OCTAHEDRAL METAL CLUSTERS AS MOLECULAR BUILDING BLOCKS OF COORDINATION POLYMERS: SYNTHESIS, CHARACTERIZATION, AND STUDY OF THEIR HOST-GUEST INTERACTIONS

This dissertation work focuses on the use of cyanide-functionalized paramagnetic cluster [(Ta6Cl12i)(CN)12a]3- with valence electron per cluster (VEC) = 15 as molecular building blocks of coordination polymers. Apical cyanide ligands are used as bridging ligands between the cluster and other molecular building blocks for the preparation of supramolecular assemblies with different dimensions. Using the self-assembly approach, eight new compounds were synthesized and their crystal structures have been determined from sing crystal X-ray diffraction. Two salts [La(DMF)(MeOH)1.5(H2O)0.5Ta6Cl12(CN)6]*DMF (1) and Sm(H2O)2(DMF)Ta6Cl12(CN)6 (2) were synthesized using the anion [Ta6Cl12(CN)6]3- and solutions of La3+ and Sm3+. Both 1 and 2 precipitated quickly due to extremely low solubility of the products in the solvent system used, thus the products lacked crystallinity. The introduction of bridging ligand 4,4'-dipyridyl N,N'-dioxide (dpdo) enabled the formation of three extended frameworks [Eu(dpdo)(H2O)5(EtOH)2] [Ta6Cl12(CN)6]*dpdo*H2O* 4MeOH (3),

Grantor dc:publisher

Wake Forest University

Year dc:date.issued

2011

Author dc:creator

• CHEN, LEI

• COORDINATION POLYMERS

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/10339/36433

OAI identifier oai:identifier

oai:wakespace.lib.wfu.edu:10339/36433