The band spectrum of silicon monosulphide and its relation to the band spectra of similar molecules

Abstract

In a recent paper (Jevons, Bashford and Briscoe 1937) on the ultraviolet band system of GeO, a survey was made of the band systems of the monoxides and monosulphides of the Group-IV(B) elements which appeared to be analogous to the “Fourth Positive” system (A 1 II -> x 1 Σ) of CO and the well-known ultra-violet systems of CS and SiO It was found that when the observed values of the vibrational coefficients w e and x e w e were plotted against the number of electrons in the molecule two pairs of uninflected curves were obtained for the lower states of the monoxides and monosulphides, these states being probably all 1 Σ ground states, and two similar pairs of curves were obtained for the upper states.

Spectroscopy and molecule opacity investigation on excited states of SiS

“…T . The total internal partition function is calculated with formula (7) by considering all of the vibration-rotation levels in the X 1 Σ + , 1 1 Π and 2 1 Σ + states. The total internal partition function is computed at different temperatures, and the partition function curves of SiS at different surrounding temperatures are provided in Fig.…”

“…5 that the total internal partition function of SiS exhibits a rapid increase as the temperature T rises. As the temperature increases, the Boltzmann factor exp − T i hc kT exhibits exponential growth, leading to a rapid rise in partition functions determined by formula (7). /molecule) 1000 K 100 atm Fig.…”

“…Pioneering experimental studies on the vibronic emission of A 1 Π-X 1 Σ + of SiS were carried out by Barrow and Jevons. [7] Since then, several experimental studies have focused on the spin-allowed transitions E 1 Σ + -X 1 Σ + , D 1 Π-X 1 Σ + and A 1 Π-X 1 Σ + . A series of ultraviolet bands were photographed by Vago and Barrow, [8] and vibrational analyses were carried out to obtain the vibrational constants of E 1 Σ + and D 1 Π. Nair [9] obtained the dissociation energy (D e ) and experimental potential-energy curves (PECs) by employing the Rydberg-Klein-Rees method.…”

Synthesis of Silicon Sulfide by Using CS2 Gas

“…[ 7,8,10,31,45,48] Additionally, SiS shows yellow, orange-red, dark brown, reddish black, and black colors because of its instability at room temperature in an ambient atmosphere. [9,10,41,45] In 1939, Barrow and Jevons [31] reported that SiS could be formed from Si and gaseous CS 2 , although SiS and SiS 2 could not be distinguished by spectroscopic analysis of distilled SiS. Schumb and Bernard [45] reported that SiS was formed by heating a mixture of pure SiS 2 and excess Si at 1123 K, and that SiS was not formed by the reaction between Si and S 2 gas at 1 atm.…”

“…Herein, we use the experimental reports from the evaporation studies [8-10, 41, 46, 47, 50] and the database summarized in HSC Chemistry, [36] as shown in Figure 1. Crystalline SiS has not been reported and solid SiS is formed as an amorphous structure only from condensing gaseous SiS, [3,9,10,31,41,45,50] i.e.,…”