Electrospinning of polystyrene/dicyanopyrazine-linked porphyrin nanofibers.
We have fabricated fluorescing polystyrene/dicyanopyrazine-linked porphyrin (PS/4-TDCPP) nanofibers using the electrospinning technique. UV-vis spectroscopy shows a strong Soret band and two relatively weak Q bands from the PS/4-TDCPP films and fibers, and reveals that the 4-TDCPP molecules are homogeneously dispersed in the films and fibers. Scanning electron microscopy (SEM) reveals the effect of solvent and collecting distance on the morphology of the electro-spun PS/4-TDCPP fibers. Fibers spun from a 50% dimethlyformamide (DMF), 50% methylethylketone (MEK) solution have ultra-fine structures with an average diameter of 300 nm. In the case of fibers from pure DMF and DMF:MEK (1:3) solutions, beads are formed along the length of the fibers. Variation of the collecting distance from 20 to 30 cm does not induce significant differences in the morphology of the electro-spun PS/4-TDCPP fibers. However, at a collecting distance of 15 cm, many beads are formed along the fibers. Acid-sensing capability of the PS/4-TDCPP fibers is demonstrated by fluorescence microscopy.
Department of Fiber and Polymer Engineering and Institute of Nano Science and Technology, Hanyang University, 17 Haengdang-Dong, Seongdong-Gu, Seoul 133-791, Korea.
Il Woong
IW
Baek
Ki Hun
KH
Jang
Min Ho
MH
Kim
Heejoon
H
Ahn
D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D011137:Polystyrenes / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D011719:Pyrazines / Q000737:chemistry*
D011137:Polystyrenes; D011166:Porphyrins; D011719:Pyrazines; C066548:cyanopyrazine