ISSN:
0044-2313
Keywords:
Metal dye complexes
;
curcumin and curcuminoides complexes of transition metals
;
organo transition metal compounds
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Metal Complexes of Dyes. IX. Transition Metal Complexes of Curcumin and DerivativesThe bidentate monoanions of curcumin[CU, (1, 7-bis(4-hydroxy-3-methoxyphenyl)-hepta-1,6-diene-3,5-dione)], diacetylcurcumin[DACU, (1,7-bis(4-acetyl-3-methoxyphenyl)-hepta-1,6-diene-3,5-dione)], dihydroxycurcumin[DHCU, (1,7-bis(4-hydroxiphenyl)-hepta-1,6-diene-3,5-dione)], dimethylcurcumin [DMCU, (1,7-bis(3,4-dimethoxyphenyl)-hepta-1, 6-diene-3,5-dione)] and trimethylcurcumin[TMCU, (1,7-bis(3,4-dimethoxyphenyl)-4-methylhepta-1,6-diene-3,5-dione)] form with chloro bridged complexes [(R3P)MCl2]2 (M=Pd, Pt; R=phenyl, n-butyl, ethyl, tolyl), [η5-C5Me5)MCl2]2 (M=Rh, Ir), [(η6-p-cymene)RuCl2]2, [(η3-C3H5)PdCl]2, di-μ-chlorobis[N-(diphenylmethylene)-glycinethylester-(C,N)]-dipalladium(II) and with [(η5-C5Me5)Co(CO)I2] monochelate dye complexes. The structure of [(η6-p-cymene)(Cl)Ru(DMCU)] was determined by X-ray diffraction. The dichelates (DMCU)2M with M=Cu, Ni, (CU)2Pd and the trichelate (CU)3Fe were obtained. Cationic bipyridine copper(II) complexes with CU, DHCU, and DMCU were sythesized by treating the dye ligands with copper(II) acetate, 2,2′-bipyridine and ammoniumtetrafluoroborate. In comparison to the free 1.3-diketones the dye complexes show a bathochromic shift in the UV/VIS spectra.
Notes:
Die zweizähnigen Monoanionen von Curcumin[CU, (1,7-bis(4-hydroxy-3-methoxyphenyl)-hepta-1,6-dien-3,5-dion)], Diacetylcurcumin[DACU, (1,7-bis(4-acetyl-3-methoxyphenyl)-hepta-1,6-dien-3,5-dion)], Dihydroxycurcumin[DHCU, (1,7-bis(4-hydroxiphenyl)-hepta-1,6-dien-3,5-dion)], Dimethylcurcumin[DMCU, (1,7-bis(3,4-dimethoxyphenyl)-hepta-1,6-dien-3,5-dion)] und Trimethylcurcumin[TMCU, (1,7-bis(3,4-dimethoxyphenyl)-4-methylhepta-1,6-dien-3,5-dion] bilden mit den chloroverbrückten Komplexen [(R3P)MCl2]2 (M=Pd, Pt; R=Phenyl, n-Butyl, Ethyl, Tolyl), [η5-C5Me5MCl2]2, M=Rh, Ir, [(η6-p-Cymol)RuCl2]2, [(η3-C3H5)PdCl]2, Di-μ-chlorobis[N-(diphenylmethylen)-glycinethylester-(C, N)]-dipalladium(II) sowie [(η5-C5Me5)Co(CO)I2] Monochelat-Komplexe. Die Struktur von [(η6-p-Cymol)(Cl)Ru(DMCU)] wurde röntgenographisch bestimmt. Die Bischelate der Form (DMCU)2M mit M=Cu, Ni, (CU)2Pd sowie ein Trischelat (CU)3Fe konnten erhalten werden. Kationische Bipyridinkupfer(II)-Komplexe mit CU, CHCU und DMCU bilden sich durch Umsetzung der Farbstoffliganden mit Kupfer(II)-acetat, 2,2′-Bipyridin und Ammoniumtetrafluoroborat. Eine Rotverschiebung der längstwelligen Absorptionsbande im UV/VIS Spektrum der Komplexe gegenüber den freien 1,3-Diketonen wird beobachtet.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19976230806
Permalink
