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Sindelo A, Britton J, Lanterna AE, Scaiano JC, Nyokong T. Decoration of glass wool with zinc (II) phthalocyanine for the photocatalytic transformation of methyl orange. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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2
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Sindelo A, Mafukidze DM, Nyokong T. Fabrication of asymmetrical morpholine phthalocyanines conjugated chitosan-polyacrylonitrile nanofibers for improved photodynamic antimicrobial chemotherapy activity. Photodiagnosis Photodyn Ther 2022; 38:102760. [DOI: 10.1016/j.pdpdt.2022.102760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/24/2022] [Accepted: 02/14/2022] [Indexed: 12/24/2022]
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3
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Singh N, Riaz U. Recent trends on synthetic approaches and application studies of conducting polymers and copolymers: a review. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03987-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4
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Novel photosensitizing nanoparticles for PDT and biosensing applications. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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5
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Vallejo W, Navarro K, Díaz-Uribe C, Schott E, Zarate X, Romero E. Zn(II)-tetracarboxy-phthalocyanine-Sensitized TiO 2 Thin Films as Antimicrobial Agents under Visible Irradiation: a Combined DFT and Experimental Study. ACS OMEGA 2021; 6:13637-13646. [PMID: 34095657 PMCID: PMC8173549 DOI: 10.1021/acsomega.1c00658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/10/2021] [Indexed: 06/02/2023]
Abstract
In this article, we studied the antimicrobial activity of TiO2 sensitized by the Zn(II)-tetracarboxy-phthalocyanine (TcPcZn) complex using TiO2-Degussa P25 as a semiconductor source. The TiO2 thin films were deposited by the doctor blade method and were sensitized by the chemisorption process. The obtained compounds were characterized using Fourier transform infrared spectroscopy, UV-vis spectrophotometry, Raman spectroscopy, diffuse reflectance spectroscopy, and scanning electron microscopy. Furthermore, we studied the stability of the adsorbed sensitizer on the semiconductor surface by using the density functional theory (DFT). Additionally, we determined the antimicrobial activity of TcPcZn-TiO2 against methicillin-resistant Staphylococcus aureus (MRSA). The Raman and optical results confirmed the sensitizing process. The TcPcZn-TiO2 thin films showed radiation absorption in the visible range of the electromagnetic spectrum (600-750 nm), and the dye anchored on the TiO2 surface had a band gap of 1.58 eV. The DFT study showed that TcPcZn supported on any phase of Degussa P25 is stable, making them suitable to act as catalysts in the proposed reactions. Finally, the TcPcZn-TiO2 thin films reached 76.5% of inhibition activity against MRSA.
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Affiliation(s)
- William Vallejo
- Grupo
de Investigación en Fotoquímica y Fotobiología,
Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia 081007, Colombia
| | - Karen Navarro
- Grupo
de Investigación en Fotoquímica y Fotobiología,
Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia 081007, Colombia
| | - Carlos Díaz-Uribe
- Grupo
de Investigación en Fotoquímica y Fotobiología,
Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia 081007, Colombia
| | - Eduardo Schott
- Departamento
de Química Inorgánica, Facultad de Química y
de Farmacia, Centro de Energía UC, Centro de Investigación
en Nanotecnología y Materiales Avanzados CIEN-UC, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna, 4860 Santiago, Chile
- Millenium
Nuclei on Catalytic Processes Towards Sustainable Chemistry (CSC), Concepcion 4030000, Chile
| | - Ximena Zarate
- Instituto
de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Avenida Pedro de Valdivia 425, Santiago 7500912, Chile
| | - Eduard Romero
- Departamento
de Química, Universidad Nacional
de Colombia, Bogotá 111321, Colombia
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6
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Fabrication and characterization of polyethersulfone membranes functionalized with zinc phthalocyanines embedding different substitute groups. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126288] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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7
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Mafukidze DM, Nyokong T. Photocatalytic and solar radiation harvesting potential of a free-base porphyrin-zinc (II) phthalocyanine heterodyad functionalized polystyrene polymer membrane for the degradation of 4-chlorophenol. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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8
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Mafukidze DM, Nyokong T. Photodynamic antimicrobial chemotherapy of a dimethylamino-functionalized asymmetric zinc(II) phthalocyanine and its quaternized derivative against Staphylococcus aureus when supported on asymmetric polystyrene polymer membranes. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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9
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Fabrication of Hybrid Membranes Containing Nylon-11 and Organic Semiconductor Particles with Potential Applications in Molecular Electronics. Polymers (Basel) 2019; 12:polym12010009. [PMID: 31861628 PMCID: PMC7023623 DOI: 10.3390/polym12010009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/09/2019] [Accepted: 12/11/2019] [Indexed: 02/05/2023] Open
Abstract
Chemical degradation is a major disadvantage in the development of organic semiconductors. This work proposes the manufacture and characterization of organic semiconductor membranes in order to prevent semiconductor properties decreasing. Semiconductor membranes consisting of Nylon-11 and particles of π-conjugated molecular semiconductors were manufactured by high-vacuum evaporation followed by thermal relaxation. Initially, and with the aim of obtaining semiconductor particles, bulk heterojunction (BHJ) was carried out using green chemistry techniques between the zinc phthalocyanine (ZnPc) and the zinc hexadecafluoro-phthalocyanine (F16ZnPc) as n-type molecular semiconductors with the p-type molecular semiconductor dibenzotetrathiafulvalene (DBTTF). Consequently, the π-conjugated semiconductors particles were embedded in a Nylon-11 matrix and characterized, both structurally and considering their optical and electrical properties. Thin films of these materials were manufactured in order to comparatively study the membranes and precursor semiconductor particles. The membranes presented bandgap (Eg) values that were lower than those obtained in the films, which is an indicator of an improvement in their semiconductor capacity. Finally, the membranes were subjected to accelerated lighting conditions, to determine the stability of the polymer and the operating capacity of the membrane. After fatigue conditions, the electrical behavior of the proposed semiconductor membranes remained practically unaltered; therefore, they could have potential applications in molecular electronics. The chemical stability of membranes, which did not degrade in their polymer compound, nor in the semiconductor, was monitored by IR spectroscopy.
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Mafukidze DM, Sindelo A, Nyokong T. Spectroscopic characterization and photodynamic antimicrobial chemotherapy of phthalocyanine-silver triangular nanoprism conjugates when supported on asymmetric polymer membranes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:333-345. [PMID: 31055240 DOI: 10.1016/j.saa.2019.04.054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 04/18/2019] [Accepted: 04/19/2019] [Indexed: 06/09/2023]
Abstract
Silver triangular nanoprisms were synthesized and conjugated to zinc (ZnPc) and indium (InPc) phthalocyanines prior to embedding in asymmetric membranes. Conjugation of nanoparticles increased triplet state and singlet oxygen quantum yields of the phthalocyanines as well as enhancing photodynamic antimicrobial chemotherapy (PACT) activity against bacteria (S. aureus). The ZnPc derivative showed higher PACT activity when compared to the InPc, possibly due to degradation of the latter in aqueous media.
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Affiliation(s)
- Donovan M Mafukidze
- Institute of Nanotechnology Innovation, Department of Chemistry, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
| | - Azole Sindelo
- Institute of Nanotechnology Innovation, Department of Chemistry, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
| | - Tebello Nyokong
- Institute of Nanotechnology Innovation, Department of Chemistry, Rhodes University, PO Box 94, Grahamstown 6140, South Africa.
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11
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Sánchez-Vergara ME, Hamui L, González Habib S. New Approaches in Flexible Organic Field-Effect Transistors (FETs) Using InClPc. MATERIALS 2019; 12:ma12101712. [PMID: 31137789 PMCID: PMC6566502 DOI: 10.3390/ma12101712] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/04/2019] [Accepted: 05/15/2019] [Indexed: 11/16/2022]
Abstract
Organic semiconductor materials have been the center of attention because they are scalable, low-cost for device fabrication, and they have good optical properties and mechanical flexibility, which encourages their research. Organic field-effect transistors (OFETs) have potential applications, specifically in flexible and low-cost electronics such as portable and wearable technologies. In this work we report the fabrication of an InClPc base flexible bottom-gate/top-contact OFET sandwich, configured by the high-evaporation vacuum technique. The gate substrate consisted of a bilayer poly(ethylene terephthalate) (PET) and indium–tin oxide (ITO) with nylon 11/Al2O3. The device was characterized by different techniques to determine chemical stability, absorbance, transmittance, bandgap, optical properties, and electrical characteristics in order to determine its structure and operational properties. IR spectroscopy verified that the thin films that integrated the device did not suffer degradation during the deposition process, and there were no impurities that affected the charge mobility in the OFET. Also, the InClPc semiconductor IR fingerprint was present on the deposited device. Surface analysis showed evidence of a nonhomogeneous film and also a cluster deposition process of the InClPc. Using the Tauc model, the device calculated indirect bandgap transitions of approximately 1.67 eV. The device’s field effect mobility had a value of 36.2 cm2 V−1 s−1, which was superior to mobility values obtained for commonly manufactured OFETs and increased its potential to be used in flexible organic electronics. Also, a subthreshold swing of 80.64 mV/dec was achieved and was adequate for this kind of organic-based semiconductor device. Therefore, semiconductor functionality is maintained at different gate voltages and is transferred accurately to the film, which makes these flexible OFETs a good candidate for electronic applications.
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Affiliation(s)
- María Elena Sánchez-Vergara
- Facultad de Ingeniería, Universidad Anáhuac México, Ave. Universidad Anáhuac 46, Col. Lomas Anáhuac, Huixquilucan P.C. 52786, Mexico.
| | - Leon Hamui
- Facultad de Ingeniería, Universidad Anáhuac México, Ave. Universidad Anáhuac 46, Col. Lomas Anáhuac, Huixquilucan P.C. 52786, Mexico.
| | - Sergio González Habib
- Facultad de Ingeniería, Universidad Anáhuac México, Ave. Universidad Anáhuac 46, Col. Lomas Anáhuac, Huixquilucan P.C. 52786, Mexico.
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A comparative study of the singlet oxygen generation capability of a zinc phthalocyanine linked to graphene quantum dots through π-π stacking and covalent conjugation when embedded in asymmetric polymer membranes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.096] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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New Development of Membrane Base Optoelectronic Devices. Polymers (Basel) 2017; 10:polym10010016. [PMID: 30966051 PMCID: PMC6415192 DOI: 10.3390/polym10010016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/19/2017] [Accepted: 12/21/2017] [Indexed: 11/30/2022] Open
Abstract
It is known that one factor that affects the operation of optoelectronic devices is the effective protection of the semiconductor materials against environmental conditions. The permeation of atmospheric oxygen and water molecules into the device structure induces degradation of the electrodes and the semiconductor. As a result, in this communication we report the fabrication of semiconductor membranes consisting of Magnesium Phthalocyanine-allene (MgPc-allene) particles dispersed in Nylon 11 films. These membranes combine polymer properties with organic semiconductors properties and also provide a barrier effect for the atmospheric gas molecules. They were prepared by high vacuum evaporation and followed by thermal relaxation technique. For the characterization of the obtained membranes, Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were used to determine the chemical and microstructural properties. UV-ViS, null ellipsometry, and visible photoluminescence (PL) at room temperature were used to characterize the optoelectronic properties. These results were compared with those obtained for the organic semiconductors: MgPc-allene thin films. Additionally, semiconductor membranes devices have been prepared, and a study of the device electronic transport properties was conducted by measuring electrical current density-voltage (J-V) characteristics by four point probes with different wavelengths. The resistance properties against different environmental molecules are enhanced, maintaining their semiconductor functionality that makes them candidates for optoelectronic applications.
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Mafukidze DM, Nyokong T. Graphene quantum dot-phthalocyanine polystyrene conjugate embedded in asymmetric polymer membranes for photocatalytic oxidation of 4-chlorophenol. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1400664] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Tebello Nyokong
- Department of Chemistry, Rhodes University, Grahamstown, South Africa
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15
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Chen C, Ma Z, Zhou S, Li T, Sun X. Cobalt-Tetracarboxyl-Phthalocyanine Linked with Fe3o4/Chitosan Microsphereas—Efficient Catalyst for Dye Degradation. Catal Letters 2017. [DOI: 10.1007/s10562-017-2149-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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