the Pr(III) ion concentration. The proposed optode showed low detection limit, fast response time and high selectivity with respect to the group of transition metal ions (Ce 3+ , Nb 3+ , La 3+ , Cr 3+ , Zn 2+ , Hg 2+ , and Fe 2+ ions). The optode was successfully regenerated with a mixture of thiourea and NaOH solution and the response was reversible with the relative standard deviation (R.S.D.) of 1.6%. The optode was stable and stored for at least 17 days without any considerable change in its sensitivity. Finally, the developed optode was applied to determine the Pr(III) ions in spiked samples.

Design of a novel optical sensor for determination of trace amounts of copper by UV–visible spectrophotometry in real samples

“…Various chemical and physical methods have been used for immobilization of indicators for optodes. Reagent immobilization is accomplished by physical entrapment, sol–gel, multilayered films or chemical (covalent) bonding methods . In the structure of optodes, ionophores play a main role.…”

Interfacial Assembly of Mesoporous Silica‐Based Optical Heterostructures for Sensing Applications

“…Live cell imaging experiments demonstrated their superior performance for intracellular Cu 2+ bioimaging. Zare‐Dorabei and Dashtian prepared a novel praseodymium (Pr) optical sensor through the functionalization of mesoporous SBA‐15 silica with N , N ´‐bis(salicylidene)‐1,3‐ethylenediamine via Schiff base reaction . Upon addition of Pr 3+ , the Schiff base derivative on the mesoporous framework could coordinate with Pr 3+ (Figure b).…”

“…b) Sensing mechanism of Schiff‐base‐modified mesoporous SBA‐15 for determination of trace amounts of Pr (III) ion by UV/vis spectrophotometry. Reproduced with permission . Copyright 2017, Elsevier.…”

“…Zare-Dorabei and Dashtian prepared a novel praseodymium (Pr) optical sensor through the functionalization of mesoporous SBA-15 silica with N,N´bis(salicylidene)-1,3-ethylenediamine via Schiff base reaction. [22] Upon addition of Pr 3+ , the Schiff base derivative on the mesoporous framework could coordinate with Pr 3+ (Figure 3b). The metal coordination was formed which caused the change of the absorption spectrum of the MSM.…”

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

“…In addition, optical methods can be operated in a “stand‐off” mode where the analyte and the sensing material are separated from each other during measurement. A variety of optical spectroscopy techniques, including UV–vis, photoluminescence, fluorescence, reflectance, and infrared (IR), have been employed in chemical sensing. Surface‐enhanced Raman spectroscopy (SERSpectroscopy), which has been demonstrated to detect down to the single molecule level with high specificity, has also attracted much attention.…”