Solid-Contact Perchlorate Sensor with Nanomolar Detection Limit Based on Cobalt Phthalocyanine Ionophores Covalently Attached to Polyacrylamide

Abstract

Novel solid-contact perchlorate sensors based on cobalt phthalocyanine-C-monocarboxylic acid (I), and cobalt phthalocyanine-C,C,C,C-tetracarboxylic acid (II) as free ionophores and covalently attached to polyacrylamide (PAA)-ionophores III and IV, respectively were prepared. The all solid-state sensors were constructed by the application of a thin film of a polymer cocktail containing a phthalocyanine ionophore and cetyltrimethylammonium bromide (CTMAB) as a lipophilic cationic additive onto a gold electrode precoated with the conducting polymer poly (3,4-ethylenedioxythiophene) (PEDOT) as an ion and electron transducer. The sensor with 10.3% of ionophore (III) covalently attached to plasticizer-free poly (butyl methacrylate-co-dodecyl methacrylate) (PBDA) exhibited a good selectivity for perchlorate and discriminated many ions, in- -2 mol·L -1 with a lower detection limit (LDL) of 1 × 10 -9 mol·L -1 and gave a stable response over a pH range of 4 -10.5. The all-solid state sensors were utilized for the selective flow injection potentiometric determination of perchlorate in natural water and human urine samples in the nanomolar concentration range.

Investigation of structural, optical and electrical properties of a new cobalt phthalocyanine thin films with potential applications in perchlorate sensor

“…The phthalocyanine molecule ( Fig. 1) used in this work was synthesized and purified according to the synthesis route reported earlier in our previous works [13].…”

Development of a capacitive chemical sensor based on Co(II)-phthalocyanine acrylate-polymer/HfO<sub>2</sub>/SiO<sub>2</sub>/Si for detection of perchlorate

“…The new cobalt phthalocyanine-C-monoamido-butyl acrylate carboxyl acid (Co(II)Pc-AP) molecules (Fig. 1a) used in this work have been synthesized and purified according to the method described in the reference (Abbas et al, 2011). The phosphate buffer saline (PBS) solution ischaracterized by a concentration of 0.01 M and pH = 7.…”

(24-Сrown-8)-Linked Dimeric Phthalocyanines and Their Metal Complexes

“…[7][8][9][10][11][12][13][14] The stability of metal complexes with these classes of ligands allows to mention them as promising molecules for the development of novel homogeneous catalysts [15][16][17][18][19] as well as efficient receptors and sensors. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] The dimeric phthalocyanines, linked by rigid or labile linker are in the scope of modern research. [8,10] The origin of the linker, its geometry and rigidity allows development of ditopic molecules with particular arrangement of phthalocyanine fragments -linear, angular or cofacial.…”