Laser spectroscopy of the A³Φ_i-X³Φ_i and B³Φ₄-X³Φ₄ transitions of iridium monofluoride (IrF) This article is part of a Special Issue on Spectroscopy at the University of New Brunswick in honour of Colan Linton and Ron Lees.

Abstract

Laser-induced fluorescence spectra of iridium monofluoride (IrF) have been obtained at both low and high resolution. Two transitions have been observed; based on the rotational analysis of the high-resolution spectra, they have been assigned as A3Φi-X3Φi and B3Φi-X3Φi. For the X (ground) and B states, only the lowest Ω = 4 components have been observed, while for the A state, the two lowest components, Ω = 4 and 3, were detected. A global fit to all of the high-resolution data (six bands of A-X and five of B-X) yielded a complete set of molecular constants for all three states of both 191IrF and 193IrF. The v = 3 level of the A3Φ4 state was found to be heavily perturbed and many extra lines belonging to the perturbing state were observed for each isotopologue. A deperturbation analysis showed that the perturber is an Ω = 5 state, and molecular parameters for this state were obtained.

Hyperfine structure and Stark effect in the [18.0] 4 − X3Φ4 transition of iridium hydride, IrH and [18.2] 4 − X3Φ4 transition of iridium deuteride, IrD

“…Rotational analysis showed that the ground state had Ω=4 which was probably the lowest energy component of an inverted 3 Φ state. This follows the pattern observed for IrF [2,3], and the isovalent molecules CoH [4] and CoF [5][6][7], all of which have a 3 Φ4 ground state.…”

Rotational and hyperfine structure in the [17.6]2.5–X2.5 and [23.3]2.5–X2.5 transitions of iridium monoxide, IrO

“…Iridium monoxide was produced in the same University of New Brunswick laser ablation/molecular beam source used to investigate IrP [7], IrF [9] and IrH/D [11]. An iridium rod was ablated with approximately 7 mJ of 355 nm radiation using the third harmonic of a Lumonics HY-400 Nd:YAG laser.…”

“…Since these complexes contain active iridium-oxygen moieties it is important to better understand the bonding in the diatomic systems. To date, seven diatomic iridium containing molecules have been studied experimentally: IrO [1][2][3], IrC [4,5], IrN [5], IrP [6,7], IrB [8], IrF [9,10], and IrH/D [11].…”

Electronic transitions of iridium monoboride

“…7,8 . Spectroscopic properties of diatomic molecules formed with Ir and main group elements of the 2p period have recently been investigated, which include IrB 9 , IrC 10 , IrN 11 , IrO 12 , and IrF 13 . For iridium monoboride (IrB), our group using laser induced fluorescence spectroscopy recorded vibrational bands of electronic transition in the visible region between 545nm and 610nm, identified the ground X 3  3 state, and reported the [16.5] 3  2 -X 3  3 transition.…”