Bis-cyclometalated Ir(III) complexes with a diphenylamino group: design, synthesis, and application in oxygen sensing

Modulation of Optical Oxygen Sensing Properties of Iridium (III) Complexes By Changing Their Substitution Groups

“…The relative signal intensity (I 0 /I 100 ) changes of the related the Ir (III) complexes were measured in the gas-permeable PMMA and EC polymeric matrix. The highest sensitivities were obtained in the EC matrix for all four complexes matching with literature knowledge [3,13]. Therefore, the EC polymer matrix was chosen as a suitable material to investigate the O 2 sensitivities of the synthesized Ir (III) complexes (Ir-1, -2, -3 and − 4) for further studies.…”

“…Liu and co-workers reported the oxygen sensitivity studies of bis-cyclometalated-diphenylamino equipped iridium (III) complexes in ethyl cellulose (EC) lm. The in uences of substituents (-H, -CH 3 , -F, -CF 3 ) at the pyridyl moiety of ppy of these complexes were investigated systematically, and I 0 /I 100 values of the Ir-1, -2, -3 and − 4 complexes in EC thin lm were 16.2, 16.4, 15.2 and 14.1, respectively [3]. Toro and co-workers presented the nanostructured materials that including four various Ir (III) dyes associated either with polystyrene or metal oxide.…”

A diphenylamino-substituted cationic cyclometalated Ir(iii) complex: its aggregation-induced phosphorescent emission and oxygen sensing properties

“…In 1996, Marco and co-workers 33 reported the first use of an Ir(III) complex as the active species in a luminescent oxygen sensor, which attracted much attention and lots of Ir(III) complexes as OSPs have been reported successively thereafter. [34][35][36][37] We have a long-term interest in disclosing the relationship between the molecular structures of the cyclometalated metal complexes and their oxygen sensing properties. A series of platinum(II) and iridium(III) complexes as efficient OSPs have been synthesized and investigated.…”

“…A series of platinum(II) and iridium(III) complexes as efficient OSPs have been synthesized and investigated. 5,[37][38][39][40][41][42] In this paper, a new diphenylamino (DPA)-substituted cationic bis-cyclometalated Ir(III) complex with AIPE properties was synthesized, which was used to explore the effects of the DPA group on the photophysical and electrochemical properties of the corresponding Ir(III) complex. In addition, the oxygen sensitivity and operational stability of the Ir(III) complex were studied.…”

The influence of molecular structure on collision radius for optical sensing of molecular oxygen based on cyclometalated Ir(iii) complexes

“…In principle, oxygen sensitivity is roughly in proportion to phosphorescent decay time of the emitter. [11][12][13][14] State of the art optical oxygen sensors are mainly made up of phosphorescent iridium, platinum complexes, BF 2 , and aluminum chelates, which possess decay time varying in long range of microseconds to milliseconds. [15][16][17][18][19] To prevent potential interference and loss of emitters, polymer matrices are oen used as permeation-selective barrier.…”