Conjugated Polymers Complexed with Helical Porphyrin Oligomers Create Micron‐Sized Ordered Structures

Abstract

Recently, oriented polymers and/or polymer nanostructures have attracted a large amount of attention. Of particular interest are structures that consist of conjugated polymers (CPs) because of their potential applications as, for example, electrochemical switches, electric devices, and sensors. [1,2] In

Self-assembly of large-scale P3HT patterns by confined evaporation in the capillary tube

“…Recently, self-assembly methods have been applied to align conjugated polymer chains. 14 For instance, the use of supramolecular self-assembly methods, 15 LB lm deposition technology 16 and self-assembly methods based on evaporation like controlled evaporative self-assembly (CESA). 17,18 Using these molecular self-assembly techniques, especially the selfassembly approaches occur at the interface, can achieve an orderly arrangement of molecules through evaporation and drying.…”

Toward the alignment of conjugated polymers into anisotropically-ordered structure

“…From a supramolecular standpoint, we recently reported a supramolecular bundling approach toward the alignment of CPs. [14][15][16] One approach is to utilize a crosslinking molecule ('aligner') to bundle CPs into organized structure. 14,15 The other one is to use a twining polymer ('twimer'), which twines around CPs and then selfassembles into bundled architectures (Fig.…”

“…1). 16 In animal cells, it is known that the bundling proteins interact with one-dimensional (1D) actin filaments in high affinity to elicit the formation of actin bundles that play an important role for muscle contraction. The bundling proteins possess more than two interactive modules for crosslinking actin filaments; their distinct properties determine the type of assembly (Fig.…”

“…The other system, utilizing twimers, leads to sequential alignment of CPs. 16 Twimer, which is a 1D polymer with interactive moieties for CP binding at regular intervals, helically twins around (or wraps) the CPs in solution. Twimers are designed to possess aggregative moieties on their either side when they include CPs in their internal spaces; the resulting 1D complexes tend to self-assemble into 2D aligned structure, rather than a 3D structure, in the drying process (Fig.…”

“…15 Twimers Por-12 and Por-6 are porphyrinatozinc polymers linked by phenyleneethynylene spacers. 16 In their energy-minimized states, these twimers tend to form a helical structure in which a coordinative open face of the zinc porphyrin unit (but not a non-coordinative face covered by a decamethylene strap 23 ) is always turned inwards so that the central metal atom can interact with the included CP. We expected, therefore, that CPs possessing appropriate ligand groups, e.g., CP1 and CP2 would become included within this helical strand through coordination with the porphyrinatozinc.…”