Vibrational, calorimetric and nonlinear optical studies of melaminium-bis(trichloroacetate) monohydrate molecular–ionic crystal

Debrus, S.; Marchewka, M.K.; Drozd, M.; Ratajczak, H.

doi:10.1016/j.optmat.2006.04.004

Cited by 33 publications

(8 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The difference of 68 cm −1 is known as blue shift. Similar shift is observed in Debrus et al [21]. The strong intense peak at 3234 cm −1 and medium peak at 3041 cm −1 are due to the formations of hydrogen bonding between NH 2 /NH groups.…”

Section: Characterizationsupporting

confidence: 88%

Spectral and Thermal Degradation of Melamine Cyanurate

Sangeetha¹,

Kanagathara

Sumathi

et al. 2013

Journal of Materials

View full text Add to dashboard Cite

Melamine cyanurate, an organic crystalline complex was, synthesized by evaporation of an aqueous solution containing equimolar quantities of melamine and cyanuric acid. The synthesized compound has been subjected to various characterizations like Powder XRD, FT-IR, TG-DTG, SEM, and SHG. The presence of sharp diffraction peaks in the XRD confirms that the products are highly crystalline. The average particle size was calculated using the Debye-Scherrer formula, and it was found to be 3.067 m. Thermal behavior of the grown crystal has been studied by TG-DTG analysis. From TG-DTG, it is found that the title crystal possesses good thermal stability. The activation energy was calculated using the Broido, Coats-Redfern, and Horowitz-Metzger methods. A sharp peak exothermic peak at 405.40 ∘ C was assigned as the melting point of the title material. SEM reveals the morphology of the synthesized salt. No detectable signal was observed during the Kurtz-Perry technique.

show abstract

Section: Characterizationsupporting

confidence: 88%

Spectral and Thermal Degradation of Melamine Cyanurate

Sangeetha¹,

Kanagathara

Sumathi

et al. 2013

Journal of Materials

View full text Add to dashboard Cite

show abstract

“…For applications of melamine, see: Rima et al (2008); Cook et al (2005); Ramos Silva et al (2008). For related structures, see: Debrus et al (2007); Zhao & Shi (2010); Marchewka & Pietraszko (2003); Marchewka (2002). For applications of hydrogen bonding, see: Aghabozorg et al (2008).…”

Section: Related Literaturementioning

confidence: 99%

“…Melamine can be a proton acceptor and will form 2,4,6-triamino-1,3,5-triazine-1-ium (Ramos Silva et al, 2008). Recently many melaminium complexes in crystalline form has been reported, such as melaminium-bis(trichloroacetate) monohydrate (Debrus et al, 2007), melaminium iodide monohydrate (Zhao & Shi, 2010) and melaminium citrate (Marchewka & Pietraszko, 2003). Melaminium salt crystals have shown interesting properties like nonlinear optical behaviour (Marchewka, 2002).…”

Section: S1 Commentmentioning

confidence: 99%

Melaminium nitrate–melamine–water (1/1/1)

et al. 2010

View full text Add to dashboard Cite

In the crystal structure of the title salt, C3H7N6 +·NO3 −·C3H6N6·H2O, the asymmetric unit consists of two neutral melamine (1,3,5-triazine-2,4,6-triamine) molecules, two melaminium cations, two nitrate anions and two solvent water molecules. One of the nitrate anions is disordered over two sets of positions, with a refined occupancy ratio of 0.909 (3):0.091 (3). The cations and neutral molecules are approximately planar, with maximum deviations of 0.018 (2), 0.024 (2), 0.019 (2) and 0.007 (2) Å for each, respectively. In the crystal structure, melaminium cations and netural melamine molecules self-assemble via N—H⋯N hydrogen bonds to form a supramolecular hexagonal-shaped motif. In addition, the nitrate anions and water molecules are connected by N—H⋯O hydrogen bonds to form a three-dimensional network.

show abstract

“…The crystal structure of MTCA was reported by Perpetuo and Janczak [10]. Vibrational and other properties of MTCA were recently reported by Debrus et al [5] and Kanagathara et al [11]. Although many reports available for the thermal behavior of melamine and its salts, not much research has been carried out on the kinetic analysis of the thermal decomposition of MTCA.…”

Section: * Corresponding Authormentioning

confidence: 97%

Kinetics and Mechanical Studies of Melaminium bis(trichloroacetate) dihydrate

et al. 2014

Self Cite

View full text Add to dashboard Cite

The thermal decomposition kinetics of melaminium bis(trichloroacetate) dihydrate (MTCA) has been studied by thermogravimetry and derivative thermogravimetry techniques using non-isothermal experiments at three different heating rates 10, 15, and 20Non-isothermal studies of MTCA revealed that the decomposition occurs in three stages involving dehydration and decomposition. The apparent activation energy (Ea) and the pre-exponential factor (ln A) of each stage of thermal decomposition at various linear heating rates are calculated using FlynnWall, Friedman, Kissinger, and KimPark method. A signicant variation of eective activation energy (Ea) with conversion (α) indicates that the process is kinetically complex. The linear relationship between the A and Ea values is well established (compensation eect). Isothermal kinetics of thermal decomposition of MTCA was found to obey AvramiErofeev's (A4) and power law (P3) equations. In addition to the above, mechanical properties have been estimated by Vicker's microhardness test for the grown crystal.

show abstract

Vibrational, calorimetric and nonlinear optical studies of melaminium-bis(trichloroacetate) monohydrate molecular–ionic crystal

Cited by 33 publications

References 27 publications

Spectral and Thermal Degradation of Melamine Cyanurate

Spectral and Thermal Degradation of Melamine Cyanurate

Melaminium nitrate–melamine–water (1/1/1)

Kinetics and Mechanical Studies of Melaminium bis(trichloroacetate) dihydrate

Contact Info

Product

Resources

About