Iron-coordinating π-conjugated semiconducting polymer: morphology and charge transport in organic field-effect transistors

Abstract

A new approach to improve charge transport and solid-state morphology in a semiconducting polymer was developed through metal coordination without disruption of the π-conjugation.

Modulating the Photophysical Properties and Electron Transfer Rates in Diketopyrrolopyrrole-Based Coordination Polymers

“…The synthetic pathway for the preparation of coordination polymers P1 – P5 is depicted in Scheme and detailed in the Supporting Information. First, compound 1 was alkylated with a terpyridine pincer ligand (compound 2 ), thus affording DPP-TerPy , a chelating monomer which was then further combined with a variety of M­(II) sources to afford DPP-based coordination polymers P1 – P5 . , Notably, despite many attempts in purification by column chromatography and successive recrystallization, a small excess of remaining ligand was observed for DPP-TerPY , which can be explained by the low solubility of both ligand and monomer in common organic solvents. It is also important to mention that bromine was used as termini at the 2 and 2′ positions of the DPP core to avoid the presence of reactive protons and to incorporate a functional group handle for further functionalization .…”

“…The utilization of noncovalent interactions in dye-based materials has been shown to be a promising strategy for the fabrication of organic electronics. − The photophysical, optoelectronic, and thermomechanical properties of materials are not only dependent on the chemical structure but also on the self-assembly of the molecules in both solution and the solid state. − Since noncovalent interactions can be tailored and designed to be highly specific, supramolecular chemistry has allowed for the development of novel dye-based materials with favorable optoelectronic properties. Specifically, the incorporation of noncovalent bonding moieties in DPP-based π-conjugated polymers through either backbone or side-chain engineering has allowed for new materials with improved charge transport and thermomechanical properties. − However, the use of supramolecular interactions such as hydrogen bonds, metal–ligand interactions, or electrostatic forces is rather challenging with these macromolecules due to the low solubility of the resulting materials. To push the boundary of supramolecular chemistry in optoelectronic materials, the development of supramolecular polymers is particularly interesting since this can allow for the preparation of an entirely new family of optoelectronic materials from a bottom-up approach. , Moreover, the dynamic nature of these interactions gives an opportunity to control the self-assembly, size, and shape of the resulting materials …”

Organic thin film transistors‐based biosensors

“…For example, through addition a low amount of “bad” solvent (acetone) in the “good” solvent (chloroform) of the polymer, a threefold increase in OTFT transconductance is achieved due to the increased electron mobility ( μ ) and volumetric capacitance ( C *) in the channel 39 . Moreover, polymer/dielectric blends 40 and metal‐chelating conjugated polymer OSCs 41 are also used to enhance and modulate the charge transport properties of OTFTs. By blending polystyrene (PS) with DPP‐based polymer OSCs, hole mobility is increased three times and the morphology of the fiber network is significantly modified.…”

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

“…Organometallic polymers. Metal-containing organic polymers, or organometallic polymers (Nguyen et al, 2018), have a long history for use in sensing (Kumar et al, 2020a), optoelectronics (Onge et al, 2020), and catalysis (Joshi et al, 2020). They have been used as sensors for a variety of analytes (Xu et al, 2017), including pesticides, using a range of transduction mechanisms, including electrochemical (Wang et al, 2020g), colorimetric (Scarano et al, 2019), and Raman spectroscopybased detection (Yan et al, 2019).…”