TY - JOUR
T1 - Reaction of [Ni(H2O)6](NO3)2 with gaseous NH3; crystal growth via in-situ solvation
AU - Breternitz, Joachim
AU - Farrugia, Louis J.
AU - Godula-Jopek, Agata
AU - Saremi-Yarahmadi, Sina
AU - Malka, Iwona E.
AU - Hoang, Tuan K.A.
AU - Gregory, Duncan H.
N1 - Funding Information:
DHG thanks Airbus Group Innovations for funding a studentship for JB, the University of Glasgow for funding a research position for SSY and the EPSRC (grant reference: EP/I022570/1 ) for financial support of this work.
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/2/15
Y1 - 2015/2/15
N2 - Traditional techniques for the growth of crystals are typically lengthy and are based on the slow over-saturation of either solutions or melts. By contrast, the reactions of solids at moderate temperatures and pressures normally lead to the formation of powders of small crystallites. In this paper, we present a new and effective method to grow crystals of surprisingly large sizes (up to ca. 0.05 mm in the largest dimension). We use the reaction of [Ni(H2O)6](NO3)2 with NH3(g) at room temperature to create macrocrystals of [Ni(NH3)6](NO3)2. The synthesis proceeds via simple ligand exchange and crystal growth is facilitated in-situ via the solvent effect of the released water. The nitrate ammine product was characterised by powder X-ray diffraction (PXD) and Scanning Electron Microscopy (SEM). This reaction is important since it demonstrates that aquo complexes can undergo facile ligand exchange with gaseous ammonia under realistic conditions for ammonia storage. The single crystal structure of [Ni(H2O)6] (NO3)2 was determined for the first time below ambient temperature (at 100 K). The latter result offers no evidence to support a previously postulated low temperature phase-transformation at 100≤T/K≤295.
AB - Traditional techniques for the growth of crystals are typically lengthy and are based on the slow over-saturation of either solutions or melts. By contrast, the reactions of solids at moderate temperatures and pressures normally lead to the formation of powders of small crystallites. In this paper, we present a new and effective method to grow crystals of surprisingly large sizes (up to ca. 0.05 mm in the largest dimension). We use the reaction of [Ni(H2O)6](NO3)2 with NH3(g) at room temperature to create macrocrystals of [Ni(NH3)6](NO3)2. The synthesis proceeds via simple ligand exchange and crystal growth is facilitated in-situ via the solvent effect of the released water. The nitrate ammine product was characterised by powder X-ray diffraction (PXD) and Scanning Electron Microscopy (SEM). This reaction is important since it demonstrates that aquo complexes can undergo facile ligand exchange with gaseous ammonia under realistic conditions for ammonia storage. The single crystal structure of [Ni(H2O)6] (NO3)2 was determined for the first time below ambient temperature (at 100 K). The latter result offers no evidence to support a previously postulated low temperature phase-transformation at 100≤T/K≤295.
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U2 - 10.1016/j.jcrysgro.2014.11.021
DO - 10.1016/j.jcrysgro.2014.11.021
M3 - Article
AN - SCOPUS:84919754570
SN - 0022-0248
VL - 412
SP - 1
EP - 6
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
ER -