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Titolo:
X-RAY-SCATTERING STUDY ON AMORPHOUS, POLYNUCLEAR PLATINUM URIDINE COMPLEXES
Autore:
SERIMAA R; VAHVASELKA S; LAITALAINEN T; PAAKKARI T; OKSANEN A;
Indirizzi:
UNIV HELSINKI,DEPT PHYS,SILTAVUORENPENGER 20D SF-00170 HELSINKI 17 FINLAND UNIV HELSINKI,DEPT PHYS,SILTAVUORENPENGER 20D SF-00170 HELSINKI 17 FINLAND UNIV HELSINKI,DEPT CHEM SF-00100 HELSINKI 10 FINLAND
Titolo Testata:
Journal of the American Chemical Society
fascicolo: 22, volume: 115, anno: 1993,
pagine: 10036 - 10041
SICI:
0002-7863(1993)115:22<10036:XSOAPP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRIDGING ALPHA-PYRIDONATE; PYRIMIDINE GREENS; CRYSTAL-STRUCTURE; BLUES; LIGANDS; ANALOG; OXIDATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
R. Serimaa et al., "X-RAY-SCATTERING STUDY ON AMORPHOUS, POLYNUCLEAR PLATINUM URIDINE COMPLEXES", Journal of the American Chemical Society, 115(22), 1993, pp. 10036-10041

Abstract

The structures of amorphous, polynuclear platinum uridine complexes Pt-green 1 and 2, Pt-violet 3, Pt-blue 4, and Pt-black 5 were studied by wide and small angle X-ray scattering methods (WAXS and SAXS) both as solids and in H2O solution. The results of WAXS experiments showed differences in the degree of order between 1-5 in the solid state. The radical distribution functions (RDFs) for Pt complexes 1-5 from WAXS are in accord with a tetranuclear chainlike Pt structure in the solid state on the basis of the results of model calculations. The shortest average Pt-Pt distances varied from 3.00 to 3.08 angstrom for 1-5, respectively. The Pt-N and Pt-O distances were 2.00-2.08 angstrom, and thecorresponding coordination numbers were 4.5, 4.8, 4.5, 3.8, and 4.3 for 1-5, respectively. The radii of gyration of 1-5 in H2O solution (14mg/mL) from SAXS analysis were 5, 4, 4, 9, and 7 angstrom, respectively. Pt-green 2 and Pt-violet 3 were found to exist rather as discrete dinuclear Pt units than as tetranuclear Pt units in H2O solution. The double sizes of Pt-blue 4 and Pt-black 5 are interpreted as indicatingthe aggregates of the dinuclear Pt units.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:44:07