Details

Autor(en) / Beteiligte

• Pollock, J. Bryant
• Schneider, Gregory L
• Cook, Timothy R
• Davies, Andrew S
• Stang, Peter J

Titel

Tunable Visible Light Emission of Self-Assembled Rhomboidal Metallacycles

Ist Teil von

• Journal of the American Chemical Society, 2013-09, Vol.135 (37), p.13676-13679

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2013

Quelle

MEDLINE

Beschreibungen/Notizen

• Supramolecular coordination complexes (SCCs) have been proposed for applications necessitating photon emitting properties; however, two critical characteristics, facile tunability and high emission quantum yields, have yet to be demonstrated on SCC platforms. Herein, a series of functionalized D 2h [D2A2] rhomboids (D = 2,6-bis(4-ethynylpyridine)aniline-based ligands; A = 2,9-bis[trans-Pt(PEt3)2NO3]phenanthrene) is described with emission wavelengths spanning the visible region (λmax = 476–581 nm). Tuning was achieved by simple functional group modifications para to the aniline amine on the donor building block. Steady-state absorption and emission profiles were obtained for each system and are discussed. When the Hammett σ para constants for the functional groups para to the aniline amine were plotted versus the wavenumber (cm–1) for the λmax of the emission profile, a linear relationship was observed. By utilizing this relationship, the emission wavelength of a given rhomboid can be predetermined on the basis of the Hammett constant of the functionality employed on the donor precursor. This range of visible light emission for a suite of simple rhomboids along with the predictive nature of the wavelength of emission is unprecedented for these types of systems.