Influence of formic acid on optical and electrical properties of glycine crystal

Justin, P.; Anitha, K.

doi:10.1088/2053-1591/aa959e

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…Studies have shown that polymorphism can be controlled by adding additives to the crystallization medium. NaCl, different types of carboxylic acids and fatty acids, such as lauric and butyric acid, are some of the additives that have been investigated to date.…”

Section: Introductionsupporting

confidence: 74%

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An experimental investigation and kinetic‐modeling study of the phase transformation behavior of glycine in various carboxylic acids

Polat

Sayan

2019

Asia-Pacific J Chem Eng

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In this study, the phase transformation behavior from β-glycine (Gly) to α-Gly was examined in the presence of three different carboxylic acid additives (acetic, tartaric, and citric acid) at three different concentrations. Initially, the structure, morphology, shape parameters, surface functional groups, and elemental properties of the crystals prepared from the additive-containing and nonadditive media were investigated. The characterization results showed that when compared with the pure medium, both the duration of the phase transformation and physicochemical properties of the α-Gly crystals were altered in the presence of the three carboxylic acid additives studied. Subsequently, the experimental data obtained from the thermogravimetric analysis of the α-Gly samples obtained from the additive containing and nonadditive media were modeled using a simplified DAEM kinetic model. On the basis of the data obtained from the distributed activation energy model, the average activation energy for the Gly crystals obtained from the pure medium was calculated to be 90.8 kJ/mol. The value for the crystals obtained from the acetic acidcontaining medium was 104.0 higher than that found for the crystals from the pure medium and other two other additives studied. Besides kinetic analysis, thermogravimetric analysis/Fourier-transform infrared spectroscopy and elemental analysis confirmed that the carboxylic acid was adsorbed on the crystal's surface. The amount of acetic, tartaric, and citric acid adsorbed was 2.97, 2.38, and 1.72 mg/g, respectively.

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Section: Introductionsupporting

confidence: 74%

“…The β‐form is less stable under both reaction conditions and rarely exists. The α‐form can be easily formed, whereas the γ‐form can only be crystallized under special conditions . Studies have shown that polymorphism can be controlled by adding additives to the crystallization medium.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation and kinetic‐modeling study of the phase transformation behavior of glycine in various carboxylic acids

Polat

Sayan

2019

Asia-Pacific J Chem Eng

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“…α-Gly crystallizes in centrosymmetric crystal structure [space group P2 1 /n (14)]. In contrast, βand γ-Gly crystallize in non-centrosymmetric structure of monoclinic [sp.gr.…”

Section: Introductionmentioning

confidence: 99%

Croconic Acid Doped Glycine Single Crystals: Growth, Crystal Structure, UV-Vis, FTIR, Raman and Photoluminescence Spectroscopy

et al. 2022

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Glycine (Gly) single crystals doped with croconic acid (CA) were grown by evaporation from aqueous solutions. Depending on the weight ratio of Gly and CA in solutions, the crystals take on a plate or pyramidal shape. Both powder and single crystal XRD analyses indicate that the crystal lattices of plates (α-Gly:CA) and pyramides (γ-Gly:CA) correspond to the lattices of pure α-Gly and γ-Gly polymorphs, respectively. Raman and FTIR spectra of Gly:CA crystals are very close to the spectra of undoped crystals, but include bands associated with CA impurity. Analysis of UV-Vis absorption spectra indicates that doping does not remarkably change bandgap value Eg~5.2 eV but results in appearance of strong absorption bands in the transparency region of pure glycine crystals, which result from local electronic transitions. Incorporation of CA molecules in Gly creates strong green photoluminescence in a wide spectral range 1.6–3.6 eV. Comparison of the optical spectra of Gly:CA and previously studied TGS:CA crystals indicates that in both cases, the modifications of the optical spectra induced by CA doping are practically identical and are related to the interaction between CA molecules located in the pores of the host Gly crystals and neighboring Gly molecules.

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Enhanced piezoelectric, optical, mechanical, and laser damage threshold studies on creatinine doped glycine single crystals

Justin

Anitha

Ahamed

et al. 2019

J Mater Sci: Mater Electron

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Influence of formic acid on optical and electrical properties of glycine crystal

Cited by 6 publications

References 42 publications

An experimental investigation and kinetic‐modeling study of the phase transformation behavior of glycine in various carboxylic acids

An experimental investigation and kinetic‐modeling study of the phase transformation behavior of glycine in various carboxylic acids

Croconic Acid Doped Glycine Single Crystals: Growth, Crystal Structure, UV-Vis, FTIR, Raman and Photoluminescence Spectroscopy

Enhanced piezoelectric, optical, mechanical, and laser damage threshold studies on creatinine doped glycine single crystals

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