Fiber-Forming Polyazomethines with Triarylmethane Fragments in the Main Chain and Their Properties

Борукаев, Т. А.; Шаов, А. Х.; Хараев, А. М.; Бажева, Р. Ч.; Pashtova, L.R.; Маламатов, А. Х.; Shogenov, V. Kh.

doi:10.1007/s10692-018-9913-3

Cited by 2 publications

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“…Schiff base polymers also called polyimines or polyazomethines (CH=N) have been the subject of interest from last several decades and prepared by the polycondensation reaction of carbonyl compounds (dialdehydes or diketones) with aliphatic or aromatic diamines. [1][2][3] The researchers are attracted towards the synthesis of new polyimines because of their advantageous properties such as liquid-crystalline, 4 fluorescence, 5,6 optical and electronic properties, 7,8 high thermal stability, 9,10 fiber forming, 11,12 thin film forming, [13][14][15] coordination abilities with metal ions 16 and antimicrobial activities. 17,18 These properties make them important candidate for application in solar cells, 19,20 optoelectronic sensors, 21 photo-luminescent devices, 22 aerospace, 23 packaging materials and antifouling paints.…”

Section: Introductionmentioning

confidence: 99%

New Fluorescent, Thermally Stable and Film Forming Polyimines Containing Naphthyl Rings

Qureshi

Khuhawar

Jahangir

2019

ACSi

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Three new aliphatic-aromatic polymers having naphthyl rings were prepared by the polycondenstion of dialdehydes or diketone monomers with 1,5-naphthalenediamine or 1,4-phenylenediamine. The monomers were prepared by the reaction of aromatic aldehyde or ketone with 1,6-dibromohexane. The molecular mass of the monomers was confirmed through E.I mass spectroscopy. The structures of monomers and polymers were characterized by 1 HNMR, FT-IR, UV-Vis Spectroscopy, SEM and TG/DTA. Fluorescence emissions of monomers and polymers were recorded and their quantum yields were calculated, all the compounds showed fluorescence property and indicated violet, blue-green, orange and red light emissions. The quantum yields of the polymers were obtained within the range of 0.04 to 24.3%. The semicrystalline and amorphous nature of the polymers was analyzed through powdered X-ray diffraction. Antimicrobial activities of the polymers were examined against different bacterial and fungal species. Thin film forming ability of the synthesized polymers was evaluated by making their blends with PVC (poly vinyl chloride) in different w/w% ratios.

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Section: Introductionmentioning

confidence: 99%

New Fluorescent, Thermally Stable and Film Forming Polyimines Containing Naphthyl Rings

Qureshi

Khuhawar

Jahangir

2019

ACSi

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Synthesis, characterization and application of soluble fully conjugated polyazomethine from di‐ or trifunctional monomers

Zang

Takata

et al. 2022

Polymer International

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Fully conjugated polyazomethines (PAZs) exhibit large amounts of micropores among their many short branches in relatively planar structures based on their fully conjugated configuration. However, these fully conjugated structures cause insolubility and non‐processability of the PAZs because they may have strong stacking interactions due to their planar structures. In this paper, to overcome this problem, three short lengths of oligodimethylsiloxane (ODMS) grafts (x = 9, 18 and 39) were introduced by end‐capping reaction of aldehydes at the end of insoluble PAZs with amino‐terminated ODMSs as end‐capping agents. As a result, the insoluble PAZs became almost soluble (solubility > 95–100%) and their molecular weight could be estimated using gel permeation chromatography (Mw = 15.9 × 103 g mol−1). PAZ‐embedded mixed‐matrix membranes (MMMs) were fabricated using blend solutions containing only small amounts (1.0 wt%) of the solubilized PAZs with ODMS grafts and crosslinked polydimethylsiloxane (PDMS). The PAZs/PDMS MMMs showed ultrahigh permeability to oxygen which achieved 8600 barrer without a decrease of the original permselectivity of PDMS. The excellent oxygen permeability of the PAZs/PDMS MMMs may be caused by an effective increase of porosity based on the fully conjugated PAZ nanosheet. © 2022 Society of Industrial Chemistry.

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Fiber-Forming Polyazomethines with Triarylmethane Fragments in the Main Chain and Their Properties

Cited by 2 publications

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New Fluorescent, Thermally Stable and Film Forming Polyimines Containing Naphthyl Rings

New Fluorescent, Thermally Stable and Film Forming Polyimines Containing Naphthyl Rings

Synthesis, characterization and application of soluble fully conjugated polyazomethine from di‐ or trifunctional monomers

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