화학공학소재연구정보센터
Chemistry Letters, Vol.43, No.12, 1870-1872, 2014
Novel Panchromatic Absorption Material, Isoindigo-based A-pi-A-pi-A Small Molecule
One A-pi-A-pi-A small molecule [I(TPTA)(2)], containing two planar acceptor units, isoindigo, and 2,4,6-tripheny1-1,3,5-triazine (TPTA) with thiophene as bridge, was synthesized by the Suzuki coupling reaction. The obtained molecule exhibits panchromatic absorption between 300 and 720nm with a large half band width up to 350 urn in thin solid film The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of [I(TPTA)(2)] are -5.50 and -3.82 eV. Density functional theory (DFT) calculations indicated that the structure of [I(TPTA)(2)] is quite planar and that the electron density is mainly delocalized over the central isoindigo and thiophene units.