Spectroscopic study of polyphenylquinolines—materials with efficient intramolecular charge transfer

Aleksandrova, E. L.; Svetlichnyi, V. M.; Myagkova, L. A.; Matyushina, N. V.; Некрасова, Т. Н.; Smyslov, R. Yu.; Паутов, В. Д.; Тамеев, А. Р.; Ванников, А. В.; Kudryavtsev, V. V.

doi:10.1134/s0030400x13040036

Cited by 8 publications

(15 citation statements)

References 9 publications

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“…3) measured for the PPQs under study at a wavelength of λ = 395 nm, which was used in the present study and corresponds to the absorption and luminescence excitation edges ( Figs. 1 and 2), are also in good agreement with the results previously obtained at λ = 425 nm [1,2].…”

Section: Introductionsupporting

confidence: 91%

“…1 and 2, respectively. The results for all the PPQs under study are correlated with those obtained previously [1][2][3]. The luminescence spectra (Fig.…”

Section: Introductionsupporting

confidence: 88%

“…It is known [1,2] that the monomer unit of 2,6 poly phenylquinolines (PPQs) of general formula , (1) where X is the bridge group and Ar is the arylene moi ety, is a compound intramolecular charge transfer complex (ICTC) or a donor-acceptor (D-A) com plex between the donor (D) arylene Ar moiety and the acceptor (A) phenilquinoline (PhQ) ring, which is, in turn, a D-A complex between the bridge group X and quinoline ring, i.e., an ICTC in which the arylene moiety and the bridge group between the acceptor quinoline rings are donors.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence-kinetic spectroscopy of compound complexes of polyphenylquinolines

et al. 2015

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Polyphenylquinolines (PPQs), which are compound donor-acceptor complexes, are studied by luminescence kinetic spectroscopy. It is shown that, as the π system becomes stronger on passing from (O, C) to (O, IC) and (PhA, C), an increase in the lifetime τ of the excited state is first observed, and for the strongest charge transfer complex PPQ (PhA, IC), whose luminescence kinetics is described by two exponentials, the lifetime decreases to a value equal to τ of PPQ (O, C). This indicates that this complex has two emitting cen ters localized in the arylene moiety and in the phenylquinoline ring and thereby confirms a previously made conclusion that compound donor-acceptor complexes are formed in polyphenylquinolines with a branched π system of compound D-A complexes.

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Section: Introductionsupporting

confidence: 91%

“…1 and 2, respectively. The results for all the PPQs under study are correlated with those obtained previously [1][2][3]. The luminescence spectra (Fig.…”

Section: Introductionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Luminescence-kinetic spectroscopy of compound complexes of polyphenylquinolines

et al. 2015

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“…From this point of view, nitrogen-containing polymers of the polyphenylquinoline class (PPQ) are of interest. The elementary unit poly-2,6-phenylquinolines (PPQs) [7] comprising an electron-accepting heterocyclic phenylquinoline (PQ) fragments separated by a bridge (X) group and a heteroarylene (Ar) electron donor fragment belong to such polymers (Scheme 1):…”

Section: Introductionmentioning

confidence: 99%

“…It was established that the monomeric unit that PPQ is an intramolecular charge transfer complex [7]. At the same time, electron donor (D) Ar-fragments and electron acceptor (A) PQ cycles form a donor–acceptor (D–A) complex.…”

Section: Introductionmentioning

confidence: 99%

Conductivity and Density of States of New Polyphenylquinoline

et al. 2019

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Electrical, photoelectrical, and optical properties of thin films of a new heat-resistant polyphenylquinoline synthesized using facile methods were investigated. An analysis of the obtained temperature dependences of the dark conductivity and photoconductivity indicates the hopping mechanism of conductivity over localized states arranging at the energy distance of 0.8 eV from the Fermi level located inside the band gap of the investigated material. The optical band gap of the studied material was estimated from an analysis of the spectral dependences of the photoconductivity and absorption coefficient before (1.8–1.9 eV) and after (2.0–2.2 eV) annealing at temperatures exceeding 100 °C. The Gaussian character of the distribution of the localized states of density inside the band gap near the edges of the bands was established. A mechanism of changes in the optical band gap of the investigating polymer under its annealing is proposed.

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Synthesis of polymers and modification of polymeric materials in electromagnetic fields

Пономаренко¹,

Тамеев²,

Шевченко³

2018

Russ. Chem. Rev.

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Data on the effect of electromagnetic fields on polymerization processes are analyzed and integrated. The results of investigation of the response of polymeric systems including polymerization mixtures, polymer solutions, melts and gels to external electromagnetic fields are discussed. Mechanisms of changes in the kinetic parameters of cationic polymerization of certain monomers are considered. They are based on ideas of spatial redistribution of growing macroions and counterions depending on the degree of dissociation of the active sites, which can lead to an increase in the polymerization rate, stabilize it or slow down the process. It is shown that these mechanisms are universal for other ionic systems. Almost all types of polymerization processes are discussed to reveal potential fields of their application in additive manufacturing technologies. High demand for further studies of the effect of electromagnetic fields on polymeric objects is pointed out in connection with the need to solve problems in the design of novel materials and functional structures. The bibliography includes 214 references.

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Spectroscopic study of polyphenylquinolines—materials with efficient intramolecular charge transfer

Cited by 8 publications

References 9 publications

Luminescence-kinetic spectroscopy of compound complexes of polyphenylquinolines

Luminescence-kinetic spectroscopy of compound complexes of polyphenylquinolines

Conductivity and Density of States of New Polyphenylquinoline

Synthesis of polymers and modification of polymeric materials in electromagnetic fields

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