Bis[2-(4-pyridyl)ethyl](2-cyanoethyl)phosphine Oxide: Synthesis and Reactions with 1,4-Dihalobutanes

Main-Chain Cationic Polyelectrolytes: Design, Synthesis, and Applications

“…The non-conjugated, non-chromophoric main-chain cationic polyelectrolytes are mostly prepared by substitution polymerization from alkylene dihalide derivatives and tertiary diamines or nitrogen-containing heterocycles (such as imidazole or pyridine) linked with a spacer. , Hydroboration polymerization is another new approach to obtain this type of polyelectrolyte . Such polyelectrolytes mostly find their applications in antibacterial agents , or ion transport or as an interlayer material in dye-sensitized solar cells …”

“…9,62 Hydroboration polymerization is another new approach to obtain this type of polyelectrolyte. 42 Such polyelectrolytes mostly find their applications in antibacterial agents 6,40 or ion transport 41 or as an interlayer material in dye-sensitized solar cells. 62 ■ ADVANTAGES OF MAIN-CHAIN POLYELECTROLYTES Main-chain polyelectrolytes, in some cases, are superior to the side-chain variant.…”

“…62 20) that was quaternized using 1,4-dihalobutane to obtain cationic polyelectrolytes (P33a and P33b; Scheme 25). 42 These polyelectrolytes were soluble in water and showed electrical conductivities in the range from 1 × 10 −3 to 3 × 10 −3 S cm −1 . Both of the polyelectrolytes interacted with natural (heparin) or synthetic [poly(acrylic acid)] polyanions to form a polyelectrolyte complex.…”

“…In 2019, Verkhoturova et al synthesized bis­[2-(4-pyridyl)­ethyl]­(2-cyanoethyl)­phosphine ( 19 ), which was oxidized instantly in the presence of air to form bis­[2-(4-pyridyl)­ethyl]­(2-cyanoethyl)­phosphine oxide ( 20 ) that was quaternized using 1,4-dihalobutane to obtain cationic polyelectrolytes ( P33a and P33b ; Scheme ). These polyelectrolytes were soluble in water and showed electrical conductivities in the range from 1 × 10 –3 to 3 × 10 –3 S cm –1 . Both of the polyelectrolytes interacted with natural (heparin) or synthetic [poly­(acrylic acid)] polyanions to form a polyelectrolyte complex.…”

“…Non-conjugated, Non-chromophoric Main-Chain Cationic Polyelectrolytes. Several other main-chain cationic polyelectrolytes were synthesized from epoxy compound, 40 organoboron compound, 41 imidazolium, 9 and phosphine oxide 42 based compounds containing mainly different flexible linkers, such as methylene, oxymethylene, and alkyl bridges (Chart 4). These types of polyelectrolytes were prepared mostly for biological applications, such as antibacterial and antifungal material.…”