Investigation of the electronic structure and photoluminescence properties of Eu3+ in Sr2Mg1−x Zn x Si2O7 (0⩽ x ⩽ 1)

Abstract

has been used as a structural probe because of its particularly sensitive emission [10][11][12]. In addition, the O 2 -Eu 3+ charge transfer (CT) transition involves both the luminescent center and host, so it can be used to probe the coupling between the luminescent center and host.In the present work, undoped and Eu 3+ -doped Sr 2 Mg 1x -Zn x Si 2 O 7 (0  x  1) samples were prepared. Inductively coupled plasma (ICP), Fourier transform infrared (FT-IR),

Effect of thermal annealing on the structural and optical properties of tris‐(8‐hydroxyquinoline)aluminum(III) (Alq3) films

“…The thermal stress in Alq 3 thin film-induced crystallization and device failure has been reported by Xu et al (5). Wang et al (4) reported the phase transition of Alq 3 powder to take place between 643 K and 669 K. Furthermore, they reported the melting and evaporation of Alq 3 is at 703 K. Most of the recent studies have been focused on the optimization of the device (6), to improve the stability of the device (7), the charge transport mechanisms (8,9) and the tuning of OLED emission spectrum (4). Few studies were focused on the correlation between molecular structure and optical properties of Alq 3 films (temperature and thickness stability).…”

Metal‐Organic Framework Based Sensors for Benzene Vapor

“…This host‐guest interaction results in a change in the reflectivity values of the PC sensor, which allows for the response to different concentrations of benzene vapor (Figures 4b–d). To illustrate the importance of structural effects in the detection of benzene vapor, ZIF‐7 (also known as MAF‐3, [29] [Zn(BIM) 2 ], HBIM=benzimidazole) and ZIF‐67 ([Co(MIM) 2 ]) were also used to fabricate PC sensors to compare the performances with that of the ZIF‐8 based PC sensor, respectively. The results show that the ZIF‐8 based PC sensor exhibits the most sensitive response performance to benzene under the same conditions, attributable to the fact that ZIF‐8 is more easier to be deformed to open the pore window for absorption of benzene molecules than that of ZIF‐67.…”

Effects of confining pressure and pore pressure on multipole borehole acoustic field in fluid-saturated porous media

“…Zhang et al [29] employed the Biot two-phase medium model to simulate oil reservoirs and systematically conducted theoretical derivation, mode decomposition analysis, and full-wave computation of the acoustic wavefield excited by multipole sources in the borehole. Zhang and Wang [30] introduced an analytical perturbation method to address the problem of multi-source acoustic well logging in transersely isotropic two-phase media. Building upon the BISQ model, Cui et al [31] studied the dispersion and attenuation of elastic waves in non-Newtonian fluidsaturated porous media.…”