In Situ Observation of the Emission Characteristics of Zeolite-Hosted Silver Species During Heat Treatment

• Published in: Chemphyschem Vol. 11; no. 8; pp. 1627 - 1631
• Main Authors: De Cremer, Gert, Coutiño-Gonzalez, Eduardo, Roeffaers, Maarten B. J., De Vos, Dirk E., Hofkens, Johan, Vosch, Tom, Sels, Bert F.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 07.06.2010; WILEY‐VCH Verlag; Wiley
• Subjects: autoreduction; Chemistry; Exact sciences and technology; General and physical chemistry; heat-induced clustering; Hot Temperature; Ion-exchange; luminescence; Microscopy, Fluorescence; Silver - chemistry; silver clusters; Surface physical chemistry; Ultraviolet Rays; zeolites; Zeolites - chemistry; Zeolites: preparations and properties; Heat treatment; In situ; Luminescence; Atomic cluster; Transition metal; Zeolite; Molecular sieve; Chemical reduction; Silver; Metal cluster; zeolites; silver clusters; autoreduction; heat-induced clustering luminescence
• ISSN: 1439-4235; 1439-7641
• DOI: 10.1002/cphc.201000065

The influence of heat treatment on the evolution of luminescence in silver exchanged zeolites is investigated under controlled atmosphere by using in situ fluorescence microscopy (see figure). The results indicate that the stable yellow Ag3n+ emitter is most efficiently created in a dry zeolite Y host. In zeolite A, the clusters interact with neighboring clusters or with water, decreasing the overall yellow luminescence.