Synthesis and characterization, electrical and gas sensing properties of N,N′-bis(salicylidene)-1,2-phenylendiamine substituted novel mono and ball-type metallo phthalocyanines

Yazicı, Ayşegül; Sarıçiçek, Bakiye; Altındal, Ahmet; Salih, Bekir; Bekâroĝlu, Özer

doi:10.1016/j.ica.2015.01.027

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…We also noticed that ε’ increases with the rise of temperature reaching a maximum of 391 K (referred to as ferroelectric to paraelectric phase transition temperature Tc) and then increases with the rise of temperature. This increment may be attributed to the space charge polarization and conduction …”

Section: Resultsmentioning

confidence: 99%

Ferroelectric and electrical properties of LiNaWO₄ compound

Krimi

Karoui

Zghal

et al. 2019

Applied Organom Chemis

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The aim of this work is to elaborate the LiNaWO4 compound, using the solid state method, then to characterize it using an XR study which confirms that it crystallizes in the orthorhombic system with P222 as space group and with the lattice parameters a = 12.82 Å, b = 17.49 Å, c = 7.25 Å and α = β = γ = 90°. The differential scanning calorimetry (DSC) shows two endothermic peaks at T1 = 388 K and T2 = 500 K. The first peak is detected by the dielectric study, attributed to a phase transition from a ferroelectric phase to a paraelectric one, while the second peak indicates the presence of a phase transition, confirmed later by the result of the electrical study. All modes pertaining to vibrations of WO42− tetrahedral appear in the Raman spectrum. Moreover, its impedance response is modeled by a single cell formed by a parallel combination of R//C//CPE, i.e. the response of our compound is that of the grain. The variation of the σg and σdc, as a function of temperature, confirms the phase transition observed in the calorimetric study at T2. The conduction mechanism in the two phases indicates that the first phase (I) is described by the CBH model and the second phase by the OLPT model.

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Section: Resultsmentioning

confidence: 99%

Ferroelectric and electrical properties of LiNaWO₄ compound

Krimi

Karoui

Zghal

et al. 2019

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…60). 342 (d) Volatile organic compounds (VOCs). In 2001, Rodrìguez-Mendez and Saja et al documented that the nature of the central lanthanide ion, the presence of tert-butyl groups, and the thickness of the LnPc 2 (Ln = Pr, Lu) LB films could help modulate the device response of their sensor array, which could even discriminate between different types of olive oil aromas upon principal component analysis of the signals.…”

Section: Sensing and Biomedical Applicationsmentioning

confidence: 99%