Solid state synthesis of novel charge transfer complex and studies of its crystal structure and optical properties

Neupane, Umesh; Rai, Rajani

doi:10.1016/j.jssc.2018.08.029

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…On the other hand, S 3 generators are more sensitive to power reflections, and their efficiency is lower than that of magnetrons. The full utilization of the S 3 advantages, especially the frequency variation during the process, requires higher levels of system design and process control [15][16][17].…”

Section: Overview Of the Microwave Frequency Effectmentioning

confidence: 99%

Current Trends in the Development of Microwave Reactors for the Synthesis of Nanomaterials in Laboratories and Industries: A Review

et al. 2018

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Microwave energy has been in use for many applications for more than 50 years, from communication, food processing, and wood drying to chemical reactions and medical therapy. The areas, where microwave technology is applied, include drying, calcination, decomposition, powder synthesis, sintering, and chemical process control. Before the year 2000, microwaves were used to produce ceramics, semiconductors, polymers, and inorganic materials; in next years, some new attempts were made as well. Nowadays, it has been found that microwave sintering can also be applied to sintered powder and ceramics and is more effective than conventional sintering. Particularly interesting is its use for the synthesis of nanomaterials. This review identifies the main sources of microwave generation, the delivery mechanisms of microwave energy, and the typical designs and configurations of microwave devices, as well as the measurement and construction material problems related to microwave technology. We focus our attention on the configurations, materials, optimized geometries, and solvents used for microwave devices, providing examples of products, especially nanoparticles and other nanomaterials. The identified microwave devices are divided into four groups, depending on the scale, the maximum pressure developed, the highest temperature for sintering, or other special multi-functions. The challenges of using microwave energy for the synthesis of nanopowders have been identified as well. The desirable characteristics of microwave reactors in the synthesis of nanostructures, as well as their superiority over conventional synthetic methods, have been presented. We have also provided a review of the commercial and self-designed microwave reactors, digestors, and sintering furnaces for technology for synthesis of nanomaterials and other industries.

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Section: Overview Of the Microwave Frequency Effectmentioning

confidence: 99%

Current Trends in the Development of Microwave Reactors for the Synthesis of Nanomaterials in Laboratories and Industries: A Review

et al. 2018

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“…The finding is clearly apparent from Table . The observed large shifting explains that when an electron-donating group (amino group) and an electron accepting group (carbonyl group) combines either directly or through a bridge of conjugated double bonds, the migration of electrons is possible from the former to the latter, and subsequently, the complex gives rise to a special absorption band totally different from the parent components. − The variation in the absorption maxima and the fluorescence have been plotted in terms of Lippert–Mataga solvent polarity parameter (Δ f ) which is a function of the dielectric constant (ε) and refractive index (η) of the solvents. , where …”

Section: Resultsmentioning

confidence: 99%

Forecast of Phase Diagram for the Synthesis of a Complex for the Detection of Cr⁶⁺ Ions

et al. 2022

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A new organic complex (ANNBA) was synthesized using the solvent-free, solid-state reaction involving anthranilamide (AN)−m-nitrobenzoic acid (NBA). The established phase diagram specifies the formation of a complex in a 1:1 stoichiometric ratio which melts congruently at 142 °C. The diagram also infers the formation of two eutectics, E 1 and E 2 , on either side of the complex with their respective melting at 118 and 106 °C. The stability and novelty of the synthesized complex was confirmed by differential scanning calorimetry, powder Xray diffraction, and spectroscopic FTIR, 1 H, and 13 C NMR studies. The significant thermodynamic parameters such as the heat of mixing, the entropy of fusion, the roughness parameter, the interfacial energy, and excess thermodynamic functions have been studied. The novel complex (ANNBA) material displayed intense fluorescent emission as compared to the parent and the other well-known fluorescent organic material "pyrene." The influence of solvent's polarity on the absorption and emission of the complex has been studied in different solvents. Herein, we have displayed remarkable affinity of the complex toward hexavalent chromium ions in water, affecting its fluorescent property. We have deployed the synthesized complex as a turn-off fluorescent sensor to detect the most hazardous hexavalent chromium ions in water for the first time.

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“…The study of phase diagrams using solid-liquid equilibrium (SLE) data of an organic system is of great technical importance for the development, design, and operation of novel intermolecular compounds with promising properties [1][2]. The equilibrium data provides the details of phases that are in equilibrium from which various physicochemical properties could be investigated as well as their crystallization and separation processes [3][4]. The phase diagram also provides the thermodynamic aspects of different components like eutectic, peritectic, monotectic, etc, and could provide the physicochemical information about these components.…”

Section: Introductionmentioning

confidence: 99%

Solid-Liquid Equilibrium Study for Binary System Forming Intermolecular Compound: Phase Diagram, Thermal, Physicochemical and Powder XRD study

Sharma¹,

Ghimire

Neupane

2022

J. Nepal Chem. Soc.

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The phase diagram study of the binary organic system has been investigated by the thaw melt method using 4-hydroxy- 3 methoxybenzaldehyde (HMB) and 4-nitroaniline (NA). The temperature-composition plot showed that the intermolecular compound (IMC) has formed at 1:1 molar ratio with two eutectics on either side of IMC. The melting points of eutectics and IMC along with parents are verified by the DSC method. The different phases of the systems which are in equilibrium and their physicochemical properties are estimated using the enthalpy of fusion values obtained from DSC. The higher melting temperature of IMC suggested the formation of Schiff base during homogenization process. The new and moderately sharp Bragg’s peaks at specific 2θ values found in the diffractogram of IMC revealed the novelty and crystalline nature of IMC while repeated peaks in the diffractogram of eutectics suggest the mechanical mixture of eutectics

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Solid state synthesis of novel charge transfer complex and studies of its crystal structure and optical properties

Cited by 7 publications

References 40 publications

Current Trends in the Development of Microwave Reactors for the Synthesis of Nanomaterials in Laboratories and Industries: A Review

Current Trends in the Development of Microwave Reactors for the Synthesis of Nanomaterials in Laboratories and Industries: A Review

Forecast of Phase Diagram for the Synthesis of a Complex for the Detection of Cr⁶⁺ Ions

Solid-Liquid Equilibrium Study for Binary System Forming Intermolecular Compound: Phase Diagram, Thermal, Physicochemical and Powder XRD study

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Solid state synthesis of novel charge transfer complex and studies of its crystal structure and optical properties

Cited by 7 publications

References 40 publications

Current Trends in the Development of Microwave Reactors for the Synthesis of Nanomaterials in Laboratories and Industries: A Review

Current Trends in the Development of Microwave Reactors for the Synthesis of Nanomaterials in Laboratories and Industries: A Review

Forecast of Phase Diagram for the Synthesis of a Complex for the Detection of Cr6+ Ions

Solid-Liquid Equilibrium Study for Binary System Forming Intermolecular Compound: Phase Diagram, Thermal, Physicochemical and Powder XRD study

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Forecast of Phase Diagram for the Synthesis of a Complex for the Detection of Cr⁶⁺ Ions