31. Nitroreductase-sensitive fluorescent covalent organic framework for tumor hypoxia imaging in cellsTina Škorjanc, Dinesh Shetty, Sushil Kumar, Damjan Makuc, Gregor Mali, Janez Volavšek, Martina Bergant Marušič, Matjaž Valant, 2023, izvirni znanstveni članek Ključne besede: covalent organic frameworks, imaging, hypoxia, fluorescence, cancer cells Objavljeno v RUNG: 17.05.2023; Ogledov: 1093; Prenosov: 10 Celotno besedilo (1,55 MB) Gradivo ima več datotek! Več... |
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33. Salicylaldehydate coordinated two-dimensional-conjugated metal-organic frameworksAbdul Khayum Mohammed, Pilar Pena-Sánchez, Ajmal Pandikassala, Safa Gaber, Ayesha Alkhoori, Tina Škorjanc, Kyriaki Polychronopoulou, Sreekumar Kurungot, Felipe Gándara, Dinesh Shetty, 2023, izvirni znanstveni članek Ključne besede: metal-organic framework, 2D materials, salicylaldehyde, thin films, mechanochemistry Objavljeno v RUNG: 10.02.2023; Ogledov: 1131; Prenosov: 1 Povezava na datoteko Gradivo ima več datotek! Več... |
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37. Deposition of porphyrin thin films by electrophoresisAndraž Mavrič, Tina Škorjanc, Mads Nybo Sørensen, Changzhu Wu, Matjaž Valant, 2022, objavljeni povzetek znanstvenega prispevka na konferenci Opis: Porphyrins are heterocyclic macrocycles consisting of interconnected pyrrole subunits acting as ligands for metal ions. Metallised metalloporphyrins naturally occur as cofactors in a series of enzymes, acting as active sites for biochemical transformations. Mimicking nature, a variety of functionalized porphyrins have been prepared for different catalytic purposes [1]. These organometallic complexes have isolated metal centers in tailored coordination environments to drive catalytic reactions in homogeneous solutions. The activity and selectivity of isolated metal ions acting as single-atom catalysts are defined by the coordination environment.
Depending on the porphyrin structure, the solubility of these macrocycles and their processability in solutions can be altered. While such adjustments to the structure might ease the processability, the catalytic properties might also be altered. Because homogenous catalysis presents challenges with the separation and recyclability of the catalyst, it is common to fix metalloporphyrins into molecular organic frameworks or deposit them onto a substrate. Commonly used deposition techniques face several challenges. For instance, thermal evaporation can cause partial or complete degradation of some thermally-labile functional groups attached to the porphyrins. Similarly, spin coating commonly results in an uneven thickness and uneven morphology of the deposited films.
To overcome these difficulties, we present an alternative method for the deposition of porphyrin thin films that is suitable for a wide range of functionalized porphyrins. The electrophoresis can force the molecules to deposit on a conductive substrate such as a metal foil or transparent conductive oxide by applying the electric field generated by a DC power supply. The film thickness can be precisely controlled by changing the voltage value, deposition time, or solution concentration using even a small amount of material [2, 3]. Six different functionalized porphyrin molecules have been successfully deposited onto the copper foil substrate by optimizing key parameters, including applied electric field, the duration of electrophoresis, the size of the copper electrodes, and solvent polarity. To demonstrate the generality of our approach, we have selected a broad range of porphyrins that incorporate the following functional groups: phenyl rings, carboxylic acids, pyridyl rings, methyl benzyl ethers, methyl benzoyl esters, and cobalt (II) metalized macrocycle. The impact of this study extends above catalysis to various applications of porphyrins thin films on conductive substrates such as optoelectronics and sensors. Ključne besede: porphyrin, thin film, electrophoresis Objavljeno v RUNG: 26.09.2022; Ogledov: 1127; Prenosov: 0 Gradivo ima več datotek! Več... |
38. Covalent Organic Framework Based on Azacalix[4]arene for the Efficient Capture of Dialysis Waste ProductsTina Škorjanc, Dinesh Shetty, Felipe Gándara, Pascal Simon, Nawavi Naleem, Salma Abubakar, Liaqat Ali, Abdul Khayum Mohammed, Jesus Raya, Serdal Kirmizialtin, 2022, izvirni znanstveni članek Ključne besede: azacalixarene, covalent organic frameworks, dialysis, uric acid, creatinine, adsorption Objavljeno v RUNG: 08.09.2022; Ogledov: 1569; Prenosov: 0 Gradivo ima več datotek! Več... |
39. Polythiacalixarene-embedded gold nanoparticles for visible-light-driven photocatalytic CO [sub] 2 reductionTina Škorjanc, Kamal Khaja Mohaideen, Ayesha Alkhoori, Gregor Mali, Abdul Khayum Mohammed, Zouhair Asfari, Kyriaki Polychronopoulou, Blaž Likozar, Ali Trabolsi, Dinesh Shetty, 2022, izvirni znanstveni članek Ključne besede: Gold, Materials, Metal nanoparticles, Photocatalysis, Polymers Objavljeno v RUNG: 13.07.2022; Ogledov: 1465; Prenosov: 0 Gradivo ima več datotek! Več... |
40. Covalent Organic Polymers and Frameworks for Fluorescence-Based SensorsTina Škorjanc, Dinesh Shetty, Matjaž Valant, 2021, pregledni znanstveni članek Ključne besede: fluorescence, sensors, covalent organic polymers, covalent organic frameworks, quenching, ions, explosives Objavljeno v RUNG: 05.05.2021; Ogledov: 2295; Prenosov: 221 Povezava na celotno besedilo Gradivo ima več datotek! Več... |