Formation of gold nanoparticles in gold ruby glass: The influence of tin |
| |
| Authors: | S Haslbeck K-P Martinek L Stievano F E Wagner |
| |
| Institution: | (1) Departamento de Química, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901, MG, Brazil;(2) Laboratório de Física Aplicada (LFA/CDTN), Centro de Desenvolvimento da Tecnologia Nuclear, CEP 30123-970, MG, Brazil |
| |
| Abstract: | A 119Sn Mössbauer study was carried out of tin(IV) complexes with 2-benzoylpyridine thiosemicarbazone (H2Bz4DH) and its N(4)-methyl (H2Bz4M) and N(4)-phenyl (H2Bz4Ph) derivatives: Sn(2Bz4DH)Cl3] (1), Sn(2Bz4DH)PhCl2] (2), Sn(2Bz4M)Cl3] (3), H22Bz4M]2Ph2SnCl4] (4), Sn(2Bz4Ph)PhCl2] (5), Sn(2Bz4Ph)Ph2Cl] (6), in which H2Bz4R stands for the neutral ligand and 2Bz4R stands for the anionic thiosemicarbazone. In addition, 119Sn Mössbauer studies of the tin(IV) complexes Sn(H4Bz4DH)2Cl4H2O] (7), Sn(H4BzPS)2Cl4H2O] (8) with 4-benzoylpyridine thiosemicarbazone (H4Bz4DH) and the correspondent semicarbazone (H4BzPS) were performed. The isomer shifts decrease upon coordination due to the variation in the percentage of s character as tin changes from approximately sp3 hybridization in the tin salts to sp3d2 in the octahedral or sp3d3 in the heptahedral complexes. The Mössbauer parameters of compound (4) showed the existence of two tin(IV) sites, which have been attributed to the presence of the cis and trans isomers. |
| |
| Keywords: | 119Sn Mö ssbauer tin(IV) complexes thiosemicarbazones semicarbazones |
| 本文献已被 SpringerLink 等数据库收录！ |
|
