Naslov
EPR study of copper complexes with nucleic-acid basis

Autori
Bešić, Erim ; Sanković, Krešimir ; Herak, Janko ; Krilov Dubravka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
1ST Croatian Congress on Molecular Life Sciences, Opatija / - , 2002, 121-121

Skup
1ST Croatian Congress on Molecular Life Sciences, Opatija

Mjesto i datum
Opatija, Hrvatska, 09.06.2002. - 13.06.2002

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
EPR spectroscopy; free radicals; copper

Sažetak
EPR spectroscopy was used to study the complex formed in crystals of 5-methyl-2-thiouracil (2-thiothymine) containing traces of copper. The copper impurities, originally present as Cu(I)-complex of 2-thiothymine in the lattice of 2-thiothymine, are transformed into paramagnetic Cu(II)-complex by ionizing radiation. It was found that the complex is planar, the plane being defined by two pairs of S and N atoms, from two adjacent 2-thiothymine molecules. The structure of the complex suggests that a pair of hydrogen bonds between two neighboring molecules is replaced by a stronger Cu-coordination bonding, with two sulfur and two nitrogen atoms as ligands. The spectroscopic parameters (g-tensor, A(63Cu) and A(14N) tensors) are essentially similar to those earlier observed for copper planar centers in other systems. © 2004 Elsevier B.V. All rights reserved.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA