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Özcan S, Uslu Kobak R, Budak O, KOCA ATIF, BAYIR ZEHRA. Synthesis, Electrochemistry, Spectroelectrochemistry, and Electrochromism of Metallophthalocyanines substituted with four (2,4,5‐trimethylphenyl)ethynyl groups. ELECTROANAL 2022. [DOI: 10.1002/elan.202100693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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de Diego Almeida RH, Monroy-Guzmán F, Arganis Juárez CR, Manríquez Rocha J, Bustos Bustos E. Electrochemical detector based on a modified graphite electrode with phthalocyanine for the elemental analysis of actinides. CHEMOSPHERE 2021; 276:130114. [PMID: 33706180 DOI: 10.1016/j.chemosphere.2021.130114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/11/2021] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
The quantification of actinides in aqueous solutions involves complex and expensive separation processes. Electrochemical methods have been widely used for the quick and accurate identification and quantification of organic and inorganic compounds directly or indirectly. Therefore, this work proposes the use of modified graphite with phthalocyanine for electrochemical detection and quantification of Th, U, Pu, Am, and Cm, in aqueous media by cyclic voltammetry. The electrodes were characterized by Raman and infrared spectroscopy, and the cyclic voltammetry data were modeled with Aoki's model. The detection limits (DL) and the quantification limits (QL) reached by the electrochemical detection of these actinides were of the order of ppt. Aoki's model fitted perfectly with the experimental data. The functionalization of graphite electrodes promotes the formation of phthalic anhydride, and the phthalocyanine is anchored on the epoxy groups of the graphite. The electrochemical detection process of these actinides is indirect. This electrochemical detector is cheap and disposable and can be an alternative for an initial characterization of actinides in liquid waste.
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Affiliation(s)
- Ruslán Heriberto de Diego Almeida
- National Institute of Nuclear Research (ININ), Carretera Mexico-Toluca S/N, La Marquesa, Ocoyoacac, Edo. De México, C.P. 52750, Mexico; Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C. (CIDETEQ), Parque Tecnológico Sanfandila, Sanfandila, Pedro Escobedo, 76703, Querétaro, Mexico.
| | - Fabiola Monroy-Guzmán
- National Institute of Nuclear Research (ININ), Carretera Mexico-Toluca S/N, La Marquesa, Ocoyoacac, Edo. De México, C.P. 52750, Mexico.
| | - Carlos Rosendo Arganis Juárez
- National Institute of Nuclear Research (ININ), Carretera Mexico-Toluca S/N, La Marquesa, Ocoyoacac, Edo. De México, C.P. 52750, Mexico.
| | - Juan Manríquez Rocha
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C. (CIDETEQ), Parque Tecnológico Sanfandila, Sanfandila, Pedro Escobedo, 76703, Querétaro, Mexico.
| | - Erika Bustos Bustos
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C. (CIDETEQ), Parque Tecnológico Sanfandila, Sanfandila, Pedro Escobedo, 76703, Querétaro, Mexico.
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Abstract
Metal phthalocyanines bearing electron-withdrawing fluorine substituents were synthesized a long time ago, but interest in the study of their films has emerged in recent decades. This is due to the fact that, unlike unsubstituted phthalocyanines, films of some fluorinated phthalocyanines exhibit the properties of n-type semiconductors, which makes them promising candidates for application in ambipolar transistors. Apart from this, it was shown that the introduction of fluorine substituents led to an increase in the sensitivity of phthalocyanine films to reducing gases. This review analyzes the state of research over the last fifteen years in the field of applications of fluoro-substituted metal phthalocyanines as active layers of gas sensors, with a primary focus on chemiresistive ones. The active layers on the basis of phthalocyanines with fluorine and fluorine-containing substituents of optical and quartz crystal microbalance sensors are also considered. Attention is paid to the analysis of the effect of molecular structure (central metal, number and type of fluorine substituent etc.) on sensor properties of fluorinated phthalocyanine films.
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Erzunov DA, Botnar AA, Domareva NP, Tikhomirova TV, Vashurin AS. Synthesis, Spectroscopic Properties and Redox Behavior Kinetics of Rare-Earth Bistetrakis-4-[3-(3,4-dicyanophenoxy)phenoxy]phthalocyaninato Metal Complexes with Er, Lu and Yb. Molecules 2021; 26:2181. [PMID: 33920084 PMCID: PMC8068851 DOI: 10.3390/molecules26082181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 11/17/2022] Open
Abstract
Novel bistetrakis-4-[3-(3,4-dicyanophenoxy)phenoxy]phthalocyaninato of complexes erbium, lutetium and ytterbium were synthesized using a template fusion method to prevent any polymerization process. The complexes were separated from the reaction mixtures and characterized by NMR, IR and electron absorption spectroscopy. The spectroscopic properties of the metal phthalocyaninates in chloroform, acetone and tetrahydrofuran were studied. The regular bathochromic shift in the Er-Yb-Lu series was determined. In acetone medium all the complexes obtained were found to exist in an equilibrium state between neutral and reduced forms. The linearity of Lambert-Bouger-Beer curves makes it possible to study the kinetics of redox processes in the presence of phenylhydrazine and bromine. The lutetium complex showed better reducing properties and turned fully into the reduced form, while the erbium and ytterbium ones changed only partially. Upon oxidizing all the phthalocyaninates transformed into a mixture of oxidized and neutral-radical forms. The extinction coefficients and effective redox constants were calculated.
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Affiliation(s)
- Dmitry A. Erzunov
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, 153000 Ivanovo, Russia; (A.A.B.); (N.P.D.); (T.V.T.); (A.S.V.)
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Analysis of Phenolic Content in Grape Seeds and Skins by Means of a Bio-Electronic Tongue. SENSORS 2020; 20:s20154176. [PMID: 32727151 PMCID: PMC7435477 DOI: 10.3390/s20154176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/21/2020] [Accepted: 07/24/2020] [Indexed: 11/16/2022]
Abstract
A bio-electronic tongue has been developed to evaluate the phenolic content of grape residues (seeds and skins) in a fast and easy way with industrial use in mind. A voltammetric electronic tongue has been designed based on carbon resin electrodes modified with tyrosinase combined with electron mediators. The presence of the phenoloxydase promotes the selectivity and specificity towards phenols. The results of multivariate analysis allowed discriminating seeds and skins according to their polyphenolic content. Partial least squares (PLS) has been used to establish regression models with parameters related to phenolic content measured by spectroscopic methods i.e., total poliphenol content (TPC) and Folin–Ciocalteu (FC) indexes. It has been shown that electronic tongue can be successfully used to predict parameters of interest with high correlation coefficients (higher than 0.99 in both calibration and prediction) and low residual errors. These values can even be improved using genetic algorithms for multivalent analysis. In this way, a fast and simple tool is available for the evaluation of these values. This advantage may be due to the fact that the electrochemical signals are directly related to the phenolic content.
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Ouedraogo S, Coulibaly T, Meunier-Prest R, Bayo-Bangoura M, Bouvet M. p-Type and n-type conductometric behaviors of octachloro-metallophthalocyanine-based heterojunctions, the key role of the metal. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In the present work, we determined the electrical properties of octachlorinated metallophthalocyanines with Co(II) and Cu(II) ions as metal centers. We engaged them in heterojunctions, with lutetium bisphthalocyanine as a partner. Surprisingly, cobalt and copper complexes show opposite behaviors, the first being an [Formula: see text]-type material whereas the latter is a [Formula: see text]-type material, as deduced from the response of the heterojunctions towards ammonia; showing the unusual key role played by the metal center. While the LuPc[Formula: see text]/Cu(Cl[Formula: see text]Pc) complex exhibits a negative response to ammonia, the LuPc[Formula: see text]/Co(Cl[Formula: see text]Pc) complex exhibits a positive response to ammonia, with a sensitivity of 1.47% ppm[Formula: see text] at concentrations lower than 10 ppm and a limit of detection of 250 ppb. All the devices operate at room temperature and in real atmosphere.
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Affiliation(s)
- Seydou Ouedraogo
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB), Université Bourgogne Franche-Comté, UMR CNRS 6302, 9 Avenue A. Savary, F-21078 Dijon, France
- Laboratoire de Chimie Moléculaire et de Matériaux, Université Joseph Ki-Zerbo, 03 BP 7021, Ouagadougou, Burkina Faso
| | - Tahirou Coulibaly
- Laboratoire de Chimie Moléculaire et de Matériaux, Université Joseph Ki-Zerbo, 03 BP 7021, Ouagadougou, Burkina Faso
| | - Rita Meunier-Prest
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB), Université Bourgogne Franche-Comté, UMR CNRS 6302, 9 Avenue A. Savary, F-21078 Dijon, France
| | - Mabinty Bayo-Bangoura
- Laboratoire de Chimie Moléculaire et de Matériaux, Université Joseph Ki-Zerbo, 03 BP 7021, Ouagadougou, Burkina Faso
| | - Marcel Bouvet
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB), Université Bourgogne Franche-Comté, UMR CNRS 6302, 9 Avenue A. Savary, F-21078 Dijon, France
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Pal C, Chambrier I, Cammidge AN, Sharma AK, Ray AK. Steady state charge conduction through solution processed liquid crystalline lanthanide bisphthalocyanine films. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In-plane electrical characteristics of non-peripherally octyl(C[Formula: see text]H[Formula: see text]- and hexyl(C[Formula: see text]H[Formula: see text]-substituted liquid crystalline (LC) double decker lanthanide bisphthalocyanine (LnPc[Formula: see text] complexes with central metal ions lutetium (Lu), and gadolinium (Gd) have been measured in thin film formulations on interdigitated gold (Au) electrodes for the applied voltage ([Formula: see text] range of [Formula: see text]. The conduction mechanism is found to be Ohmic within the bias of [Formula: see text] while the bulk limited Poole–Frenkel mechanism is responsible for the higher bias. The compounds show individual characteristics depending on the central metal ions, substituent chain lengths and their mesophases. Values of 67.55 [Formula: see text]cm[Formula: see text] and 42.31 [Formula: see text]cm[Formula: see text] have been obtained for room temperature in-plane Ohmic conductivity of as-deposited octyl lutetium (C[Formula: see text]LuPc[Formula: see text] and hexyl gadolinium (C[Formula: see text]GdPc[Formula: see text] films, respectively while C[Formula: see text]GdPc[Formula: see text] films exhibit nearly two orders of magnitude smaller conductivity. On annealing at 80[Formula: see text]C, Ohmic conductivities of C[Formula: see text]LuPc[Formula: see text] and C[Formula: see text]GdPc[Formula: see text] are found to have increased but the conductivity of C[Formula: see text]GdPc[Formula: see text] decreased by more than one order of magnitude to 1.5 [Formula: see text]cm[Formula: see text]. For physical interpretation of the charge transport behavior of these three molecules, their UV-vis optical absorption spectra in the solution and in as-deposited and annealed solid phases and atomic force microscopy study have been performed. It is believed that both orientation and positional reorganizations are responsible, depending upon the size of the central ion and side chain length.
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Affiliation(s)
- Chandana Pal
- Institute of Materials and Manufacturing, Brunel University London, Uxbridge, Middlesex UB8 3PH, UK
| | | | | | - A. K. Sharma
- United States Air Force Research Laboratory, Space Vehicles Directorate, SE Kirtland AFB, NM 87117, USA
| | - Asim K. Ray
- Institute of Materials and Manufacturing, Brunel University London, Uxbridge, Middlesex UB8 3PH, UK
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Maximino MD, Martin CS, Pereira MS, Aléssio P. Metallic Phthalocyanines: impact of the film deposition method on its supramolecular arrangement and sensor performance. AN ACAD BRAS CIENC 2019; 91:e20181201. [PMID: 31778456 DOI: 10.1590/0001-3765201920181201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 02/05/2019] [Indexed: 11/21/2022] Open
Abstract
This short review gives a concise overview of the impact of deposition methods on the supramolecular arrangement of metallic phthalocyanine films and their applications. Primarily, an introduction about the possible phthalocyanine molecular structures and derivatives obtained from modification on the phthalocyanine rings was presented. The possibility of perfecting/improving the supramolecular arrangement of metallic phthalocyanine (MPcs) films by using different deposition techniques such as Langmuir-Blodgett (LB), Langmuir-Schaefer (LS), Layer-by-Layer (LbL), physical vapor deposition (PVD) and electrodeposition was discussed in further details. Herein, we highlighted some techniques used on the characterization of supramolecular arrangement (morphology, optical properties, and molecular organization), including the impact on sensing applications. The main scope of this short review is focused on the advances made in this research field in the last five years.
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Affiliation(s)
- Mateus D Maximino
- São Paulo State University (UNESP), School of Technology and Applied Sciences, 305 Roberto Simonsen St, 19060-900 Presidente Prudente, SP, Brazil
| | - Cibely S Martin
- São Paulo State University (UNESP), School of Technology and Applied Sciences, 305 Roberto Simonsen St, 19060-900 Presidente Prudente, SP, Brazil
| | - Matheus S Pereira
- São Paulo State University (UNESP), School of Technology and Applied Sciences, 305 Roberto Simonsen St, 19060-900 Presidente Prudente, SP, Brazil
| | - Priscila Aléssio
- São Paulo State University (UNESP), School of Technology and Applied Sciences, 305 Roberto Simonsen St, 19060-900 Presidente Prudente, SP, Brazil
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9
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Electrochemical Sensors Modified with Combinations of Sulfur Containing Phthalocyanines and Capped Gold Nanoparticles: A Study of the Influence of the Nature of the Interaction between Sensing Materials. NANOMATERIALS 2019; 9:nano9111506. [PMID: 31652754 PMCID: PMC6915348 DOI: 10.3390/nano9111506] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/11/2019] [Accepted: 10/16/2019] [Indexed: 01/12/2023]
Abstract
Voltametric sensors formed by the combination of a sulfur-substituted zinc phthalocyanine (ZnPcRS) and gold nanoparticles capped with tetraoctylammonium bromide (AuNPtOcBr) have been developed. The influence of the nature of the interaction between both components in the response towards catechol has been evaluated. Electrodes modified with a mixture of nanoparticles and phthalocyanine (AuNPtOcBr/ZnPcRS) show an increase in the intensity of the peak associated with the reduction of catechol. Electrodes modified with a covalent adduct-both component are linked through a thioether bond-(AuNPtOcBr-S-ZnPcR), show an increase in the intensity of the oxidation peak. Voltammograms registered at increasing scan rates show that charge transfer coefficients are different in both types of electrodes confirming that the kinetics of the electrochemical reaction is influenced by the nature of the interaction between both electrocatalytic materials. The limits of detection attained are 0.9 × 10−6 mol∙L−1 for the electrode modified with the mixture AuNPtOcBr/ZnPcRS and 1.3 × 10−7 mol∙L−1 for the electrode modified with the covalent adduct AuNPtOcBr-S-ZnPcR. These results indicate that the establishment of covalent bonds between nanoparticles and phthalocyanines can be a good strategy to obtain sensors with enhanced performance, improving the charge transfer rate and the detection limits of voltammetric sensors.
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Ozer T, Isildak I. A New Fe (III)-Selective Membrane Electrode Based on Fe (II) Phthalocyanine. J ELECTROCHEM SCI TE 2019. [DOI: 10.33961/jecst.2019.00038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Dubinina TV, Kosov AD, Petrusevich EF, Borisova NE, Trigub AL, Mamin GV, Gilmutdinov IF, Masitov AA, Tokarev SV, Pushkarev VE, Tomilova LG. Sandwich double-decker Er(iii) and Yb(iii) complexes containing naphthalocyanine moiety: synthesis and investigation of the effect of a paramagnetic metal center. Dalton Trans 2019; 48:13413-13422. [PMID: 31433418 DOI: 10.1039/c9dt03226f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel heteroleptic Er(iii) and Yb(iii) naphthalocyaninato-phthalocyaninates containing an octa-phenyl or octa-phenoxysubstituted naphthalocyanine deck were synthesised and identified by 1H NMR, EPR and high resolution MALDI-TOF/TOF mass spectrometry. Direct synthesis of novel homoleptic Yb(iii) bis (octa-phenylnaphthalocyaninate) was carried out. Downfield lanthanide induced shifts of the aromatic protons in target compounds were observed compared with the corresponding diamagnetic Lu(iii) complexes. In the near-IR absorption spectra, an increase in ionic radius from Lu(iii) to Er(iii) resulted in a bathochromic shift of the intervalence band up to 1473 nm. This work presents the first experimental EPR study of Yb(iii) bis naphthalocyaninate, where a set of magnetic parameters and properties (including spin, magnitude and sign of magnetic anisotropy parameter D, increased splitting in a crystal field, ferromagnetic f-π interaction etc.) were determined and interpreted by both EPR and SQUID techniques and supported by theoretical considerations.
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Affiliation(s)
- Tatiana V Dubinina
- Chemistry Department, Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation. and Institute of Physiologically Active Compounds, Russian Academy of Sciences, 1 Severny proezd, 142432 Chernogolovka, Moscow Region, Russian Federation
| | - Anton D Kosov
- Chemistry Department, Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation.
| | - Elizaveta F Petrusevich
- Chemistry Department, Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation.
| | - Nataliya E Borisova
- Chemistry Department, Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation. and N. A. Nesmeyanov Institute of Organoelement Compounds, 28 Vavilov Str., 119334 Moscow, Russian Federation
| | - Alexander L Trigub
- National Research Center "Kurchatov Institute", pl. Akad. Kurchatova, dom 1, 123098 Moscow, Russian Federation
| | - George V Mamin
- Kazan Federal University, Institute of Physics, 18 Kremlyovskaya Str., 420008 Kazan, Russian Federation
| | - Ildar F Gilmutdinov
- Kazan Federal University, Institute of Physics, 18 Kremlyovskaya Str., 420008 Kazan, Russian Federation
| | - Artem A Masitov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Academician Semenov avenue, 142432 Chernogolovka, Moscow Region, Russian Federation
| | - Sergey V Tokarev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 Academician Semenov avenue, 142432 Chernogolovka, Moscow Region, Russian Federation
| | - Victor E Pushkarev
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, 1 Severny proezd, 142432 Chernogolovka, Moscow Region, Russian Federation
| | - Larisa G Tomilova
- Chemistry Department, Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation. and Institute of Physiologically Active Compounds, Russian Academy of Sciences, 1 Severny proezd, 142432 Chernogolovka, Moscow Region, Russian Federation
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Sekhosana KE, Shumba M, Nyokong T. Electrochemical Detection of 4‐Chlorophenol Using Glassy Carbon Electrodes Modified with Thulium Double‐Decker Phthalocyanine Salts. ChemistrySelect 2019. [DOI: 10.1002/slct.201803891] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kutloano Edward Sekhosana
- Center for Nanotechnology and InnovationDepartment of ChemistryRhodes University, PO Box 94 Grahamstown 6140 South Africa
| | - Munyaradzi Shumba
- Center for Nanotechnology and InnovationDepartment of ChemistryRhodes University, PO Box 94 Grahamstown 6140 South Africa
| | - Tebello Nyokong
- Center for Nanotechnology and InnovationDepartment of ChemistryRhodes University, PO Box 94 Grahamstown 6140 South Africa
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13
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Keleş T, Biyiklioglu Z, Gültekin E, Bekircan O. Synthesis and electrochemical properties of peripheral, non-peripheral tetra [2-(3,5-diphenyl-1H-1,2,4-triazol-1-yl)ethoxy] substituted cobalt(II), manganese(III) phthalocyanines. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Silva AC, Lourenço AS, de Araujo MCU. Simultaneous voltammetric determination of four organic acids in fruit juices using multiway calibration. Food Chem 2018; 266:232-239. [DOI: 10.1016/j.foodchem.2018.06.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 05/30/2018] [Accepted: 06/03/2018] [Indexed: 11/29/2022]
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15
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Sekhosana KE, Nkhahle R, Nyokong T. The Primary Demonstration of Exciton Coupling Effects on Optical Limiting Properties of Blue Double‐Decker Lanthanide Phthalocyanine Salts. ChemistrySelect 2018. [DOI: 10.1002/slct.201800597] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kutloano E. Sekhosana
- Center for Nanotechnology and InnovationDepartment of ChemistryRhodes University, PO Box 94 Grahamstown 6140 South Africa
| | - Reitumetse Nkhahle
- Center for Nanotechnology and InnovationDepartment of ChemistryRhodes University, PO Box 94 Grahamstown 6140 South Africa
| | - Tebello Nyokong
- Center for Nanotechnology and InnovationDepartment of ChemistryRhodes University, PO Box 94 Grahamstown 6140 South Africa
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16
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Lourenço AS, Nascimento RF, Silva AC, Ribeiro WF, Araujo MC, Oliveira SC, Nascimento VB. Voltammetric determination of tartaric acid in wines by electrocatalytic oxidation on a cobalt(II)-phthalocyanine-modified electrode associated with multiway calibration. Anal Chim Acta 2018; 1008:29-37. [DOI: 10.1016/j.aca.2018.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 12/28/2017] [Accepted: 01/11/2018] [Indexed: 11/15/2022]
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17
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Aytan Kiliçarslan F, Keskin B, Erden İ, Erdoğmuş A. Synthesis, characterization and electrochemical properties of new phthalocyanines. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1362501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Bahadir Keskin
- Department of Chemistry, Yildiz Technical University, Istanbul, Turkey
| | - İbrahim Erden
- Department of Chemistry, Yildiz Technical University, Istanbul, Turkey
| | - Ali Erdoğmuş
- Department of Chemistry, Yildiz Technical University, Istanbul, Turkey
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18
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Venegas R, Recio FJ, Zuñiga C, Viera M, Oyarzún MP, Silva N, Neira K, Marco JF, Zagal JH, Tasca F. Comparison of the catalytic activity for O2reduction of Fe and Co MN4 adsorbed on graphite electrodes and on carbon nanotubes. Phys Chem Chem Phys 2017; 19:20441-20450. [DOI: 10.1039/c7cp03172f] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Metal phthalocyanines adsorbed on CNTs deliver much higher electrocatalytic currents for the ORR because of the high concentration of catalyst.
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Affiliation(s)
- Ricardo Venegas
- Facultad de Química
- Departamento de Química Inorgánica
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Francisco J. Recio
- Facultad de Química
- Departamento de Química Inorgánica
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Cesar Zuñiga
- Facultad de Química
- Departamento de Química Inorgánica
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Marco Viera
- Facultad de Química y Biología
- Departamento de Química de los Materiales Universidad de Santiago de Chile
- Santiago 9170022
- Chile
- Facultad de Ciencias Naturales
| | - María-Paz Oyarzún
- Facultad de Química y Biología
- Departamento de Química de los Materiales Universidad de Santiago de Chile
- Santiago 9170022
- Chile
| | - Nataly Silva
- Facultad de Química y Biología
- Departamento de Química de los Materiales Universidad de Santiago de Chile
- Santiago 9170022
- Chile
| | - Karinna Neira
- Facultad de Química y Biología
- Departamento de Química de los Materiales Universidad de Santiago de Chile
- Santiago 9170022
- Chile
| | - José F. Marco
- Instituto de Química Física “Rocasolano”
- CSIC
- Madrid
- Spain
| | - José H. Zagal
- Facultad de Química y Biología
- Departamento de Química de los Materiales Universidad de Santiago de Chile
- Santiago 9170022
- Chile
| | - Federico Tasca
- Facultad de Química y Biología
- Departamento de Química de los Materiales Universidad de Santiago de Chile
- Santiago 9170022
- Chile
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García-Hernández C, García-Cabezón C, Martín-Pedrosa F, De Saja JA, Rodríguez-Méndez ML. Layered composites of PEDOT/PSS/nanoparticles and PEDOT/PSS/phthalocyanines as electron mediators for sensors and biosensors. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:1948-1959. [PMID: 28144543 PMCID: PMC5238661 DOI: 10.3762/bjnano.7.186] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/16/2016] [Indexed: 05/25/2023]
Abstract
The sensing properties of electrodes chemically modified with PEDOT/PSS towards catechol and hydroquinone sensing have been successfully improved by combining layers of PEDOT/PSS with layers of a secondary electrocatalytic material such as gold nanoparticles (PEDOT/PSS/AuNPs), copper phthalocyanine (PEDOT/PSS/CuPc) or lutetium bisphthalocyanine (PEDOT/PSS/LuPc2). Layered composites exhibit synergistic effects that strongly enhance the electrocatalytic activity as indicated by the increase in intensity and the shift of the redox peaks to lower potentials. A remarkable improvement has been achieved using PEDOT/PSS/LuPc2, which exhibits excellent electrocatalytic activity towards the oxidation of catechol. The kinetic studies demonstrated diffusion-controlled processes at the electrode surfaces. The kinetic parameters such as Tafel slopes and charge transfer coefficient (α) confirm the improved electrocatalytic activity of the layered electron mediators. The peak currents increased linearly with concentration of catechol and hydroquinone over the range of 1.5 × 10-4 to 4.0 × 10-6 mol·L-1 with a limit of detection on the scale of μmol·L-1. The layered composite hybrid systems were also found to be excellent electron mediators in biosensors containing tyrosinase and laccase, and they combine the recognition and biocatalytic properties of biomolecules with the unique catalytic features of composite materials. The observed increase in the intensity of the responses allowed detection limits of 1 × 10-7 mol·L-1 to be attained.
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Affiliation(s)
- Celia García-Hernández
- Grupo Uvasens, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - Cristina García-Cabezón
- Grupo Uvasens, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - Fernando Martín-Pedrosa
- Grupo Uvasens, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - José Antonio De Saja
- Grupo Uvasens, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - María Luz Rodríguez-Méndez
- Grupo Uvasens, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
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Rodriguez-Mendez ML, García-Hernandez C, Medina-Plaza C, García-Cabezón C, de Saja JA. Multisensor systems based on phthalocyanines for monitoring the quality of grapes. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616500796] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Arrays of phthalocyanine-based sensors with complementary activity have been used to develop voltammetric electronic tongues. Such systems have demonstrated to be useful in enology for the evaluation of quality of wines in different production stages, from grapes to bottles. In this paper, the state of the art of multisensor systems based on phthalocyanines dedicated to the analysis of musts (juices obtained from crushed grapes) is described. Such multisensor systems cover different types of sensors from simple Carbon Paste Electrodes, to sophiticated nanostructured sensors, including Langmuir–Blodgett or Layer by Layer thin films and biomimetic biosensors where phthalocyanines play a crucial role as electron mediator between enzymes and electrodes. In all cases, multisensor systems based on phthalocyanines have been able to discriminate musts prepared from different varieties of grapes. The performance of these systems can be improved by combining non-specific sensors with biosensors containing enzymes selective to phenols. In this case, excellent relationships have been found between the responses provided by the array and the content in phenols and acids provided by traditional chemical analysis.
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Affiliation(s)
- Maria Luz Rodriguez-Mendez
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - Celia García-Hernandez
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - Cristina Medina-Plaza
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain
| | - Cristina García-Cabezón
- Department of Materials Science, Escuela Ingenierías Industriales, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Jose Antonio de Saja
- Department of Condensed Matter Physics, Universidad de Valladolid, 47011 Valladolid, Spain
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21
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Rodríguez-Méndez ML, Medina-Plaza C, García-Hernández C, Rodríguez S, García-Cabezón C, Paniagua D, Rodríguez-Pérez MA, de Saja JA. Improvement of electrocatalytic effect in voltammetric sensors based on phthalocyanines. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616500218] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Voltammetric sensors based on phthalocyanines have been used to detect a variety of compounds. In this paper, the state of the art of sensors prepared using classical techniques will be revised. Then, new strategies to improve the performance of the sensors will be described using as example sensors chemically modified with lutetium bisphthalocyanine (LuPc[Formula: see text] dedicated to the detection of phenols of interest in the food industry. Classical LuPc2 carbon paste electrodes can detect phenols such as catechol, caffeic acid or pyrogallol with limits of detection in the range of 10[Formula: see text]–10[Formula: see text] M. The performance can be improved by using nanostructured Langmuir–Blodgett (LB) or Layer by Layer (LbL) films. The enhanced surface to volume ratio produce an increase in the sensitivity of the sensors. Limits of detection of 10[Formula: see text]–10[Formula: see text] M are attained, which are one order of magnitude lower than those obtained using conventional carbon paste electrodes. Moreover, these techniques can be used to co-immobilize two electrocatalytic materials in the same device. The limits of detection obtained in LB sensors combining LuPc2/AuNPs or LuPc2/CNT are further improved. Finally, the LB technique has been used to prepare biosensors where a phenol oxydase (such as tyrosinase or lacasse) is immobilized in a biomimetic environment that preserves the enzymatic activity. Moreover, LuPc2 can be co-immobilized with the enzyme in a lipidic film formed by arachidic acid (AA). LuPc2 can act as an electron mediator facilitating the electron transfer. These biomimetic sensors formed by LuPc2/AA/enzyme show Limits of detection of 10[Formula: see text] M and an enhanced selectivity.
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Affiliation(s)
- María L. Rodríguez-Méndez
- Department of Inorganic Chemistry, Industrial Engineers School, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Cristina Medina-Plaza
- Department of Inorganic Chemistry, Industrial Engineers School, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Celia García-Hernández
- Department of Inorganic Chemistry, Industrial Engineers School, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Silvia Rodríguez
- Department of Inorganic Chemistry, Industrial Engineers School, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Cristina García-Cabezón
- Department of Materials Science, Industrial Engineers School, Universidad de Valladolid, 47011 Valladolid, Spain
| | - David Paniagua
- Department of Inorganic Chemistry, Industrial Engineers School, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Miguel A. Rodríguez-Pérez
- Department of Condensed Matter Physics, Faculty of Sciences, Universidad de Valladolid, 47011 Valladolid, Spain
| | - José A. de Saja
- Department of Condensed Matter Physics, Faculty of Sciences, Universidad de Valladolid, 47011 Valladolid, Spain
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22
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Tarakanova EN, Trashin SA, Simakov AO, Furuyama T, Dzuban AV, Inasaridze LN, Tarakanov PA, Troshin PA, Pushkarev VE, Kobayashi N, Tomilova LG. Double-decker bis(tetradiazepinoporphyrazinato) rare earth complexes: crucial role of intramolecular hydrogen bonding. Dalton Trans 2016; 45:12041-52. [DOI: 10.1039/c6dt01779g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Study focuses on specific interactions in diazepine-containing macroheterocycles.
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23
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Garcia-Hernandez C, Medina-Plaza C, Garcia-Cabezon C, Martin-Pedrosa F, del Valle I, Antonio de Saja J, Rodríguez-Méndez ML. An Electrochemical Quartz Crystal Microbalance Multisensor System Based on Phthalocyanine Nanostructured Films: Discrimination of Musts. SENSORS (BASEL, SWITZERLAND) 2015; 15:29233-49. [PMID: 26610494 PMCID: PMC4701330 DOI: 10.3390/s151129233] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/09/2015] [Accepted: 11/13/2015] [Indexed: 12/30/2022]
Abstract
An array of electrochemical quartz crystal electrodes (EQCM) modified with nanostructured films based on phthalocyanines was developed and used to discriminate musts prepared from different varieties of grapes. Nanostructured films of iron, nickel and copper phthalocyanines were deposited on Pt/quartz crystals through the Layer by Layer technique by alternating layers of the corresponding phthalocyanine and poly-allylamine hydrochloride. Simultaneous electrochemical and mass measurements were used to study the mass changes accompanying the oxidation of electroactive species present in must samples obtained from six Spanish varieties of grapes (Juan García, Prieto Picudo, Mencía Regadío, Cabernet Sauvignon, Garnacha and Tempranillo). The mass and voltammetric outputs were processed using three-way models. Parallel Factor Analysis (PARAFAC) was successfully used to discriminate the must samples according to their variety. Multi-way partial least squares (N-PLS) evidenced the correlations existing between the voltammetric data and the polyphenolic content measured by chemical methods. Similarly, N-PLS showed a correlation between mass outputs and parameters related to the sugar content. These results demonstrated that electronic tongues based on arrays of EQCM sensors can offer advantages over arrays of mass or voltammetric sensors used separately.
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Affiliation(s)
- Celia Garcia-Hernandez
- Department of Inorganic Chemistry, Engineers School, University of Valladolid, Valladolid 47011, Spain.
| | - Cristina Medina-Plaza
- Department of Inorganic Chemistry, Engineers School, University of Valladolid, Valladolid 47011, Spain.
| | - Cristina Garcia-Cabezon
- Department of Materials Science, Engineers School, University of Valladolid, Valladolid 47011, Spain.
| | - Fernando Martin-Pedrosa
- Department of Materials Science, Engineers School, University of Valladolid, Valladolid 47011, Spain.
| | - Isabel del Valle
- Department of Electronic Technology, Engineers School, University of Valladolid, Valladolid 47011, Spain.
| | - Jose Antonio de Saja
- Department of Condensed Matter Physics, Faculty of Sciences, University of Valladolid, Valladolid 47011, Spain.
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24
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Tarakanova EN, Levitskiy OA, Magdesieva TV, Tarakanov PA, Pushkarev VE, Tomilova LG. Cerium bis(tetradiazepinoporphyrazinate): synthesis and peculiarities of spectral and electrochemical behavior. NEW J CHEM 2015. [DOI: 10.1039/c5nj00884k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A cerium sandwich double-decker complex of tetradiazepinoporphyrazine was synthesized for the first time, which exhibited specific spectral and electrochemical properties.
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Affiliation(s)
- Ekaterina N. Tarakanova
- Institute of Physiologically Active Compounds
- Russian Academy of Sciences
- 142432 Chernogolovka
- Russian Federation
| | - Oleg A. Levitskiy
- Department of Chemistry
- M.V. Lomonosov Moscow State University
- 119991 Moscow
- Russian Federation
| | - Tatiana V. Magdesieva
- Department of Chemistry
- M.V. Lomonosov Moscow State University
- 119991 Moscow
- Russian Federation
| | - Pavel A. Tarakanov
- Institute of Physiologically Active Compounds
- Russian Academy of Sciences
- 142432 Chernogolovka
- Russian Federation
| | - Victor E. Pushkarev
- Institute of Physiologically Active Compounds
- Russian Academy of Sciences
- 142432 Chernogolovka
- Russian Federation
| | - Larisa G. Tomilova
- Institute of Physiologically Active Compounds
- Russian Academy of Sciences
- 142432 Chernogolovka
- Russian Federation
- Department of Chemistry
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25
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Medina-Plaza C, Furini LN, Constantino CJL, de Saja JA, Rodri Guez-Mendez ML. Synergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyanines. Anal Chim Acta 2014; 851:95-102. [PMID: 25440670 DOI: 10.1016/j.aca.2014.08.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/28/2014] [Accepted: 08/25/2014] [Indexed: 10/24/2022]
Abstract
A synergistic electrocatalytic effect was observed in sensors where two electrocatalytic materials (functionalized gold nanoparticles and lutetium bisphthalocyanine) were co-deposited using the Langmuir-Blodgett technique. Films were prepared using a novel method where water soluble functionalised gold nanoparticles [(11-mercaptoundecyl)tetra(ethylene glycol)] (SAuNPs) were inserted in floating films of lutetium bisphthalocyanine (LuPc2) and dimethyldioctadecylammonium bromide (DODAB) as the amphiphilic matrix. The formation of stable and homogeneous mixed films was confirmed by π-A isotherms, BAM, UV-vis and Raman spectroscopy, as well as by SEM and TEM microscopy. The synergistic effect towards hydroquinone of the electrodes modified with LuPc2:DODAB/SAuNP was characterised by an increase in the intensity of the redox peaks and a reduction of the overpotential. This synergistic electrocatalytic effect arose from the interaction between the SAuNPs and the phthalocyanines that occur in the Langmuir-Blodgett films and from the high surface area provided by the nanostructured films. The sensitivity increased with the amount of LuPc2 and SAuNPs inserted in the films and limits of detection in the range of 10(-7)molL(-1) were attained.
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Affiliation(s)
- C Medina-Plaza
- Universidad de Valladolid, Department of Inorganic Chemistry, Engineers School, Spain
| | - L N Furini
- Universidad de Valladolid, Department of Inorganic Chemistry, Engineers School, Spain; Faculdade de Ciências e Tecnologia, UNESP Univ Estadual Paulista, 19060-900 Presidente Prudente, SP, Brazil
| | - C J L Constantino
- Faculdade de Ciências e Tecnologia, UNESP Univ Estadual Paulista, 19060-900 Presidente Prudente, SP, Brazil
| | - J A de Saja
- Universidad de Valladolid, Department of Condensed Matter Physics, Faculty of Sciences, Spain
| | - M L Rodri Guez-Mendez
- Universidad de Valladolid, Department of Inorganic Chemistry, Engineers School, Spain.
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26
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Medina-Plaza C, Revilla G, Muñoz R, Fernández-Escudero JA, Barajas E, Medrano G, de Saja JA, Rodriguez-Mendez ML. Electronic tongue formed by sensors and biosensors containing phthalocyanines as electron mediators: Application to the analysis of red grapes. J PORPHYR PHTHALOCYA 2014. [DOI: 10.1142/s1088424613501137] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An electronic tongue formed by voltammetric sensors and biosensors containing phthalocyanines has been developed and used to analyze grapes of different varieties. The sensors are prepared using the carbon paste technique and have been chemically modified with different metallophthalocyanines. In turn, biosensors consist of carbon paste electrodes modified with phthalocyanines combined with tyrosinase or glucose oxidase. The response of the individual sensors towards model solutions of glucose and catechol have demonstrated that the voltammetric responses depend on the nature of the phthalocyanine, evidencing the important role of the electron mediator in the performance of the sensors. The capability of the system to discriminate grapes according to their sugar and their polyphenolic content has been evidenced using Principal Component Analysis. It has been demonstrated that the proposed array of sensors combines the advantages of classical phthalocyanine based sensors — that provide global information about the sample —, with the specificity of the enzyme substrate reaction typical of biosensors. For this reason, the selectivity of the multisensor system and its capability of discrimination is clearly improved when biosensors containing glucose oxidase or tyrosinase are included in the array.
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Affiliation(s)
- Cristina Medina-Plaza
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce, 59, 47011 Valladolid, Spain
| | - Gema Revilla
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce, 59, 47011 Valladolid, Spain
| | - Raquel Muñoz
- Departamento de Bioquímica y Biología Molecular, Universidad de Valladolid, Spain
| | | | - Enrique Barajas
- ITACYL Avenida de Burgos, KM.118 Finca Zamadueñas, 47071 Valladolid, Spain
| | - Germán Medrano
- R&D Dept. Bodega Cooperativa de Cigales, C/Las Bodegas s/n, 47270 Cigales, Valladolid, Spain
| | - José Antonio de Saja
- Department of Condensed Matter Physics, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Maria Luz Rodriguez-Mendez
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, Universidad de Valladolid, Paseo del Cauce, 59, 47011 Valladolid, Spain
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27
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Ayhan MM, Zorlu Y, Gökdemir Ö, Gürek AG, Dumoulin F, Ahsen V, Hirel C. Optimized synthesis and crystal growth by sublimation of 1,3,3-trichloroisoindolenines, key building blocks for crosswise phthalocyanines. CrystEngComm 2014. [DOI: 10.1039/c4ce00189c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pal C, Sharma AK, Cammidge AN, Cook MJ, Ray AK. Octaoctyl-substituted lutetium bisphthalocyanine for NADH biosensing. J Phys Chem B 2013; 117:15033-40. [PMID: 24205933 DOI: 10.1021/jp4078568] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cyclic voltammetric and Raman and UV-vis spectroscopic measurements were performed on thin films of nonperipherally substituted bis[1,4,8,11,15,18,22,25-octakis(octyl)phthalocyaninato] lutetium(III) (R16LuPc2). Voltammograms exhibit one-electron quasi-reversible redox processes in 1.5 M LiClO4 aqueous solutions. The red-shift of the Q-band of R16LuPc2 in the UV-visible absorption spectra upon oxidation is attributed to the shortening of the inter-ring distance between the two phthalocyanine moieties. This observation is also consistent with the shift in the redox-sensitive vibrational modes in the Raman spectra due to the localization of the positive charge on phthalocyanine moieties. Neutralization of the oxidized R16LuPc2(+) film by dihydronicotinamide adenine dinucleotide (NADH) using different concentrations varying from 0.05 to 1 mM has been studied by UV-vis absorption and Raman spectroscopies. The reduction processes for a three month old film were found to be slower than those for freshly prepared films and showed a dependence upon NADH concentration. The data provide a basis for application of R16LuPc2 as a sensor for NADH.
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Affiliation(s)
- C Pal
- The Wolfson Centre for Materials Processing, Brunel University , Uxbridge, Middlesex UB8 3PH, U.K
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Apetrei C, Medina-Plaza C, de Saja JA, Rodriguez-Mendez ML. Electrochemical characterization of dilithium phthalocyanine carbonaceous electrodes. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613500430] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Carbonaceous electrodes of dilithium phthalocyanine were prepared using graphite, carbon microspheres and multiwall carbon nanotubes. The electrochemical behavior of the dilithium bisphthalocyanine electrodes was found to be dependent on the nature of the carbonaceous material and on the nature of the electrolytic solution. The electrocatalytic properties of the dilithium phthalocyanine electrodes for oxidation of ascorbic acid were evidenced by the enhancement of the oxidation peak current, (~10 fold compared to the bare carbon electrodes) and the decrease of the oxidation potential at which oxidation of ascorbic acid takes place. The combined use of multiwall carbon nanotubes and dilithium phthalocyanine produces a synergistic effect that improves the electrocatalytic effect towards ascorbic acid.
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Affiliation(s)
- Constantin Apetrei
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, University of Valladolid, Paseo del Cauce, 59, 47011 Valladolid, Spain
- Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, "Dunarea de Jos", University of Galati, 47 Domneasca Street, 800008 Galati, Romania
| | - Cristina Medina-Plaza
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, University of Valladolid, Paseo del Cauce, 59, 47011 Valladolid, Spain
| | - José Antonio de Saja
- Department of Condensed Matter Physics, Faculty of Sciences, University of Valladolid, 47011 Valladolid, Spain
| | - Maria Luz Rodriguez-Mendez
- Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, University of Valladolid, Paseo del Cauce, 59, 47011 Valladolid, Spain
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30
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Information visualization to enhance sensitivity and selectivity in biosensing. Biointerphases 2012; 7:53. [PMID: 22911268 DOI: 10.1007/s13758-012-0053-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 08/06/2012] [Indexed: 10/28/2022] Open
Abstract
An overview is provided of the various methods for analyzing biosensing data, with emphasis on information visualization approaches such as multidimensional projection techniques. Emphasis is placed on the importance of data analysis methods, with a description of traditional techniques, including the advantages and limitations of linear and non-linear methods to generate layouts that emphasize similarity/dissimilarity relationships among data instances. Particularly important are recent methods that allow processing high-dimensional data, thus taking full advantage of the capabilities of modern equipment. In this area, now referred to as e-science, the choice of appropriate data analysis methods is crucial to enhance the sensitivity and selectivity of sensors and biosensors. Two types of systems deserving attention in this context are electronic noses and electronic tongues, which are made of sensor arrays whose electrical or electrochemical responses are combined to provide "finger print" information for aromas and tastes. Examples will also be given of unprecedented detection of tropical diseases, made possible with the use of multidimensional projection techniques. Furthermore, ways of using these techniques along with other information visualization methods to optimize biosensors will be discussed.
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Ghasemi-Varnamkhasti M, Rodríguez-Méndez ML, Mohtasebi SS, Apetrei C, Lozano J, Ahmadi H, Razavi SH, Antonio de Saja J. Monitoring the aging of beers using a bioelectronic tongue. Food Control 2012. [DOI: 10.1016/j.foodcont.2011.10.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Pal C, Cammidge AN, Cook MJ, Sosa-Sanchez JL, Sharma AK, Ray AK. In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors. J R Soc Interface 2011; 9:183-9. [PMID: 21676969 DOI: 10.1098/rsif.2010.0726] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Spin-coated films, approximately 100 nm thick, of a newly synthesized bis[octakis(octyl)phthalocyaninato] lutetium(III) complex on ultrasonically cleaned glass substrates exhibit pronounced chemichromic behaviour with potential application in healthcare. In situ kinetic optical absorption spectroscopic measurements show that the phthalocyanine Q-band is red shifted by 60 nm upon oxidation arising from exposure to bromine vapour. Recovery to the original state is achieved by the treatment of the oxidized films with nicotinamide adenine dinucleotide and l-ascorbic acid (vitamin C) in an aqueous solution containing 1.5 M lithium perchlorate. The neutralization process is found to be governed by first-order kinetics. The linear increase of the reduction rate with increasing concentration of cofactors provides a basis for calibration of analyte concentrations ranging from 3.5 mM down to 0.03 mM.
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Affiliation(s)
- C Pal
- The Wolfson Centre for Materials Processing, Brunel University, Uxbridge, Middlesex UB8 3PH, UK
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34
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Ghasemi-Varnamkhasti M, Mohtasebi S, Rodríguez-Méndez M, Siadat M, Ahmadi H, Razavi S. Electronic and bioelectronic tongues, two promising analytical tools for the quality evaluation of non alcoholic beer. Trends Food Sci Technol 2011. [DOI: 10.1016/j.tifs.2011.01.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Pavinatto FJ, Fernandes EGR, Alessio P, Constantino CJL, de Saja JA, Zucolotto V, Apetrei C, Oliveira Jr ON, Rodriguez-Mendez ML. Optimized architecture for Tyrosinase-containing Langmuir–Blodgett films to detect pyrogallol. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03864d] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Ghasemi-Varnamkhasti M, Mohtasebi SS, Siadat M. Biomimetic-based odor and taste sensing systems to food quality and safety characterization: An overview on basic principles and recent achievements. J FOOD ENG 2010. [DOI: 10.1016/j.jfoodeng.2010.04.032] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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