Spectroscopic and Physicochemical Investigations of Azomethines with Triphenylamine Core towards Optoelectronics

Amin, Muhammad Faisal; Gnida, Paweł; Kotowicz, Sonia; Małecki, Jan Grzegorz; Siwy, Mariola; Nitschke, Paweł; Schab‐Balcerzak, Ewa

doi:10.3390/ma15207197

Cited by 4 publications

(2 citation statements)

References 49 publications

(61 reference statements)

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“…Various peaks in range of (-OCH3) was established by the distinctive singlet signal at 3.661 ppm [68]. Our results coincide with previous research, where 3.6 ppm singlet has been reported to be a characteristic peak in 1 HNMR biodiesel [69,70]. Furthermore, peaks ranging from 2.254 to 2.426 ppm of α-methylene proton (-CH 2 ) have been determined in triplets.…”

Section: Process Parametric Optimization Of Transesterificationsupporting

confidence: 90%

“…The rapid depletion of oil reserves, petroleum price hikes, and the adversarial effects of fossil fuel resources on the environment are the key factors that lead to the pursuit of a replacement energy source. Biofuels, particularly biodiesel, are an attractive renewable source of energy that is produced from biomass using a different extraction or conversion process [1,2]. Biodiesel, owing to its nontoxic nature, with lower levels of carbon monoxide, sulfur dioxide, and particulate matter pollution, presents a viable substitute for petroleum diesel [3].…”

Section: Introductionmentioning

confidence: 99%

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Cleaner Biofuel Production via Process Parametric Optimization of Nonedible Feedstock in a Membrane Reactor Using a Titania-Based Heterogeneous Nanocatalyst: An Aid to Sustainable Energy Development

Ameen,

Zafar,

Ahmad

et al. 2023

Membranes

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Membrane technology has been embraced as a feasible and suitable substitute for conventional time- and energy-intensive biodiesel synthesis processes. It is ecofriendly, easier to run and regulate, and requires less energy than conventional approaches, with excellent stability. Therefore, the present study involved the synthesis and application of a highly reactive and recyclable Titania-based heterogeneous nanocatalyst (TiO2) for biodiesel production from nonedible Azadhiracta indica seed oil via a membrane reactor, since Azadhiracta indica is easily and widely accessible and has a rich oil content (39% w/w). The high free fatty acids content (6.52 mg/g KOH) of the nonedible oil was decreased to less than 1% via two-step esterification. Following the esterification, transesterification was performed using a heterogeneous TiO2 nanocatalyst under optimum conditions, such as a 9:1 methanol–oil molar ratio, 90 °C reaction temperature, 2 wt.% catalyst loading, and an agitation rate of 600 rpm, and the biodiesel yield was optimized through response surface methodology (RSM). Azadhiracta indica seed oil contains 68.98% unsaturated (61.01% oleic acid, 8.97% linoleic acid) and 31.02% saturated fatty acids (15.91% palmitic acid, 15.11% stearic acid). These fatty acids transformed into respective methyl esters, with a total yield up to 95% achieved. The biodiesel was analyzed via advanced characterization techniques like gas chromatography–mass spectrometry (GC-MS), Fourier transform infrared spectroscopy (FT-IR), and nuclear magnetic resonance (NMR), whereas the catalyst was characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FT-IR). Due to its physicochemical properties, Azadirachta indica seed oil is a highly recommended feedstock for biodiesel production. Moreover, it is concluded that the Titania-based heterogeneous nanocatalyst (TiO2) is effective for high-quality liquid fuel synthesis from nonedible Azadirachta indica seed oil in a membrane reactor, which could be an optional green route to cleaner production of bioenergy, eventually leading to sustenance, robustness, and resilience that will aid in developing a holistic framework for integrated waste management.

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Section: Process Parametric Optimization Of Transesterificationsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Cleaner Biofuel Production via Process Parametric Optimization of Nonedible Feedstock in a Membrane Reactor Using a Titania-Based Heterogeneous Nanocatalyst: An Aid to Sustainable Energy Development

Ameen,

Zafar,

Ahmad

et al. 2023

Membranes

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Solvent-free mechanosynthesis of Schiff bases derived from thiadiazole with potential application in sensing ionic species and NLO applications

Vite-Morales,

Amado-Briseño,

Vázquez-García

et al. 2024

Chemical Physics Impact

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Photophysical Investigations of the Organic Compounds Synthesised from Waste Poly(Ethylene Terephthalate)

Kotowicz,

Korzec,

Kapkowski

et al. 2024

Ecological Chemistry and Engineering S

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This paper presents the photophysical investigations of two organic compounds synthesised directly by the aminolysis depolymerisation of the waste poly(ethylene terephthalate) (rPET) with aromatic amines, i.e., aniline and 3-amino-N-hexyl-1,8-naphthalimide without use of a catalyst. The chemical structure was confirmed by 1H-NMR and 13C-NMR, as well as FT-IR. The thermal, electrochemical and optical studies of the obtained derivatives were performed. The presented compounds were thermally stable up to 360 °C, and the glass transition temperature (T g) occurred for the compound with the 1,8-naphthalimide units. The electrochemical investigations of the synthesised compounds have revealed one oxidation process and two reduction processes for the compound with the 1,8-naphthalimide fragments. The tested derivatives were characterised by a low-lying highest occupied molecular orbital (HOMO) level (below –6.09 eV) and an energy-band gap (E g) below 3.10 eV. The obtained molecules were absorbed in the range of 204 nm - 445 nm and emitted light from a purple to a green spectral region deepened on the used solvent with low quantum yields. The blends with poly(3-hexylthiophene-2,5-diyl) (P3HT), which is used as a donor in the bulk heterojunction solar cells (BHJ), and amide derivative with 1,8-naphthalimide fragments were made, and the emission quenching of poly(3-hexylthiophene-2,5-diyl) (P3HT) was recorded. The presented results of the photophysical investigations have opened new possibilities for obtaining functional materials from recycled poly(ethylene terephthalate) (rPET).

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Spectroscopic and Physicochemical Investigations of Azomethines with Triphenylamine Core towards Optoelectronics

Cited by 4 publications

References 49 publications

Cleaner Biofuel Production via Process Parametric Optimization of Nonedible Feedstock in a Membrane Reactor Using a Titania-Based Heterogeneous Nanocatalyst: An Aid to Sustainable Energy Development

Cleaner Biofuel Production via Process Parametric Optimization of Nonedible Feedstock in a Membrane Reactor Using a Titania-Based Heterogeneous Nanocatalyst: An Aid to Sustainable Energy Development

Solvent-free mechanosynthesis of Schiff bases derived from thiadiazole with potential application in sensing ionic species and NLO applications

Photophysical Investigations of the Organic Compounds Synthesised from Waste Poly(Ethylene Terephthalate)

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