A new three-dimensional lanthanide framework constructed by oxalate and 3, 5-pyridinedicarboxylate

Michael A. Lawandy; Long Pan; Xiaoying Huang; Jing Li; Tan Yuen; C. L. Lin

A new three-dimensional lanthanide framework constructed by oxalate and 3, 5-pyridinedicarboxylate

Michael A. Lawandy, Long Pan, Xiaoying Huang, Jing Li, Tan Yuen, C. L. Lin

Rutgers University

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Abstract

Hydrothermal reactions of rare-earth metal acetates and nitrates with oxalic acid (H₂C₂O₄) and 3, 5-pyridinedicarboxylic acid (H₂pddc) in triethylamine/water solutions have yielded five isostructural polymers with the general formula: [Ln(pddc)(C₂O₄)_1/2(H₂O)₂] ·H₂O. [Ln = La(1), Pr(2), Nd(3), Eu(4) and Er(5)]. These compounds crystallize in monoclinic crystal system, space group P2_1/n, Z = 4, with only slight variations in their unit cell parameters: 1 a = 7.747(2), b = 9.954(2), c = 15.134(3) Å, β = 98.64(3)°, V= 1153.8(4) Å³; 2 a = 7.707(2), b = 9.895(2), c = 15.006(3) Å, β = 98.54(3)°, V = 1131.7(4) Å³; 3 a = 7.688(2), b = 9.897(2), c = 14.955(3) Å, β = 98.43(3)°, V = 112 5.6(4) Å³; 4 a = 7.638(2), b = 9.842(2), c = 14.809(3) Å, β = 98.42(3)°, V = 1101.2(4) Å³; 5 a = 7.573(2), b = 9.761(2) Å, c = 14.630(3) Å, β = 98.10(3)°, V= 1070.7(4) Å³. The structure of these compounds is composed of 2D Ln(pddc) layers that are interconnected by chelating oxalate. Within the layer, each rare-earth metal forms a monodentate bond with each of the four pddc groups. The metal centers in the neighboring layers are bridged through μ₄-oxalate, resulting in a three-dimensional framework. The remaining two sites around the eight-coordinate Ln are occupied by water molecules. Compounds 2, 3, and 5 exhibit paramagnetic behavior and 1 is diamagnetic. They are thermally stable up to 250°C.

Original language	English
Pages (from-to)	GG6121-GG6126
Journal	Materials Research Society Symposium - Proceedings
Volume	658
Publication status	Published - Jan 1 2001

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Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Lawandy, M. A., Pan, L., Huang, X., Li, J., Yuen, T., & Lin, C. L. (2001). A new three-dimensional lanthanide framework constructed by oxalate and 3, 5-pyridinedicarboxylate. Materials Research Society Symposium - Proceedings, 658, GG6121-GG6126.

@article{8cd9a6434cb748d4b7d837e7b15a9b0a,

title = "A new three-dimensional lanthanide framework constructed by oxalate and 3, 5-pyridinedicarboxylate",

abstract = "Hydrothermal reactions of rare-earth metal acetates and nitrates with oxalic acid (H2C2O4) and 3, 5-pyridinedicarboxylic acid (H2pddc) in triethylamine/water solutions have yielded five isostructural polymers with the general formula: [Ln(pddc)(C2O4)1/2(H2O)2] ·H2O. [Ln = La(1), Pr(2), Nd(3), Eu(4) and Er(5)]. These compounds crystallize in monoclinic crystal system, space group P21/n, Z = 4, with only slight variations in their unit cell parameters: 1 a = 7.747(2), b = 9.954(2), c = 15.134(3) {\AA}, β = 98.64(3)°, V= 1153.8(4) {\AA}3; 2 a = 7.707(2), b = 9.895(2), c = 15.006(3) {\AA}, β = 98.54(3)°, V = 1131.7(4) {\AA}3; 3 a = 7.688(2), b = 9.897(2), c = 14.955(3) {\AA}, β = 98.43(3)°, V = 112 5.6(4) {\AA}3; 4 a = 7.638(2), b = 9.842(2), c = 14.809(3) {\AA}, β = 98.42(3)°, V = 1101.2(4) {\AA}3; 5 a = 7.573(2), b = 9.761(2) {\AA}, c = 14.630(3) {\AA}, β = 98.10(3)°, V= 1070.7(4) {\AA}3. The structure of these compounds is composed of 2D Ln(pddc) layers that are interconnected by chelating oxalate. Within the layer, each rare-earth metal forms a monodentate bond with each of the four pddc groups. The metal centers in the neighboring layers are bridged through μ4-oxalate, resulting in a three-dimensional framework. The remaining two sites around the eight-coordinate Ln are occupied by water molecules. Compounds 2, 3, and 5 exhibit paramagnetic behavior and 1 is diamagnetic. They are thermally stable up to 250°C.",

author = "Lawandy, {Michael A.} and Long Pan and Xiaoying Huang and Jing Li and Tan Yuen and Lin, {C. L.}",

year = "2001",

month = jan

day = "1",

language = "English",

volume = "658",

pages = "GG6121--GG6126",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

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TY - JOUR

T1 - A new three-dimensional lanthanide framework constructed by oxalate and 3, 5-pyridinedicarboxylate

AU - Lawandy, Michael A.

AU - Pan, Long

AU - Huang, Xiaoying

AU - Li, Jing

AU - Yuen, Tan

AU - Lin, C. L.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Hydrothermal reactions of rare-earth metal acetates and nitrates with oxalic acid (H2C2O4) and 3, 5-pyridinedicarboxylic acid (H2pddc) in triethylamine/water solutions have yielded five isostructural polymers with the general formula: [Ln(pddc)(C2O4)1/2(H2O)2] ·H2O. [Ln = La(1), Pr(2), Nd(3), Eu(4) and Er(5)]. These compounds crystallize in monoclinic crystal system, space group P21/n, Z = 4, with only slight variations in their unit cell parameters: 1 a = 7.747(2), b = 9.954(2), c = 15.134(3) Å, β = 98.64(3)°, V= 1153.8(4) Å3; 2 a = 7.707(2), b = 9.895(2), c = 15.006(3) Å, β = 98.54(3)°, V = 1131.7(4) Å3; 3 a = 7.688(2), b = 9.897(2), c = 14.955(3) Å, β = 98.43(3)°, V = 112 5.6(4) Å3; 4 a = 7.638(2), b = 9.842(2), c = 14.809(3) Å, β = 98.42(3)°, V = 1101.2(4) Å3; 5 a = 7.573(2), b = 9.761(2) Å, c = 14.630(3) Å, β = 98.10(3)°, V= 1070.7(4) Å3. The structure of these compounds is composed of 2D Ln(pddc) layers that are interconnected by chelating oxalate. Within the layer, each rare-earth metal forms a monodentate bond with each of the four pddc groups. The metal centers in the neighboring layers are bridged through μ4-oxalate, resulting in a three-dimensional framework. The remaining two sites around the eight-coordinate Ln are occupied by water molecules. Compounds 2, 3, and 5 exhibit paramagnetic behavior and 1 is diamagnetic. They are thermally stable up to 250°C.

AB - Hydrothermal reactions of rare-earth metal acetates and nitrates with oxalic acid (H2C2O4) and 3, 5-pyridinedicarboxylic acid (H2pddc) in triethylamine/water solutions have yielded five isostructural polymers with the general formula: [Ln(pddc)(C2O4)1/2(H2O)2] ·H2O. [Ln = La(1), Pr(2), Nd(3), Eu(4) and Er(5)]. These compounds crystallize in monoclinic crystal system, space group P21/n, Z = 4, with only slight variations in their unit cell parameters: 1 a = 7.747(2), b = 9.954(2), c = 15.134(3) Å, β = 98.64(3)°, V= 1153.8(4) Å3; 2 a = 7.707(2), b = 9.895(2), c = 15.006(3) Å, β = 98.54(3)°, V = 1131.7(4) Å3; 3 a = 7.688(2), b = 9.897(2), c = 14.955(3) Å, β = 98.43(3)°, V = 112 5.6(4) Å3; 4 a = 7.638(2), b = 9.842(2), c = 14.809(3) Å, β = 98.42(3)°, V = 1101.2(4) Å3; 5 a = 7.573(2), b = 9.761(2) Å, c = 14.630(3) Å, β = 98.10(3)°, V= 1070.7(4) Å3. The structure of these compounds is composed of 2D Ln(pddc) layers that are interconnected by chelating oxalate. Within the layer, each rare-earth metal forms a monodentate bond with each of the four pddc groups. The metal centers in the neighboring layers are bridged through μ4-oxalate, resulting in a three-dimensional framework. The remaining two sites around the eight-coordinate Ln are occupied by water molecules. Compounds 2, 3, and 5 exhibit paramagnetic behavior and 1 is diamagnetic. They are thermally stable up to 250°C.

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A new three-dimensional lanthanide framework constructed by oxalate and 3, 5-pyridinedicarboxylate

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