Electronic transitions in Rb2+ dimers solvated in helium

Abstract

We have measured depletion spectra of the heteronuclear (85Rb87Rb+) dimer cation complexed with up to 10 He atoms. Two absorption bands are observed between 920 and 250 nm. The transition into the repulsive 12Σu+ state of HeRb2+ gives rise to a broad feature at 790 nm (12,650 cm−1); it exhibits a blueshift of 98 cm−1 per added He atom. The transition into the bound 12Πu state of HeRb2+ reveals vibrational structure with a band head at ≤ 15,522 cm−1, a harmonic constant of 26 cm−1, and a spin–orbit splitting of ≤ 183 cm−1. The band experiences an average redshift of − 38 cm−1 per added He atom. Ab initio calculations rationalize the shape of the spectra and spectral shifts with respect to the number of helium atoms attached. For a higher number of solvating helium atoms, symmetric solvation on both ends of the Rb2+ ion is predicted.

Bonding Nature between Noble Gases and Small Gold Clusters

“…The noble gas inertness is exploited in optical spectroscopy by messenger techniques, 1 matrix isolation of reactive species, 2 or solvation in He nanodroplets. 3 In mass spectrometry, noble gas atoms are used as thermalization agents in laser ablation 4 and ion trapping via collisional cooling. 5 Recent developments in surface science use noble gas physisorption as a probe to monitor the photocatalytic activity of transition metal oxide surfaces 6 or to deposit catalytically active nanoparticles.…”

“…The octet rule simultaneously rationalizes the stability of compounds such as CO 2 , NaCl, and MgO, which adopt the same electronic configuration to gain stability. The noble gas inertness is exploited in optical spectroscopy by messenger techniques, matrix isolation of reactive species, or solvation in He nanodroplets . In mass spectrometry, noble gas atoms are used as thermalization agents in laser ablation and ion trapping via collisional cooling .…”

Chemistry and physics of dopants embedded in helium droplets

“…Besides C 60 , we performed UV‐vis spectroscopy on cations of corannulene (Gatchell et al, 2019), anthracene (Meyer et al, 2021), and dimer cations of cesium (Kranabetter et al, 2019), and rubidium (Albertini, Martini, et al, 2021). Currently, a new setup is under construction that enables the determination of the absorption spectra of a mass‐selected ion by the emergence of the photoproduct instead via depletion of the precursor ion.…”

Potential Energy Surface and Bound States of Ne–Li2+(X2Σg+) van der Waals Complex Based on Ab Initio Calculations

“…To study the spectroscopic and dynamic properties of a heterotrimer system such as Ne–Li 2 + , it is necessary to construct the potential energy surface (PES), which describes the interactions within the molecular system. In the past decade, extensive research both experimentally and theoretically has been performed to determine the ground-state PES of the Rg–M 2 + vdW complexes. − …”

“…In the past decade, extensive research both experimentally and theoretically has been performed to determine the ground-state PES of the Rg–M 2 + vdW complexes. 14 − 21 …”