| Autor: |
Fateev SA; Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia. alexey.bor.tarasov@yandex.ru., Kozhevnikova VY; Department of Chemistry, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia., Kuznetsov KM; Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia. alexey.bor.tarasov@yandex.ru., Belikova DE; Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia. alexey.bor.tarasov@yandex.ru., Khrustalev VN; Inorganic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198, Moscow, Russia.; N.D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninsky Prosp., 119991, Moscow, Russia., Goodilin EA; Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia. alexey.bor.tarasov@yandex.ru.; Department of Chemistry, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia., Tarasov AB; Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia. alexey.bor.tarasov@yandex.ru.; Department of Chemistry, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia. |
| Abstrakt: |
In recent years, hybrid manganese(II) halides (HMHs) have attracted wide attention due to their impressive optical properties, low toxicity, and facile synthetic processibility. Being effective reabsorption-free phosphors, these compounds demonstrate the potential to be used as low-cost solution-processable scintillators. However, most of the HMHs studied to date contain bulk organic cations and, as a result, are characterized by low density and low X-ray stopping power. For this reason, we studied manganese(II) bromides with compact organic cations such as formamidinium (FA + ) and acetamidinium (AcA + ). In particular, we synthesized four new phases, two of which are characterized by octahedral coordination of manganese ions ((FA)MnBr 3 and (AcA)MnBr 3 ) and red emission, whereas the other two have tetrahedrally coordinated Mn 2+ ions ((FA) 3 MnBr 5 and (AcA) 2 MnBr 4 ) and green emission. Photoluminescence (PL) and radioluminescence measurements demonstrated high PL quantum yields and reasonable scintillation light yields of acetamidinium-based compounds. In addition, unlike most known HMH-based scintillators, the discovered materials have a relatively high density due to the small fraction of the volume occupied by organic cations, so their X-ray attenuation coefficients are comparable to the well-known oxide scintillators. |
