Synthesis, characterization, crystal structure and liquid crystal studies of some symmetric naphthalene derivative molecules

Srinivasa, H. T.; Palakshamurthy, B. S.; Devarajegowda, H. C.; Hariprasad, S. A.

doi:10.1016/j.molstruc.2018.07.036

Cited by 18 publications

(5 citation statements)

References 30 publications

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“…Although LCPs were recognized for their rigidity and linearity, which endowed them with exceptional high temperature resistance, ″I‐type″ LCPs (eg, T K‐N of LCP‐NDA0 > 410 °C) were challenging to process. The NDA has a kinked structure resembling a crankshaft to disrupt the linearity of LCPs, resulting in a decrease in T K‐N; [ 19 ] However, the incorporation of NDA did not change the thermal stability of LCP‐NDA6. Considering the wide processing window and excellent thermomechanical properties of LCP‐NDA6, it could be expected to be a promising candidate for triboelectric material of TENG in extreme environment.…”

Section: Resultsmentioning

confidence: 99%

High Performance and Reprocessable In Situ Generated Nanofiber Reinforced Composites Based on Liquid Crystal Polyarylate

Luo,

Peng,

Zheng

et al. 2024

Advanced Materials

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Polymers are playing important roles in the rapid development of triboelectric nanogenerators (TENGs). However, most polymers cannot meet the high requirements of thermomechanical performance. Thus, various polymeric composites have been developed for triboelectric layer. These composites are hardly recycled since their reinforcements are unevenly distributed after reprocessing, which limits the sustainable development of TENGs. To solve above challenges, in situ generated nanofiber reinforced composites (NFRCs) based on single‐component liquid crystal polyarylate (LCP) are designed and prepared via a one‐step polycondensation. Nonlinear naphthalene (NDA) widened the processing window of LCP without destabilizing liquid crystal phase. The NDA‐rich domains act as matrix while the NDA‐poor domains with higher rigidity form oriented nanofibers to achieve self‐reinforcement. The resultant NFRCs possess high glass transition temperature (Tg > 220 °C) and storage modulus (E’ = 0.1 GPa at 350 °C), which are far beyond existing triboelectric polymers, typically Tg < 110 °C and E’ < 0.1 MPa (flowable) at 350 °C. Furthermore, NFRC based TENG exhibits superior electrical output performance and retention rate (> 90%) after reprocessing. Overall, this work offers a new design principle to prepare self‐reinforced composites, which paves a way to explore high performance materials.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 99%

High Performance and Reprocessable In Situ Generated Nanofiber Reinforced Composites Based on Liquid Crystal Polyarylate

Luo,

Peng,

Zheng

et al. 2024

Advanced Materials

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“…Our team is studying new bent-core liquid crystals with naphthalene rings as a rigid core (Srinivasa et al, 2018) and, as part of that work, we have performed a simple coupling reaction between 1,2-dihydroxynaphthalene and 3-benzyloxybenzoic acid to construct the title molecule. It is a benttype non-liquid crystal material, possibly due to the absence of alkyl chains/polar moiety at the ends of the molecule.…”

Section: Chemical Contextmentioning

confidence: 99%

Synthesis, crystal structure and Hirshfeld surface analysis of naphthalene-2,3-diyl bis(3-benzyloxy)benzoate

Anil Kumar,

Selvanandan,

Srinivasa

et al. 2023

Acta Cryst E

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In the title compound, C38H28O6, the dihedral angles between the naphthalene ring system and its pendant benzyloxy rings A and B are 88.05 (7) and 80.84 (7)°, respectively. The dihedral angles between the A and B rings and their attached phenyl rings are 49.15 (8) and 80.78 (8)°, respectively. In the extended structure, the molecules are linked by weak C—H...O and C—H...π hydrogen bonds, and π–π stacking interactions, which variously generate C(11) chains and R 2 2(12) loops as part of a three-dimensional network. The Hirshfeld surface [fingerprint contributions = H...H (42.3%), C...H/H...C (40.3%) and O...H/H...O (15.7%)] and intermolecular interaction energies are reported, with dispersion (E dis = −428.6 kJ mol−1) being the major contributor.

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“…Naphthalene comprises a fused pair of benzene rings and possesses central rigid structure because of its aromaticity 1,2 . At the present time, it is known as a simple polycyclic aromatic hydrocarbon and has also been defined as a volatile organic compound (VOC) by The U.S. Environmental Protection Agency (EPA) 3 .…”

Section: Introductionmentioning

confidence: 99%

Applicability of purge and trap gas chromatography‐ mass spectrometry method for sensitive analytical detection of naphthalene and its derivatives in waters

Güzel

Canlı

2020

J Mass Spectrom

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Nowadays, a wide variety of chemicals has emerged because of increasing industrial and human activities. Thus, environmental chemistry laboratories performing analytical measurements need rapid and sensitive methods more than ever to get reliable quantitative data. For this purpose, a purge and trap gas chromatography–mass spectrometry (GC‐MS) method was developed and validated for the rapid, simple, and sensitive determination of the presence of naphthalene and its derivatives in waters. The method validation was based on specificity, calibration curve linearity, limit of detection (LOD) and limit of quantification (LOQ), accuracy (recovery), precision, matrix effects (MEs), and measurement uncertainty. This method showed excellent linearity from 1.00 to 40.00 μg/L except naphthalene (0.50–40.00 μg/L) because the correlation coefficients were higher than 0.997 for all analytes. The LOQ values varied from 0.312 to 0.746 μg/L, and the LOD values changed from 0.094 to 0.224 μg/L with relative standard deviations (RSDs) for all compounds below 10% (3.12–7.46), respectively. Recoveries ranged from 81.9% to 95.6%, and repeatability and reproducibility (in terms of RSD for six measurements) were lower than 10% in all cases. F test was subjected on the related data at 95% confidence level, and no statistically significant difference was observed. There was no critical ME (recovery varied from 80% to 110% in all matrices). In measurement uncertainty, the expanded uncertainties of each analyte were changed in the range of 0.39–0.52 μg/L, and the calibration curve and repeatability had dominant effects on the combined uncertainty. The application to real samples was successfully assessed by the developed method. These results indicate that the developed method is suitable for the determination of naphthalene and its derivatives in waters.

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Synthesis, characterization, crystal structure and liquid crystal studies of some symmetric naphthalene derivative molecules

Cited by 18 publications

References 30 publications

High Performance and Reprocessable In Situ Generated Nanofiber Reinforced Composites Based on Liquid Crystal Polyarylate

High Performance and Reprocessable In Situ Generated Nanofiber Reinforced Composites Based on Liquid Crystal Polyarylate

Synthesis, crystal structure and Hirshfeld surface analysis of naphthalene-2,3-diyl bis(3-benzyloxy)benzoate

Applicability of purge and trap gas chromatography‐ mass spectrometry method for sensitive analytical detection of naphthalene and its derivatives in waters

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