Benzoselenophenylpyridine platinum complexes: green versus red phosphorescence towards hybrid OLEDs

Abstract

The solid solutions of the novel platinum complexes bearing pyridyl benzo[b]selenophenes moieties emitted efficient green and red phosphorescence with absolute quantum yields of 52% (for green) and 11.6% (for red).

Applications of Oxone® in Organic Synthesis: An Emerging Green Reagent of Modern Era

“…Selenophene and their derivatives are an important class of heterocyclic systems, studied extensively due to their intrinsic biological activities in addition to their wide applicability in material sciences and technology. [339,340] Interestingly, different methodologies have successfully been reported because of the potential utility of the selenophenes in diverse areas like pharmaceuticals, organic syntheses and materials sciences. [341] Therefore, in quest for the generation of new methods to these vital molecules" Hellwig et al recently developed a transitionmetal-free method for accessing 3,4-bis(butylselanyl)selenophenes 463a-b or 464c-ein moderate to good yields by electrophilic cyclization of 1,3-diynes 461 with dibutyldiselenide 462 using oxone in acetonitrile or alcoholic solvents (Scheme 145).…”

“…Among the uncountable N-heterocyclic systems, pyrazole ring is found in a myriad of vital natural and non-natural products in addition to its presence in some important commercial drugs. [335][336][337][338][339][340] In that context, Perin et al developed a simple and efficient one-pot synthesis of 4-organoselanyl-1H-pyrazoles 485a-j in moderate to excellent yields from α,β-alkynyl hydrazine 483 and diphenyl diselenide 484 with the usage of oxone/EtOH under metal-or halogen-free conditions (Scheme 149). [349] The proposed mechanism for this protocol reported by the authors is displayed in the Scheme 150, in which electrophilic species of selenium 486 are easily generated in-situ by the reaction of diorganyldiselenides 484 with oxone/ethanol in an open-flask at 70 °C.…”

“…Selenophene and their derivatives are an important class of heterocyclic systems, studied extensively due to their intrinsic biological activities in addition to their wide applicability in material sciences and technology [339,340] . Interestingly, different methodologies have successfully been reported because of the potential utility of the selenophenes in diverse areas like pharmaceuticals, organic syntheses and materials sciences [341] .…”

Functional Materials Based on Cyclometalated Platinum(II) β-Diketonate Complexes: A Review of Structure–Property Relationships and Applications

“…Very recently, the first examples of phosphorescent Pt(II) complexes bearing 2- and 3-(2-pyridyl)benzo[ b ]selenophenes 53 and 54 ( Figure 12 ) have been reported [ 89 ]. Though they possess very small differences in the molecular design, these two complexes efficiently emitted green and red phosphorescence with absolute Φ = 0.52 (for green) and 0.11 (for red).…”

Recent Advances in the Synthesis of Selenophenes and Their Derivatives

“…In this context, selenophenes and their derivatives have been widely studied due to their intrinsic biological activity [22], such as antidepressant [23][24][25][26][27][28], antioxidant [29][30][31][32][33][34][35], anticonvulsant [36,37], antibacterial [38], antitumor [39][40][41][42][43][44][45][46][47], antinociceptive [48], hepatoprotective [49,50] and antiapoptotic agents [51]. Besides, they have also played an important role in the materials science field, being used to build organic light emitting diodes (OLEDs) [52][53][54][55][56][57][58], organic field effect transistors (OFETs) [59][60][61][62][63][64][65][66][67][68]…”