Conjugated Copolymers Containing Low Bandgap Rhenium(I) Complexes

Abstract

Conjugated copolymers with novel low bandgap rhenium(I) complexes on the polymer main-chain are reported. The low bandgap metal-containing polymers were synthesized by Suzuki cross-coupling polycondensation or Stille coupling polymerization. The metal free copolymers are conjugatively-linked with functionalized intramolecular charge transfer units, which exhibited prominent absorption band in the UV-vis region. These functionalized charge transfer units not only broadened the absorption spectrum, but also functioned as a bidentate ligand. Upon the complexation of rhenium(I) pentacarbonyl chloride, the absorption spectrum of the resulting polymers was further boardened, and the bandgap was reduced. The material design of this work has opened up a new approach in developing low bandgap metal-containing polymers as light harvesting materials.

Synthesis of Metal-Containing Poly(thiophene methines) via Solid- and Melt-State Polymerization and Their Related Applications as Highly Sensitive Ni2+ Chemosensors

“…In this way, the metal complex monomer should be chemically stable enough for the following polymerization process, or else demetalation would occur, as mentioned by other researchers. 15 Otherwise, the polymerization would not happen or invasive metal ions would be introduced because of their frequent involvement in the metal-catalyzed polymerization.…”

Versatile control of the optical bandgap in heterobimetallic polymers through complexation of bithiazole-containing polyplatinynes with ReCl(CO)5

“…As the number of thienyl rings (m) increases from 1 to 2, the relative intensity of the first higherenergy band to the second lower-energy one also increases due to the increasing contribution of the thienyl absorption. Relative to the bithiazole based Pt polymers P0eP2 without the Re(CO) 3 Cl moiety, the absorption profiles of P0-Re to P2-Re experienced a clear red-shift in the spectral wavelengths [80,81] (Fig. 7).…”

Thiophene-Based Trimers and Their Bioapplications: An Overview

“…The double condensation occurring between amines and ketones forms a pyridazine ring fused with the central thiophene. Therefore, changing the diketone substituents, a large variety of substituted pyrazine rings can be obtained, such as alkyl groups [ 178 , 411 ], unsubstituted and substituted phenyl groups [ 180 , 196 , 412 , 413 , 414 , 415 ], tiophenes [ 413 , 416 , 417 ], furans [ 201 , 418 ], pyridines [ 419 , 420 ], phenazine [ 421 ], naphtalimide [ 185 ], perylene imide [ 422 ] carbazole [ 423 ], and fullerene [ 424 ]. In alternative to α-diketones, an α-diester [ 167 ] or an α-diimine [ 425 ] can be employed for the obtaining of functionalized thienopyrazine units.…”