The action of light on undersaturated and supersaturated vapors of carbon disulfide has been investigated using a batch photochemical reactor and a thermal diffusion cloud chamber, respectively. Photoinduced nucleation was observed in each case. In the batch reactor enough sulfur was produced to nucleate and grow a sulfur aerosol. A model for the photoinduced nucleation of supersaturated carbon disulfide is proposed based upon the photochemical production and subsequent nucleation of sulfur. The model predictions compare well with observed nucleation delay time and nucleation rate data. A variation of the model utilizing diradical polymerization instead of nucleation is used to explain photoinduced nucleation results in the literature involving dilute solutions of carbon disulfide in supersaturated ethanol vapor.
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Industrially distilled water was further distilled three more times. First from an alkaline permanganate bath followed by a second distillation. Finally, this water was distilled a third time under helium, and the vapor passed through a quartz tube, which was irradiated with UV light of the same wavelengths used in the experiment, into the TDCC for use in the PIN experiments. Interestingly, when the plain industrially distilled water was used for same experiments with no further purification, the results were the same.
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