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. 2017 Jan 1;4(Pt 1):65-71.
doi: 10.1107/S2052252516019072.

Curved crystal morphology, photoreactivity and photosalient behaviour of mononuclear Zn(II) complexes

Caroline Evania Mulijanto  1 , Hong Sheng Quah  1 , Geok Kheng Tan  1 , Bruno Donnadieu  1 , Jagadese J Vittal  1
Affiliations

Curved crystal morphology, photoreactivity and photosalient behaviour of mononuclear Zn(II) complexes

Caroline Evania Mulijanto et al. IUCrJ. .

Abstract

A dramatic effect of crystal morphology, photoreactivity and photosalient property is observed in a zinc(II) complex due to solvent effects and fluorine substitution at the backbone of the ligand. Of the two crystal forms with a 3-fluoro derivative, one yielded a curved morphology of single crystals and the second form shows photoreactivity in the solid state, whereas crystals of the 2-fluoro derivative pop during the [2 + 2] photocycloaddition reaction. This is the first report documenting curved single crystals of metal complexes obtained naturally during crystallization, although such bent crystals have been observed in extended solids naturally, or bent by mechanical force or by UV irradiation.

Keywords: Zn(II) complex; curved single crystals; cycloaddition reaction; photosalient property.

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Figures

Figure 1
Figure 1
A view showing the packing of [Zn(NCS)2(3F-4spy)2] in (2) along the b-axis (a) and another view from the b-axis showing the channels occupied by guest solvents (b).
Figure 2
Figure 2
Curved single crystals of 2 in (a) DMF and thf; (b) DMF, acetonitrile and diethylether; (c) DMF, acetonitrile and thf; (d) DMF, acetonitrile and chloroform; (e) DMF, acetonitrile and ethylene glycol; (f) DMF and methanol.
Figure 3
Figure 3
Packing of [Zn(NCS)2(3F-4spy)2] in 3 which promotes the formation of a one-dimensional coordination polymer upon [2 + 2] cycloaddition reaction under UV light.
Figure 4
Figure 4
One-dimensional packing of photosalient [Zn(NCS)2(2F-4spy)2], 4.
See this image and copyright information in PMC

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