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Rare earth niobate coordination polymers

Journal Article · · Journal of Solid State Chemistry
 [1];  [2];  [3];  [4];  [5];  [3];  [2];  [3]
  1. Oregon State Univ., Corvallis, OR (United States). Dept. of Chemistry. Dept. of Physics
  2. Oregon State Univ., Corvallis, OR (United States). Dept. of Physics
  3. Oregon State Univ., Corvallis, OR (United States). Dept. of Chemistry
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Microsystem Integration Dept.
  5. Rigaku Oxford Diffraction, The Woodlands, TX (United States)
+ Show Author Affiliations

Rare-earth (RE) coordination polymers are infinitely tailorable to yield luminescent materials for various applications. In this paper we described the synthesis of a heterometallic rare-earth coordination compound ((CH3)2SO)3(RE)NbO(C2O4)3 ((CH3)2SO) = dimethylsulfoxide, DMSO, (C2O2 = oxalate), (RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb). The structure was obtained from single crystal X-ray diffraction of the La analogue. The Nb=O and DMSO terminal-bonding character guides assembly of an open framework structure with noncentrosymmetric RE-coordination geometry, and large spacing between the RE centers. A second structure was observed by PXRD for the smaller rare earths (Dy, Ho, Er, Yb); this structure has not yet been determined. The materials were further characterized using FTIR, and photoluminescence measurements. Characteristic excitation and emission transitions were observed for RE = Nd, Sm, Eu, and Tb. Quantum yield (QY) measurements were performed by exciting Eu and Tb analoges at 394 nm (QY 66%) and 464 nm (QY 71%) for Eu; and 370 nm (QY=40%) for Tb. Finally, we attribute the high QY and bright luminescence to two main structure-function properties of the system; namely the absence of water in the structure, and absence of concentration quenching.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Oregon State Univ., Corvallis, OR (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF) (United States)
Grant/Contract Number:
NA0003525
OSTI ID:
1421636
Alternate ID(s):
OSTI ID: 22893377
Report Number(s):
SAND2017--13471J; PII: S0022459617305224
Journal Information:
Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 259; ISSN 0022-4596
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Trapping of Nb V by {XW 9 O 33 } 9- (X = As, Sb): Formation of New Sandwich-Type POM Complexes and Their Solution Behavior : Trapping of Nb journal May 2019
Crystal structure of poly[tetraaqua-(μ4-oxalato-κ4O,O′:O′′,O′′′)-(μ8-benzene-1,2,4,5-tetracarboxylato-κ8O1:O2:O3:O4:O5:O6:O7:O8)yttrium(III)], C6H5O8Y journal July 2018

Figures / Tables (14)

Table 1.(p. 8)table Table 1.
Figure 1.(p. 9)figure Figure 1.
Figure 2.(p. 10)figure Figure 2.
Figure 3.(p. 11)figure Figure 3.
Figure 4.(p. 12)figure Figure 4.
Figure 5.(p. 13)figure Figure 5.
Figure 6.(p. 14)figure Figure 6.
Figure 7.(p. 15)figure Figure 7.
Figure 8.(p. 16)figure Figure 8.
Figure 9.(p. 17)figure Figure 9.
Figure 10.(p. 18)figure Figure 10.
Figure 11.(p. 19)figure Figure 11.
Figure 12.(p. 21)figure Figure 12.
Figure 13.(p. 21)figure Figure 13.

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
coordination polymers
europium
lanthanides
luminescence
rare earths
terbium