Piezochromic behaviour of regioregular poly(3-hexylthiophene-2,5-diyl) and poly(5, 8-dihexadecyloxyanthraquinone-1,4-diyl)

Head-to-tail regioregular poly(3-hexylthiophene), HT-P3HexTh, and poly(5,8-dihexadecyloxyanthraquinone-1,4-diyl), P(5,8-OC16H33-1,4-AQ), showed piezochromism at high pressures (5-11 GPa). The yellow colour (lambda (max) = 520 nm) of P(5,8-OC16H33-1,4-AQ) at ambient pressure turned to dark red (lambda (max) = 625 nm) at 11 GPa. (C) 2001 Elsevier Science Ltd. All rights reserved.