Abstract
The directed synthesis of non-centrosymmetric copper (II) bromo-complex has been achieved through the use of homochiral organic molecule. Reaction containing (S)-(−)-3-aminoquinuclidine, CuBr2, HBr and H2O were subjected to mild hydrothermal conditions, resulting in the growth of single crystals of [(S)C7H16N2][CuBr4]. The compound crystallizes in the non polar space group P212121(No. 19), which exhibits the enantiomorphic crystal class 222 (D2). In the crystal structure, the tetrabromocuprate(II) anion is connected to three organic cations through NH…Br hydrogen bonds to form cation-anion-cation molecular units, which are held together by means of offset face-to-face interactions to give one-dimensional chains. DSC measurements indicated that the compound [(S)C7H16N2][CuBr4] underwent a reversible phase transition at 80 °C. [(S)C7H16N2][CuBr4] is more than 1.2 times as efficient as KDP in second harmonic generation; making it a potentially attractive material for non-linear optical applications. The synthesized product was also screened for in vitro antioxidant and antimicrobial activities, while showing favorable antioxidant activities against DPPH as well as the discoloration of β-carotene.
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