Synthesis, characterization and photophysical properties of gold(I)–copper(I) alkynyl clusters with 1,4-bis(diphenylphosphino)butane, effect of the diphosphine ligand on luminescence characteristics

Tripodal gold(i) polypyridyl complexes and their Cu+and Zn2+heterometallic derivatives. Effects on luminescence

“…31 P NMR spectra display only one signal in all cases, as a direct proof of equivalent phosphorous atoms in solution (see SI). IR spectra suggest that the coordination of Cu(I) occurs through the alkynyl moiety, as reported in the literature, [36][37][38][39] since the stretching vibrations modes were affected with respect to the homometallic precursor. Nevertheless, the simultaneous coordination through N groups could not be excluded.…”

Novel NIR-Phosphorescent Ir(III) Complexes: Synthesis, Characterization and Their Exploration as Lifetime-Based O2 Sensors in Living Cells

“…the lifetime difference for degassed and aerated solutions in aqueous media and methanol, Table 1 and Table 2 ). The reason for such different behavior was the interaction of rather hydrophobic sensor molecules with the components of DMEM/FBS mixtures, of which the bovine serum albumin (BSA) molecules were the most probable candidates for the sensors’ absorption in their hydrophobic pockets, thereby changing the photophysics of the iridium emitters [ 27 , 28 , 41 , 42 , 43 , 44 , 45 , 46 ]. To verify this hypothesis, we performed lifetime measurements for 1 and 7 in aerated and degassed aqueous solutions containing BSA as the only biological molecule (see Table 2 ).…”

Sky-Blue Luminescent AuI–AgI Alkynyl-Phosphine Clusters

“…As expected the luminescence wavelengths for 4−6 are considerably blue-shifted compared to those of the Au−Cu congeners; for example, the copper analogue of 4 displays orange emission with the maximum at 590 nm. 10 The high energy shift of the silver complexes emission is due to lower energy of the highest occupied molecular orbitals in silver containing complexes compared to those of the copper relatives. All complexes display single exponential emission decay with the excited state lifetime in microsecond domain.…”

“…Therefore, our intention was to investigate stereochemically flexible diphosphine 1,4-PPh 2 –(CH 2 ) 4 –PPh 2 as an ancillary ligand to stabilize the polymetallic compounds having different types of alkyne groups (aromatic, aliphatic, hydroxyaliphatic). Moreover, our recent work on the Au I –Cu I species bearing 1,4-PPh 2 –(CH 2 ) 4 –PPh 2 demonstrated that these complexes display a blue-shift of the emission maximum of up to 40 nm in comparison with the structurally analogous compounds based on the 1,4-PPh 2 –C 6 H 4 –PPh 2 ligand without loss of quantum efficiency …”

“…Moreover, our recent work on the Au I −Cu I species bearing 1,4-PPh 2 −(CH 2 ) 4 −PPh 2 demonstrated that these complexes display a blue-shift of the emission maximum of up to 40 nm in comparison with the structurally analogous compounds based on the 1,4-PPh 2 −C 6 H 4 −PPh 2 ligand without loss of quantum efficiency. 10 Herein we report on the synthesis of novel Au I −Ag I polymetallic aggregates, their structural characterization, and systematic spectroscopic studies of their dynamic behavior in the fluid phase together with the detailed investigation of the photophysical characteristics supported by the theoretical DFT calculations.…”