HYPERVALENT IODINE COMPOUNDS WITH HALOGEN-CONTAINING AND PHOSPHINATE LIGANDS
In modern organic chemistry, hypervalent (HV) iodine(III) compounds have been used widely as oxidizing agents but applications of λ3-iodanes in polymer and material chemistry is still underexplored. In the first project, a new series of heterocyclic HV iodine(III) compounds with I–Cl bonds and various substituents at the N atom were synthesized and successfully employed in the synthesis of highly branched polymers when added to mixtures of styrene and 1,4-divinylbenzene containing 10–80 mol% of the divinyl crosslinker, or even pure crosslinker. HV iodine(III) also can be utilized for polymer modification. HV iodine(III) compounds with fluorine-containing ligands (F, CF3, C6F5CO2, or CF3(CF2)8CO2 (n-C9F19CO2)) reacted, in the presence of iodine or copper salts, with the double bonds in cis-1,4-polyisoprene (polyIP) to afford fluorine-containing polymers. The modified polymers showed relatively good thermal stability and high hydrophobicity, with contact angles toward water in the range of 89–116°. HV iodine(III) compound with phosphate ligand was also utilized for the modification of polyIP to prepare the phosphorus-containing material, which is promising as flame retardant.
Nicolay V Tsarevsky
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cao, yakun, "Hypervalent Iodine Compounds With Halogen-Containing and Phosphinate Ligands" (2020). Chemistry Theses and Dissertations. 17.