From tetranuclear to pentanuclear [Co-Ln] (Ln = Gd, Tb, Dy, Ho) complexes across the lanthanide series: effect of varying sequence of ligand addition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F21%3APU142023" target="_blank" >RIV/00216305:26620/21:PU142023 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/21:73609445
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT02038B" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT02038B</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d1dt02038b" target="_blank" >10.1039/d1dt02038b</a>
Alternative languages
Result language
angličtina
Original language name
From tetranuclear to pentanuclear [Co-Ln] (Ln = Gd, Tb, Dy, Ho) complexes across the lanthanide series: effect of varying sequence of ligand addition
Original language description
Two new families of cobalt(II/III)-lanthanide(III) coordination aggregates have been reported: tetranuclear [Ln(2)(III)Co(2)(III)L(2)(N-BuDEA)(2)(O2CCMe3)(4)(H2O)(2)]center dot(MeOH)(n)center dot(H2O)(m) (Ln = Gd, 1; Tb, 2; Dy, 3; n=2, m=10 for 1 and 2; n=6, m=2 for 3) and pentanuclear Ln(2)(III)Co(II)Co(2)(III)L(2)(N-BuDEA)(2)(O2CCMe3)(6)(MeOH)(2) (Ln = Dy, 4; Ho, 5) formed from the reaction of two aggregation assisting ligands H2L (o-vanillin oxime) and N-BuDEAH(2) (N-butyldiethanolamine). A change in preference from a lower to higher nuclearity structure was observed on going across the lanthanide series brought about by the variation in the size of the Ln(III) ions. An interesting observation was made for the varying sequence of addition of the ligands into the reaction medium paving the way to access both structural types for Ln = Dy. HRMS (+ve) of solutions gave further insight into the formation of the aggregates via different pathways. The tetranuclear complexes adopt a modified butterfly structure with a more complex bridging network while trapping of an extra Co-II ion in the pentanuclear complexes destroys this arrangement putting the Co-Co-Co axis above the Ln-Ln axis. Direct current (dc) magnetic susceptibility measurements reveal weak antiferromagnetic coupling in 1. Complexes 2 and 5 display no slow magnetic relaxation, whereas complexes 3 and 4 display out-of-phase signals at low temperature in ac susceptibility measurements. All compounds were analyzed with DFT and CASSCF calculations and informations about the single-ion anisotropies and mutual 4f-4f/4f-3d magnetic interactions were derived.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Dalton Transactions
ISSN
1477-9226
e-ISSN
1477-9234
Volume of the periodical
50
Issue of the periodical within the volume
34
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
11861-11877
UT code for WoS article
000683050100001
EID of the result in the Scopus database
2-s2.0-85114184547