335654-34-7Relevant academic research and scientific papers
NOVEL POLYHEDRAL OLIGOMERIC SILSESQUIOXANE (POSS) BASED FLUORESCENT COLORANTS
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Page/Page column 25, (2008/06/13)
Novel fluorescent polyhedral oligomeric silsesquioxane (POSS) colorants are provided. The colorants are strongly fluorescing and long lasting with excellent light stability. The novel colorants can be prepared from chromophores found in common pigments an
Intramolecular energy transfer in a tetra-coumarin perylene system: Influence of solvent and bridging unit on electronic properties
Hurenkamp, Johannes H.,Browne, Wesley R.,Augulis, Ramnas,Puglys, Audrius,Van Loosdrecht, Paul H. M.,Van Esch, Jan H.,Feringa, Ben L.
, p. 3354 - 3362 (2008/10/09)
The synthesis and characterisation of a novel coumarin donor-perylene bisimide acceptor light-harvesting system is reported, in which an energy-transfer efficiency of >99% is achieved. Comparison of the excited-state properties of the donor-acceptor syste
Synthesis of diazadibenzoperylenes and characterization of their structural, optical, redox, and coordination properties
Wuerthner, Frank,Sautter, Armin,Schilling, Joachim
, p. 3037 - 3044 (2007/10/03)
Tetraphenoxy-substituted diazadibenzoperylenes 5a,b were synthesized from tetrachloroperylene tetracarboxylic acid bisanhydride 1 through imidization with benzylamine, nucleophilic displacement of the four chlorine atoms by phenolates, carbonyl group reduction by LiA1H4/A1C13, and subsequent Pd/C-promoted debenzylation-dehydrogenation. The structural properties of these extended diazaarenes are discussed on the basis of a X-ray crystal structure of the N,N'-dibutylated diazadibenzoperylenium dication 6, which revealed a 25° twist of the central six-membered ring leading to an atropisomeric π-conjugated backbone. The chromophoric systems of 5 and 6 were characterized by optical absorption and fluorescence spectroscopy, which revealed an intense fluorescence with a quantum yield of 75% for 5 and 50% for 6. Cyclic voltammetry showed reversible oxidation and reduction waves for 6, whereas the oxidation of 5 afforded the irreversible deposition of a conductive film on the electrode surface. Finally, the potential use of ligands 5 in supramolecular chemistry has been evaluated by complexation experiments with carboxylic acids and zinc tetraphenylporphyrin (ZnTPP).
