Facile synthesis, x ray single crystal and optical characterizations of Cu-diphenylphosphino-methane organic crystalline semi-conductors

In this paper, facile synthesis process of a new organic semiconductor single crystals C38H36Cl2N2CuP2 (Cu-dppm) was reported. Single crystal X-ray structure determinations are recorded for cu-dppm (5a) complex, crystallize as poly crystalline form in the monoclinic space group P2(1)/n with a= 9.502(2) angstrom, b=8.128(3) angstrom, c=16.112(6) A. In (Cu-dppm), the N(30)-C(31), C(34)-N(43) and N(43)-C(44) bond lengths could be categorized as one short (1.257 angstrom) and two long (1.472-1.475 angstrom) respectively. A short angle (71.756(0)) of P(1)-Cu(17)-P(3) was observed. In addition, because of the growth process, a set of copper complexes were formed. Elemental analysis (EA), IR, H-1-NMR, P-31-NMR spectroscopic data and FAB mass spectra were used for more structural data analysis. The absorbance and transmittance spectra were measured for the obtained (Cu-dppm) organic complex (5a) over the incident photon energy range, 1.55-2.98eV (visible range wavelengths from lambda= 400- 800 nm). The results of the absorptivity (epsilon(max)=729.95 and 349.39 Lmol(-1)cm(-1)) were calculated in order to determine the optical band gap of Cu-dppm (5a) complex at lambda(mix) (436 and 580nm) respectively. The optical constant, i.e, refractive index of the organic semiconductor (5a) has been calculated as 1.265 at 2.86 eV.