Abstract for Structure and Photoluminescence of Ln(III) Aromatic N-oxides Metal Organic Frameworks
1. Structure and Photoluminescence of Ln(III) Aromatic N-oxides
Metal Organic Frameworks
Bowie Soon Ket Chong and Evan G. Moore.
School of Chemistry and MolecularBiosciences, University of Queensland, 4072, Australia.
Email: soon.chong@uqconnect.edu.au
Coordination Polymers (CP’s) (or Metal Organic Frameworks – MOF’s) are crystalline
materials constructed using the concepts of crystal engineering, based on a building block approach of
assembling discrete molecules into networks via metal coordination.[1]
These materials have been of
great interest due to their interesting structural features, magnetic and/or luminescent properties as
well as their potential applications in important industrial processes such as gas sorption, separation
and storage. Our research has been focused on the construction of lanthanide CP/MOF’s by
employing O-donor bridging ligands such as aromatic N-oxides, with trivalent lanthanide cations to
form materials with high dimensional and high connectivity.
While aromatic pyridyl ligands have been demonstrated to be very useful in constructing
CP/MOF’s with transition metal ions, the coordination chemistry of these ligands with lanthanide ions
have been rarely investigated.[1]
Due to their tendency to adopt higher coordination numbers and their
primarily ionic bonding, these metals can lead to unpredictable coordination geometries governed
predominantly by steric factors. In fact, aromatic N-oxide derivatives such as 2,2’-bipyridine-1,1’-
dioxide (2,2’-bpdo), 3,3’-bipyridne-1,1’-dioxide (3,3’-bpdo) and 4,4’-bipyridine-1,1’-dioxide (4,4’-
bpdo) have been found to form distinct metal organic frameworks.[2]
To explore this unique feature of
five-, six-, seven-, and eight-coordinate connectivity, we have expanded on the chemistry of these
materials utilising shorter and extended ligands such as 1,4-pyrazine-N,N’-dioxide (1,4-pzdo) and
3,3'-(1,4-phenylene)bis(pyridine-1-oxide) (3,3-phbpo) with a variety of different Ln(III) metals.
[1] H.L. Sun, S. Gao, B.Q. Ma,F. Chang, W.F. Fu, Micropor. Mesopor. Mat., 2004,73, 89-95.
[2] Sequeira, G. M., Tan. W. Y.,Moore, E. G., unpublished results
Figure 1: A series of different aromatic N-oxides ligands.
![Structure and Photoluminescence of Ln(III) Aromatic N-oxides
Metal Organic Frameworks
Bowie Soon Ket Chong and Evan G. Moore.
School of Chemistry and MolecularBiosciences, University of Queensland, 4072, Australia.
Email: soon.chong@uqconnect.edu.au
Coordination Polymers (CP’s) (or Metal Organic Frameworks – MOF’s) are crystalline
materials constructed using the concepts of crystal engineering, based on a building block approach of
assembling discrete molecules into networks via metal coordination.[1]
These materials have been of
great interest due to their interesting structural features, magnetic and/or luminescent properties as
well as their potential applications in important industrial processes such as gas sorption, separation
and storage. Our research has been focused on the construction of lanthanide CP/MOF’s by
employing O-donor bridging ligands such as aromatic N-oxides, with trivalent lanthanide cations to
form materials with high dimensional and high connectivity.
While aromatic pyridyl ligands have been demonstrated to be very useful in constructing
CP/MOF’s with transition metal ions, the coordination chemistry of these ligands with lanthanide ions
have been rarely investigated.[1]
Due to their tendency to adopt higher coordination numbers and their
primarily ionic bonding, these metals can lead to unpredictable coordination geometries governed
predominantly by steric factors. In fact, aromatic N-oxide derivatives such as 2,2’-bipyridine-1,1’-
dioxide (2,2’-bpdo), 3,3’-bipyridne-1,1’-dioxide (3,3’-bpdo) and 4,4’-bipyridine-1,1’-dioxide (4,4’-
bpdo) have been found to form distinct metal organic frameworks.[2]
To explore this unique feature of
five-, six-, seven-, and eight-coordinate connectivity, we have expanded on the chemistry of these
materials utilising shorter and extended ligands such as 1,4-pyrazine-N,N’-dioxide (1,4-pzdo) and
3,3'-(1,4-phenylene)bis(pyridine-1-oxide) (3,3-phbpo) with a variety of different Ln(III) metals.
[1] H.L. Sun, S. Gao, B.Q. Ma,F. Chang, W.F. Fu, Micropor. Mesopor. Mat., 2004,73, 89-95.
[2] Sequeira, G. M., Tan. W. Y.,Moore, E. G., unpublished results
Figure 1: A series of different aromatic N-oxides ligands.](https://image.slidesharecdn.com/0b0b1ebd-95cd-467b-bf27-e5003a61c0f8-150316163310-conversion-gate01/85/Abstract-for-Structure-and-Photoluminescence-of-Ln-III-Aromatic-N-oxides-Metal-Organic-Frameworks-1-320.jpg)
