H-shaped OPE/OPV oligomers: a new member of 2D-conjugated fluorophore cores.
A new class of two-dimensional (2D), pi-conjugated, skewed H-shaped co-oligomers of phenylene vinylene and phenylene ethynylene (11a- d, termed H-mers) were synthesized using Sonogashira coupling and Wittig-Horner reactions as the key steps. Electronic and spectroscopic properties of the H-mers were investigated by UV-vis absorption, fluorescence spectroscopic techniques, and ab initio calculations (HF/3-21G). Two amino-containing functional H-mers (11b and 11d) were found to exhibit appealing fluorescence sensitivity to selected Brønsted acids and transition-metal ions.
Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.
Ningzhang
N
Zhou
Li
L
Wang
David W
DW
Thompson
Yuming
Y
Zhao