abstract
The complex [Ru([9]aneS(3))(bpy)Cl]Cl (bpy = 2,2'-bipyridine) was immobilised in plain beta-cyclodextrin (beta-CD) and permethylated beta-CD (TRIMEB) to yield two adducts with a 1: 1 host: guest stoichiometry. The adducts were studied by powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), (13)C{(1)H} CP/MAS NMR and vibrational spectroscopy (FT-IR and Raman). Results support the formation of stable supramolecular adducts with a proposed geometry in which the coordinated bypiridine fragment of the guest is partially included in the host cavities, and the bulky [9] aneS(3) fragment protrudes out to the interstitial spaces. A packing mode is proposed for [Ru([9]aneS(3))(bpy)Cl]Cl. TRIMEB, obtained by Monte Carlo optimisation of the XRD data. TRIMEB molecules are stacked in tilted channels, with the voluminous part of the guest molecules in the inter-channel space. The behaviour of [Ru([9]aneS(3))(bpy)Cl] Cl upon CD encapsulation and the chloride ligand hydrolysis process in solution for all compounds were studied in detail by Raman spectroscopy. (C) 2008 Elsevier B. V. All rights reserved.
keywords
PERMETHYLATED BETA-CYCLODEXTRIN; MOLYBDENOCENE DICHLORIDE CP2MOCL2; METAL-CARBONYL-COMPLEXES; C-13 CHEMICAL-SHIFTS; INCLUSION-COMPOUNDS; POWDER DIFFRACTION; CRYSTAL-STRUCTURES; DICHOTOMY METHOD; EPOXIDATION; CHEMISTRY
subject category
Chemistry
authors
Marques, J; Anjo, L; Marques, MPM; Santos, TM; Paz, FAA; Braga, SS
our authors
Filipe Alexandre Almeida Paz
Principal Researcher
