Re(i) derivatives functionalised with thioether crowns containing the 1,10-phenanthroline subunit as a new class of chemosensors

Abstract

Luminescent Re(i), Re(i)/Au(i) and Re(i)/Ag(i) derivatives functionalised with thioether crowns containing the 1,10-phenantholine are reported.

Linking ReI and PtII Chromophores with Aminopyridines: A Simple Route to Achieve a Complicated Photophysical Behavior

“…In complexes 1 – 3 , the metal ions are found in an octahedral ligand environment, typical of Re I tricarbonyl complexes. The interatomic bond lengths and angles are not exceptional and lie in the range found for related species . The distances between the rhenium and coordinated amine nitrogen in 2 and 3 (2.214 and 2.216 Å) are slightly shorter than the N py −Re contacts in 1 (av.…”

“…It has been shown earlier that [Re(diimine)(CO) 3 L] + complexes (L=labile ligand) can be easily functionalized by the substitution of L with a variety of pyridine ligands . [Re(phen) (CO) 3 (NCMe)] + (phen=phenanthroline) was treated with 4‐aminopyridine ( L1 ), 4‐(aminomethyl)pyridine ( L2 ), and 4‐(2‐aminoethyl)pyridine ( L3 ) in THF at reflux to give tricarbonyl compounds [Re(phen)(CO) 3 ( L1 – L3 )] + ( 1 – 3 ) in moderately good yields after crystallization (Scheme ).…”

“…In complex 1 , the aminopyridine ligand L1 is conventionally coordinated through the N py donor, similarly to the close congener [(4,4'‐ t Bu 2 bpy)Re(CO) 3 L 1 ] + (bpy=2,2'‐bipyridine) . Interestingly, the ligands L2 and L3 were found to bind the rhenium center through the primary amine group, and it is noteworthy that this type of coordination to the Re I center has been observed in very few cases and is much less common than the binding of the sp 2 ‐hybridized nitrogen of aromatic heterocycles . In complexes 1 – 3 , the metal ions are found in an octahedral ligand environment, typical of Re I tricarbonyl complexes.…”

Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz). Redox behavior of the excited states and their interaction with Calf Thymus DNA

“…Rhenium (I) tricarbonyl complexes have been extensively investigated in different fields of research due to their rich photophysics and photochemistry [1][2] . These properties lead to new applications in the CO2 photoreduction [3][4][5][6] , photocatalysis 7 , organic light emitting diode devices (OLEDS) [8][9] , electron transfer processes [10][11] , chemosensors 12 and solar energy conversion 13 . It has been established that the source of the luminescence of polypyridinic Re(I) complexes is in great part associated with metal to ligand charge transfer excited states (MLCTReL), i.e., excited states whose energy can be modulate by a judicious selection of the ligands 1,[14][15][16][17][18][19] .…”

Self-assembled coordination thioether silver(I) macrocyclic complexes for homogeneous catalysis

“…None of the silver(I) catalysts based on sulfur ligands were reported so far, although alkyl thioethers are soft σ-donor ligands such as crown thioethers that were largely developed as macrocyclic ligands for silver(I) [35–43]. Interestingly, depending on their design, these known silver(I) complexes can be discrete species [35–38], coordination driven supramolecules [35,42] or coordination polymers [39–40 42]. To the best of our knowledge, silver crown thioether complexes were never reported as catalysts.…”