New Blue Light Emissive Polyazomethine(S) Containing Bromo-Triphenyl Units: Synthesis and Photophysics

Khalid, Naila; Bibi, Ahtaram; Akhtar, Khalida; Mustafa, Kashif; Khan, M. Iltaf; Saeed, Nishat

doi:10.1080/03602559.2018.1471719

Cited by 8 publications

(10 citation statements)

References 20 publications

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“…Further, CH 2 bending and CH 3 symmetrical deformation could be observed at 1420 and 1373 cm −1 , respectively [33]. The C-N stretching (amide III groups) of the chitosan material was observed at 1318 cm −1 [34], and the peaks at 1153, 1064 and 1027 cm −1 represented the C-O conjugation [35][36][37]. The observed peak at 1153 cm −1 was the FT-IR peak property for the C-O-C bridge [38].…”

Section: Property Of Functional Groups On the Chitosan Fibermentioning

confidence: 90%

Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber

Park¹,

Kim²,

Kim³

et al. 2020

Sustainability

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Microcystis aeruginosa is one of the predominant species responsible for cyanobacterial-harmful algal blooms (Cyano-HABs) in water bodies. Cyano-HABs pose a growing number of serious threats to the environment and public health. Therefore, the demand for developing safe and eco-friendly solutions to control Cyano-HABs is increasing. In the present study, the adsorptive strategy using chitosan was applied to remove M. aeruginosa cells from aqueous phases. Using a simple immobilization process, chitosan could be fabricated as a fiber sorbent (chitosan fiber, CF). By application of CF, almost 89% of cyanobacterial cells were eliminated, as compared to those in the control group. Field emission scanning electron microscopy proved that the M. aeruginosa cells were mainly attached to the surface of the sorbent, which was correlated well with the measurement of the surface area of the fiber. We tested the hypothesis that massive applications of the fabricated CF to control Cyano-HABs might cause environmental damage. However, the manufactured CF displayed negligible toxicity. Moreover, we observed that the release of cyanotoxins and microcystins (MCs), during the removal process using CF, could be efficiently prevented by a firm attachment of the M. aeruginosa cells without cell lysis. Our results suggest the possibility of controlling Cyano-HABs using a fabricated CF as a non-toxic and eco-friendly agent for scaled-up applications.

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Section: Property Of Functional Groups On the Chitosan Fibermentioning

confidence: 90%

Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber

Park¹,

Kim²,

Kim³

et al. 2020

Sustainability

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“…Conjugated poly(azomethine)s have used in the production of polymeric light emitting diodes (PLED) 7,8 and solar cells 9,10 . Also, they have showed fluorescence properties because of conjuge π‐bonding 11–13 . Furthermore, poly (azomethine)s have the ability to form a good film 14,15 for high‐quantum efficiency, light emitting, sensitivity to photonic and electronic stimuli, macromolecular interaction and multi‐color emission properties when excited at certain wavelengths 16–18 .…”

Section: Introductionmentioning

confidence: 99%

“…9,10 Also, they have showed fluorescence properties because of conjuge π-bonding. [11][12][13] Furthermore, poly (azomethine)s have the ability to form a good film 14,15 for high-quantum efficiency, light emitting, sensitivity to photonic and electronic stimuli, macromolecular interaction and multi-color emission properties when excited at certain wavelengths. [16][17][18] Kaya et al have long studied the thermal, electrochemical, optical, and electrical properties of poly(azomethine)s. 19,20 However, the application areas of aromatic poly(imine)s have limited due to their high-melting points and low-solubilities properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, photophysical and surface properties of poly(amino naphthalene) and its poly(azomethine) compound

Kaya

Akyüz

Özel

2023

J of Applied Polymer Sci

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In this study, 8‐((4‐hydroxybenzylidene)amino)naphthalene‐2‐ol (ANAPSB) compound was synthesized from condensation reaction of 8‐amino‐2‐naphthol (ANAP) with 4‐hydroxybenzaldehyde and then ANAPSB and 8‐amino‐2‐naphthol were polymerized via oxidative polycondensation alkaline medium by H2O2 (35% aqueous solution) as oxidant at 70°C 14 h. The structures of compounds were confirmed by UV–Vis, 1H‐13C‐NMR and FT‐IR measurements. The surface morphologies of PANAP and PANAPSB were examined with SEM analyses. The electrochemical properties of 8‐amino‐2‐naphthol, poly(8‐amino‐2‐naphthol) (PANAP), ANAPSB and poly(8‐((4‐hydroxybenzylidene)amino)naphthalene‐2‐ol) (PANAPSB) were determined by cyclic voltammetry technique. The thermal properties of compounds were found by TG‐DTA analysis. The glass transition temperatures (Tg) of PANAP and PANAPSB were determined from DSC measurements. The Tg values of PANAP and PANAPSB were found to be 159 and 150°C, respectively. The Mn, Mw, Mp, Mz and PDI values of the PANAP and PANAPSB were calculated from gel permeation chromatography measurements. The optical and fluorescence properties of the compounds were determined by UV–Vis and fluorescence measurements, respectively. The optical band gap values of ANAP, PANAP, ANAPSB and PANAPSB were calculated as 3.12, 1.61, 2.79 and 1.57 eV, respectively.

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“…Polyazomethines, also known as poly(Schiff base)s or polyimines, with general structure (R–CH=N–R′), are a group of organic conducting polymers [4,5] exhibiting excellent thermal [6,7,8], and mechanical properties. Conjugated polyazomethines show interesting optical [9,10,11,12], optoelectronic [13,14,15], and electrical [6,16,17,18] properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structures, and Spectroscopic Characterization of Bis-aldehyde Monomers and Their Electrically Conductive Pristine Polyazomethines

et al. 2019

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Bis-aldehyde monomers 4-(4′-formyl-phenoxy)benzaldehyde (3a), 3-methoxy-4-(4′-formyl-phenoxy)benzaldehyde (3b), and 3-ethoxy-4-(4′-formyl-phenoxy)benzaldehyde (3c) were synthesized by etherification of 4-fluorobenzaldehyde (1) with 4-hydroxybenzaldehyde (2a), 3-methoxy-4-hydroxybenzaldehyde (2b), and 3-ethoxy-4-hydroxybenzaldehyde (2c), respectively. Each monomer was polymerized with p-phenylenediamine and 4,4′-diaminodiphenyl ether to yield six poly(azomethine)s. Single crystal X-ray diffraction structures of 3b and 3c were determined. The structural characterization of the monomers and poly(azomethine)s was performed by FT-IR and NMR spectroscopic techniques and elemental analysis. Physicochemical properties of polymers were investigated by powder X-ray diffraction, thermogravimetric analysis (TGA), viscometry, UV–vis, spectroscopy and photoluminescence. These polymers were subjected to electrical conductivity measurements by the four-probe method, and their conductivities were found to be in the range 4.0 × 10−5 to 6.4 × 10−5 Scm−1, which was significantly higher than the values reported so far.

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New Blue Light Emissive Polyazomethine(S) Containing Bromo-Triphenyl Units: Synthesis and Photophysics

Cited by 8 publications

References 20 publications

Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber

Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber

Synthesis, characterization, photophysical and surface properties of poly(amino naphthalene) and its poly(azomethine) compound

Synthesis, Crystal Structures, and Spectroscopic Characterization of Bis-aldehyde Monomers and Their Electrically Conductive Pristine Polyazomethines

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