A Silver Complex of 6,7-Dicyanodipyridoquinoxaline: π-Stacking Interactions and Luminescence

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The reaction of 6,7-dicyanodipyridoquinoxaline (DICNQ) with AgNO3 in a 1:1 molar ratio by solution method gave a new complex [Ag(DICNQ)2]NO3 1. Single-crystal X-ray diffraction analysis reveals that the complex crystallizes in the space group Ibca of orthorhombic system with eight formula units in a cell. Crystal data for 1: a = 15.7055(17), b = 18.411(2), c = 20.680(2) (A), V = 5979.7(11) (A)3, Z = 8, C32H12AgN13O3, Mr = 734.42, Dc = 1.632 g/cm3, (μ = 0.734 mm-1, F(000) = 2928, S = 1.023 and T = 293(2) K. The final R = 0.0659 and wR = 0.1927 for 2118 observed reflections with I > 2σ(I), and R = 0.0801 and wR = 0.2196 for all data. The complex builds up a packing structure by π-π stacking interactions and shows a luminescent feature.
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