In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2017, No. 10 ( 2017-03-10), p. 1355-1363
Abstract:
Several lanthanide bis(salicylato)borate (BSBs) compounds were synthesized from anhydrous lanthanide chlorides and pyridine (py). The reactions start with the formation of small complexes, as indicated by [ErCl 2 (py) 4 (BSB)], on to 1D polymers 1 ∞ [Ln(BSB) 3 (py) 2 ] (Ln = Y, La–Nd, Sm) with a reduced py content. As the lanthanide radii contract along the lanthanide (Ln) series, the formation of 2D networks of the constitution 2 ∞ [Ln(BSB) 3 (py)] (Ln = Sm, Eu, Tb, Dy, Er) is observed with the further release of py. The coordination polymers exhibit intense photoluminescence from the UV to the near‐infrared (NIR) region through lanthanide‐specific 4f–4f emission for the Nd 3+ , Sm 3+ , Eu 3+ , Tb 3+ , and Dy 3+ species. The emission is remarkable for the Dy 3+ (yellow‐white) and Nd 3+ (NIR) species owing to the sensitizer effects of the [BSB] – anion, which shows energy transfer to most Ln ions. For the Ce 3+ species, the participation of 5d states is observed and produces parity‐allowed broadband 5d–4f emission. The bis(salicylato)borate ligand shows fluorescence in the UV with a short lifetime of only 2 ns, which makes the energy transfer in the other Ln compounds remarkable and marks it as versatile sensitizer for these metal ions.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2017.10
DOI:
10.1002/ejic.201601512
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
1475009-0
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