Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/25925
Title: RUTHENIUM PYRIDYL-CARBOXYLATE METALLOLIGANDS AND HETEROMETALLIC ASSEMBLIES
Authors: WANG JING
Keywords: metalloligand, heterometallic, ruthenium, dual functionality, pyridyl, carboxylate
Issue Date: 7-Jan-2011
Source: WANG JING (2011-01-07). RUTHENIUM PYRIDYL-CARBOXYLATE METALLOLIGANDS AND HETEROMETALLIC ASSEMBLIES. ScholarBank@NUS Repository.
Abstract: Two types of ruthenium(II) pyridyl-carboxylate metalloligands with different pendants were synthesized: [Ru(dppm)2(eta2-O2C¿R¿C5H4N)](OTf) type with pyridine pendants & [RuCl2(dppb)(NC5H4¿R¿COOH)2] type with carboxylic acid pendants. Complementary hydrogen bonding formed between neighboring nicotinic acids in [RuCl2(dppb)(NC5H4¿m-COOH)2] helps to link the molecules into a one-dimensional zigzag chain. Polar and apolar channels are formed by stacking the adjacent chains and they selectively wrap up THF and hexane, respectively. The metalloligand potentials of [Ru(dppm)2(eta2-O2C¿R¿C5H4N)](OTf) were evidenced by reacting them with Lewis acidic MCl2(CH3CN)2 (M = Pd, Pt) or AgOTf to afford heterotrimetallic complexes {[Ru(dppm)2(eta2-O2C¿R¿C5H4N)]2[MCl2]}(OTf)2 (M = Pd, R = -, CH2, C2H2, C6H4; M = Pt, R = -), {[Ru(dppm)2(eta2-O2C¿m-C5H4N)]2[PdCl2]}(OTf)2 and {[Ru(dppm)2(eta2-O2CC5H4N)]2Ag}(OTf)3. The electrochemical properties of both the metalloligands and heterometallic complexes were investigated by Cyclic Voltammetry. Coordination of the metalloligands has greatly improved the reversibility of the redox process and the oxidation potentials of RuII/III.
URI: http://scholarbank.nus.edu.sg/handle/10635/25925
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