Molecular Nonlinear Optical Properties of Acceptors Substituted 2,2′‐Bipyridine and 1,10‐Phenathroline Complexes of Nickel Dithiolate

摘要: Linear and nonlinear optical properties of two new nickel(diimine)(dithiolate) complexes, nickel(4,4′-dinitro2,2′-bipyridyl)(tfd), Ni(NO2bipy)(tfd), (tfd = 1,2-trifluoromethylethene-1,2-dithiolate) nickel(4,7-diphenyl-1,10-phenathroline)(tfd), Ni(dpphen)(tfd) are reported. Ni(NO2bipy)(tfd) has a potent electronic acceptor substituted on the diimine ligand exhibits an enhanced molecular first hyperpolarizability (β0 −31 × 10−30 esu), which is more than three times greater that −10 esu) Ni(dpphen)(tfd). also possesses longest absorption wavelength, largest solvatochromic shift, one dipole moment changes (-16 debye from ground to excited state) among complexes. Crystal X-ray structure used compared π-bonding central (N=C-C=N)Ni(S-C=C-S) unit with previously known nickel(4,4′-bis(butyloxycarbonyl)-2,2′-bipyridyl)(tfd), Ni(CO2Bubipy)(tfd).