Synthesis and luminescent properties of Mn-doped alpha-tricalcium phosphate

The influence of annealing conditions on the Ca/P ratio and phase transformations in bulk calcium phosphates

“…At the same time CPP is a commonly obtained neighboring phase in TCP synthesized by wet chemical methods. 19,20 The FTIR spectra of the powders annealed in a vacuum are depicted in Fig. 3.…”

Polymorphism, polytypism and modular aspect of compounds with the general formula A 2 M 3(TO4)4 (A = Na, Rb, Cs, Ca; M = Mg, Mn, Fe3+, Cu2+; T = S6+, P5+): order–disorder, topological description and DFT calculations

“…Alkaline sulfates and phosphates of alkaline-earth and transition elements attract interest because of electrochemical properties and their application as electrode materials for lithium-and sodium-ion batteries (Hwang et al, 2017;Reynaud et al, 2014;Masquelier & Croguennec, 2013). Moreover, these compounds are also characterized by the luminescent (Sinusaite et al, 2021;Majgier et al, 2021;Nan et al, 2020) and nonlinear optical (Xu et al, 2021;Rajeswari et al, 2018;Joice Malini et al, 2021;Dang et al, 2021;Bai et al, 2021;Marimuthu & Perumal, 2021), magnetic (Kovrugin et al, 2019;Li et al, 2020;Bolotina et al, 2019;Benhsina et al, 2021;Maspoch et al, 2007) and catalytical (Moffat, 1978) properties.…”

Synthesis, structural and luminescent properties of Mn-doped calcium pyrophosphate (Ca2P2O7) polymorphs

“…Qualitative similarities are expected in the EPR spectra of Mn 2+ -doped CPs 23 , 29 , 30 , 47 – 51 . Mn 2+ is an electron spin = 5/2 system, which leads to six possible quantum states M S = -5/2, -3/2, …, + 5/2.…”

“…In polycrystalline CPs, HF structure is commonly resolved only for the M S = + 1/2 ↔ − 1/2 transition (≈ 350 mT in Fig. 4 ) 23 , 29 , 30 , 48 – 51 .…”

“…Luminescent properties of Mn 2+ ions were previously investigated in other CPs such as HA, α- and β-TCP. All studied materials exhibited broadband emission in the red spectral region; however, the position of emission maximum depended on the crystal structure of particular material 29 , 30 . Moreover, due to their paramagnetic nature, Mn 2+ ions can be used as probes, which allow investigation of structural properties of materials by some powerful techniques such as electron paramagnetic resonance 31 .…”