Synthesis, Physicochemical and Optical Characterization of Novel Fluorescing Complex: o-Phenylenediamine—Benzoin

Dwivedi, Y.; Kant, Shri; B., S.; N., R.

doi:10.1007/s10895-010-0808-9

Cited by 22 publications

(9 citation statements)

References 36 publications

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“…The melting points of starting materials are in agreementwith their literature value [5]. The phase diagram was established by the thaw melt method where binary mixtures covering the entire range of compositions were prepared by solid-state synthesis [6]. Toshniwal melting point apparatus, attached with a thermometer which could read up to ±0.5 o C with accuracy was used for melting point determination.…”

Section: Methodssupporting

confidence: 55%

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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Section: Methodssupporting

confidence: 55%

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 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 values of heat of fusion of the pure components, the eutectics and the IMCs were determined [18] by the differential scanning calorimetry (DSC) method using (Mettler DSC-4000 System). Indium and zinc samples were used to calibrate the DSC unit.…”

Section: Enthalpy Of Fusionmentioning

confidence: 99%

Green synthesis, characterization and optical properties of eutectics and 1:1 intermolecular compounds: N,N-dimethylaminobenzaldehyde–anthranilic acid and 2-(4-(dimethylamino)benzylideneamino)benzoic acid–p-nitroaniline systems

2019

Bull Mater Sci

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Phase diagrams of N ,N-dimethylaminobenzaldehyde (DMAB)-anthranilic acid (AA) and 2-(4-(dimethylamino)benzylideneamino)benzoic acid (DMABAB)p-nitroaniline (PNA) systems, determined by the thaw-melt method, give two eutectics and a 1:1 intermolecular compound (IMC) in each case. Appropriate amounts (10 g) of each of the eutectics and the IMCs were prepared by a green synthetic method involving a solid state reaction without any solvent. These materials were characterized by X-ray diffraction, thermal and spectral methods and the optical properties of the pure components and the IMCs were studied. While negative values of heat of mixing in the case of a DMAB-AA system suggest clustering of molecules in both eutectic melts, those of positive value in E 1 and negative value in E 2 of the DMABAB-PNA system indicate the formation of a quasi-eutectic structure in E 1 melt and clustering of molecules in E 2 melt. The IMC of DMAB-AA system shows strong dual emission with two λ max one at 380 nm and the second at 450 nm with a total quantum efficiency of 0.49. The IMC of DMABAB-PNA system also shows a similar observation with two λ max one at 390 nm and second at 435 nm with a total quantum efficiency of 0.31.

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Synthesis, Physicochemical and Optical Characterization of Novel Fluorescing Complex: o-Phenylenediamine—Benzoin

Cited by 22 publications

References 36 publications

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

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

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

Green synthesis, characterization and optical properties of eutectics and 1:1 intermolecular compounds: N,N-dimethylaminobenzaldehyde–anthranilic acid and 2-(4-(dimethylamino)benzylideneamino)benzoic acid–p-nitroaniline systems

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Synthesis, Physicochemical and Optical Characterization of Novel Fluorescing Complex: o-Phenylenediamine—Benzoin

Cited by 22 publications

References 36 publications

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

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

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

Green synthesis, characterization and optical properties of eutectics and 1:1 intermolecular compounds: N,N-dimethylaminobenzaldehyde–anthranilic acid and 2-(4-(dimethylamino)benzylideneamino)benzoic acid–p-nitroaniline systems

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