Synthesis and self-organization characteristics of amide dendrons with focal ferrocenyl moiety

pH-Triggered transition of silk fibroin from spherical micelles to nanofibrils in water

“…The polydispersity factor of the micelles, represented as μ 2 /Γ 2 , where μ 2 is the second cumulant of the decay function and Γ is the average characteristic line width, was calculated by the cumulant method. 11,12 The CD spectra of all of the samples at a concentration of 0.5 wt% were recorded on a JASCO J-715 spectrometer at an ambient temperature of 25 o C. A cylindrical quartz cell with a path length of 0.01 cm was used for the spectral measurements. Each spectrum is presented as the average of four consecutive scans measured at a resolution of 0.1 nm.…”

Self-organization of dendrons with focal pyrene moiety and diacetylene-containing periphery

“…12 When the saturated hydrocarbons such as dodecyl chains were used as the peripheral group, a variety of second generation amide dendrons including the one with a focal pyrene moiety self-assemble into vesicles in aqueous phase. [9][10][11][14][15][16][17] The self-assembled vesicle transforms into the CD-covered nanotube upon CD complexation on the focal pyrene unit. 11 We expected that dendron 7 might also self-assemble into vesicle in water in a fashion similar to the self-assembly of the amide dendrons with saturated alkyl chains as peripheral groups.…”

“…We have investigated the self-assembly characteristics of the amphiphilc amide dendrons having peripheral hydrophobic chains, which self-assemble into well-defined structures such as fibers and ribbons in organic solvents by using hydrogen bonding and hydrophobic interactions as a main driving force. [9][10][11][12][13][14][15][16][17][18][19][20] In addition, in aqueous medium, the amide dendrons self-organize into vesicles and cylindrical micelles particularly depending on the nature of the functional group at the focal point of the dendron. 10 Our recent finding of the supramolecular transformation of self-assembled structures from vesicles to nanotubes induced by the host-guest complexation of the focal pyrene group of the amide dendron and cyclodextrins (CDs) 11 highlighted the importance of guiding the self-assembly process of the dendrons through their structural tuning.…”

Fluorescent silk fibroin nanoparticles prepared using a reverse microemulsion

“…The polydispersity factor of the particles, represented as μ 2 /Γ 2 , where µ 2 is the second cumulant of the decay function and Γ is the average characteristic line width, was calculated by the cumulant method. 23 CONTIN algorithms were used in the Laplace inversion of the autocorrelation function to obtain the size distribution. Fourier transform infrared (FT-IR) spectroscopy was performed using a Bruker VERTEX 80v FT-IR spectrometer.…”