Dielectric and FTIR studies on the hydrogen bonded binary system of ester and alcohol

Yaseen, S. A.; Undre, P. B.; Saif, F. A.; Patil, S. S.; Khirade, P. W.

doi:10.1080/00150193.2017.1360685

Cited by 17 publications

(4 citation statements)

References 31 publications

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“…This shift can be attributed to weak hydrogen bonding between the sulfoxide group and hydroxyl group 22 . Previous literature reports have also observed a characteristic hydrogen bond peak around 3360 cm −1 between n-butanol and carbonyl groups 23 . Based on these findings, we analyzed the hydrogen bond characteristic peaks in modified PBFDO solution through fitting processing (see Fig.…”

Section: Resultsmentioning

confidence: 70%

Highly conductive polymer electrodes for polymer light-emitting diodes

Xu,

Du,

Peng

et al. 2024

npj Flex Electron

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Organic light-emitting diodes (OLEDs) offer the advantage of flexibility; however, the use of traditional transparent anode ITO limits further extension of their flexible characteristics. In this study, we propose employing an polymer polybenzodifuranedione (PBFDO) as a flexible transparent anode instead of the rigid ITO. To address the issue encountered during the PBFDO solution spin-coating process, we introduced n-butanol into the PBFDO conductive solution to reduce its viscosity and freezing point by modulating intermolecular hydrogen bonding interactions. Consequently, high-quality PBFDO films with high conductivity, superior transmittance, and low surface roughness were successfully obtained via spin-coating. Moreover, due to its proper work function, regular molecular stacking, and low refractive index properties, PBFDO electrode facilitate efficient carrier injection and transport as well as photon extraction. The resulting device utilizing a PBFDO anode combined with Super Yellow as the light-emitting layer exhibited excellent performance characteristics including a normal threshold voltage of 2.6 V and a maximum luminous efficiency of 12.8 cd A−1 comparable to that device based on the ITO electrode. Furthermore, flexible device also achieved satisfactory performance (7.7 cd A−1) when using the PEN substrate.

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Section: Resultsmentioning

confidence: 70%

Highly conductive polymer electrodes for polymer light-emitting diodes

Xu,

Du,

Peng

et al. 2024

npj Flex Electron

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“…This higher relaxation time of MCS is due to the formation of multimers. Yaseen et al, 30 reported that the co-operative process of multimers O−H...O linkage give rise to high relaxation time. So, the relaxation time can be used to investigate the size of the rotating molecular unit and not for identifying the specific H-bond interaction sites of the solution constituents.…”

Section: Resultsmentioning

confidence: 99%

Time Domain Reflectometric Studies on Methylcellosolve – Acetylacetone Binary Solutions

et al. 2021

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Time Domain Reflectometric studies has been applied on the binary solutions of methylcellosolve (MCS) with acetylacetone (ACACT) in the entire concentration range at 298 K in the frequency range of 10 MHz – 32 GHz. The values of relaxation time (τ), effective Kirkwood correlation factor (geff ), corrective Kirkwood correlation factor (gf ) and excess permittivity (εE ) have been calculated. The relaxation time of MCS slowly decreases with increase in ACACT concentration suggesting that the size of the heteroassociated rotating unit decreases. The rate at which τ value decreases is more in MCS rich solutions which means that the formation of heteromolecular H – bonds dominantly occur in MCS rich solutions. Parallel orientation among the dipoles occur as suggested by the g^eff values which are greater than unity in all the solutions. The excess permittivity ε^E values calculated using mole and volume fractions qualitatively exhibit the same deviation from ideal behaviour.

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“…The absorption peaks that experienced changes in intensity and shift were the absorption peaks of the proton donor and acceptor groups of hydrogen bonds in the molecules of atorvastatin calcium and dipicolinic acid. Based on the results of the FTIR analysis it has been indicated that the atorvastatin calcium and dipicolinic acid molecules in the solids have formed intermolecular interactions, especially hydrogen bonds (Yaseen et al, 2017;Vemuri & Lankalapalli, 2021).…”

Section: Dsc Thermogrammentioning

confidence: 99%

Preparation of Atorvastatin Calcium-Dipicolinic Acid Multicomponent Solids by Liquid-Assisted Grinding Method to Increase Solubility

Wicaksono

Tsaniyah

Wisudyaningsih

et al. 2022

molekul

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Atorvastatin calcium is a cholesterol-lowering drug that is very potent but difficult to dissolve in water, so its bioavailability is low. In this study, atorvastatin calcium-dipicolinic acid multicomponent solids were prepared using the liquid-assisted grinding method to improve atorvastatin calcium's solubility. Characterization of multicomponent solids was carried out using powder x-ray diffraction (PXRD), differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Solubility test was carried out by shaking method using distilled water media. The results showed that the particles of atorvastatin calcium - dipicolinic acid multicomponent solids had an irregular shape with rough and porous surface topography. The multicomponent solids have a diffractogram with specific peaks of 2θ at 8.8, 9.9, 11.5, 16.7, 19.1, 21.2, 22.4, 23.4, and 27.7°. The DSC thermogram of multicomponent solids showed a sharp endothermic peak at 181.9 °C (∆H=17.69 J/g), indicating its melting point. The FTIR spectra of atorvastatin calcium-dipicolinic acid multicomponent solids indicated an intermolecular interaction that was thought to be a hydrogen bond between the molecules of atorvastatin calcium and dipicolinic acid. The results of the solubility test showed that the atorvastatin calcium-dipicolinic acid multicomponent solids had a significantly increased solubility (p<0.05) compared to the solubility of pure atorvastatin calcium.

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Dielectric and FTIR studies on the hydrogen bonded binary system of ester and alcohol

Cited by 17 publications

References 31 publications

Highly conductive polymer electrodes for polymer light-emitting diodes

Highly conductive polymer electrodes for polymer light-emitting diodes

Time Domain Reflectometric Studies on Methylcellosolve – Acetylacetone Binary Solutions

Preparation of Atorvastatin Calcium-Dipicolinic Acid Multicomponent Solids by Liquid-Assisted Grinding Method to Increase Solubility

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