Analysis of high temperature phase transitions of copper doped (C2H5NH3)2CdCl4 perovskite

Nasr, Férid Ben; Lefi, Ramzi; Guermazi, H.

doi:10.1016/j.molstruc.2018.03.077

Cited by 7 publications

(3 citation statements)

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“…Hybrid materials are the subject of much research, both fundamental and applied [11][12][13][14][15][16]. These works deal in general with the study of the change of the properties of the hybrids notably mechanics [17] thermal [18][19][20][21] electrical [22] and magnetic [23] compared to those of the pure organic polymers.…”

Section: Introductionmentioning

confidence: 99%

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2021

Journal of Materials Sciences and Applications

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The present study, deals with the investigation of new synthesized Urea-CdCl 2 complex [(NH 2 CONH 2 )CdCl 2 ] properties at room temperature. X-ray diffraction (XRD), infrared (IR), UV visible (UV-vis), photoluminescence (PL) measurements are carried out to characterize structural and optical properties. The toxicity of this complex was tested as well.The obtained results confirmed the formula (NH 2 CONH 2 )CdCl 2 for the formed complex, in full agreement with the literature data.XRD indicates that this compound crystallizes at room temperature in the triclinic system with space group. The average crystallite size estimated from Debye Scherrer model was found to be about 61 nm. IR spectrum confirmed the presence of the organic chains of the Urea-CdCl 2 complex. Furthermore, it proved that the cohesion between the organic and inorganic groups is insured by the Cd-O bonds.Besides, the optical properties were examined by UV-vis and PL spectrocopies. The UV-vis absorption measurements showed that the optical absorbance is higher in the Ultraviolet (λ < 300 nm) domain. The optical band gap (E g ) is deduced to be 4.02 eV. Optical parameters were estimated from the absorption data. Moreover, the toxicity of the Urea-CdCl 2 Complex was tested against normal kidney cell line (HEK293) and two cancers cell lines (MDA and T47D). The obtained results showed that Urea-CdCl 2 improved the toxicity against the breast cancer line T47D.

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Section: Introductionmentioning

confidence: 99%

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2021

Journal of Materials Sciences and Applications

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“…The organic component of the hybrid complex provides several useful properties, such as structural flexibility and optical properties, while the inorganic part is responsible for the mechanical and thermal stabilities, in addition to interesting magnetic and dielectric transitions [4,5]. The diversity of such hybrid materials is therefore large, and so offers a wide range of structures, properties, and potential applications [6][7][8][9][10][11]. More specifically, hybrid layered compounds based on the perovskite structure are interesting materials due to their potential application in solar cells [2,3].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic, Physical, and Structural Characteristics in Layered Hybrid Type (C2H5NH3)2MCl4 (M = 59Co, 63Cu, 65Zn, and 113Cd) Crystals

Lim

2020

Molecules

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The thermal, physical, and molecular dynamics of layered hybrid type (C 2 H 5 NH 3 ) 2 MCl 4 (M = 59 Co, 63 Cu, 65 Zn, and 113 Cd) crystals were investigated by thermogravimetric analysis (TGA) and magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. The temperatures of the onset of partial thermal decomposition were found to depend on the identity of M. In addition, the Bloembergen-Purcell-Pound curves for the 1 H spin-lattice relaxation time T 1ρ in the rotating frames of CH 3 CH 2 and NH 3 , and for the 13 C T 1ρ of CH 3 and CH 2 were shown to exhibit minima as a function of the inverse temperature. These results confirmed the rotational motion of 1 H and 13 C in the C 2 H 5 NH 3 cation. Finally, the T 1ρ values and activation energies E a obtained from the 1 H measurements for the H-Cl···M (M = Zn and Cd) bond in the absence of paramagnetic ions were larger than those obtained for the H-Cl···M (M = Co and Cu) bond in the presence of paramagnetic ions. Moreover, the E a value for 13 C, which is distant from the M ions, was found to decrease upon increasing the mass of the M ion, unlike in the case of the E a values for 1 H.Molecules 2020, 25, 1812 2 of 12 corner-sharing MCl 6 octahedra, while those of M = Co 2+ and Zn 2+ are simple MCl 4 tetrahedra [13]. In addition, the organic chains are joined by weak hydrogen bonds between the NH 3 groups and the Cl ions. Indeed, the structural geometries and molecular dynamics of the organic molecules within the layered hybrid structures are important for determining the influence of temperature on the structural phase transitions.As an example, (C 2 H 5 NH 3 ) 2 CoCl 4 crystallizes as an orthorhombic structure, which undergoes a reversible phase transition at 235 K [14]. In addition, (C 2 H 5 NH 3 ) 2 CuCl 4 undergoes phase transitions at 236, 330, 357, and 371 K [7,15-19], its crystal structure at room temperature is orthorhombic [20]. In contrast, (C 2 H 5 NH 3 ) 2 ZnCl 4 undergoes five phase transitions at 231, 234, 237, 247, and 312 K [21], crystallizing as an orthorhombic system at room temperature [22]. Finally, (C 2 H 5 NH 3 ) 2 CdCl 4 undergoes structural phase transitions at 114, 216, 358, and 470 K [9,23,24], whereby the room temperature orthorhombic phase has the Abma space group [23]. The structure of the organic component consists of a double layer of alkylammonium ions with the charged nitrogen atoms oriented to the nearest MCl 4 tetrahedra or MCl 6 octahedra. The phase transition temperatures, lattice constants, structures, and space groups for the four crystals are summarized in Table 1.

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“…[1][2][3][4] This class of hybrid materials is very broad and offers a wide set of different structures, properties, and potential applications. [5][6][7][8][9][10][11][12] A new type of layered perovskite multiferroic, (C 2 H 5 NH 3 ) 2 CuCl 4 , as a metal organic compound was found by Kundys et al 6 Multiferroics refer to materials that simultaneously have two or more of the following properties: spontaneous ferroelectricity, ferromagnetism, or ferroelasticity. 13 (C 2 H 5 NH 3 ) 2 CuCl 4 crystallizes in a layered perovskite structure consisting of nearly isolated layers of corner-sharing ZnCl 6 octahedra, and the interlayer distance is approximately 10 A, where the layers are separated by two layers of ethylammonium cations (C 2 H 5 NH 3 ) + .…”

Section: Introductionmentioning

confidence: 99%

Thermal and structural properties, and molecular dynamics in organic–inorganic hybrid perovskite (C₂H₅NH₃)₂ZnCl₄

Lim

2019

RSC Adv.

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Analysis of high temperature phase transitions of copper doped (C2H5NH3)2CdCl4 perovskite

Cited by 7 publications

References 31 publications

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Thermodynamic, Physical, and Structural Characteristics in Layered Hybrid Type (C2H5NH3)2MCl4 (M = 59Co, 63Cu, 65Zn, and 113Cd) Crystals

Thermal and structural properties, and molecular dynamics in organic–inorganic hybrid perovskite (C₂H₅NH₃)₂ZnCl₄

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Analysis of high temperature phase transitions of copper doped (C2H5NH3)2CdCl4 perovskite

Cited by 7 publications

References 31 publications

Untitled

Untitled

Thermodynamic, Physical, and Structural Characteristics in Layered Hybrid Type (C2H5NH3)2MCl4 (M = 59Co, 63Cu, 65Zn, and 113Cd) Crystals

Thermal and structural properties, and molecular dynamics in organic–inorganic hybrid perovskite (C2H5NH3)2ZnCl4

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Thermal and structural properties, and molecular dynamics in organic–inorganic hybrid perovskite (C₂H₅NH₃)₂ZnCl₄