Photochemical behaviour of iron(III) oxalato complexes with N,N′-ethylenebis(benzoylacetoneiminato) Schiff base derivatives

Chiral Pyrimidine Metallacalixarenes: Synthesis, Structure and Host–Guest Chemistry

“…The behaviour of EDDHA/Fe 3+ towards light could be in accordance with that previously reported for the very photoreactive EDTA/Fe 3+ and DTPA/Fe 3+ 14, 30, 31. In those cases, a mechanism analogous to that proposed for the photochemistry of Fe(III) oxalate32, 33 and citrate complexes34 has been suggested. After light excitation of the complex, Fe(III) is reduced by single electron transfer (SET) from one of the carboxylate groups of the ligand, leading to Fe(II) and carboxylate radical cation species from which the photofragmentation products could be formed.…”

Photocatalytic degradation of methylene blue with hematite nanoparticles synthesized by thermal decomposition of fluoroquinolones oxalato–iron(iii) complexes

“…2,3 The [M III (C 2 O 4 ) 3 ] 3À complexes of Al and transition metal ions have been extensively studied. [4][5][6][7][8][9][10][11][12][13][14][15][16] In 1939, 5 Blair and Jones synthesized potassium tris(oxalato)ferrate(III) trihydrate (KOF) from FeC 2 O 4 . Recently, a modied synthesis method has been introduced by Hussain et al 6 through the reaction of a mixture of K 2 C 2 O 4 $H 2 O and H 2 C 2 O 4 $2H 2 O with Fe(OH) 3 .…”

Mechanism of deactivation processes of excited iron(III) thiocyanato complexes with benacen‐type ligands

“…Based on previously published data [14][15][16], bands in the visible region can be attributed to ligand-to-metal chargetransfer (LMCT) transitions O2p or N(2p) → Fe3d, the ultraviolet bands in the regions of 210-280 nm and 300-360 nm to the intraligand transitions IL(π → π * ) localized predominantly on the phenyl rings and on C=N fragments of the N 2 O 2 -ligands, respectively. Due to their spin-forbidden nature, ligand-field (LF) bands were not observed in solution spectra.…”

“…The Schiff bases H 2 (benacen), H 2 (4-Cl-benacen), H 2 (4-Br-benacen), and H 2 (4-CH 3 O-benacen) were available from our previous work [14,15], their purity was checked by elemental analysis, melting point, 13 −3 to 600 mL volume by dried methanol, adding 0.175 g of solid KNCS, and stirring at ambient temperature. Oxygen was removed from the photolyte solutions by purging with solventsaturated argon 30 minutes prior and during irradiation.…”

“…The total amount of photolysis was limited to less than 5% to avoid an inner filter effect. Details on the photolysis, analytical procedures, and experimental data processing are described elsewhere [14][15][16].…”