A luminescent iridium(III) cyclometallated complex immobilized in a polymeric matrix as a solid‐state oxygen sensor

Abstract

In luminescence‐based oxygen sensors the active luminescent species is usually a transition metal complex immobilized in a polymeric matrix—in most cases a ruthenium(II) polypyridine complex. In an attempt to overcome some of the disadvantages of these systems, a polymer‐immobilized iridium(III) complex has been prepared and used for the first time as the active species in such a sensor. The luminescence properties of this system are described and its drawbacks with regard to sensors technology discussed.

Ideality of pressure-sensitive paint. II. Effect of annealing on the temperature dependence of the luminescence

“…The pressure-sensitive paints are much more affordable and, with charge coupled device (CCD) camera sensors, produce a virtually continuous pressure map. However, major problems limit the use of these paints in aerodynamical studies: correction for the model movements during analysis, 6,7 slow response time of many paints, 8,9 temperature dependence of the luminescence, 10,11 and self-illumination. 12,13 In this article, we explore one feature of practical value for the use of PSP: the role of annealing the paint in achieving ideal PSP properties.…”

Ideality of pressure-sensitive paint. III. Effect of the base-coat permeability on the luminescence behavior of the sensing layer

“…1,3,6,7 Continuous mappings of pressure at the surface of the foil are obtained at a fraction of the cost usually spent on conventional pressure mapping. However, the superiority of the PSP over the traditional method is not yet ensured because some remaining problems affect the accuracy.…”

“…However, the superiority of the PSP over the traditional method is not yet ensured because some remaining problems affect the accuracy. These problems include photodeterioration of the paint, 1 self-illumination, 8,9 slow response time, 6,10 movement of the model during analysis, 11 and the inherent temperature dependence of PSP. [12][13][14] These factors induce significant errors on the pressure values determined by PSP and restrain the use of PSP in quantitative experiments.…”

“…ϭ D aͩ k r ⌽*͑T͒ k r ϩ A nr e Ϫ⌬Enr/RT ϩ A q e Ϫ⌬Eq/RTͪ (6) Here ⌽*(T) is the yield under constant illumination of the metastable state (S*), which is created by photoexcitation and is quenched by oxygen, and the notation ⌽*(T) indicates that this yield may be a function of temperature (T); k r and k nr are the radiative and radiationless decay rates; q is the bimolecular quenching decay rate; T is the temperature; and D a is the apparatus constant. In eq.…”

Iridium-Based Dual-Functional Nanoparticles for Far-Red Imaging and Photodynamic Therapy

“…Unfortunately, phosphorescent of iridium complex is severely quenched by oxygen because of energy transfer from long-lived triplet MLCT state to triplet ground state of oxygen molecules. In this respect, iridium complexes are ideal phosphorescent oxygen probes [18][19][20], and have been widely utilized to sense cellular oxygen or to image tumor hypoxia [21,22]. More recently, NIR phosphorescent iridium complexes have expanded their application as photodynamic therapy (PDT) agents [23][24][25].…”