synthesis of a cadmium nitrate complex bearing phosphoramide ligands for application in dye sensitized solar cells

In this study, using ultrasonic method, nanoparticles of a new phosphoramide compound and its cadmium nitrate complex with formula (4-no2-c6h4nh)p(o)cl(nh-c5h4n-2) = l (1), cd(no3)2(l)(ch3oh) (2) were synthesized and characterized by 31p, 1h, 13c nmr, ft-ir, uv-vis and fluorescence spectroscopy the 31p nmr spectra exhibited that compound 1 had a more shielded phosphorus atom while its coordination to the cd(ii) ion caused deshielding of the phosphorus in 2 this was attributed to the electron withdrawing nature of metal atoms from the phosphoryl oxygen atoms coordinated to them the fluorescence spectra of compounds 1 and 2 illustrated that the (max) of emission for phosphoramide 1 was appeared at 382 nm but it was shifted to longer wavelengths (red shift) in complex 2 (4225 nm) the two compounds 1 and 2 were utilized as dyes for absorbing light in dye sensitized solar cells (dsscs) and the efficiencies of the cells were obtained equal to 042 and 054%, respectively comparing the conversion efficiencies of the two dyes illustrated that compound 2 with a smaller band gap yielded a greater efficiency