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Triplet State Processes in Aqueous Colloidal Dispersions of Polycyclic Aromatic Hydrocarbons at Room Temperature

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A unique and facile means of producing room-temperature phosphorescence (RTP) from colloidal or microcrystalline suspensions of aromatic molecules in aqueous media is reported. Unlike previously reported RTP techniques, colloidal RTP is insensitive to quenching by dissolved oxygen. Delayed fluorescence was observed from several nonphosphorescent species. Potential uses of the technique are for the determination of the solubility of highly insoluble compounds and the ability to distinguish between suspended and dissolved matter.

Keywords: Delayed fluorescence; Microcrystalline suspensions; Room-temperature phosphorescence

Document Type: Research Article


Affiliations: 1: Seton Hall University, Department of Chemistry, South Orange, New Jersey 07079; present address: Kratos Analytical Instruments, Ramsey, NJ 07446 2: Seton Hall University, Department of Chemistry, South Orange, New Jersey 07079

Publication date: May 1, 1985

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