The synthesis and characterisation of planar oligophenol with Schiff base substitute

Kaya, İsmet; Demir, Hacı Ökkeş; Vilayetoǧlu, Adalet R.

doi:10.1016/s0379-6779(01)00501-x

Cited by 81 publications

(48 citation statements)

References 7 publications

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“…The small peak at 1677 cm À1 was attributed to the carbonyl (C ¼ O) stretching vibration, which may be formed by oxidation of the imine groups within the polymer pendent groups. 8,11 These data showed that the polymer obtained from 4-PHMP was also composed of a mixture of phenylene and oxyphenylene units.…”

Section: Structures Of 4-phmp and Poly(4-phmp)mentioning

confidence: 91%

“…If the aromatic-imine group is attached to the benzene rings of polyphenols, the conjugation lengths can be increased. Kaya et al 8 synthesized oligo-2-ptolylazomethinephenol with phenylazo pendent groups for the first time. Thus far, the detailed polymerization behaviors of the oxidative polycondensation of NO-type phenoxy imines have been widely investigated by Kaya et al and others.…”

Section: Introductionmentioning

confidence: 99%

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A novel polyphenol: synthesis, characterization and investigation of its thermal and electrochemical properties

Demir

2012

Polym J

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The chemical synthesis of a new type of polyphenol was achieved by oxidative polycondensation of 4-((2-phenylhydrazono)methyl) phenol (4-PHMP). The polymerization of 4-PHMP was performed using sodium hypochlorite and air (O 2 ) as oxidizing agents in an aqueous alkaline medium under various polymerization conditions. The molecular weight of the polymer was determined by gel permeation chromatography, and the polymeric structure was characterized by elemental analysis, ultraviolet-visible, Fourier transform infrared and nuclear magnetic resonance techniques. In addition, thermal and electrochemical properties of the synthesized compounds were investigated. According to electrochemical measurements, the polymer had a low band gap (E g 0 ¼ 1.52 eV) and appeared to be an interesting candidate for solar-cell applications.

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Section: Structures Of 4-phmp and Poly(4-phmp)mentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

A novel polyphenol: synthesis, characterization and investigation of its thermal and electrochemical properties

Demir

2012

Polym J

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“…Premachandran et al [7] reported the synthesis of naphthol-based polymers to increase the conjugation lengths in the backbone. The polyphenols with longer conjugation lengths in polymer main chain and pendent groups have also been reported by Kayak et al [8]. However, most of these polymers which possess phenylazo (C 6 H 5 -N=CH-) pendent groups have not sufficiently semiconductive properties without doping.…”

Section: Introductionmentioning

confidence: 57%

Poly(phenoxy-imine)s and Poly(phenoxy-ketimine)s: Toward New Semiconductive Polymeric Materials

Demir¹

2017

MOJPS

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Conjugated polymers have attracted widespread interest during the last three decades, because of their useful electronic properties. In this paper we discuss semi-conductive properties of the conjugated polymers with phenylhydrazono (C 6 H 5 -NH-N=C-(R/H)-) pendent groups, such as poly(phenoxy-imine)s and poly(phenoxy-ketimine)s. These polymers were found to possess the conductivity of 10 -3 -10 -2 S/cm. It is supposed that high conductivities of the polymers are due to their phenylhydrazono type structures with π-conjugation with participation of the nitrogen atoms in polymer side groups.Keywords: Conjugated polymers; Semi-conductive polymer; Poly(phenoxy-imine) s; Poly(phenoxy-ketimine)s; Oxidative coupling polymerization; Gel permeation chromatography Poly(phenoxy-imine)s and Poly(phenoxy-ketimine)s: Toward New Semiconductive Polymeric Materials 2/6Copyright: ©2017 Demir literature (As can be seen in Supplementary Information, (Table 1-3). They can be seen that the highest conductivity values belong to poly(4-PHMP) and poly(3-PHEP). This is because of the polyconjugated structures of the polymers with phenylhydrazono pendent groups that increase electrical conductivity values. Having this feature, these polyphenols step forwards in comparison with other imine-substituted polyphenols. The results obtained in this study are compatible with the values in literature. *: These data demostrated the maximum (or saturated) conductivity after iodine doping. 2/6 Poly(phenoxy-imine)s and Poly(phenoxy-ketimine)s: Toward New Semiconductive Polymeric Materials 5/6Copyright: ©2017 Demir Further work is being carried out in our laboratory to synthesis and characterization of other polyphenols containing phenylhydrazono pendent groups and to investigation of their properties such as conductivity and some properties. These results will be published soon in a full paper. AcknowledgementThe author thanks Dr. Ilkay Ozaytekin for measuring the electrical conductivity. Conflict of InterestNone.

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“…[14][15][16] The Schiff base polymers demonstrate antimicrobial activity against bacteria, yeast and fungi. 17,18 Thus these can be used for the purification of industrial contaminants from heavy metals and microbiological organisms and are significant for environmental applications. These polymers are also being studied for the applications of optoelectronics.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Biological Studies of New Linear Thermally Stable Schiff Base Polymers with Flexible Spacers

Qureshi

Khuhawar

Jahangir

et al. 2016

ACSi

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Five new linear Schiff base polymers having azomethine structures, ether linkages and extended aliphatic chain lengths with flexible spacers were synthesized by polycondensation of dialdehyde (monomer) with aliphatic and aromatic diamines. The formation yields of monomer and polymers were obtained within 75-92%. The polymers with flexible spacers of n-hexane were somewhat soluble in acetone, chloroform, THF, DMF and DMSO on heating. The monomer and polymers were characterized by melting point, elemental microanalysis, FT-IR, 1 HNMR, UV-Vis spectroscopy, thermogravimetry (TG), differential thermal analysis (DTA), fluorescence emission, scanning electron microscopy (SEM) and viscosities measurement of their dilute solutions. The studies supported formation of the monomer and polymers and on the basis of these studies their structures have been assigned. The synthesized polymers were tested for their antibacterial and antifungal activities.

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The synthesis and characterisation of planar oligophenol with Schiff base substitute

Cited by 81 publications

References 7 publications

A novel polyphenol: synthesis, characterization and investigation of its thermal and electrochemical properties

A novel polyphenol: synthesis, characterization and investigation of its thermal and electrochemical properties

Poly(phenoxy-imine)s and Poly(phenoxy-ketimine)s: Toward New Semiconductive Polymeric Materials

Synthesis, Characterization and Biological Studies of New Linear Thermally Stable Schiff Base Polymers with Flexible Spacers

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