Historical Perspective of Advances in Fluorescence Research on Polymer Systems

Procházka, Karel

doi:10.1007/978-3-319-26788-3_5

Cited by 1 publication

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“…Nanosecond relaxation times τ IMM that characterize intramolecular mobility ( IMM ) of a polymer chain fragment containing LM [ 16 , 17 ] were determined using the following equation:

where 1/ P ′ 0 is the parameter related to the amplitude of high-frequency movements of the luminescent marker. This parameter was obtained by extrapolation of the linear part of the 1/ P ( T / η ) plot at high T / η values to T / η =0; T is the absolute temperature (K), η is the solvent viscosity (cP); τ fl is the average lifetime of the excited state of LM bound to the copolymer.…”

Section: Methodsmentioning

confidence: 99%

“…In this paper, the method of polarized luminescence (PL) was used to study the interaction of polyzwitterions with polyacids. The PL method involves measurement of the luminescence polarization ( P ) of solutions of luminescent-labeled polymers [ 16 , 17 , 18 ] and makes it possible to determine nanosecond relaxation times ( τ IMM ) that characterize intramolecular mobility of chain fragments or mobility of a macromolecule as a whole [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Interpolymer Complexes of Poly(methacryloyloxyethyl phosphorylcholine) and Polyacids

et al. 2022

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It has been shown that macromolecules of poly(methacryloyloxyethyl phosphorylcholine) can form hydrogen bonded interpolymer complexes with homo- and copolymers of carboxylic acids and with poly(vinylphosphonic) acid in aqueous solutions. Polarized luminescence and IR spectroscopy were applied in the investigation. Nanosecond relaxation times characterizing the mobility of the chain fragments for the initial luminescent labeled polymers were determined and their changes by a factor of 2–50 were established during the formation of an interpolymer complex. Hydrogen bonds play a dominant role in the formation of these complexes. Hydrophobic interactions serve as an additional stabilizing factor. It is established that poly(methacryloyloxyethyl phosphorylcholine)/poly(vinylphosphonic acid) complex forms a looser structure in comparison with those for polycarboxylic acids as result of electrostatic repulsion between charged groups.

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“…Nanosecond relaxation times τ IMM that characterize intramolecular mobility ( IMM ) of a polymer chain fragment containing LM [ 16 , 17 ] were determined using the following equation:

Section: Methodsmentioning

confidence: 99%