A Thermostable Protein Matrix for Spectroscopic Analysis of Organic Semiconductors
| Autor: | Shuangqing Wang, David G. Bossanyi, James P. Pidgeon, John E. Anthony, Daniel Polak, David J. K. Swainsbury, George A. Sutherland, Andrew Hitchcock, Frank C. Spano, Andrew J. Musser, Dirk B. Auman, C. Neil Hunter, P. Leslie Dutton, Jenny Clark |
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| Rok vydání: | 2020 |
| Předmět: |
Protein design
Nanoparticle Peptide 02 engineering and technology Xanthophylls 010402 general chemistry 01 natural sciences Biochemistry Catalysis Matrix (chemical analysis) Colloid and Surface Chemistry chemistry.chemical_classification Aqueous solution Molecular Structure Protein Stability Spectrum Analysis Temperature Proteins General Chemistry Chromophore 021001 nanoscience & nanotechnology Biocompatible material Combinatorial chemistry 0104 chemical sciences Organic semiconductor chemistry Semiconductors 0210 nano-technology Peptides |
| Zdroj: | Journal of the American Chemical Society. 142(32) |
| ISSN: | 1520-5126 |
| Popis: | Advances in protein design and engineering have yielded peptide assemblies with enhanced and non-native functionalities. Here, various molecular organic semiconductors (OSCs), with known excitonic up- and down-conversion properties, are attached to a de novo-designed protein, conferring entirely novel functions on the peptide scaffolds. The protein-OSC complexes form similarly sized, stable, water-soluble nanoparticles that are robust to cryogenic freezing and processing into the solid-state. The peptide matrix enables the formation of protein-OSC-trehalose glasses that fix the proteins in their folded states under oxygen-limited conditions. The encapsulation dramatically enhances the stability of protein-OSC complexes to photodamage, increasing the lifetime of the chromophores from several hours to more than 10 weeks under constant illumination. Comparison of the photophysical properties of astaxanthin aggregates in mixed-solvent systems and proteins shows that the peptide environment does not alter the underlying electronic processes of the incorporated materials, exemplified here by singlet exciton fission followed by separation into weakly bound, localized triplets. This adaptable protein-based approach lays the foundation for spectroscopic assessment of a broad range of molecular OSCs in aqueous solutions and the solid-state, circumventing the laborious procedure of identifying the experimental conditions necessary for aggregate generation or film formation. The non-native protein functions also raise the prospect of future biocompatible devices where peptide assemblies could complex with native and non-native systems to generate novel functional materials. |
| Databáze: | OpenAIRE |
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