title: Multi-pyridine decorated Fe(II) and Ru(II) complexes by Pd(0)-catalysed cross couplings: new building blocks for metallosupramolecular assemblies.
abstract: Eight metal complexes of the type [M(tpy)2](2+) (tpy = 2,2':6',2''-terpyridine) featuring four pendant pyridine rings are reported and characterised by NMR, MS, absorption spectroscopy and electrochemical methods. Palladium-mediated Suzuki and Sonogashira cross-coupling reactions were performed on both free 4'-(3,5-dibromophenyl)-tpy and its Ru(II) complex in good yields. The ready N-alkylation of the pendant pyridyl units has significant influence on the absorption and electrochemical reduction of the complexes, processes which are localised on the periphery and leaves the [Ru(tpy)2](2+) core essentially unaffected. The binding of metal ions by the free pyridines is also demonstrated as means of assembling larger ordered non-covalent structures.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
authors.forename: Jiajia
authors.initials: J
authors.lastname: Yang
authors.forename: Jack K
authors.initials: JK
authors.lastname: Clegg
authors.forename: Qibai
authors.initials: Q
authors.lastname: Jiang
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Lui
authors.forename: Hong
authors.initials: H
authors.lastname: Yan
authors.forename: Wei
authors.initials: W
authors.lastname: Zhong
authors.forename: Jonathon E
authors.initials: JE
authors.lastname: Beves