In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 51, No. 22 ( 2022), p. 8885-8892
Abstract:
Three new hybrid organic–inorganic frameworks employing octacyanidometallates and 4,4′-bypiridine dioxide (4,4′-bpdo) as bridging molecules were prepared and characterized. The three-dimensional coordination frameworks {[Fe II (μ-4,4′-bpdo)(H 2 O) 2 ] 2 [M IV (CN) 8 ]·9H 2 O} n (Fe2Mo, Fe2W and Fe2Nb; M = Mo, W and Nb) are composed of cyanido-bridged chains, which are interconnected by the organic linkers. Magnetic measurements for Fe2Nb show a two-step transition to the antiferromagnetic state, which results from the cooperation of antiferromagnetic intra- and inter-chain interactions. Fe2Mo and Fe2W, on the other hand, behave as paramagnets at 2 K because of the diamagnetic character of the corresponding octacyanidometallate( iv ) building units. However, after 450 nm light irradiation they show transition to the metastable high spin Mo IV or W IV states, respectively, with distinct ferromagnetic intrachain spin interactions, as opposed to the antiferromagnetic ones observed in the Fe2Nb framework.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
1472887-4