Gold(III) Complex of Caffeine: Synthesis, Isolation and Spectroscopic Characterization
Au(III)-caffeine complex was synthesized and characterized by means of solid-state linear-dichroic infrared spectral analysis (IRLD), 1H-NMR, MS, DSC and TGA methods. The caffeine (I) is monodentate and coordinated with metal ion through its N9 atom at molar ratio metal to ligand 1:1. The other 3 positions in the Au(III) coordination sphere are occupied by Cl-, thus forming [Au3+(C8H10N4O2)Cl3] complex. IR-characteristic band assignment in the 4000-400 cm-1 IR region of pure ligand and corresponding Au(III)complex was performed.
Gold(III) Complex of Caffeine: Synthesis, Isolation and Spectroscopic Characterization
Au(III)-caffeine complex was synthesized and characterized by means of solid-state linear-dichroic infrared spectral analysis (IRLD), 1H-NMR, MS, DSC and TGA methods. The caffeine (I) is monodentate and coordinated with metal ion through its N9 atom at molar ratio metal to ligand 1:1. The other 3 positions in the Au(III) coordination sphere are occupied by Cl-, thus forming [Au3+(C8H10N4O2)Cl3] complex. IR-characteristic band assignment in the 4000-400 cm-1 IR region of pure ligand and corresponding Au(III)complex was performed.
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- M. Melnik, L. Mackov and J. Mrozinski, Polyhedron 7, 1745-49 (1988).
- M. Melnik, I. Potorak, L. Mackov and D. Miklo, Polyhedron 15, 2159-62 (1996).
- S.C. Mojumdar, M. Melnik and E. Jona, Chem. Papers 53, 309-14 (1999).
- J. Reedijk, Chem. Commun. 801-6 (1996).
- D.B. Zambe and S.J. Lippard, Trends Biochem. Sci. 20, 435-40 (1995).
- J. Reedijk, Inorg. Chim. Acta 198, 837-44 (1994).
- B.B. Ivanova, M.G. Arnaudov and P.R. Bontchev, Spectrochim. Acta 60A, 855-62 (2004).
- B.B. Ivanova and H. Mayer-Figge, J. Coord. Chem. 58, 653-59 (2005).
- B.B. Ivanova, J. Coord. Chem. 58, 587-93 (2005).
- B.B. Ivanova, M.G. Arnaudov and H. Mayer-Figge, Polyhedron 24, 1624-30 (2005).
- E. Colacio-Rodriguez, M.J. Salas-Peregrin, R. Lopez-Garzon and J.D. Lopez-Gonzalez, Thermochim. Acta. , 139-46 (1983).
- J. Michl and E.W. Thulstrup, “Spectroscopy with Polarized Light. Solute Alignment by Photoselec- tion, in Liquid Crystals, Polymers, and Membranes”, VCH Publishers, New York, 1986.
- E.W. Thulstrup and J.H. Eggers, Chem. Phys. Lett. 1, 690-92 (1968).
- B. Jordanov and B. Schrader, J. Mol. Struct. 347, 389-98 (1995).
- B. Jordanov, R. Nentchovska and B. Schrader, J. Mol. Struct. 297, 401-6 (1993).
- B. Kesimli, A. Topacli and C. Topacli, J. Mol. Struct. 645, 199-204 (2003).
- P. J.A. Ribeiro-Claro and A.M. Amado, Spectrochim. Acta 61A, 2796-97 (2005).
- S.C. Pinzaru, I. Pavel, N. Leopold and W. Kiefer, J. Raman Spectrosc. 35,338-46 (2004).
- B.B. Ivanova, Spectrochim. Acta, Part A (2006), in press.
- Z.-M Jin, L. Li, M.-L. Hu, H. Su and C.-X. Tong, Acta Cryst. E61, m1849-m51 (2005).
- Z. Talebpour, S. Mmaesum, M. Meraviand M. Shamsipur, Chem. Anal. 49, 369-71 (2004).
- Z. Talebpour, S. Mmaesum, M. Meraviand M. Shamsipur, Anal. Sciences 19, 1079-82 (2003).