Laser spectroscopy of iridium monoboride

Abstract

High resolution laser induced fluorescence spectrum of IrB in the spectral region between 545 and 610 nm has been recorded and analyzed. Reacting laser-ablated iridium atoms with 1% B(2)H(6) seeded in argon produced the IrB molecule. This is the first experimental observation of the IrB molecule. Four vibronic transition bands, (v,0) with v=0-3 of an electronic transition system, have been observed. Spectra of all four isotopic molecules, (191)Ir(10)B, (193)Ir(10)B, (191)Ir(11)B, and (193)Ir(11)B, were recorded. Isotopic relationships confirmed the carrier of the spectra and the vibrational quantum number assignment. Preliminary analysis of rotational lines showed that these vibronic bands are with Omega' = 2 and Omega" = 3. The electronic transition identified is assigned as the [16.5](3)Pi(2)-X(3)Delta(3) system. Partially resolved hyperfine structure which conforms to the Hund's case a(beta) coupling scheme has been observed and analyzed. The bond length r(0) of the lower X(3)Delta(3) state of IrB was determined to be 1.7675 A.

High resolution laser spectroscopy of the [20.6]0.5–X2Σ+ transition of nickel monoboride, NiB

“…The six bands analyzed by Balfour et al [7], five from vibrational levels of the [19.7] 2 R + state and one from the [22.05] 2 P state, all involved the same lower state, X 2 R + v = 0, with the combination differences, R(N À 1) À P(N + 1), of all six bands in good agreement. Although the lower state of the single band analyzed by Zhen et al [8] was assigned as the same X 2 R + v = 0 state observed by Balfour et al [7], there was a large discrepancy in the lower state combination differences.…”

“…The diatomic transition metal borides, RhB [1], IrB [2], CoB [3], PtB [4], PdB [5], RuB [6] and NiB [7,8] have all been studied using laser spectroscopy.…”

A high resolution visible spectrum of iridium monophosphide

“…Only five species, IrO [16], IrC [17], IrN [18], IrF [19], and IrB [20] have been reported to date. The current study on IrP represents only the second reported Irmonopnictide to be observed.…”

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

“…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].…”