Abstract
A crystallographic analysis of optical fluorescent images of two-dimensional polygonal structures of J-aggregates of 3,3′-di(γ-sulfopropyl)-5,5′-dichlorothiamonomethinecyanine (MCD) cyanine dye has been performed. In aqueous solutions, MCD forms striplike J-aggregates in the form of extended strips with parallel sides and an oblique or right-angled end. It is found that the acute angle in oblique J-aggregates has a single value close to 45°. The staircase model of molecular packing in oblique J-aggregates is proposed with a slippage angle of 25° expected from the molecular simulation. Within this model the sides of aggregates are formed by the [100] and \([\bar 110]\) faces, and the acute angle between them is equal to the experimentally observed angle. Right-angled rectangular J-aggregates are presumably described by the ladder model.
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Dedicated to the International Year of Crystallography
Original Russian Text © V.V. Prokhorov, O.M. Perelygina, E.I. Mal’tsev, A.V. Vannikov, 2014, published in Kristallografiya, 2014, Vol. 59, No. 6, pp. 985–989.
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Prokhorov, V.V., Perelygina, O.M., Mal’tsev, E.I. et al. Crystalline structure of two-dimensional cyanine dye J-aggregates. Crystallogr. Rep. 59, 896–899 (2014). https://doi.org/10.1134/S1063774514060236
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DOI: https://doi.org/10.1134/S1063774514060236