Shaw Bikash Kumar, Castillo-Blas Celia, Thorne Michael F, Ríos Gómez María Laura, Forrest Tom, Lopez Maria Diaz, Chater Philip A, McHugh Lauren N, Keen David A, Bennett Thomas D
Department of Materials Science and Metallurgy, University of Cambridge CB3 0FS UK
Departamento de Química Inorgánica, Universidad Autónoma de Madrid 28049 Madrid Spain.
Chem Sci. 2022 Jan 20;13(7):2033-2042. doi: 10.1039/d1sc07080k. eCollection 2022 Feb 16.
Four novel dicyanamide-containing hybrid organic-inorganic ABX structures are reported, and the thermal behaviour of a series of nine perovskite and non-perovskite [AB(N(CN))] (A = (CH)N, (CH)N, (CH)N; B = Co, Fe, Mn) is analyzed. Structure-property relationships are investigated by varying both A-site organic and B-site transition metal cations. In particular, increasing the size of the A-site cation from (CH)N → (CH)N → (CH)N was observed to result in a decrease in through an increase in Δ . Consistent trends in with metal replacement are observed with each A-site cation, with Co < Fe < Mn. The majority of the melts formed were found to recrystallise partially upon cooling, though glasses could be formed through a small degree of organic linker decomposition. Total scattering methods are used to provide a greater understanding of the melting mechanism.
报道了四种新型含双氰胺的有机-无机杂化ABX结构，并分析了一系列九种钙钛矿和非钙钛矿型[AB(N(CN))]（A = (CH)N、(CH)N、(CH)N；B = Co、Fe、Mn）的热行为。通过改变A位有机阳离子和B位过渡金属阳离子来研究结构-性能关系。特别地，观察到随着A位阳离子尺寸从(CH)N → (CH)N → (CH)N增加，通过Δ的增加导致 减小。对于每个A位阳离子，随着金属取代，在 中观察到一致的趋势，即Co < Fe < Mn。发现形成的大多数熔体在冷却时会部分重结晶，不过通过少量有机连接体分解可以形成玻璃。使用全散射方法以更好地理解熔化机制。
