Abstract
The complexation of a julolidine–quinoline based tridentate ligand with three oxo-metal ions, dioxovanadium(V), oxo-rhenium(V) and dioxo-uranium(VI), has been investigated with four new complexes being synthesised and structurally characterised. (VO2L)•2/3H2O (1) {HL (C22H21N3O) = ((E)-9-((quinolin-8- ylimino)methyl)-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-8-ol)} has a VO2L neutral mononuclear structure with a five-fold coordinated vanadium metal centre in a distorted trigonal bipyramidal geometry. (ReOL2)2(ReCl6)•7DMF (2) [DMF = dimethylformamide] exhibits a mixed valent rhenium complex with a (ReOL2)+ cationic unit in a distorted octahedral metal coordination geometry, charge balanced with (ReCl6)2 ̅ anions. [(UO2)L(H2O)2]2•2(NO3)•HL•4H2O (3) and [(UO2)L(CH3OH)2](NO3)•CH3OH (4) both have (UO2L)+ cationic mononuclear structures with either coordinated water or methanol molecules in pentagonal bipyramidal coordination geometries for the uranium metal centres. Intra-/intermolecular interactions including hydrogen bonding and π–π interactions are common and have been discussed. In addition, optical absorption and photoluminescence properties have been investigated.
Original language | English |
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Pages (from-to) | 75045-75053 |
Number of pages | 9 |
Journal | RSC Advances |
Volume | 6 |
DOIs | |
Publication status | Published - 2016 |
Keywords
- Schiff bases
- ligands