Luminescence from open-shell, first-row transition metal dipyrrin complexes

Abstract

Several first-row transition metal complexes of the 1,9-bis(2’,4’,6’-triphenylphenyl)-5-mesityl dipyrrinato ligand and its tetrahalogenated analogs have been synthesized and their luminescence spectra obtained. The protonated ligands, as well as the Li(I),...

Easy access to strongly fluorescent higher homologues of BODIPY

“…[3][4][5] The fluorescence of dipyrromethene based compounds is due to a ligand based π*-π emission where the strength of this electronic transition is influenced by the bulkiness of the aryl group at the meso-position, [6][7][8][9] the dimensions of the conjugated π-system, and the rigidification by chelating cationic species. [10][11][12] Although the first representatives of BODIPYs were described as early as 1968 by Treibs and Kreuzer, the synthesis of the "parent" BODIPY was not reported until 2009 (Fig. 1a).…”

Efficient emission of Zn(ii) and Cd(ii) complexes with nopinane-annelated 4,5-diazafluorene and 4,5-diazafluoren-9-one ligands: how slight structural modification alters fluorescence mechanism

“…Zinc( ii ) and cadmium( ii ) complexes establish one of the most important classes of emissive compounds. 71–121 Earlier, we synthesized a series of mononuclear zinc( ii ) and cadmium( ii ) complexes with hybrid ligands containing a 2,2′-bipyridine moiety and natural terpene (+)-limonene or (+)-3-carene moieties and demonstrated that they exhibit luminescence with the quantum yield increasing in the following order: free ligand < cadmium( ii ) complex < zinc( ii ) complex. 122 The complexes with the limonene derivative demonstrate excitation wavelength–dependent emission with nanosecond and microsecond lifetimes of the excited states.…”

A novel tetranuclear Cu(ii) complex for DNA-binding and in vitro anticancer activity

“…In the last decades, metal complexes have attracted increasing attention due to the potential applications such as catalysis, 1–3 luminescence, 4–8 magnetic material, 9–13 and biological activities 14,15 etc. In particularly, the anticancer activity of the metal complexes has received more attention since cisplatin was successfully used to treat various cancers.…”