Efficient Iodine
Uptake of Ultra Thermally Stable
Conjugated Copolymers Bearing Biaceanthrylenyl Moieties and Contorted
Aromatic Units Using a [3 + 2] Palladium-Catalyzed Cyclopolymerization
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posted on 2023-11-01, 04:03authored byNoorullah Baig, Suchetha Shetty, Rupa Bargakshatriya, Sumit Kumar Pramanik, Bassam Alameddine
A novel series of
copolymers made from alternating aromatic
surrogates
with contorted and spiro compounds, denoted as BCP1–3, was successfully synthesized employing a palladium-catalyzed one-pot
[3 + 2] cyclopentannulation reaction. The resulting copolymers BCP1–3, which were isolated in high yields, exhibited
weight-average molecular weights (Mw)
ranging from 11.0 to 61.5 kg mol–1 (kDa) and polydispersity
index (Mw/Mn) values in the range of 1.7 and 2.0, which suggest a narrow molecular
weight distribution, thus indicating the formation of uniform copolymer
chains. Investigation of the thermal properties of BCP1–3 by thermogravimetric analysis disclosed outstanding stability with
10% weight loss temperature values reaching 800 °C. Iodine adsorption
tests revealed remarkable results, particularly for BCP2, which demonstrated a strong affinity toward iodine reaching an
uptake of 2900 mg g–1. Additionally, recyclability
tests showcased the effective regeneration of BCP2 after
several successive iodine adsorption–desorption cycles.