The high-resolution laser induced fluorescence spectra of tungsten mononitride WN and rhenium mononitride ReN have been recorded in a laser ablation/molecular beam spectrometer. The field free spectrum of the (0,0)A 4Π 3/2-X 4Σ 1/2 - band system of 186WN has been analyzed to produce B ″, B ′, and γ ″ values of 0.4659(2), 0.4554(2), and 0.0518(1) cm -1, respectively. The permanent electric dipole moments μ for the X 4Σ 1/2 - and A 4Π 3/2 state were determined to be 3.77(18) and 2.45(3) D, respectively, from the analysis of the optical Stark effect. The (0,0)[26.0]0 +-X0 + band system of ReN was recorded in the presence of a variable static electric field. The ground and excited state electric dipole moments of 187ReN were determined to be μ(X0 +)=1.96(8)D and μ([26.0]0 +)=3.53(4)D. Splittings in the field free 187ReN spectrum were analyzed to produce 187Re(I=5/2) nuclear electric quadrupole coupling constants e 2Qq 0 of -0.0304(8) and 0.0328(9) cm -1 for the X0 + and [26.0]0 + states, respectively. A molecular orbital correlation model is used to interpret the observation and a comparison is made to CrN and MoN.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry