Sabina Grabner (Avtor), Barbara Modec (Avtor)

Povzetek

Two novel zinc(II) compounds with curcuminate (abbreviated as cur$^−$), [Zn(CH$_3$COO) (cur)(bpy)](1)·CH$_3$OH·2H$_2$O (bpy = 2,2′-bipyridine) and [Zn(PhCOO)(cur)(bpy)] (2)·CH$_3$OH, have been synthesized and characterized. Their composition has been determined by single-crystal X-ray structure analysis. Complexes 1 and 2 are similar: in both a five-fold coordination environment of zinc(II) consists of a monodentate carboxylate, a chelating bidentate 2,2′-bipyridine, and curcuminate, which is bound via a deprotonated 1,3-dione moiety. In 1, 2,2′-bipyridine nitrogen atoms and curcuminate oxygen atoms form the base of a square pyramid, whereas the acetate oxygen occupies its apex. The O$_3$N$_2$ donor set in 2 defines a polyhedron which more closely resembles a trigonal bipyramid. The packing in the crystal lattices of both compounds is governed by hydrogen-bonds. Complexes 1 and 2 display higher stability than curcumin in buffered media at pH = 7.0, however, the degradation of coordinated cur$^−$ is comparable to that of yellow pigment curcumin (curH) when the pH is raised to 7.2. Both complexes 1 and 2 in DMSO exhibit fluorescence with Stokes shifts of 5367 and 4634 cm$^{−1}$, respectively.

Ključne besede

kurkumin;cink;Zn(II) kompleksi;stabilnost;kristalne strukture;curcumin;Zn(II) complexes;stability;crystal structures;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 546.47:547.979.4
COBISS: 1538287299 Povezava se bo odprla v novem oknu
ISSN: 1420-3049
Št. ogledov: 153
Št. prenosov: 56
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: kurkumin;cink;Zn(II) kompleksi;stabilnost;kristalne strukture;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-20
Letnik: ǂVol. ǂ24
Zvezek: ǂiss. ǂ14
Čas izdaje: Jul. 2019
DOI: 10.3390/molecules24142540
ID: 13815879