Browsing by Author "Nipate, A.B."

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    A croconic acid-derived narrow band gap conjugated microporous polymer
    (Royal Society of Chemistry, 2023) Enoch, S.; Nipate, A.B.; Lakshmi, V.; Malakalapalli, R.R.
    Croconic acid, a novel highly electron-deficient building block, was introduced into a conjugated microporous polymer (CTPA). The CMP possesses strong donor-acceptor interactions, which resulted in near-IR absorption (red edge ∼1350 nm), a narrow bandgap (<1 eV) and high electrical conductivity upon doping (0.1 S m−1). Compared to the squaric acid congener (STPA), CTPA showed superior optical, electronic and electrical properties. © 2023 The Royal Society of Chemistry.
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    Croconic Acid Integrated Zwitterionic Conjugated Porous Polymer for Effective Iodine Adsorption
    (John Wiley and Sons Ltd, 2024) Ravikumar, M.V.; Nipate, A.B.; Deyona, M.J.; Malakalapalli, M.R.; Lakshmi, V.
    Given the rapid growth of the nuclear sector, effective treatment of radioactive iodine is critical. Herein, we report the synthesis and the iodine adsorption properties of croconic acid (CTPB) and squaric acid (STPB) containing ?-conjugated novel zwitterionic conjugated porous polymers (CPPs). The CPPs have been synthesized through a condensation reaction of tris(4-aminophenyl)benzene with croconic acid or squaric acid in high yields (~95 %). The ionic nature of the polymers promoted high iodine/polyiodide vapour adsorption capacity of up to 4.6 g/g for CTPB and 3.5 g/g for STPB under ambient pressure at 80 °C. The zwitterionic framework (croconic acid or squaric acid units) coupled with the aromatic units is expected to effectively capture molecular iodine (I2) and polyiodides (I3? and I5?). The iodine adsorption properties of the polymers have been studied using Fourier-Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Brauner-Emmett-Teller (BET) analysis, and Raman Spectroscopy. Besides this work, there are only three ionic units for effective iodine adsorption. This work demonstrates the importance of zwitterionic units in the porous network reported for iodine adsorption and separation. © 2024 Wiley-VCH GmbH.