In order to form flexible printed circuits through inkjet printing technique, the Pd(ll) catalyst ink was printed on the surface of polyimide film modified with KOH solution and then reduced with NaBH4 solution to extract the Pd(O) catalyst nuclei. The concentration of the Pd(ll) catalyst ink and reduction time showed a significant influence on the microstructure of the Pd(O) catalyst nuclei and the formation of Cu patterns through electroless plating. When reduction time exceeded 1 minute, and as the concentration of the Pd(II) catalyst ink increased above 0.02 M, the catalyst nuclei began aggregation, resulting in Cu patterns with thick and more defects.
Key indicators: single-crystal X-ray study; T = 295 K; mean (C-C) = 0.004 Å; R factor = 0.025; wR factor = 0.068; data-to-parameter ratio = 15.9.In the title complex, [Zn(N 3 ) 2 (C 3 H 4 N 2 S) 2 ], the Zn II atom is tetrahedrally coordinated by two terminal azide ligands and by the ring N atoms of two different 2-aminothiazole ligands. Intramolecular N-HÁ Á ÁN hydrogen bonds between the amino groups of both 2-aminothiazole ligands and the N atom of one of the azide ligands ensure that the heterocyclic rings are oriented in the same direction. Intermolecular N-HÁ Á ÁN hydrogen bonds link the molecules into zigzag sheets in the ac plane.
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Key indicators: single-crystal X-ray study; T = 295 K; mean (C-C) = 0.005 Å; disorder in main residue; R factor = 0.028; wR factor = 0.078; data-to-parameter ratio = 17.1.
CommentCrystal engineering of coordination complexes is motivated by the development of materials with useful properties such as catalytic, magnetic, electronic and optical (Braga et al., 1998). The pseudo-halide ions, e.g. CN − , SCN − , N 3 −
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