Tuning the efficiency of multi-step energy transfer in a host–guest antenna system based on a chalcogenide semiconductor zeolite through acidification and solvation of guests. Issue 44 (23rd October 2015)

• Record Type: Journal Article
• Authors: Hu, Dan-Dan; Wang, Le; Lin, Jian; Bu, Fei; Wu, Tao
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 44(2015)
• Page Start: 11747
• Page End: 11753
• Publication Date: 2015-10-23
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5tc02654g
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : We report the tuning of energy transfer efficiency through acidification and solvation of guest molecules in a chalcogenide-based host–guest system. Abstract : We report a new multi-step energy transfer process in a host–guest antenna system based on a chalcogenide semiconductor zeolite (coded as RWY). The multi-step vectorial energy transfer assay was fabricated by encapsulating both proflavine ions (PFH + ) and pyronine ions (Py + ) into the RWY porous framework, serving as a UV-vis light-harvesting host. The ultraviolet high-energy excitation absorbed by the RWY host was channeled to the PFH + ions and then onto the Py + ions to give rise to visible-light emission. The steady-state fluorescence and fluorescent dynamics of emission revealed successfully the process of multi-step vectorial energy transfer occurring in the RWY⊃(PFH + &Py + ) host–guest antenna system. Moreover, the post treatment of guest ions, such as further acidification of the PFH + ions and solvation of the guests, was also investigated to tune energy transfer efficiency in such host–guest antenna systems. The current study shows that deep protonation of PFH + as well as solvation of guest ions can dramatically enhance energy transfer efficiency between the RWY host and PFH +, and even between PFH + and Py +, much higher than that in an untreated host–guest antenna system.