Maxwell-Boltzmann statistics applied in the study of photoluminescent emission bands in the (S)-(-)-1-(4-bromophenyl)-N-1,2,3,4-(tetrahydro-1-naphthyl)methanimine organic crystals

Green chemistry synthesis and structural and optical study of Dy2(CO3)3→ Dy2O3 transition

“…The reflections correspond to those of the lanthanidetype rare-earth carbonates, and all the reflections can be indexed in the orthorhombic system [35], both nanomaterials are identified to Dy 2 (CO 2 ) 3( s) nanomaterial, which is in agreement with Niasari et al [5] and Nasrabadi1 et al [2]. However, the plane crystalline located at 2θ ∼ 51.0 • (is indicated in the diffractogram by an asterisk in the upper part of the crystalline plane) can be readily indexed to a pure hexagonal phase of Dysprosium hydroxide Dy(OH) 3 (JCPDS19− 0430) [36]. A particular structural characteristic of nanomaterials is associated with the gradual widening and relative decrease in the crystalline planes, a situation here observed in our chemical compounds.…”

“…A particular structural characteristic of nanomaterials is associated with the gradual widening and relative decrease in the crystalline planes, a situation here observed in our chemical compounds. A particular and important feature of the structural behavior of organic and inorganic materials is related to: crystalline stacking faults, grain boundaries, stoichiometry, and in general the intrinsic native crystalline defects, which are related in principle with the widening and decrease of the crystalline planes that inevitably originate during crystalline growth [36]. According to the experimental XRD diffraction patterns, it is possible to observe that a crystalline plane is oriented at (222) direction in both nanomaterials with TT and without TT, respectively, associated with the experimental conditions of synthesis and requires a deep and detailed study applying a suitable theoretical model.…”

A long-chain based bromo and methyl substituted chalcone derivatives; experimental and theoretical approach on nonlinear optical single crystals

“…Similarly for 4BPMS, defects states are; (a) 449 nm in violet region (b) 456 nm, 461 nm, 466 nm, 471 nm, 480 nm and 490 nm in blue region (c) 568 nm in green region (d) 590 nm yellow region respectively. In both the samples, the defect states in violet and blue region are due to overlapping of the several emission peaks and broad region with defect states in blue region may be due to stacking faults[48,49]. The…”

Crystalline native defects in ZnO analyzed by photoluminescence applying Maxwell-Boltzmann statistics in the visible region

“…The Chemical Bath Deposition (CBD) technique, has been successfully applied at chemical synthesis of nanocrystals because it is versatile and relatively inexpensive, in which the chemical parameters of crystal growth are easily experimentally controlled [17]. Previous report, we systematically presented experimental details on the chemical synthesis to prepare rare earth and oxide-hydroxide transition metal and semiconductor nanocrystals [14,15,18].…”

“…The inorganic nanomaterial is synthesized in a thin solid film format applying the Chemical Bath Deposition (CBD) technique. We further note that in this study we used the experimental results previously published [14]. Using the spectra obtained through the Photoluminescence spectroscopic technique located at UV-Vis region, the emission bands are assigned to crystalline defects associated with vacancies, intertices, stacking faults, different pollutants, stoichiometry, etc., are examined to find the correlation of these emission signals with the native crystalline defects [15].…”