Article
Chemistry, Physical
Akshay Bhujbal, K. A. Venkatesan, Bhalchandra M. Bhanage
Summary: A new protic ionic liquid [HmPip][OTf] was successfully synthesized and used for aluminum electrodeposition, resulting in bright aluminum deposits. The findings indicate the potential application of this new liquid in the field of aluminum electrodeposition.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Peng Chen, Janine Richter, Gang Wang, Dongqi Li, Tobias Pietsch, Michael Ruck
Summary: Ionometallurgy is a new development that involves the sustainable low-temperature conversion of metal ores and minerals to metals or valuable chemicals using ionic liquids or deep eutectic solvents. The IL betainium bis((trifluoromethyl)sulfonyl)imide, [Hbet][NTf2], has proven to be effective for the potentiostatic electrodeposition of zinc and lead from high concentrations of ZnO and PbO solutions. Additionally, the IL demonstrates stability while dissolving ZnO, PbO, and MgO for the deposition of metallic Zn and Pb under potentiostatic control.
Article
Chemistry, Physical
Patricia Regina Ebani, Luiza Stefanello, Bruna Luiza Kuhn, Clarissa Piccinin Frizzo, Thiago Augusto Lima Burgo, Carmen Luisa Kloster, Marcos Antonio Villetti
Summary: New nanocarriers based on carboxymethyl chitosan (CMC) and ionic liquid imidazolium-based (IL) have been developed for third-generation photosensitizers in photodynamic therapy (PDT). These nanoparticles exhibit excellent physicochemical properties, drug release profiles, and potential for application in PDT.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Ying Du, Guangyu Chu, Rui Yu, Rui Cui, Yuling Wang, Yiyong Mai, Ming Guan, Fugui Xu, Yongfeng Zhou
Summary: A polymeric micelle based on Zinc phthalocyanine (ZnPc-PA) was developed, which possessed dual-modal PTT/PDT functions and showed high efficiency in non-antibiotic bacteria eradication. In vitro experiments demonstrated excellent bacterial killing efficiency against MRSA and its biofilm, and in vivo experiments proved its potential for implant-associated infection (IAI) treatment.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hongwei You, Peixia Yang, Xuejiang Wang, Xiangkui Yang, Yunfei Sun, Maozhong An
Summary: Nanocrystalline Ni-Mo alloy coatings with excellent brightness, high hardness, and corrosion resistance were successfully prepared through electrodeposition. The electrodeposition behavior of Ni-Mo alloy coatings was studied, revealing that the nucleation rate can be accelerated by increasing the current density. XRD and TEM analysis showed that the grain size decreased and dif-fraction peaks gradually disappeared with the increase of Mo content in the alloy coating. The microhardness of the alloy coating was influenced by solid solution strengthening, texture evolution, and plastic deformation. The corrosion resistance of the Ni-Mo alloy coating was found to be better than that of pure Ni coating, with the optimal corrosion resistance achieved at a Mo content of about 15 at%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Aimin Liu, Mengxia Guo, Yubao Liu, Fengguo Liu, Xianwei Hu, Zhongning Shi
Summary: In this study, a Zn-Ta coating was electrodeposited from an ionic liquid, and its properties were investigated through electrochemical experiments and characterization techniques. The results showed that a compositionally rich Zn-Ta coating could be obtained by electrodeposition under specific potential and temperature conditions, and it exhibited a certain corrosion current density.
Article
Biophysics
Roman A. Barmin, Elizaveta A. Maksimova, Polina G. Rudakovskaya, Alexey Gayer, Evgeny A. Shirshin, Kirill S. Petrov, Daria A. Terentyeva, Olga Gusliakova, Olga A. Sindeeva, Oleg A. Klimenko, Roman N. Chuprov-Netochin, Alexander A. Solovev, Gaoshan Huang, Anastasia Ryabova, Victor B. Loschenov, Dmitry A. Gorin
Summary: Gas-liquid interfaces have gained interest in biomedicine, particularly in the use of microbubbles as theranostic platforms. In this study, two commercially available photosensitizers were conjugated to bovine serum albumin before microbubble synthesis to enhance photodynamic therapy. The conjugates increased microbubble concentration and stability compared to plain microbubbles. Agents based on one of the photosensitizers demonstrated higher photodynamic activity and microbubbles showed acoustic stability in human blood plasma. The study concludes that these microbubble platforms have potential for further applications in photodynamic therapy.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Multidisciplinary Sciences
Yu-Jyun Kao, Yu-Ju Li, Yu-An Shen, Chih-Ming Chen
Summary: In this study, the mechanical properties of Cu foils fabricated through electroplating with various SPS concentrations were examined using tensile tests. The SPS concentration affected the grain size of the Cu foils, resulting in different mechanical properties. A significant Hall-Petch effect was demonstrated, indicating the influence of grain size on the mechanical properties of the electroplated Cu foils.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Ben Niu, Zhengang Li, Die Luo, Xinyu Ma, Qingshan Yang, Yu-E Liu, Xiaoyu Yu, Xianru He, Yu Qiao, Xin Wang
Summary: The use of a polymer additive with hydrophilic and hydrophobic units can create a localized hydrophilic environment and hydrophobic layer, suppressing water-related side reactions and direct corrosion of the metal, thereby improving the electrochemical stability of aqueous Zn-ion devices.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Qijun Xia, Pengwei Ren, Huimin Meng
Summary: This paper introduces a novel method for preparing coatings with different microstructures (nano-crystalline, amorphous-nanocrystalline composite, and amorphous) in the same material system and finds that the amorphous-nanocrystalline Ni-P alloy has higher hardness and better wear resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Kun Hee Lee, Wonhyo Kong, Myeongjin Han, Da Jung Park, Jee Hyuk Ahn, Seung Zeon Han, Young-Bae Park, Kyu Hwan Lee, Seunghoe Choe
Summary: Nanocrystalline CuAg foils were fabricated with high strength, electrical conductivity, and moderate ductility. Mild annealing further improved the strength and conductivity of the foils to achieve properties comparable to those of deformed CuAg of greater thicknesses. However, annealing at higher temperatures resulted in decreased strength and increased conductivity of the foils due to grain boundary segregation and precipitation of Ag atoms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Jun Ohta, Takeshi Ohgai
Summary: Using the potentiostatic electrodeposition technique, zinc telluride nanocrystalline thin films and an array of nanowires were successfully synthesized in a citric acid bath. After annealing, the zinc telluride films exhibited a crystalline phase with a reddish-brown tint and demonstrated optical absorption performance in a wavelength region shorter than 559 nm.
APPLIED SCIENCES-BASEL
(2021)
Article
Computer Science, Interdisciplinary Applications
Zhaozheng Meng, Qing-feng Liu, Jin Xia, Yuxin Cai, Xingji Zhu, Yu Zhou, Leo Pel
Summary: This paper presents an innovative methodology for modeling the mechanical, transport, and chemical process during electrochemical treatment for marine concrete structures. The interconnected influencing factors in practical engineering can be quantitatively investigated by combining three sub-models. The calculation results show that the influence of current density on crack closure rates is more significant and highlight other previously unreported factors on electrochemical repair.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Chemistry, Physical
Michel J. R. Hache, Jason Tam, Uwe Erb, Yu Zou
Summary: High-entropy alloy (HEA) design is a promising approach to stabilize nanocrystalline materials with high strength and hardness. This study investigates the synthesis and characterization of electrodeposited HEAs from aqueous electrolytes, providing insights for developing new high-strength, thermally stable, and scalable nanostructured materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
R. Saidi, K. Raeissi, F. Ashrafizadeh, M. Kharaziha
Summary: The study aimed to improve the corrosion resistance of Ti6Al4V using electrodeposited zinc oxide coatings. By controlling the process parameters, zinc oxide coatings with various morphologies were created, with spherical morphology providing higher corrosion performance at the initial stage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Mbulelo Jokazi, Lekhetho S. Mpeta, Tebello Nyokong
Summary: Manganese and cobalt metalated porphyrins attached to graphene quantum dots showed improved electrocatalytic activity for the oxidation of hydrazine, with CoTA(3)CPP-GQDs exhibiting the best catalytic rate constants and lowest limits of detection.
Article
Biochemistry & Molecular Biology
Pinar Sen, Azole Sindelo, Nnaemeka Nnaji, John Mack, Tebello Nyokong
Summary: Novel mono- and dipyridylvinyl boron dipyrromethene dyes were prepared and compared to the corresponding core dyes for their photodynamic antimicrobial chemotherapy (PACT) activities. Results showed that the spectral properties of the dyes and the generation of singlet oxygen could be controlled through pyridylvinyl substitution and iodine atom incorporation, but the pi-extended dyes had lower activities compared to the core dye.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2023)
Article
Oncology
Yolande Ikala Openda, Tebello Nyokong
Summary: Photodynamic antimicrobial chemotherapy (PACT) combined with ciprofloxacin (CIP) effectively reduces the biofilm cell survival of antibiotic-resistant S. aureus and E. coli strains. PACT alone shows no significant activity, while CIP alone exhibits some inhibitory activity. The combination treatment completely eradicates mature biofilms.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Chemistry, Physical
Omotayo Adeniyi, Nnamdi Nwahara, Daniel Mwanza, Tebello Nyokong, Philani Mashazi
Summary: This study developed a highly efficient and stable electrocatalyst material, N-rGONs|NiPcNRs, and successfully applied it in a glucose biosensor, demonstrating excellent analytical performance and potential.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study presents the preparation of cationic thiazole phthalocyanines (Pcs) conjugates with nitrogen doped (NGQDs) and nitrogen/sulfur co-doped (NSGQDs) graphene quantum dots (GQDs). The photo-sonodynamic combinatorial therapy (PSDT) activities of the conjugates were tested in vitro with cancer cell lines. The conjugates exhibited the production of reactive oxygen species (ROS) through the treatment technique. The Pc-GQDs generated singlet oxygen and hydroxyl radicals when exposed to light and low frequency ultrasound in PSDT. Cancer eradication was observed in vitro for the PSDT treatment using the Pc-GQDs conjugates. The NGQDs conjugates performed better in terms of ROS generation and cell eradication compared to the NSGQDs conjugates. The PSDT treatments showed increased ROS generation and cancer eradication efficiencies compared to PDT and SDT monotreatments.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Nobuhle Ndebele, Tebello Nyokong
Summary: This study presents the non-covalent conjugation of carbon-based nanomaterial with tris(4-tert-butylphenoxy)-(5-phenoxylpicolinic acid) phthalocyanato cobalt (II) (CoPc). The hybrids of CoPc with graphene quantum dots (GQDs), nitrogen-doped quantum dots (NGQDs), and single-walled carbon nanotubes (SWCNTs) were successfully synthesized and characterized. The electrochemical analysis showed that the CoPc and its conjugates exhibited good nitrite detection capabilities, with sensitivities (3-28 mu A mu M-1), catalytic rate constants (1.8 x 102-5.42 x 104 M-1 s-1), and limits of detection (0.17-1.70 mu M) comparable to those in literature.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study investigates the effects of ultrasonic frequency and power on the stability, reactive oxygen species yields, and cytotoxicity activities of different substituted ionic phthalocyanines (Pcs) in sonodynamic therapy (SDT). The degradation of Pcs increases with increasing power at Par II. Two reactive oxygen species, singlet oxygen and hydroxyl radicals, were detected in ultrasound treated Pcs. Par I was chosen for SDT, photodynamic therapy (PDT), and photo-sonodynamic therapy (PSDT) due to minimal degradation of most Pcs. PSDT generally shows improved therapeutic efficacies compared to SDT and PDT mono treatments.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Physical
Sithi Mgidlana, Yolande Ikala Openda, Tebello Nyokong
Summary: Zinc phthalocyanine complexes are covalently linked to metallic nanoparticles through amide and ester bonds. The photocatalytic activity of these conjugates is evaluated for the degradation of methylene blue, tetracycline, and diben-zothiophene. The results show that the prepared phthalocyanine complexes exhibit enhanced photocatalytic efficiency in the presence of nanoparticles. Furthermore, the conjugates also demonstrate promising photodynamic antimicrobial chemotherapy activity against Staphylococcus aureus bacteria, with Ag2WO4-based nanoconjugates showing the highest antimicrobial activity compared to other materials.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Azole Sindelo, Pinar Sen, Tebello Nyokong
Summary: New tetra-substituted zinc and indium Schiff base phthalocyanines (ZnPc and InPc) were synthesized and characterized. Cationic derivatives of these Pcs were obtained by reacting ethyl pyrrolidine (ZnPc-2, InPc-2) and propyl pyrrolidine (ZnPc-3, InPc-3) substituted Schiff base Pcs with methyl iodide. The cationic Pcs exhibited higher singlet oxygen quantum yield in aqueous media and showed effective photoinactivation against Methicillin-resistant Staphylococcus aureus (MRSA) and Methicillin-sensitive Staphylococcus aureus (MSSA) strains, depending on the singlet oxygen ability, charges, and alkyl group extension.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Sithi Mgidlana, Pinar Sen, Tebello Nyokong
Summary: Synthetic compounds of asymmetric (A3B) Zn(II) phthalocyanines with dimethoxy phenoxy as the main substituent and (phenoxy) propanoic acid, (phenoxy) acetic acid, and (phenoxy) acrylic acid as other substituents were linked to silver tungstate nanoparticles. The photocatalytic and photodynamic antimicrobial chemotherapy activities of these compounds were evaluated for the degradation of tetracycline and inactivation of S. aureus under visible light irradiation. The results showed that compound 3 exhibited the best performance, attributed to its higher singlet oxygen quantum yield. The mechanism of singlet oxygen generation under visible light was confirmed using EPR. Furthermore, the photoinactivation of S. aureus was enhanced in the presence of tetracycline.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Rodah Soy, Balaji Babu, John Mack, Tebello Nyokong
Summary: A series of tetraarylchlorins with different meso-aryl rings and their Sn(IV) complexes were synthesized and assessed for their potential as photosensitizer dyes for use in photodynamic therapy and photodynamic antimicrobial chemotherapy. The Sn(IV) complexes showed high singlet oxygen quantum yield values and exhibited significant activities against breast cancer cells, as well as planktonic bacteria.
Article
Oncology
Aviwe Magadla, Yolande Ikala Openda, Lekhetho S. Mpeta, Tebello Nyokong
Summary: In this study, we synthesized three phthalocyanine complexes and investigated their effects on photodynamic antimicrobial chemotherapy (PACT) against E.coli and S.aureus in both planktonic and biofilm forms. Complex 4, with 8 cationic charges, showed the highest activity against the biofilms. Surface stability of E.coli and S.aureus biofilms in the presence of complex 4 was analyzed using cyclic voltammetry, and conformational and biochemical changes within the biofilm were studied using scanning electron microscopy (SEM) and Raman spectra.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Oncology
Azole Sindelo, Pinar Sen, Tebello Nyokong
Summary: Antimicrobial photodynamic inactivation (aPDI) is an effective method for eradicating drug-resistant microorganisms due to its minimal possibility of microbial resistance. This study focuses on the preparation and characterization of novel neutral and cationic morpholine containing Schiff base phthalocyanines. The cationic complexes show promising photodynamic activity against various microorganisms, while the neutral complexes are not suitable for antimicrobial studies. The effectiveness of aPDI is dependent on the concentration and light dose.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Chemistry, Multidisciplinary
Mario Gies, Sebastian. L. L. Benz, Mark. M. M. Pradja, Derck Schlettwein, Sangam Chatterjee, Martin Becker, Angelika Polity
Summary: This study investigates the stabilization of the electrochromic switching performance of tungsten oxide by using an ultrathin optimized Al2O3 protective coating. The results show that the additional thin Al2O3 protective layer can effectively prevent degradation and aging of tungsten oxide and achieve a coloration efficiency of 50.4 cm(2) C-1 at 630 nm.
ADVANCED MATERIALS INTERFACES
(2023)
Review
Chemistry, Inorganic & Nuclear
Balaji Babu, John Mack, Tebello Nyokong
Summary: Photodynamic therapy is a cancer treatment that involves a nontoxic photosensitizer, a light source, and ground-state molecular oxygen. Activation of the photosensitizer by light generates reactive oxygen species, which destroy cancer cells.
DALTON TRANSACTIONS
(2023)
