A NOVEL ULTRASENSITIVE COLORIMETRIC CHEMOSENSOR: BROMO PYROGALLOL RED BASED CHEMOSENSORS FOR MOLYBDENUM AND CARBONATE IONS

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TAVALLALI HOSSEIN; DEILAMIRAD GOHAR; GHANBARI SAMIRA

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Seminar Paper

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Seminar: IRANIAN CHEMISTRY CONGRESS
Year:2014 | Issue:17

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Title

A NOVEL ULTRASENSITIVE COLORIMETRIC CHEMOSENSOR: BROMO PYROGALLOL RED BASED CHEMOSENSORS FOR MOLYBDENUM AND CARBONATE IONS

Author(s)

TAVALLALI HOSSEIN | DEILAMIRAD GOHAR | GHANBARI SAMIRA | Issue Writer Certificate

Keywords

BROMO PYROGALLOL RED

COLORIMETRIC CHEMOSENSOR

MOLYBDENUM

CARBONATE

Abstract

BACKGROUND: MOLYBDENUM IS AN ESSENTIAL TRACE ELEMENT FOR BOTH PLANTS AND ANIMALS, INCLUDING HUMANS, FIRST OF ALL BECAUSE IT PLAYS AN IMPORTANT ROLE IN ENZYMATIC REDOX REACTIONS. NEVERTHELESS, IT IS HARMFUL AT HIGHER CONTENTS, SO MONITORING THE MOLYBDENUM CONTENT IN ENVIRONMENTAL SAMPLES IS DESIRABLE AND HIGHLY RECOMMENDED [1]. CARBONATE COMPOUNDS ARE USED EXTENSIVELY IN THE MANUFACTURING OF GLASS, PAPER, RAYON, SOAPS, DETERGENTS AND FOR DYING PROCESSES IN TEXTILE INDUSTRIES. CARBONATE IS ONLY SLIGHTLY TOXIC, BUT LARGE DOSES ARE CORROSIVE TO THE GASTRO-INTESTINAL TRACT WHERE SYMPTOMS MAY INCLUDE SEVERE ABDOMINAL PAIN, VOMITING, DIARRHEA, COLLAPSE AND DEATH [2]. A NUMBER OF METHODS SUCH AS FOURIER TRANSFORM INFRARED SPECTROSCOPY, PASSIVE ACOUSTIC EMISSION, GAS CHROMATOGRAPHY AND ACOUSTIC WAVE IMPEDANCE SENSOR HAVE BEEN DEVELOPED FOR THE QUANTIFICATION OF CARBONATE [3]. HOWEVER, MAINTENANCE AND OPERATIONAL COST OF THESE TECHNIQUES ARE HIGH AND REQUIRE ADEQUATE EXPERTISE. THEREFORE, THE ANALYSIS IS MOSTLY LIMITED TO LABORATORY LEVEL ONLY.METHODS: IN THIS CONTEXT WE HAVE SHOWN THAT THE BROMO PYROGALLOL RED (BPR) IS HIGHLY SELECTIVE AND SENSITIVE CHEMOSENSOR FOR MO (VI) ION IRRESPECTIVE OF OTHER METAL IONS AS DETECTED BY ‘NAKED-EYE’ COLOR CHANGE AND UV-VIS SPECTRAL CHANGES. WE HAVE ALSO REPORTED THE CARBONATE IONS EFFECT IN ‘NAKED-EYE’ COLOR CHANGE AS WELL AS IN UV-VIS SPECTRAL CHANGES.RESULTS: NEW SIMPLE COLORIMETRIC CHEMOSENSORS, (BPR AND BPR-MO COMPLEX) HAVE BEEN CHARACTERIZED BY SPECTROSCOPIC TECHNIQUES. CATION AND ANION BINDING STUDIES CARRIED OUT USING UV-VISIBLE SPECTROPHOTOMETRIC TITRATIONS REVEALED THAT THESE RECEPTORS EXHIBIT SELECTIVE RECOGNITION TOWARDS MO6+ AND CO32- OVER OTHER IONS IN DMSO/H2O (50: 50 V/V) MEDIA.CONCLUSION: A RELIABLE, LOW COST, QUICK AND PORTABLE ANALYTICAL TECHNIQUE IS THE NEED OF THE DAY, ESPECIALLY FOR THE ANALYSIS OF LARGE NUMBER OF SAMPLES IN THE FIELD AND SUCH REQUIREMENTS ARE GREATLY MET WITH ION SENSORS. TAKING THIS DILEMMA INTO CONSIDERATION RECENTLY, WE HAVE UNDERTAKEN AN EXTENSIVE RESEARCH PROGRAM TO EXPLORE EASILY AVAILABLE DYES DEMONSTRATED A HIGH CHROMOGENIC RECEPTOR FOR CATIONS AND ANIONS [4]. BPR HAS BEEN IDENTIFIED AS HIGHLY SENSITIVE PROBE FOR MO6+WHICH RESPONDS AT 0.05 M MOL L-1 CONCENTRATION LEVELS. THE COMPLEX OF MO6+ WITH BPR ALSO DISPLAYED ABILITY TO DETECT UP TO 0.15 MMOL L-1 CO32-. AMONG OTHER COMPETING ANIONS THROUGH A FAST RESPONSE TIME OF LESS THAN 40 S WHICH IS MUCH LOWER THAN MOST RECENTLY REPORTED CHROMOGENIC PROBES. THIS METHOD COULD HAVE POTENTIAL APPLICATION IN A VARIETY OF CASES REQUIRING RAPID AND ACCURATE ANALYSIS OF MO6+ AND CO32- FOR REAL SAMPLES.

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APA: Copy

TAVALLALI, HOSSEIN, DEILAMIRAD, GOHAR, & GHANBARI, SAMIRA. (2014). A NOVEL ULTRASENSITIVE COLORIMETRIC CHEMOSENSOR: BROMO PYROGALLOL RED BASED CHEMOSENSORS FOR MOLYBDENUM AND CARBONATE IONS. IRANIAN CHEMISTRY CONGRESS. SID. https://sid.ir/paper/912245/en

Vancouver: Copy

TAVALLALI HOSSEIN, DEILAMIRAD GOHAR, GHANBARI SAMIRA. A NOVEL ULTRASENSITIVE COLORIMETRIC CHEMOSENSOR: BROMO PYROGALLOL RED BASED CHEMOSENSORS FOR MOLYBDENUM AND CARBONATE IONS. 2014. Available from: https://sid.ir/paper/912245/en

IEEE: Copy

HOSSEIN TAVALLALI, GOHAR DEILAMIRAD, and SAMIRA GHANBARI, “A NOVEL ULTRASENSITIVE COLORIMETRIC CHEMOSENSOR: BROMO PYROGALLOL RED BASED CHEMOSENSORS FOR MOLYBDENUM AND CARBONATE IONS,” presented at the IRANIAN CHEMISTRY CONGRESS. 2014, [Online]. Available: https://sid.ir/paper/912245/en

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