A5004385391- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- Gas Sensing Nanomaterials and Sensors
- Perovskite Materials and Applications
- Polyoxometalates: Synthesis and Applications
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Advanced battery technologies research
- Luminescence Properties of Advanced Materials
- Oxidative Organic Chemistry Reactions
- Electrocatalysts for Energy Conversion
- Membrane Separation and Gas Transport
- Nanoplatforms for cancer theranostics
- Chemical Synthesis and Reactions
- Chemical Synthesis and Characterization
National University of Singapore
2023-2024
Indian Association for the Cultivation of Science
2016-2024
The Ohio State University
2024
Metal-free catalysis for electrocatalytic hydrogen evolution from water is very demanding the production of sustainable and clean fuel. Herein, we report synthesis a porphyrin-based metal-free covalent organic polymer (TpPAM) through simple condensation between triformyl phloroglucinol (Tp) 5,10,15,20-tetra(4-aminophenyl)-21H,23H-porphyrin (PAM). The as-prepared porous TpPAM exhibited superior activity reaction (HER) current density 10 mA cm–2 at low overpotential 250 mV small Tafel slope...
Covalent organic frameworks (COFs) promise several benefits as materials in terms of gas adsorption, for use optoelectronic devices, <italic>etc.</italic>
A new benzimidazole-based covalent organic polymer has been synthesized through the condensation polymerization reaction and shown a high energy storage capacity with specific capacitance of 335 F g<sup>−1</sup> at 2 mV s<sup>−1</sup> scan rate good cyclic stability 93% retention its initial after 1000 cycles.
Oxygen evolution reaction (OER) is energetically challenging from the platform of making many photovoltaic devices such as metal-air batteries and water splitting systems because its poor kinetics even when precious metals are used. Herein, a Co(II)-porphyrin/pyrene-comprised conjugated microporous polymer Co-MPPy-1 has been developed which shows efficient OER in alkaline medium. The material was characterized by Fourier transform infrared, solid-state 13C cross-polarization magic angle...
Covalent organic frameworks (COFs) are of increasing interest in the field materials science. Polymerizations topologically fitted monomers into two-dimensional (2D) structures with a periodic order often make them crystalline. The existence this structural periodicity and regular pores makes effective for facile ion transport storage applications. We report herein new porphyrin-based 2D COF using Schiff base condensation reaction between 5,10,15,20-tetrakis(para-amino phenyl) porphyrin...
Luminescent covalent organic frameworks (LCOFs) have been employed as platforms for sensing analytes. Judicial incorporation of appropriate functional units inside the framework leads to different electronic states in presence external stimuli, e.g., temperature, pH, etc. We report herein a new COF (TPEPy) solid-state acid sensor specific highly acidic environments that range from pH ∼0.5 ∼3.0. This shows protonation-induced reversible color change bright yellow deep red upon decreasing 3...
Abstract We report the synthesis of a new porous polymeric network (PPN) using triphenylamine and α,α‐dibromo‐ p ‐xylene by Friedel–Crafts alkylation promoted anhydrous FeCl 3 as an oxidizing agent. Sulfonation PPN led to sulfonated (SPPN) having high surface acidity BET area. characterized SPPN materials thoroughly powder XRD, FTIR spectroscopy, 13 C solid‐state magic‐angle spinning NMR, field‐emission SEM, high‐resolution TEM, N 2 sorption techniques. The material was then employed...
Abstract Covalent organic frameworks (COFs) are an attractive class of materials for sensing applications due to their inherent crystallinity, high surface area, and designable framework functionalities. While the majority COFs have electrical resistance, making it difficult harness these electronic sensors, real‐time impedance spectroscopy can enable gas vapor a much wider range COFs. Herein, set post‐synthetically modified (PSM) explored though straightforward one‐step substitution...
Isoporous nanomaterials, with their proven potential for accurate molecular sieving, are of substantial interest in propelling sustainable membrane techniques. Covalent organic frameworks (COFs) prominent due to customizable isopores and chemistry. Still, the discrepancy experimental theoretical structures poses a challenge developing COF membranes separations. Here, we report high‐selectivity sieving complex ultrafine molecules through solvating pore‐to‐pore‐aligned two‐dimensional...
Isoporous nanomaterials, with their proven potential for accurate molecular sieving, are of substantial interest in propelling sustainable membrane techniques. Covalent organic frameworks (COFs) prominent due to customizable isopores and chemistry. Still, the discrepancy experimental theoretical structures poses a challenge developing COF membranes separations. Here, we report high‐selectivity sieving complex ultrafine molecules through solvating pore‐to‐pore‐aligned two‐dimensional...
Abstract Conjugated organic cations are intriguing for organic‐inorganic halide perovskites due to their direct participation in the optoelectronic properties of hybrid materials. In conjugated cations, dihedral angle, or torsion between adjacent aromatic rings is a critical secondary structural element. This angle influences not only shape but also overlap π‐orbitals on rings, thereby affecting electronic properties. Understanding how variations impact structure and metal halides (HOIMHs)...