Synthesis and characterization of a novel polyazomethine ether for NLO application

Dutta, Pradip Kumar; Jain, Prem C.; Sen, Pratima; Trivedi, Rashmi; Dutta, Joydeep

doi:10.1016/s0014-3057(02)00328-2

Cited by 49 publications

(21 citation statements)

References 3 publications

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“…1 Polymers with a system of -HC=N-bonds in their main chain have been drawing attention of researches due to their importance in many aspects such as high thermal stability, excellent mechanical strength, good optoelectronic, nonlinear optical, conducting, liquid crystal, fiber-forming and electroluminescence properties. [2][3][4][5][6][7][8][9][10][11][12] They are also studied in fundamental studies. 13 Unfortunately, polyazomethines have generally poor solubility and high melting temperature, which minimize their practical applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Çulhaoğlu¹,

Kaya²

2015

Polymer Korea

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In this study, we proposed to synthesize thermally stable, soluble and conjugated Schiff base polymer (SbP). For this reason, a specific molecule namely 4,4'-thiodiphenol which has sulfur and oxygen bridge in its structure was used to synthesize bi-functional monomers. Bi-functional amino and carbonyl monomers namely 4,4'-[thio-bis(4,1-phenyleneoxy)]dianiline (DIA) and 4,4'-[thiobis(4,1-phenyleneoxy)]dibenzaldehyde (DIB) were prepared from the elimination reaction of 4,4'-thiodiphenol with 4-iodonitrobenzene and 4-iodobenzaldehyde, respectively. The structures of products were confirmed by elemental analysis, FTIR, 1 H NMR and 13 C NMR techniques. The molecular weight distribution parameters of SbP were determined by size exclusion chromatography (SEC). The synthesized SbP was characterized by solubility tests, TG-DTA and DSC. Also, conductivity values of SbP and SbP-iodine complex were determined from their solid conductivity measurements. The conductivity measurements of doped and undoped SbP were carried out by Keithley 2400 electrometer at room temperature and atmospheric pressure, which were calculated via fourpoint probe technique. When iodine was used as a doping agent, the conductivity of SbP was observed to be increased. Optical band gap (E g ) of SbP was also calculated by using UV-Vis spectroscopy. It should be stressed that SbP was a semiconductor which had a potential in electronic and optoelectronic applications, with fairly low band gap. SbP was found to be thermally stable up to 300 o C. The char of SbP was observed 29.86% at 1000 o C.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Çulhaoğlu¹,

Kaya²

2015

Polymer Korea

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“…Imine-linked polymers (ILPs) are organic conjugated polymers that gained significant importance due to their vital applications in the fields of catalysis, sensing, gas sorption, electronic and optoelectronic devices, sensors and other more applications [1][2][3][4][5][6][7]. The multifunctional properties of ILPs are related to their selective structural design which, exhibit an extended conjugated backbone accessible for functionalization and free nitrogen sites available for protonation and metal ion-coordination [3,8,9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Electronic and pH-Sensing properties of Hydroxyl-Functionalized Imine-Linked Polymers via the UV-vis Absorption Spectra and the Density Functional Theory (DFT) Calculations

Aljaafreh

Altarawneh

Alomari

et al. 2017

J. Pure App. Chem. Res.

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In this report, a synergetic computational and experimental studies were demonstrated on examples of poly-imine polymers; P(PI-IPI) and P(PIOH-IPI) to explore the role of hydroxyl substituent on their sensing and electronic properties. The polymer P(PIOH-IPI) bearing the OH-group on the ortho-position to the imine-bond, while the structure of the polymer P(PI-IPI) reveal the imine-bond only. The sensing property of the polymers was investigated via the UV-vis absorption in different solvents, acidic and basic solutions. Both polymers have shown significant sensing behavior in the acidic medium, while unpronounced behavior was noticed in the case of the polymer P(PI-IPI) in basic medium. Upon the incorporation of the OH-group, the polymer P(PIOH-IPI) has indistinguishable sensing behavior, a similar blue-shift in the acidic and basic medium, which can be attributed to the presence and the position of OH-group. The optical band gap of the polymers was determined experimentally and theoretically from the UV-vis absorption spectra and DFT calculations in the DMSO solvent. Other factors that affect the band gap values such as the structural conformation and length of conjugation were explored theoretically. In general, as the length of the optimized chain increased, the spectrum is red-shifted and the band gap decreased, which is attributed to the possible loss of chain planarity and conjugation beyond the monomer structure. Interestingly, the UV-vis spectra of the monomer-optimized structures were in a good match with the experimental UV-vis spectra. However, the band gap difference can be attributed to the method of band gap determination.Key word: Sensing, Functionalization, conformation, Length of conjugation, DFT, UV-vis INTRODUCTIONImine-linked polymers (ILPs) are organic conjugated polymers that gained significant importance due to their vital applications in the fields of catalysis, sensing, gas sorption, electronic and optoelectronic devices, sensors and other more applications [1][2][3][4][5][6][7]. The multifunctional properties of ILPs are related to their selective structural design which, exhibit an extended conjugated backbone accessible for functionalization and free nitrogen sites available for protonation and metal ion-coordination [3,8,9].As example, ILPs-based polymers such as C3v-POF and Th-POF were synthesized as Cu-and Ir-coordinated polymers and used as catalysts in the hydrogenation and cyclopropanation reactions, while other ILPs were used as Suzuki coupling catalysts [9][10][11].

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“…complex forming ability and liquid crystalline behav ior of azomethine group containing polymer [9]. Thermotropic polyazomethine ether showed good second harmonic generation (SHG) for non linear optical (NLO) application [10].…”

Section: Introductionmentioning

confidence: 99%

Thermotropic poly(azomethine-urethane)s with non linear optical properties: Synthesis and characterization

2012

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Two series of the thermotropic main chain poly(azomethine-urethane)s were synthesized by the polyaddition of azadiol, 1,8 octandiol with methylene bis(phenyl isocyanate) (MDI) and tolylene 2,4 diiso cyanate (TDI) respectively. The mesomorphic properties and phase transition temperature of the polymers were characterized by differential scanning calorimetry and hot stage polarizing microscopy. These polymers showed nematic messophase. The non linear optical (NLO) activity of the polymers was also investigated.

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Synthesis and characterization of a novel polyazomethine ether for NLO application

Cited by 49 publications

References 3 publications

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Investigation of the Electronic and pH-Sensing properties of Hydroxyl-Functionalized Imine-Linked Polymers via the UV-vis Absorption Spectra and the Density Functional Theory (DFT) Calculations

Thermotropic poly(azomethine-urethane)s with non linear optical properties: Synthesis and characterization

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