White‐Emitting Conjugated Polymer/Inorganic Hybrid Spheres: Phenylethynyl and 2,6‐Bis(pyrazolyl)pyridine Copolymer Coordinated to Eu(tta)₃

Abstract

The synthesis of two cyan color (blue and green emission) displaying high molecular weight 2,6‐bis(pyrazolyl)pyridine‐co‐octylated phenylethynyl conjugated polymers (CPs) is presented. The conjugated polymers are solution‐processed to prepare spin coated thin films and self‐assembled nano/microscale spheres, exhibiting cyan color under UV. Additionally, the metal coordinating ability of the 2,6‐bis(pyrazolyl)pyridine available on the surface of the CP films and spheres is exploited to prepare red emitting Eu(III) metal ion containing conjugated polymer (MCCP) layer. The fabricated hybrid (CP/MCCP) films and spheres exhibit bright white‐light under UV exposure. The Commission Internationale de l'Eclairage (CIE) coordinates are found to be (x = 0.33, y = 0.37) for hybrid films and (x = 0.30, y = 0.35) for hybrid spheres. These values are almost close to the designated CIE coordinates for ideal white‐light color (x = 0.33, y = 0.33). This easy and efficient fabrication technique to generate white‐color displaying films and nano/microspheres signify an important method in bottom‐up nanotechnology of conjugated polymer based hybrid solid state assemblies.

Large‐area flexible, transparent, and highly luminescent films containing lanthanide (III) complex‐doped ionic liquids for efficiency enhancement of silicon‐based heterojunction solar cell

“…Over the past decades, due to several unique photoluminescent features such as large Stokes shift (or low self‐absorption ratio) and high luminescence quantum efficiency, trivalent lanthanide ion (Ln 3+ ) complexes have been regarded as excellent optical centers for the thin films. Several Ln 3+ , like Eu 3+ and Tb 3+ , are capable of emitting pure visible light (red for Eu 3+ and green for Tb 3+ ) under appropriate UV light excitation via the so‐called “antenna effect,” and this is beneficial for improving the η pv of solar cells .…”

Molecular Engineering Approaches Towards All‐Organic White Light Emitting Materials

“…The quality and the quantum efficiency of the WLE materials are the predominant governing factors to transfer them from the laboratory to the marketplace. Considering the concept of additive mixing, enormous attention has been paid by different research groups on the fabrication of WLE materials employing organic, inorganic, and organic–inorganic hybrid scaffolds . We restrict our discussion to the recent development of all‐organic WLE materials .…”

Organic Nanovesicular Cargoes for Sustained Drug Delivery: Synthesis, Vesicle Formation, Controlling “Pearling” States, and Terfenadine Loading/Release Studies

“…Scheme 1: Synthesis of cytosine decorated to 2,6-bispyrazolyl-pyridine derivative (1). General reaction conditions: (a) as per reported procedure [13,14] …”

“…Iodination of the 4,4 -positions of the BPP to synthesize 2 was carried out as per our reported procedure [13,14]. Attachment of "linker molecule" decyn-1-ol to 2 was achieved by adopting Sonogashira cross-coupling conditions to get 3 in good Journal of Nanotechnology …”

“…Molecule 1 was synthesized in six steps from BPP (Scheme 1); compound 2 was synthesized as per our reported procedure [13,14].…”