Synthesis and structural characterisation of luminescent di- and tri-nuclear palladium(II) acetylide complexes as building blocks for metallodendrimers
Vww. Yam et al., Synthesis and structural characterisation of luminescent di- and tri-nuclear palladium(II) acetylide complexes as building blocks for metallodendrimers, J CHEM S DA, (7), 2001, pp. 1111-1116
Citations number
58
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
The reaction of the starting complex trans-Pd(PEt3)(2)Cl-2 with branched al
kynyl ligands, 1,3,5-triethynylbenzene (L1) and 1,3-diethynyl-5-triisopropy
lsilylethynylbenzene (L2), in the presence of HNEt2 and copper(I) catalyst
led to formation of the respective luminescent branched acetylide complexes
, 1,3,5-[Cl(Et3P)(2)PdC=C](3)C6H3 1 and 1,3-[Cl(Et3P)(2)PdC=C](2)-5-[(Pr-i)
(3)SiC=C]C6H3 2, which can serve as building blocks for the construction of
metallodendrimers either by a divergent or a convergent approach. Photophy
sical studies of these complexes showed the di- and tri-nuclear palladium c
omplexes 1 and 2 are emissive in EtOH-MeOH (4:1, v/v) glass at low temperat
ure. Synthesis of the first generation metallodendrimers using 1 as a build
ing block has also been attempted and shows promising results.