In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2021, No. 16 ( 2021-04-26), p. 1565-1570
Abstract:
Dianthracene ligands obtained through photocycloaddition reaction can undergo de‐dimerization upon heating. Here we report the first examples of lanthanide‐dianthracene coordination polymers with chain structures, namely, [LnL(depma 2 )]Br ⋅ xH 2 O [ 1‐Ln , Ln=Dy (x=5), Gd (x=4); H 2 L= N 1 , N 3 ‐bis(salicylideneimino)diethylenetriamine, depma 2 =photodimerized 9‐diethylphosphonomethylanthracene]. The lanthanide ions possess pseudo‐ D 5h geometries with five equatorial positions occupied by three N and two O atoms from L 2− and two axial positions by the phosphonate oxygen atoms from bridging depma 2 ligands. Thermo‐induced structural transformation is observed for both compounds between 120 and 140 °C, which involves de‐dimerization of depma 2 and elimination of bromoethane. The structural transformation is accompanied with the switch‐on of photoluminescence and, in the case of 1‐Dy , also changes of magnetic dynamics.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2021.16
DOI:
10.1002/ejic.202100138
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
1475009-0