Supramolecular self-assembly of bacteriochlorophyll c molecules in aerosolized droplets to synthesize biomimetic chlorosomes

被引:9
|
作者
Shah, Vivek B. [1 ]
Ferris, Chloe [1 ,2 ]
Orf, Gregory S. [3 ,4 ]
Kavadiya, Shalinee [1 ]
Ray, Jessica R. [5 ,8 ]
Jun, Young-Shin [5 ]
Lee, Byeongdu [6 ]
Blankenship, Robert E. [3 ,4 ,7 ]
Biswas, Pratim [1 ]
机构
[1] Washington Univ, Dept Energy Environm & Chem Engn, Aerosol & Air Qual Res Lab, St Louis, MO 63130 USA
[2] Johns Hopkins Univ, Dept Chem & Biomol Engn, Baltimore, MD 21218 USA
[3] Washington Univ, Dept Biol, Campus Box 1137, St Louis, MO 63130 USA
[4] Washington Univ, Dept Chem, St Louis, MO 63130 USA
[5] Washington Univ, Dept Energy Environm & Chem Engn, St Louis, MO 63130 USA
[6] Argonne Natl Labs, Lemont, IL USA
[7] Washington Univ, Photosynthet Antenna Res Ctr, St Louis, MO 63130 USA
[8] Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA
关键词
Self-assembly; Bacteriochlorophyll c; Electrospray atomization; Chlorosome; CAROTENOID BIOSYNTHESIS; NANOSTRUCTURED TIO2; ANTENNA COMPLEXES; ORGANIZATION; NANOPARTICLES; ELECTROSPRAY; DEPOSITION; MEMBRANE;
D O I
10.1016/j.jphotobiol.2018.04.032
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The unique properties of chlorosomes, arising out of the self-assembled bateriochlorophyll (BChl) c structure, have made them attractive for use in solar cells. In this work, we have demonstrated the self-assembly of BChl c in aerosolized droplets to mimic naturally occurring chlorosomes. We compare two different methods for self-assembly of BChl c, one using a single-solvent and the other using two-solvents, and demonstrate the superiority of the two-solvent method. Results show that the self-assembled BChl c sprayed at different concentrations resulted in a varying red shift of 69-75 nm in absorption spectrum compared to the solution, which has peak at 668 nm corresponding to the monomeric BChl c. The sample fluoresces at 780 nm indicating a quality of self-assembly comparable to that observed in naturally occurring chlorosomes. In order to mimic chlorosomes, solution containing BChl c, BChl a, lipids and carotenes in same proportion as in chlorosomes is sprayed. The resulting self-assembly has an absorption peak at 750 nm, shifted by 82 nm compared to that of monomers and the fluorescence peak at 790 nm. Thus in presence of lipids and carotenes, both the absorption and fluorescence peaks are red shifted. Further, using grazing incidence small angle X-ray scattering (GISAXS), we characterized the deposited films, and the 2D X-ray scattering patterns of sample clearly indicate the distinct lamellar structure as present in chlorosomes. The results of this work provide new insights into self-assembly in aerosolized droplets, which can be used for assembling a wide range of molecules.
引用
收藏
页码:161 / 168
页数:8
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