Novel PPV/mesoporous organosilica composites: influence of the host chirality on a conjugated polymer guest.
The conjugated polymer poly(p-phenylenevinylene) (PPV) was polymerized in the pores of chiral nematic mesoporous organosilica to give a composite film showing the strong characteristic fluorescence of PPV as well as the iridescence due to the photonic band gap of the host material. Detailed circular dichroism (CD) studies reveal a chiral structure of the polymer within the pores. These new fluorescent materials undergo fluorescence quenching upon exposure to electron deficient aromatics such as 2,4,6-trinitrotoluene (TNT), indicating that they may be useful for developing chemical sensors.
Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada.
S Hessam M
SH
Mehr
Michael
M
Giese
Hao
H
Qi
Kevin E
KE
Shopsowitz
Wadood Y
WY
Hamad
Mark J
MJ
MacLachlan