Interactions of polyvinylpyrrolidone with imidazolium based ionic liquids: Spectroscopic and Density Functional Theory studies

Preparation of Nanofibers Mats Derived from Task-Specific Polymeric Ionic Liquid for Sensing and Catalytic Applications

“…All these red shifts suggest an interaction between PVP and 6 leading to an intimate blending through electrospinning. This interaction justifies the morphology of the NFs observed by SEM, where no signals of phase separation were appreciated [22].…”

Investigation on functionalization of cotton and viscose fabrics with AgNWs

“…8d). On the Raman spectrum of CO10AgNW and CV15AgNW fabrics, bands at 1235 and 1428 cm -1 corresponded to C-N stretching and C-H bending vibrations of PVP, respectively (Bahadur et al 2016). The presence of the above bands from PVP in the AgNW colloid spectrum was also observed (Figs.…”

Hierarchically structured polymeric ionic liquids and polyvinylpyrrolidone mat-fibers fabricated by electrospinning

“…The intense peak between 1000 and 1300 cm À1 in the spectra of PILs can be assigned to the skeletal symmetric stretching of the imidazolium ring along with components assigned to CH 2 (N) stretching. 48 This band is found at 1161 cm À1 for 4a/PVP and at 1157 cm À1 for 4b/PVP while peaks at 1157 cm À1 and 1154 cm À1 are found for the corresponding original PILs. Finally, the bands at higher wavenumbers (3300 cm À1 to 2700 cm À1 ) corresponding to the symmetric and asymmetric stretching vibrations of the C(4/5)H and C(2)H groups of the imidazolium provide further information.…”

“…This is in good agreement with the values reported in the literature for non-hydrated, partly hydrated and strongly hydrated PVP, 53 and similar contributions have been observed for the interaction with other hydrogen bond donors like Naproxen, 46 or phenolic polymers, 45 and with metal cations or MNPs. [48][49][50][51] For the mat obtained with the PIL having a higher capacity of interaction, 4a/PVP, a broad red-shied C]O signal was observed with the predominant absorption taking place in the 1650-1665 cm À1 region. This cannot be attributed to a stronger hydration of PVP fragments as its water content is lower than that for PVP alone and indicates a strong interaction between the two polymers where coulombic interactions can occur between the oxygen of the PVP carbonyl and the cation moieties in PIL and hydrogen bonding can be established between this amide group and the acidic C-H groups of the imidazolium cation, and including the formation of hydrogen-bonded C]O$$$water/Cl À $$$imidazolium arrays.…”

“…The presence of an amide group in PVP provides this polymer with the capacity to interact with other polymers and with different molecules through hydrogen bonding and coulombic interactions. This has been exploited for the preparation of homogeneous miscible blends with polymers displaying hydrogen donor groups like poly(vinyl alcohol), 41 poly-(vinylphenol), 42 poly(acrylic acid), 43 or the copolymer of Bisphenol A with epichlorohydrin, 44,45 for the formation of blends with different drugs and other active molecules, 46 metal salts, 47 or ILs, 40,48 and for its use as a coating for a variety of NP surfaces. [49][50][51][52] In all these cases, FT-IR studies, particularly involving the carbonyl stretching frequency, have provided essential data to analyze the interactions taking place.…”