NON-PROTECTED FLUID ROOM-TEMPERATURE PHOSPHORESCENCE OF SEVERAL NAPHTHALENE DERIVATIVES

In our previous work, we reported that with TINO3 as a heavy atom pert urber and Na2SO3 as a deoxygenator, room temperature phosphorescence ( RTP) emission of dansyl chloride and its amino acid derivatives can be induced directly from their aqueous solution without a protective med ium. Is this kind of fluid luminescence phenomenon unique for the dans yl chloride compounds? The present work has shown that many naphthalen e derivatives can also exhibit RTP emission in their aqueous solutions under similar conditions in the absence of a protective medium. Such an RTP emission phenomenon could be denoted as nonprotected fluid room temperature phosphorescence (NP-RTP). In order to further understand this new luminescence phenomenon, the substituent group effects and th e favorable chemical structure of compounds for NP-RTP emissions are d iscussed in detail. (C) 1998 Elsevier Science B.V. All rights reserved .