Preparation of polypyrrole microtubules by selective deposition on peptide-decorated microtubular templates

Lee, Inho; Dong, Hyunbae; Lee, Sang Yup

doi:10.1016/j.cap.2009.05.029

Cited by 2 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of the hydrophobic–hydrophilic interaction, bolaamphiphilic molecules self-organize in an aqueous medium to create complex-structured assemblies with various chemical and physical properties. − One outstanding property of bolaamphiphilic self-assemblies over general surfactant micelles is their mechanical stability, which makes the self-assembled structures stable even under a vacuum and in a dried state. This outstanding mechanical stability permits the use of bolaamphiphilic self-assemblies as rigid templates or suprastructures for the synthesis of biomolecular, polymeric, and inorganic hybrid substances in controlled shapes. − In addition to their mechanical stability, bolaamphiphilic molecules with peptide hydrophilic moieties in particular offered unusual biochemical functionalities. Short peptides or amino acids have been applied as the biochemical hydrophilic groups upon synthesis of peptidic bolaamphiphilic molecules.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Catalytic and Sensing Cascades Built with Two Designer Bolaamphiphilic Self-Assemblies

Kwak

Kim

Lee

2015

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

A system performing both a catalytic hydrolysis reaction and the direct optical monitoring of the product was created by the combination of two bolaamphiphile self-assemblies. Two bolaamphiphilic self-assemblies were applied as a biomimetic catalyst of p-nitrophenyl acetate (p-NPA) hydrolysis and an optical sensor probe that detects p-NPA hydrolysis through photoluminescence quenching by p-nitrophenol (p-NP), the product of p-NPA hydrolysis. One bolaamphiphilic self-assembly with a histidine moiety catalytically hydrolyzed the p-NPA substrate, and the other self-assembly of tyrosyl bolaamphiphile monitored the product of p-NP by photoluminescence quenching. The progression of the reaction and quenching degree were adjusted by controlling the quantity of histidyl and tyrosyl self-assemblies, respectively. The reaction and subsequent sensing cascade could be interrupted by a reducing agent. The addition of NaBH4 induced the chemical conversion of p-NP to p-aminophenol, which retarded photoluminescence quenching. Thus, it was demonstrated that hydrolysis of an organic substrate and subsequent monitoring of the hydrolysis reaction could be achieved through a combination of independent bolaamphiphilic self-assemblies. This study demonstrated the construction of a catalytic reaction and detection system incorporating designer biomimetic self-assemblies whose functionalities were devised to realize deliberate functions.

show abstract

Section: Introductionmentioning

confidence: 99%

Biomimetic Catalytic and Sensing Cascades Built with Two Designer Bolaamphiphilic Self-Assemblies

Kwak

Kim

Lee

2015

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…Bolaamphiphiles containing an amino acid (or a peptide) as hydrophilic end groups are attractive self-assembling molecules which have several advantages including controllability of the chemical characteristics by selection of the amino acid and hydrophobic chain, higher mechanical strength of the self-assembled structure than micelles or liposomes prepared from conventional surfactants, and versatility to associate with other small substances such as molecules and nanoparticles. These advantages make self-assembly of bolaamphiphiles containing amino acids attractive as a reactive soft matrix for the reduction of inorganic ions, − a rigid template decorated with diverse substances, − and a host for the hybridization with heterogeneous inorganic substances . However, the suprastructure of bolaamphiphile has not been exploited as an optical material yet.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoluminescence by Tyrosine-Containing Bolaamphiphile Self-Assembly

Kwak

Lee

2013

Langmuir

Self Cite

View full text Add to dashboard Cite

Photoluminescent spherical nanostructures were prepared through the self-assembly of a tyrosine-containing bolaamphiphilic molecule, and their antenna effect was examined. The photoluminescent spherical nanostructures were simply prepared by self-assembly of bolaamphiphile molecules in an aqueous solution in which water-soluble photosensitizers and lanthanide ions were dissolved. The photosensitizers and lanthanide cations were incorporated with the phenol group and the carboxyl end of the tyrosine moiety, respectively. Through fluorescence microscopy and photoluminescence spectroscopy analyses, the various combinations of two lanthanide ions (Eu and Tb) and four photosensitizers were screened for synergetic photoluminescence with bolaamphiphile self-assembly. The bolaamphiphile assembly enhanced the photoluminescence intensity by a factor of around 2 when it was associated with Tb and salicylic acid. This enhancement is driven by the phosphorescence enhancement of the photosensitizer induced by the π-π interactions with the phenol group in tyrosine. These results indicate that the tyrosine-containing bolaamphiphile is a promising molecule that can easily produce a soft nanoscaled host matrix with an antenna effect for photoluminescence.

show abstract

Preparation of polypyrrole microtubules by selective deposition on peptide-decorated microtubular templates

Cited by 2 publications

References 15 publications

Biomimetic Catalytic and Sensing Cascades Built with Two Designer Bolaamphiphilic Self-Assemblies

Biomimetic Catalytic and Sensing Cascades Built with Two Designer Bolaamphiphilic Self-Assemblies

Enhanced Photoluminescence by Tyrosine-Containing Bolaamphiphile Self-Assembly

Contact Info

Product

Resources

About