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Complex [Sr2(pdc)2(H2O)7]·H2O(1, H2 pdc=2,3-pyrazinedicarboxylic acid) has been synthesized and characterized by single-crystal X-ray diffraction studies and FT-IR. Structural determination reveals that there are two crystallographically independent strontium ions in 1. The coordination geometry of Sr(1) is a nine-coordinated distorted monocapped tetragonal antiprism, while Sr(2) is a nine-coordinated distorted monocapped tetragonal prism. The ligand pdc 2- takes two different connecting modes and links Sr(Ⅱ) centers to generate a 2D layer structure. The 2D layers are linked through O-H···O and O-H···N hydrogen bonds to form a 3D framework structure. Thermal stability and luminescent properties of complex 1 are investigated. 1 belongs to the monoclinic system, space group P21/n with a=10.7182(10), b=7.0377(6), c=29.225(3) , β=95.7170(10)o, Z=4, V=2193.5(3) 3 , M r=651.56, D c=1.973 g/cm 3 , F(000)=1296, μ=4.951 mm -1 , the final R=0.0318 and wR=0.0726 for 3938 observed reflections with I > 2σ(I).
Complex [Sr2 (pdc) 2 (H2O) 7] H2O (1, H2 pdc = 2,3-pyrazinedicarboxylic acid) has been synthesized and characterized by single-crystal X-ray diffraction studies and FT- there are two crystallographically independent strontium ions in 1. The ligand geometry of Sr (1) is a nine-coordinated distorted monocapped tetragonal antiprism, while Sr (2) is a nine-coordinated distorted monocapped tetragonal prism. The ligand pdc 2- takes two different connecting modes and links Sr (Ⅱ) centers to generate a 2D layer structure. The 2D layers are linked through OH ··· O and OH ··· N hydrogen bonds to form a 3D framework structure. Thermal stability and luminescent properties of complex 1 belongs to the monoclinic system, space group P21 / n with a = 10.7182 (10), b = 7.0377 (6), c = 29.225 3, β = 95.7170 (10) o, Z = 4 , V = 2193.5 (3) 3, M r = 651.56, D c = 1.973 g / cm 3, F (000) = 1296, μ = 4.951 mm -1, the final R = 0.0318 and wR = 0.0726 for 3938 observed re flections with I> 2σ (I).