Abstract
Under hydrothermal conditions, using 5-methyl-pyrazine-2-carboxylic acid (HL) and lead(II) bromide, a new 2D lead(II) framework [Pb(L)(μ2-Br)(H2O)]n (1) can be isolated, in which infinite Pb-O-Pb and Pb-Br-Pb helical chains can be observed. The crystal crystallizes in the monoclinic system, space group P2(1)/c, a = 7.5493(10), b = 6.6775(9), c = 19.335(3) Å, β = 92.884(2)°, and Z = 1. The X-ray analysis shows that strong O-H···N and weak O-H···Br hydrogen bonds further extending 1 into a 3D supramolecular packing architecture. Solid state luminescent spectrum of 1 also has been investigated indicating strong emission bands centered at 453 nm.
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