Emergence of californium as the second transitional element in the actinide series.

Autor:	Cary SK; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Vasiliu M; Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, USA., Baumbach RE; National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA., Stritzinger JT; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Green TD; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Diefenbach K; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Cross JN; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Knappenberger KL; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Liu G; Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA., Silver MA; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., DePrince AE; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Polinski MJ; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Van Cleve SM; Nuclear Materials Processing Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA., House JH; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Kikugawa N; National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan., Gallagher A; National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA., Arico AA; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA., Dixon DA; Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, USA., Albrecht-Schmitt TE; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2015 Apr 16; Vol. 6, pp. 6827. Date of Electronic Publication: 2015 Apr 16.
DOI:	10.1038/ncomms7827
Abstrakt:	A break in periodicity occurs in the actinide series between plutonium and americium as the result of the localization of 5f electrons. The subsequent chemistry of later actinides is thought to closely parallel lanthanides in that bonding is expected to be ionic and complexation should not substantially alter the electronic structure of the metal ions. Here we demonstrate that ligation of californium(III) by a pyridine derivative results in significant deviations in the properties of the resultant complex with respect to that predicted for the free ion. We expand on this by characterizing the americium and curium analogues for comparison, and show that these pronounced effects result from a second transition in periodicity in the actinide series that occurs, in part, because of the stabilization of the divalent oxidation state. The metastability of californium(II) is responsible for many of the unusual properties of californium including the green photoluminescence.
Databáze:	MEDLINE
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