Abstract (E)-1, 2-bis (2-thienyl) vinylene (TV),(E)-1, 2-bis (3-octyl-2-thienyl) vinylene (TOV),(E)-1, 2-bis (3-(2-ethylhexyl)-2-thienyl) vinylene (T2EHV), and (E)-1, 2-bis-[2, 2'- bithienyl] vinylene (BTV) have been synthesized by a combination of formylation reaction and Mc Murry dimerization. UV–Vis spectra of BTV showed the longest wavelength absorption, TOV and T2EHV showed a bathochromic shift to the red compared with TV, ...