Jump to main content
Jump to site search

Issue 47, 2018
Previous Article Next Article

Temperature-dependent studies of a new two-dimensional cadmium dicyanamide framework exhibiting an unusual temperature-induced irreversible phase transition into a three-dimensional perovskite-like framework

Author affiliations

Abstract

We report the synthesis, crystal structure, and thermal, dielectric, optical and phonon properties of a new two-dimensional (2D) cadmium(II) complex [(C3H7)4N][Cd(N(CN)2)3]. Our results show that this compound crystallizes in a two-dimensional monoclinic structure, with the space group P2/n, with ordered tetrapropylammonium cations and disorder of some dicyanamide linkers. It undergoes a structural phase transition at 245 K into another low-temperature (LT) monoclinic structure, with the space group P21/n. X-ray diffraction, dielectric, IR and Raman studies show that freezing of the dca motions stands at the origin of the phase transition. Optical studies indicate that this material has an energy band gap of 4.83 eV and exhibits intense bluish-white emission under 266 nm excitation. Upon heating, this compound undergoes an irreversible phase transition near 390 K associated with significant bond rearrangement. The high-temperature (HT) phase has a three-dimensinal (3D) perovskite-like structure. [(C3H7)4N][Cd(N(CN)2)3] is, therefore, the first example of a hybrid organic–inorganic dicyanamide exhibiting a temperature-induced reconstructive transition from a 2D (layered) structure to a 3D (perovskite-like) structure.

Graphical abstract: Temperature-dependent studies of a new two-dimensional cadmium dicyanamide framework exhibiting an unusual temperature-induced irreversible phase transition into a three-dimensional perovskite-like framework

Back to tab navigation

Supplementary files

Publication details

The article was received on 04 Oct 2018, accepted on 20 Nov 2018 and first published on 26 Nov 2018


Article type: Paper
DOI: 10.1039/C8CP06190D
Citation: Phys. Chem. Chem. Phys., 2018,20, 29951-29958
  •   Request permissions

    Temperature-dependent studies of a new two-dimensional cadmium dicyanamide framework exhibiting an unusual temperature-induced irreversible phase transition into a three-dimensional perovskite-like framework

    M. Mączka, A. Gągor, M. Ptak, D. Stefańska and A. Sieradzki, Phys. Chem. Chem. Phys., 2018, 20, 29951
    DOI: 10.1039/C8CP06190D

Search articles by author

Spotlight

Advertisements