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(CH 3 NH 3 ) 2 PdCl 4 : A Compound with Two‐Dimensional Organic–Inorganic Layered Perovskite Structure
Author(s) -
Huang Tang Jiao,
Thiang Zhang Xian,
Yin Xuesong,
Tang Chunhua,
Qi Guojun,
Gong Hao
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503680
Subject(s) - perovskite (structure) , phase (matter) , materials science , inorganic chemistry , absorption (acoustics) , electrical resistivity and conductivity , atmosphere (unit) , alkyl , chemistry , crystallography , organic chemistry , thermodynamics , physics , composite material , quantum mechanics
The synthesis of previously unknown perovskite (CH 3 NH 3 ) 2 PdCl 4 is reported. Despite using an organic cation with the smallest possible alkyl group, a 2D organic–inorganic layered Pd‐based perovskites was still formed. This demonstrates that Pd‐based 2D perovskites can be obtained even if the size of the organic cation is below the size limit predicted by the Goldschmidt tolerance‐factor formula. The (CH 3 NH 3 ) 2 PdCl 4 phase has a bulk resistivity of 1.4 Ω cm, a direct optical gap of 2.22 eV, and an absorption coefficient on the order of 10 4 cm −1 . XRD measurements suggest that the compound is moderately stable in air, an important advantage over several existing organic–inorganic perovskites that are prone to phase degradation problems when exposed to the atmosphere. Given the recent interest in organic–inorganic perovskites, the synthesis of this new Pd‐based organic–inorganic perovskite may be helpful in the preparation and understanding of other organic–inorganic perovskites.