Optical and scintillation properties of hybrid manganese(II) bromides with formamidinium and acetamidinium cations

Optical and scintillation properties of hybrid manganese(II) bromides with formamidinium and acetamidinium cations Full article

Journal

Dalton Transactions
ISSN: 1477-9234 , E-ISSN: 1477-9226

Output data

Year: 2024, Volume: 53, Number: 6, Pages: 2722-2730 Pages count : 9 DOI: 10.1039/d3dt03452f

Authors

Fateev Sergey A. ¹ , Khudoleeva Vladislava ² , Kuznetsov Kirill M ¹ , Belikova Daria E. ¹ , Khrustalev Victor N ^3,4 , Goodilin Eugene A. ¹ , Tarasov Alexey B. ¹

Affiliations

1	Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia
2	Department of Chemistry, Lomonosov Moscow State University, 1 Lenin Hills, 119991, Moscow, Russia
3	Inorganic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198, Moscow, Russia
4	N.D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninsky Prosp., 119991, Moscow, Russia

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)MnBr3 and (AcA)MnBr3) and red emission, whereas the other two have tetrahedrally coordinated Mn2+ ions ((FA)3MnBr5 and (AcA)2MnBr4) 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.

Fateev S.A. , Khudoleeva V. , Kuznetsov K.M. , Belikova D.E. , Khrustalev V.N. , Goodilin E.A. , Tarasov A.B.
Optical and scintillation properties of hybrid manganese(II) bromides with formamidinium and acetamidinium cations
Dalton Transactions. 2024. V.53. N6. P.2722-2730. DOI: 10.1039/d3dt03452f WOS Scopus OpenAlex

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