title: Near-infrared spectroscopy of LiNH3: first observation of the electronic spectrum.
abstract: Electronic spectra of LiNH(3) and its partially and fully deuterated analogues are reported for the first time. The spectra have been recorded in the near-infrared and are consistent with two electronic transitions in close proximity, the Ã(2)E-X(2)A(1) and B(2)A(1)-X(2)A(1) systems. Vibrational structure is seen in both systems, with the Li-N-H bending vibration (ν(6)) dominant in the Ã(2)E-X(2)A(1) system and the Li-N stretch (ν(3)) in the B(2)A(1)-X(2)A(1) system. The prominence of the 6(0)(1) band in the Ã(2)E-X(2)A(1) spectrum is attributed to Herzberg-Teller coupling. The proximity of the B(2)A(1) state, which lies a little more than 200 cm(-1) above the Ã(2)E state, is likely to be the primary contributor to this strong vibronic coupling.
authors: Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom.
authors: Luigi
authors: L
authors: Varriale
authors: Nitika
authors: N
authors: Bhalla
authors: Nicola M
authors: NM
authors: Tonge
authors: Andrew M
authors: AM
authors: Ellis
authors: Timothy G
authors: TG
authors: Wright