Framework and coordination strain in two isostructural hybrid metal–organic perovskites. Issue 36 (21st August 2018)

• Record Type: Journal Article
• Authors: Sobczak, Szymon; Chitnis, Abhishek; Andrzejewski, Michał; Mączka, Mirosław; Gohil, Smita; Garg, Nandini; Katrusiak, Andrzej
• Is Part Of: CrystEngComm. Volume 20:Issue 36(2018)
• Page Start: 5348
• Page End: 5355
• Publication Date: 2018-08-21
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce00884a
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Compression of DmaNiFor3 and DmaCoFor3 has been investigated by single-crystal X-ray diffraction and Raman spectroscopy. Abstract : Monotonic compression of two iso-structural hybrid metal–organic perovskites [DMA]M(HCOO)3 (M = Co, Ni) has been connected to their structural distortions. The strongest effects of pressure occur in the tilts of the MO6 octahedra, M–O bond compression, angular distortions within the MO6 octahedra and small folding between the octahedra and formate units. The anisotropic stronger compression along the trigonal axis is consistent with NH⋯O bonding nearly perpendicular to this direction. Raman spectra indicate a first order solid-state phase transition between 3–5 GPa in both formates, which can be associated with the symmetry breaking induced by the ordering of the Dma cation.