Structural and electronic properties of extremely long perylene bisimide nanofibers formed through a stoichiometrically mismatched, hydrogen-bonded complexation.
Extremely long nanofibers, whose lengths reach the millimeter regime, are generated via co-aggregation of a melamine-appended perylene bisimide semiconductor and a substituted cyanurate, both of which are ditopic triple-hydrogen-bonding building blocks; they co-aggregate in an unexpected stoichiometrically mismatched 1:2 ratio. Various microscopic and X-ray diffraction studies suggest that hydrogen-bonded polymeric chains are formed along the long axis of the nanofibers by the 1:2 complexation of the two components, which further stack along the short axis of the nanofibers. The photocarrier generation mechanism in the nanofibers is investigated by time-of-flight (TOF) experiments under electric and magnetic fields, revealing the birth and efficient recombination of singlet geminate electron-hole pairs. Flash-photolysis time-resolved microwave conductivity (FP-TRMC) measurements revealed intrinsic 1D electron mobilities up to 0.6 cm(2) V(-1) s(-1) within nanofibers.
Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
Shiki
S
Yagai
Tomohiro
T
Seki
Haruno
H
Murayama
Yusuke
Y
Wakikawa
Tadaaki
T
Ikoma
Yoshihiro
Y
Kikkawa
Takashi
T
Karatsu
Akihide
A
Kitamura
Yoshihito
Y
Honsho
Shu
S
Seki
D006860:Hydrogen Bonding; D007094:Imides / Q000737:chemistry*; D015394:Molecular Structure; D057139:Nanofibers / Q000737:chemistry*; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D012666:Semiconductors
D007094:Imides; C510697:perylene bisimide; D010569:Perylene