Conductive microrod preparation by molecular self-assembly and polymerization

Abstract

Conductive microrods were prepared by evaporation-induced self-assembly (EISA) and subsequent polymerization of a novel, self-assembling molecule with pyrrole end groups. The newly synthesized selfassembling molecule of N91,N96-bis(3-(1-pyrrolyl)propanoyl) hexanedihydrazide self-assembled from a dilute solution into microrods. Pyrrole ring stacking was the key driving force inducing molecular selforganization to microrods. After the self-assembly, the pyrrole groups on the surface of the microrods were chemically polymerized to make the microrod conductive. The electrical conductance of the polymerized microrods was comparable to that of other conducting polymer microrods. Analyses of the polymerized microrods confirmed that the polymerization took place only at the surface of the microrod assembly. This study proved the concept of self-assembly and polymerization to generate complex structured functional materials, and is valuable for the design of functional self-assembling molecules.

Lysosome-Instructed Self-Assembly of Amino-Acid-Functionalized Perylene Diimide for Multidrug-Resistant Cancer Cells

“…After 24 h of treatments, fibrous self-assembled structures of the PDI-βAla and PDI-5AVA were observed in the lysosomes; further, swollen lysosomes and destroyed organelles, such as mitochondria, were observed distinctly (Figure b). Note that the TEM images of the MCF7 cells treated with PDI-Asp also show fibrous internal structures; however, these structures were likely to be driven by evaporation-induced self-assembly during the cell sample preparation procedures. , Further, the TEM images of PDI-5AVA-treated MCF-7 cells also support the formation of self-assemblies inside lysosomes with time (Figure c). At early stages, internalization of PDI-5AVA through endocytosis was observed and fibrous assemblies were structured in endosomes.…”

Polypyrrole/Agarose-Based Electronically Conductive and Reversibly Restorable Hydrogel

“…31,32 In this study, we synthesized the conductive hydrogel by pyrrole polymerization inside the A-gel framework (Figure 1a). Since both pyrrole and PPy are immiscible with aqueous solvents, 33,34 the watersoluble oxidizing agent was mixed with melted A-gel at ∼40 °C and was then polymerized by adding pyrrole monomers to the mixture to improve the homogeneity of PPy distribution in the gel. As the temperature decreased to room temperature (∼25 °C), gelation of agarose and polymerization of pyrrole occurred simultaneously.…”

Significant enhancement of curcumin photoluminescence by a photosensitizing organogel: An optical sensor for pyrrole detection

“…Average diameter of the fibrils was 61 nm that was determined by measuring sizes of fibrils in the SEM images. In our previous study, intermolecular interactions such as aromatic stacking and hydrogen bonding are the driving force of selfassembly to create microrods [13]. With a decrease in the solvent polarity, the fully dissolved DPH molecules were organized into an ordered structure of fibrils, probably due to the solubility change, and were further associated to a form network structure.…”

“…A detailed synthesis procedure is reported elsewhere [13]. Briefly, 1-(2-cyanoethyl) pyrrole was transformed to 1-(2-carboxylethyl) pyrrole according to the literature [14], and then was conjugated with AAD.…”