1. Hydrophobicity Tuning in Isostructural Urchin-Shaped Covalent Organic Framework Nanoparticles by Pore Surface Engineering for Oil–Water SeparationGobinda Das, Tina Skorjanc, Thirumurugan Prakasam, Bikash Garai, Salma Abubakar, Christina Zalch Saad, Felipe Gandara, Renu Pasricha, Sudhir Kumar Sharma, Sabu Varghese, Ramesh Jagannathan, Mark A. Olson, Ali Trabolsi, 2022, original scientific article Keywords: Adsorption, Covalent organic frameworks, Hydrophobicity, Lipids, Materials
Published in RUNG: 26.09.2022; Views: 3148; Downloads: 0
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2. Taming the topology of calix[4]arene-based 2D-covalent organic frameworks : interpenetrated vs noninterpenetrated frameworks and their selective removal of cationic dyesBikash Garai, Dinesh Shetty, Tina Škorjanc, Felipe Gándara, Nawavi Naleem, Sabu Varghese, Sudhir Kumar Sharma, Maria Baias, Ramesh Jagannathan, Mark Anthony Olson, 2021, original scientific article Abstract: A bowl-shaped calix[4]arene with its exciting host–guest chemistry is a versatile supramolecular building block for the synthesis of distinct coordination cages or metal–organic frameworks. However, its utility in the synthesis of crystalline covalent organic frameworks (COFs) remains challenging, presumably due to its conformational flexibility. Here, we report the synthesis of a periodic 2D extended organic network of calix[4]arenes joined by a linear benzidine linker via dynamic imine bonds. By tuning the interaction among neighboring calixarene units through varying the concentration in the reaction mixture, we show the selective formation of interpenetrated (CX4-BD-1) and non-interpenetrated (CX4-BD-2) frameworks. The cone-shaped calixarene moiety in the structural backbone allows for the interweaving of two neighboring layers in CX4-BD-1, making it a unique example of interpenetrated 2D layers. Due to the high negative surface charge from calixarene units, both COFs have shown high performance in charge-selective dye removal and an exceptional selectivity for cationic dyes irrespective of their molecular size. The charge distribution of the COFs and the resulting selectivity for the cationic dyes were further investigated using computational methods.
Keywords: dyes and pigments, covalent organic frameworks, adsorption, layers, chemical structure
Published in RUNG: 16.03.2021; Views: 3550; Downloads: 0
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3. Immobilization of Redox-Responsive Switches Into Calixarene-Based Covalent Organic Polymers for Environmental ApplicationsTina Skorjanc, Dinesh Shetty, Sudhir Kumar Sharma, Jesus Raya, Dong Suk Han, Ramesh Jagannathan, Ali Trabolsi, 2017, unpublished conference contribution Keywords: calixarene, redox switches, dye adsorption
Published in RUNG: 03.09.2020; Views: 3562; Downloads: 0
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5. Morphological diversity in nanoporous covalent organic materials derived from viologen and pyreneGobinda Das, Tina Škorjanc, Sudhir Kumar Sharma, Thirumurugan Prakasam, Carlos Platas-Iglesias, Dong Suk Han, Jesus Raya, John-Carl Olsen, Ramesh Jagannathan, Ali Trabolsi, original scientific article Keywords: covalent organic polymers, hollow tube, polymers, porous materials, iodine capture
Published in RUNG: 02.09.2020; Views: 3960; Downloads: 0
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