Using carbazole as starting material,a carbazole derivative 3-hydroxy methyl-6-(5-formyl-2-thiophene)-N-hexyl carbazole(M)was synthetised by formylation,iodine substitution and Suzuki reaction.The structure was characterized by1 H-NMR,IR and elemental analysis spectra.The photophysical properties of M were investigated by UV-Vis and fluorescence spectroscopies.The results indicated that:as introducing of the thiophene unit,the maximum absorption wavelength of Mred-shifted,and UV-visible spectra results were...