Zn(II) curcuminate complexes with 2,2'-bipyridine and carboxylates

Grabner, Sabina (avtor), Modec, Barbara (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: curcumin, Zn(II) complexes, stability, crystal structures
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2019
• Št. strani: 20 str.
• Številčenje: Vol. 24, iss. 14, art. 2540
• PID: 20.500.12556/RUL-132833
• UDK: 546.47:547.979.4
• ISSN pri članku: 1420-3049
• DOI: 10.3390/molecules24142540
• COBISS.SI-ID: 1538287299
• Datum objave v RUL: 04.11.2021

Gradivo je del revije

• Naslov: Molecules
• Skrajšan naslov: Molecules
• Založnik: MDPI
• ISSN: 1420-3049
• COBISS.SI-ID: 18462981

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 11.07.2019

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kurkumin, cink, Zn(II) kompleksi, stabilnost, kristalne strukture

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0134
• Naslov: Kemija za trajnostni razvoj