Slow relaxation of magnetization and luminescence properties of a novel dysprosium and pyrene-1,3,6,8-tetrasulfonate based MOF

Abstract

A novel multifunctional Dy(iii) and pyrene-1,3,6,8-tetrasulfonate based MOF displays intense PL/ SIM behaviour.

Near‐IR Luminescent YbIII Coordination Polymers Composed of Pyrene Derivatives for Thermostable Oxygen Sensors

“…The NIR luminescence properties of Yb III –TBAPy and Yb III –TIAPy were assessed by acquiring emission spectra and determining emission lifetimes. The emission quantum yield of Yb III –TIAPy was evaluated as 6.6 % under argon, similar to the values previously reported for highly luminescent Yb III complexes . The oxygen‐sensing abilities of these materials were evaluated based on their emission spectra and lifetimes under air and argon and in vacuo.…”

“…[15,16] Therefore, combinations of pyrene-based compounds and visible-luminescent lanthanide ions do not make effective luminescent oxygen sensors.F or this reason,i nt he work reported herein, we attempted to use Yb III ions to produce luminescentl anthanide coordination polymers composed of TBAPy and TIAPy.Y b III complexes show near-infrared( NIR) luminescence attributable to the 2 F 5/2 -2 F 7/2 magnetic dipole transitiona t9 70 nm. The energyg ap betweent he 2 F 7/2 and 2 F 5/2 levels is 10,200cm À1 , [23] which is less than that for the excited triplet states of TBAPy and TIAPy (> 15,000 cm À1 ). Moreover, diketonate Yb III complexes incorporating pyrene derivatives have been reported to functiona sp hotosensitized NIR luminophores, albeit with low emission quantum yields (< 1.0 %).…”

“…The emission quantumy ield of Yb III -TIAPyw as evaluated as 6.6 %u nder argon, similartot he values previously reported for highly luminescent Yb III complexes. [23] The oxygen-sensing abilities of these materials were evaluatedb ased on their emission spectra and lifetimes under air and argon and in vacuo. The thermo-stable and oxygen-sensitive Yb III luminophore was confirmed as potentially serving as an effective solid-state oxygen sensor.…”

Pyrene-based metal organic frameworks: from synthesis to applications

“…154 The origin of the luminescence in MOFs can be associated with a variety of mechanisms due to the structural diversity of MOFs. 155 This can include ligand-based emission, 66 metal-based emission, 67,89 emission due to excimer formation, 156 or guest induced emission. 155,157 Pyrene-based MOFs have been attractive for sensing applications due to the fluorescence properties of pyrene.…”

Magnetic and luminescent coordination networks based on imidazolium salts and lanthanides for sensitive ratiometric thermometry

“…Beside luminescent properties, lanthanide ions exhibit large magnetic moment and strong magnetic anisotropy, which might have potential applications of lanthanide-based networks in information storage, quantum computing and spintronics [ 19 – 23 ].…”