Department of Materials Science and Metallurgy, University of Cambridge, CB3 0FS, UK.
Chem Commun (Camb). 2018 Apr 10;54(30):3751-3754. doi: 10.1039/c8cc00907d.
Following the recent discovery of the [A]Mn(H2POO)3 (H2POO- = hypophosphite) perovskite family, we report the A = [NH2(CH3)2]+ (dimethylammonium, DMA) member. This phase shows an unusually large unit cell due to the position of the A-site cation within the perovskite cage windows rather than the centre, as is the norm. We discuss the tendency of the hypophosphite perovskite skeleton to accommodate differently shaped A-site cations through the generation of unconventional tilts and columnar shifts, then enumerate these tilts and shifts for all known [A]Mn(H2POO)3 phases.
继最近发现[A]Mn(H2POO)3（H2POO- = 次膦酸根）钙钛矿家族后，我们报告了 A = [NH2(CH3)2]+（二甲铵，DMA）成员。由于 A 位阳离子在钙钛矿笼窗中的位置而不是中心，该相显示出异常大的单位晶胞，这是常规的。我们讨论了次膦酸根钙钛矿骨架通过产生非常规倾斜和柱状位移来容纳不同形状的 A 位阳离子的趋势，然后列举了所有已知[A]Mn(H2POO)3 相的这些倾斜和位移。
