A5064321938- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Carbon Dioxide Capture Technologies
- Advanced Photocatalysis Techniques
- Luminescence and Fluorescent Materials
- Caching and Content Delivery
- Advanced battery technologies research
- Carbon dioxide utilization in catalysis
- Conducting polymers and applications
- Perovskite Materials and Applications
- CO2 Reduction Techniques and Catalysts
- Chemical Synthesis and Reactions
- Gas Sensing Nanomaterials and Sensors
- Radioactive element chemistry and processing
- Machine Learning in Materials Science
Indian Institute of Science Education and Research Pune
2019-2024
Covalent organic frameworks are a new class of crystalline polymers possessing high surface area and ordered pores. Judicious selection building blocks leads to strategic heteroatom inclusion into the COF structure. Owing their area, exceptional stability molecular tunability, COFs adopted for various potential applications. The heteroatoms lining in pores favor synergistic host-guest interaction enhance targeted property. In this report, we have synthesized resorcinol-phenylenediamine-based...
Ultramicroporous MOFs enable tight packing of the active functional groups, directly impacting selective guest–framework interactions.
Abstract Here, we report two novel water‐stable amine‐functionalized MOFs, namely IISERP‐MOF26 ([NH 2 (CH 3 ) ][Cu O(Ad)(BDC)]⋅(H O) (DMA), 1 and IISERP‐MOF27 ] 1/2 [Zn 4 O(Ad) (BDC) ]⋅(H (DMF) , ), which show selective CO capture capabilities. They are made by combining inexpensive readily available terephthalic acid N‐rich adenine with Cu Zn, respectively. possess 1D channels decorated the free amine group from polarizing oxygen atoms terephthalate units. Even more, there dimethyl ammonium...
Carbon capture from industrial effluents such as flue gas or natural mixture (cf. landfill gas), the primary sources of CO2 emission, greatly aids in balancing environmental carbon cycle. In this context, most energy-efficient physisorptive separation process can benefit immensely improved porous sorbents. Metal organic frameworks (MOFs), especially ultramicroporous MOFs, built readily available small and rigid ligands, are highly promising because their high selectivity (CO2/N2) easy...
Developing stable active catalysts for reducing water-soluble pollutants is a desirable target. In this pursuit, we have functionalized covalent organic frameworks (COFs) with gold (Au) and cobalt (Co) nanoparticles via one-step aqueous synthesis process, their catalytic activity in methyl orange methylene blue examined. Operando absorbance measurements of (anionic dye) reduction revealed AuCoCOF (1.3 Au/1.0 Co) to superior kinetics over many other catalysts, which typically require...
Electrochemical deposition from an electrolyte containing Cu 2+ loads Cu(0) nanoparticles (3.34 wt%) into a COF, making them resemble single-site catalyst. This Cu@COF serves as excellent heterogeneous catalyst for multi-fold Ullmann coupling reactions.
CALF-20, a zinc-triazolato-oxalate MOF, [Zn2(tz)2(Ox)]·solvent, is an industrially practiced ultramicroporous MOF sorbent. In some interesting structural transformations occur during its humid CO2 capture. Even though structure simple, the design of superior sorbents based on still not straightforward. Hence, broader investigation these Zn-triazolato-oxalate frameworks with new outlook necessary. Herein, we report Zn-aminotriazolato-oxalate (IISERP-MOF35, [(CH3)2NH2]2[Zn5(Atz)4(Ox)4]·2H2O),...
Adaptable polymer-based solid-state electrolytes can be a game-changer toward safe, lightweight flexible batteries. We present robust Bakelite-type organic polymer covalently decked with viologen, triazine, and phenolic moieties. Its structure cationic viologen centers incorporates counter-balancing free hydroxide ions into the polymeric framework. By design, aromatic groups heteroatoms in framework activated under an applied potential to prompt push-pull drive, setting off towing of via...
Methane is an important alternative fuel, and upgrading it to improve fuel efficiency imperative target. Solid sorbents capable of selectively removing the major impurities CO2 N2 from natural gas contribute immensely this process. We report a porous 3D iron-MOF built by linking scarce Fe4O18N2 clusters through readily available terephthalate diaminotrizaole ligands. The 1-D channels with high density polarizing amine groups, aromatic rings, carboxylate oxygen adsorb even less polarizable...
A composite of catalytic Lewis acidic zirconium oxyhydroxides (8 wt %) and a covalent organic framework (COF) was synthesized. X-ray diffraction infrared (IR) spectroscopy reveal that COF's structure is preserved after loading with oxyhydroxides. Electron microscopy confirms homogeneous distribution nano- to sub-micron-sized clusters in the COF. 3D tomography captures micron-sized channels connecting well-dispersed on The crystalline ZrOx(OH)y@COF's nanostructure model-optimized via...
Coordination flexibility assisted porosity has been introduced into an Iron-isonicotinate metal-organic framework (MOF), (Fe(4-PyC)2 ⋅ (OH). The showed CO2 -specific gate opening behavior, which gets tuned as a function of temperature and pressure. MOF's physisorptive towards , CH4 N2 was investigated; it adsorbed only via phenomenon. isonicotinate, representing borderline soft base, is bound to the hard Fe3+ centre through monodentate carboxylate pyridyl nitrogen. This moderately weak...
Three C–C bonded porous organic polymers are assembled by reacting rigid monomers (triformylphenol, triformylphloroglucinol, triformylresorcinol) with pyrrole in a catalyst-free solvothermal reaction.
Quasi-solid-state rechargeable zinc-air batteries (ZABs) are suitable for the generation of portable clean energy due to their high and power density, safety, cost-effectiveness. Compared typical alkaline aqueous electrolyte in a ZAB, polymer or gel-based electrolytes can suppress dissolution zinc, preventing precipitation undesirable irreversible zinc compounds. Their low electronic conductivity minimizes dendrite formation. However, gel suffer from capacity fade loss volatile solvent,...
Covalent organic frameworks (COFs) represent bulk crystalline polymers characterized by their significant surface area and well-organized pores. By carefully selecting building blocks, we can tailor COF structures with strategically placed heteroatoms. This deliberate inclusion enhances stability, area, guest-binding ability, which make them highly versatile catalyst supports. Importantly, heteroatoms within pores under an applied potential amplify the catalyst's desired properties. FeOOH,...
A carboxylic acid functionalized sp 3 N-rich imine bonded COF shows a humidity-dependent visible color change. This is easily exfoliated to nanosheets, which are explored as potential humidity sensor that detects trace water in organic solvents.