Sensing and surface morphological properties of a poly[(9,9‐dioctylfluorenyl‐2,7‐diyl)‐<i>co</i>‐bithiophene] liquid‐crystalline polymer for optoelectronic applications

Gündüz, Bayram

doi:10.1002/app.41659

Cited by 8 publications

References 62 publications

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Synthesis, structures, and density functional theory computational study of thiophene‐containing and fluorodecorated imine‐linked polymers

Altarawneh

Jazzazi

Ababneh

et al. 2016

J of Applied Polymer Sci

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A new series of extended–conjugated and thermally stable thiophene‐containing imine‐linked polymers were synthesized via a Schiff‐base condensation reaction between aryl aldehydes and 2,6‐diaminopyridine building blocks. The backbones of the polymers were functionalized with phenyl, fluorosubstituted phenyl, thienyl, and pyridyl aromatic rings. The successful synthesis was confirmed with spectrochemical characterization techniques, including IR, 1H‐NMR, 13C‐NMR, and elemental analyses. The electronic properties of the polymers were investigated with ultraviolet–visible (UV–vis) absorption spectroscopy; the properties were collected experimentally and calculated with density functional theory (DFT) in the gas phase. The maximum absorption calculated from DFT was higher than the experimental values by about 60 nm; this was attributed to the absence of the solvent effect in the DFT case. The frontier molecular orbital ((HOMO) highest occupied molecular orbital and (LUMO) lowest unoccupied molecular orbital), optical band gap (Eg), and total energy (ET) values of the optimized structures were calculated. Apparently, there was a significant relation between the number of thiophene rings and the resulting Eg and ET values. As the number of thiophene rings in the polymer chain increased, Eg and ET decreased, and the thermal stability of the polymers increased. Eg and the absorption band edges were determined experimentally from the UV–vis and transmittance spectra, respectively. Poly(terthienyl–azomethine–pyridine–azomethine), with the highest thiophene content, had the lowest experimental and calculated Eg values (2.10 and 2.63 eV, respectively). In contrast, upon fluorination, poly[(2,5‐dithienyl–1,4‐difluorobenzene)–azomethine–pyridine–azomethine] exhibited the highest Eg (2.81 eV) and absorption band edges (2.94 eV), whereas the thermal stability decreased to 250 °C. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44331.

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Synthesis, structures, and density functional theory computational study of thiophene‐containing and fluorodecorated imine‐linked polymers

Altarawneh

Jazzazi

Ababneh

et al. 2016

J of Applied Polymer Sci

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Investigation of the spectral, optical and surface morphology properties of theN,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications

Gündüz

2015

Polym. Adv. Technol.

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Investigation of the spectral, optical and surface morphology properties of the N,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications † Bayram Gündüz* The spectral and optical properties of the solutions of the N,N′-Dipentyl-3,4,9,10-perylenedicarboximide (PTCDI-C5) small molecule for different molarities were investigated in detail. The significant spectral parameters such as molar/mass extinction coefficients, absorption coefficient, electric dipole line strength, and oscillator strength of the PTCDI-C5 molecule were calculated. The absorption bands of PTCDI-C5 show vibronic structures with seven peaks at 2.08, 2.35, 2.53, 2.70, 2.86, 3.32, and 3.86 eV, respectively. The electronic spectra of the PTCDI-C5 can be characterized by two basic regions as visible and Soret band. Effects of the molarities on the significant many optical parameters were investigated in detail. The direct and indirect allowed optical band gaps of the PTCDI-C5 decrease with increasing molarity. Then, surface morphology properties were investigated and calculated roughness parameters of the PTCDI-C5 film. Finally, we discussed for optoelectronic applications of these parameters, and this study was compared with the similar and related studies in the literature.

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Supramolecular Liquid Crystals Based on Cyclodextrins

Champagne

Kumar

Ling

2018

Environmental Chemistry for a Sustainable World

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Sensing and surface morphological properties of a poly[(9,9‐dioctylfluorenyl‐2,7‐diyl)‐co‐bithiophene] liquid‐crystalline polymer for optoelectronic applications

Cited by 8 publications

References 62 publications

Synthesis, structures, and density functional theory computational study of thiophene‐containing and fluorodecorated imine‐linked polymers

Synthesis, structures, and density functional theory computational study of thiophene‐containing and fluorodecorated imine‐linked polymers

Investigation of the spectral, optical and surface morphology properties of theN,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications

Supramolecular Liquid Crystals Based on Cyclodextrins

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