Experimental Section Materials methods and instrumentation Device Fabrication and photo

1H NMR (300 MHZ,CDCl3, δ ppm): 8.15(s,1H), 7.91(d,2H, J = 8.12 Hz), 7.56(d,2H, J = 8.30 Hz), 7.21-7.15 (m,6H), 7.11-6.98(m,6H), 6.69(d, 2H, J = 3.21 Hz), 2.80 (t, 4H, J = 7.74 Hz), 1.74-1.63 (m,4H), 1.42-1.26 (m,12H), 0.90 (t, 6H, J = 6.60 Hz); 13C-NMR (75 MHZ, CDCl3, δ ppm):145.52, 144.38, 141.21, 137.44, 134.58, 133.47, 131.32, 126.69, 126.33,124.78, 123.85, 123.73, 123.33, Bleomycin Sulfate 119.94, 31.53, 30.16, 29.67, 28.74, 22.55, 14.06;
MALDI-TOF:m/z[M+] calcd.C50H48N2O2S4,837.19;found:837.49.
FTIR(KBr,cm−1);
3424,3064,2922,2850,2218,1685,1570,1501,1433,1321,1273,1224,1178,957,870,829,791,730,577,520,408.
(E)-2-(5-(4-(bis (4-(5′ –hexyl-2, 2′-bithiophen-5-yl) phenyl) amino) benzylidene)-4-oxo-2-thioxothiazolidin-3-yl) acetic acid (KNS2):
To the acetic acid (7 ml) solution of 4-(bis (4-(5′-hexyl-2, 2′bithiophen-5-yl) phenyl) amino) benzaldehyde (3), (0.113 g, 0.146 mmol) of rhodanine-3-aceticacid (0.070 g, 0.366 mmol) and ammonium acetate (5 mol%) were added and was refluxed well for 4.0 h at 120 °C under nitrogen atmosphere. The organic phase was extracted with CHCl3, washed several times with water (to remove excess of acetic acid and cyanoaceticacid), dried over Na2SO4, solvents were removed by rotary evaporation and was finally purified by column chromatography on silica gel, eluting with chloroform and methanol to afford the compound (KNS2) as a red colored solid. Yield: 0.117 g (84.5%).