Journal
ORGANOMETALLICS
Volume 30, Issue 23, Pages 6383-6392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om2005645
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Funding
- The Ministry of Education of Singapore [R-143-000-429-112]
- National University of Singapore
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A series of binuclear platinum complexes of pentacenyl-6,13-diacetylide with different auxiliary ligands were synthesized to probe the effect of metal coordination on electronic spectroscopy and photophysics, to determine the solid-state packing of the complexes, and to tune emission energy. The complexes with anionic, it-donating ligands showed absorption (687-696 nm) and fluorescence (710-726 nm) lower in energy than those with neutral, g-accepting ligands (662-666, 675-686 nm). Our work showed that coordination of Pt ions with it-donating anionic ligands to pentacenyl-6,13-diacetylide could move the fluorescence of the organic chromophore to the near-infrared region (gimel(em) 710-726 nm). The combined perturbations of alkynation and platination lowered the HOMO -> LUMO transition up to 0.34 eV.
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