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Structural features in some layered hybrid copper chloride perovskites: ACuCl4 or A2CuCl4

DOI: 10.1021/acs.inorgchem.1c00705 DOI Help

Authors: Ceng Han (University of St Andrews) , Alasdair J. Bradford (University of St Andrews) , Alexandra M. Z. Slawin (University of St Andrews) , Bela E. Bode (University of St Andrews) , Edoardo Fusco (University of St Andrews) , Stephen L. Lee (University of St Andrews) , Chiu C. Tang (Diamond Light Source) , Philip Lightfoot (University of St Andrews)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Inorganic Chemistry

State: Published (Approved)
Published: July 2021
Diamond Proposal Number(s): 23579

Abstract: We present three new hybrid copper(II) chloride layered perovskites of generic composition ACuCl4 or A2CuCl4, which exhibit three distinct structure types. (m-PdH2)CuCl4 (m-PdH22+ = protonated m-phenylenediamine) adopts a Dion–Jacobson (DJ)-like layered perovskite structure type and exhibits a very large axial thermal contraction effect upon heating, as revealed via variable-temperature synchrotron X-ray powder diffraction (SXRD). This can be attributed to the contraction of an interlayer block, via a slight repositioning of the m-PdH22+ moiety. (3-AbaH)2CuCl4 (3-AbaH+ = protonated 3-aminobenzoic acid) and (4-AbaH)2CuCl4 (4-AbaH+ = protonated 4-aminobenzoic acid) possess the same generic formula as Ruddlesden–Popper (RP) layered perovskites, A2BX4, but adopt different structures. (4-AbaH)2CuCl4 adopts a near-staggered structure type, whereas (3-AbaH)2CuCl4 adopts a near-eclipsed structure type, which resembles the DJ rather than the RP family. (3-AbaH)2CuCl4 also displays static disorder of the [CuCl4]∞ layers. The crystal structures of each are discussed in terms of the differing nature of the templating molecular species, and these are compared to related layered perovskites. Preliminary magnetic measurements are reported, suggesting dominant ferromagnetic interactions.

Journal Keywords: Chemical structure; Crystal structure; Layered materials; Layers; Perovskites

Subject Areas: Materials, Chemistry

Instruments: I11-High Resolution Powder Diffraction

Added On: 17/07/2021 21:19

Discipline Tags:

Chemistry Materials Science Perovskites Metallurgy Organometallic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction