Study of new facile deoxygenation methods in cyclodextrin induced room temperature phosphorescence

The traditional deoxygenation techniques in cyclodextrin induced room temperature phosphorescence (CD-RTP) include N2(g) purging and Na2SO3 chemical deoxygenation. In this paper, we propose two new deoxygenation methods in which oxygen is eliminated by hydrogen gas and carbon dioxide produced by the reactions Zn(s)/HCl and Na2CO3/HCl in the measuring media. With 1-bromocyclohexane (BCH) as an external heavy atom perturber and phenanthrene as a model compound compared with traditional deoxygenation techniques, the two new methods: (1) are facile and do not need any complicated supplementary equipment; (2) are rapid, deoxygenation time needed is only 1–2 min; (3) have a wider acidic condition, which is a supplement of chemical deoxygenation by Na2SO3; (4) can maintain RTP signal without decay for 10 min; (5) have good analytical characteristics.