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Self-assembly of self-assembled molecular triangles

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Abstract

A rare variety of self-assembled molecular triangle [Pd3(bpy)3(imidazolate)3](NO3)3, 1 is prepared by the combination of Pd(bpy)(NO3)2 with imidazole, at 1:1 ratio, in acetonitrile-water. Deprotonation of imidazole happened during the course of the complexation reaction where upon the metallomacrocycle is formed. The bowl-shaped trinuclear architecture of 1 is crafted with three peripheral bpy units capable of ππ stacking interactions. While the solution state structure of 1can be best described as a trinuclear complex, in the solid-state well-fashioned intermolecular ππ and CH- π interactions are observed. Thus, in the solid-state further self-assembly of already self-assembled molecular triangle is witnessed. The triangular panels are arranged in a linear manner utilizing intermolecular ππ interactions where upon two out of three bpy units of each molecule participated in the chain formation.

A rare variety of self-assembled molecular triangle [Pd3(bpy)3(imidazolate)3](NO3)3, 1 is prepared by the combination of Pd(bpy)(NO3)2 with imidazole, at 1:1 ratio. In the solid-state, the triangular panels are packed by utilizing intermolecular ππ and CH-π interactions.

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Acknowledgements

We thank DST, India (Project No. SB/S1/IC-05/2014) for providing financial support to our research endeavours. We gratefully acknowledge the single crystal X-ray diffractometer facility funded by IIT Madras.

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Correspondence to DILLIP KUMAR CHAND.

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NARANTHATTA, M.C., RAMKUMAR, V. & CHAND, D.K. Self-assembly of self-assembled molecular triangles. J Chem Sci 126, 1493–1499 (2014). https://doi.org/10.1007/s12039-014-0702-0

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