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New ligands in the 2,2'-dipyridylamine series and their Re(I) complexes; synthesis, structures and luminescence properties
- Source :
- New journal of chemistry (1987) 28 (2004): 398–405. doi:10.1039/b312647a, info:cnr-pdr/source/autori:N. M. Shavaleev; A. Barbieri; Z. R. Bell; M. D. Ward; F. Barigelletti/titolo:New ligands in the 2,2'-dipyridylamine series and their Re(I) complexes; synthesis, structures and luminescence properties/doi:10.1039%2Fb312647a/rivista:New journal of chemistry (1987)/anno:2004/pagina_da:398/pagina_a:405/intervallo_pagine:398–405/volume:28
- Publication Year :
- 2004
- Publisher :
- [Centre national de la recherche scientifique] ;, Paris , Regno Unito, 2004.
-
Abstract
- A series of new derivatives of the di(2-pyridyl) amine ligand has been prepared, having the general formula (py)(2)NR, where R is one of a wide range of groups including naphthyl, pyrenyl, benzo-18-crown-6, pyrenyl, oxazolyl and bromo-biphenyl. All ligands are luminescent, with emission maxima between 370 and 520 nm, and with quantum yields in fluid solution of up to 0.74. Reaction of these ligands with Re(CO)(5)Cl afforded complexes of the type [Re(CO)(3)ClL] in which the di(2-pyridyl) amine ligand binds as an N,N-bidentate chelate via the two pyridyl units; five such complexes have been structurally characterised. With one exception the complexes are essentially non-luminescent, which we ascribe to the energetic availability of metal-based d-d excited states which can quench any MLCT or ligand-centred excited states. The exception is [Re(CO)(3)Cl(tppd)] [where tppd = N, N, N,, N'-tetrakis(2-pyridyl)-p-phenylenediamine] in which one di(2-pyridyl) amine site is occupied by a {Re(CO)(3)Cl} unit but the other is vacant; this luminesces in fluid solution at 516 nm (phi = 0.04, tau = 42 ns).
- Subjects :
- TRANSITION-METAL-COMPLEXES
EXCITED-STATE PROPERTIES
CHARGE-TRANSFER EMISSION
CRYSTAL-STRUCTURE
DIIMINE COMPLEXES
PHOTOPHYSICAL PROPERTIES
SPECTROSCOPIC CHARACTERIZATION
RUTHENIUM(II) COMPLEXES
ELECTRONIC-PROPERTIES
COORDINATION POLYMER
Chemistry
Stereochemistry
General Chemistry
Catalysis
Amine ligands
Metal
Crystallography
Fluid solution
Excited state
visual_art
Materials Chemistry
visual_art.visual_art_medium
Chelation
Amine gas treating
Luminescence
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- New journal of chemistry (1987) 28 (2004): 398–405. doi:10.1039/b312647a, info:cnr-pdr/source/autori:N. M. Shavaleev; A. Barbieri; Z. R. Bell; M. D. Ward; F. Barigelletti/titolo:New ligands in the 2,2'-dipyridylamine series and their Re(I) complexes; synthesis, structures and luminescence properties/doi:10.1039%2Fb312647a/rivista:New journal of chemistry (1987)/anno:2004/pagina_da:398/pagina_a:405/intervallo_pagine:398–405/volume:28
- Accession number :
- edsair.doi.dedup.....76ef4d094ea9c389c25a58eb4f8ad908