Recent demonstration in augmenting the efficiency of aqueous Rhodamine dye lasers using cucurbituril (CB), a deaggregating and photostabilizing host, has drawn interest in the synthesis and characterization of spectroscopic grade CB in larger quantities. Synthesis of cucurbituril group of macrocycles always leads to the formation of various homologues of CB[n]s (n=5–7) with CB as the minor product. The literature procedure has been optimized to get pure CB in 12–14% yield by fractional crystallization and the purity was checked by NMR, MS and spectrophotometric titration. Laser performances of the synthesized and commercial CB sample as an additive were evaluated using Nd-YAG (532 nm) pumped Rhodamine B aqueous dye lasers and comparable results were obtained.
Volume 96, 2022
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