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Structure and principles of self-assembly of giant“sea urchin”type sulfonatophenyl porphine aggregates

Nano Research 2022年第6期15卷 5527-5537页

作者： Marijus Pleckaitis Fayez Habach Lukas Kontenis Gábor Steinbach Greta Jarockyte Agne Kalnaityte IldikóDomonkos Parveen Akhtar Mehdi Alizadeh Saulius Bagdonas Vitalijus Karabanovas GyőzőGarab ricardas rotomskis Virginijus Barzda Laser Research Center Faculty of PhysicsVilnius UniversitySauletekio av.10Vilnius LT-10223Lithuania Biomedical Physics Laboratory National Cancer InstituteP.Baublio str.3bVilnius LT-08406Lithuania Department of Chemical and Physical Sciences University of Toronto Mississauga3359 Mississauga RdMississauga L5L 1C6Canada Light Conversion Keramiku str.2BVilnius LT-10233Lithuania Cellular Imaging Laboratory Biological Research CentreEötvös Loránd Research NetworkTemesvári körút 62Szeged 6726Hungary Institute of Biophysics Biological Research CentreEötvös Loránd Research NetworkTemesvári körút 62Szeged 6726Hungary Biofotonika Research and Development Ltd. Dózsa u.7Szeged 6720Hungary Institute of Plant Biology Biological Research CentreEötvös Loránd Research NetworkTemesvári körút 62Szeged 6726Hungary Department of Chemistry and Bioengineering Vilnius Gediminas Technical UniversitySauletekio av.11Vilnius LT-10223Lithuania Department of Physics Faculty of ScienceUniversity of OstravaChittussiho 10Ostrava CZ-71000Czech Republic Department of Physics University of Toronto60 St.George St.TorontoToronto M5S 1A7Canada

Principles of molecular self-assembly into giant hierarchical structures of hundreds of micrometers in size are studied in aggregates of meso-tetra(4-sulfonatophenyl)porphine(TPPS_(4)).The aggregates form a central tubular core,which is covered with radially protruding filamentous non-branching *** filaments cluster and orient at varying angles from the core surface and some filaments form *** to shape resemblance,the structures are termed giant sea urchin(GSU)*** resolved fluorescence microscopy reveals J-and H-bands of TPPS_(4)aggregates in both the central core and the *** fluorescence of the core is quenched while filaments exhibit strong *** drying,the filament fluorescence gets quenched while the core is less affected,showing stronger relative *** linear dichroism(FDLD)microscopy reveals that absorption dipoles corresponding to J-bands are oriented along the filament *** comparison of FDLD with scanning electron microscopy(SEM)reveals the structure of central core comprised of multilayer ribbons,which wind around the core axis forming a *** second-harmonic generation(SHG)and thirdharmonic generation microscopy exhibits strong signal from the filaments with nonlinear dipoles oriented close to the filament axis,while central core displays very low SHG due to close to centrosymmetric *** chiral nonlinear susceptibility points to helical arrangement of the *** investigation shows that TPPS_(4)molecules form distinct aggregate types,including chiral nanotubes and nanogranular aggregates that associate into the hierarchical GSU structure,prototypical to complex biological *** chiral TPPS_(4)aggregates can serve as harmonophores for nonlinear microscopy.

关键词： meso-tetra(4-sulfonatophenyl)porphine(TPPS_(4))aggregates self-assembly nanostructures harmonophores polarimetric second harmonic generation microscopy third harmonic generation microscopy

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