π-Conjugated Oligomers and Polymers with a Self-Assembled Ladder-like Structure

Abstract

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Intramolecular Hydrogen‐Bond‐Assisted Planarization of Asymmetrically Functionalized Alternating Phenylene–Pyridinylene Copolymers

“…[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] p-Conjugated polymers that incorporate aryl heterocyclic units, such as pyridine, pyrrole, and thiophene rings, have been synthesized and employed in industrial applications. [30][31][32][33][34] The laddertype polymers incorporated with pyrazines, [35] benzothiadazoles, [36] pyrroloimides, [37] pyridobisimidazoles, [38] and benzothiazole [39] that contain intramolecular hydrogen bonds along the polymer backbone are also known in the literature. One of the most important features of the pyridine-incorporated polymers is the high electron affinity of pyridine compared to phenylene-based polymers.…”

Ladderlike Oligomers; Intramolecular Hydrogen Bonding, Push-Pull Character, and Electron Affinity

“…Instead of using covalent bonds, secondary interactions, such as hydrogen bonds, can be used to planarize a polymeric backbone. [11±15] In our group Delnoye et al [12] synthesized a copolymer composed of alternating pyrazine and acylated 1,4-phenylenediamine units (Scheme 1), taking advantage of the hydrogen bond accepting capabilities of the pyrazine units to organize the system in a close to planar conformation.…”

Transport and Electro‐Optical Properties in Polymeric Self‐Assembled Systems

“…Comb-shaped regioregular poly(4-alkylquinoline-2,6-diyl)s show lamellar structures and p-stacking and emit yellow light at 542-557 nm [313]. Finally, it is pointed that the planarity can be controlled by supramolecules interactions [314,315].…”