Organometallic Polymer Light‐Emitting Diodes Derived from a Platinum(II) Polyyne Containing the Bithiazole Ring

Abstract

The synthesis, thermal, and photoluminescence properties of novel platinum metallopolyynes of bithiazole derivatives trans‐[Pt(PR3)2‐C≡C‐Ar‐C≡C]n (Ar = 4,4′‐dibutyl‐2,2′‐bithiazole‐5,5′‐diyl P1; 4,4′‐dinonyl‐2,2′‐bithiazole‐5,5′‐diyl P2) and their molecular model complexes are described. The structural properties of the dinuclear model compound for P1 have been examined by X‐ray crystallography. In view of the electron‐donating and electron‐withdrawing nature of the thiazole rings in the main chain, a strong π‐conjugated system that features unique donor–acceptor interactions is created, which results in optical bandgaps of 2.40 eV. The optical gap of the polymer is notably reduced as compared to that for the more electron‐rich bithienyl analogue. Multi‐layer polymer light‐emitting diodes have been fabricated with the metallopolymer as the emitting layer, which give a green light color with the Commission Internationale de L'Eclairage (CIE) chromaticity coordinates of (0.26, 0.58) at 8 V.magnified image

Facilitating triplet energy-transfer in polymetallayne-based phosphorescent polymers with iridium(III) units and the great potential in achieving high electroluminescent performances

“…Clearly, these nice EL performances associated the orange phosphorescent copolymers have indicated the great potential these novel phosphorescent polymers with platinum(II) polymetallayne backbones, which has been rarely explored in the field of PHOLEDs. Several years ago, we employed bithiozole-based based platinum(II) polymetallaynes as green emitters for fluorescent OLEDs, which just achieved h L of 0.11 cd A À1 [6]. At present, the yellow/orange phosphorescent polymers are in limited number compared with the ones emitting primary colors.…”

“…Furthermore, some platinum(II) polymetallaynes can exhibit strong fluorescent emission at room temperature. Hence, some organic light-emitting diodes (OLEDs) have been fabricated with platinum(II) polyynes containing bithiazole unit [6]. All these important applications associated with polymetallaynes has been afforded by their diverse photophysical behaviors which can be effectively manipulated through tuning the structure of organic spacers [2b], i.e.…”

Construction of Functional Polymers from Acetylenic Triple‐Bond Building Blocks

“…[19] Wong and Djurišić's team, on the other hand, prepared organometallic PAEs containing platinum atoms and bithiazole units (cf., Scheme 5) with optical band gaps down to 2.40 eV and demonstrated their applications as emitting layers in the fabrication of polymer lightemitting diodes. [20] We hope that this Series will serve as a stimulus for new research efforts to realize the full potentials of acetylenic monomers as a group of versatile building blocks for the construction of …”

Elucidating the thermal degradation of carbazole‐containing platinum–polyyne polymers

“…Despite many examples of platinum(II)–polyyne polymers and carbazole‐based polymers, their thermal analysis studies have usually reported only the initiation temperatures of thermal decomposition . In other words, there have been, to the best of our knowledge, no detailed reports on the thermal degradation mechanism.…”