The photochemistry of NCS- in solution

M. Luria*, A. Treinin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The photochemistry of NCS- was investigated at wavelengths within its charge-transfer-to-solvent (CTTS) absorption band. Only a small yield of solvated electrons was detected; most of the excited ions dissociate to give CN- (or HCN) + S pairs, which undergo efficient cage recombination. The increase of the quantum yield with NCS- concentration is ascribed to self-scavenging: NCS- scavenges the sulfur atom from the cage. This mechanism is verified by the use of allyl alcohol as a foreign scavenger for S atoms. The photolysis is strongly affected by varying the acidity around pH 7.5. This is attributed to acid-base equilibrium involving the excited ion.

Original languageEnglish
Pages (from-to)305-308
Number of pages4
JournalJournal of Physical Chemistry
Volume72
Issue number1
DOIs
StatePublished - 1968

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