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Formation and origin of multicenter photoluminescence in zeolite-based carbogenic nanodots

Abstract

Carbogenic nanodots (CNDs) are inspiring intensive research efforts owing to their excellent optical properties, however, their chemical structure and photoluminescent origin are still under study. Here, CNDs with interesting multicenter photoluminescence (PL) have been successfully prepared by pyrolysis of organo-templated zeolites. The simultaneously observed excitation-dependent blue and excitation-independent green PL, as well as an uncommon ultraviolet excited cyan emission are quite different from the known multicenter emissive CNDs. To get a thorough understanding of the formation of CNDs and their PL origins, the structure characterization coupled with femtosecond transient absorption and fluorescence lifetime spectra analyses have been employed to study such PL behavior. The results show that as-prepared CNDs are an ensemble of three main batches with different polarities, which are composed by a combination of six small fluorophores with diverse ratios. The multicenter PL origins from a competition among the conjugated domain fluorophores and the surface occupied functional group fluorophores. This work provides a comprehensive insight into the origin of multicenter photoluminescence in zeolite-based CNDs.

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Publication details

The article was received on 12 Mar 2018, accepted on 14 May 2018 and first published on 15 May 2018


Article type: Paper
DOI: 10.1039/C8NR02043D
Citation: Nanoscale, 2018, Accepted Manuscript
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    Formation and origin of multicenter photoluminescence in zeolite-based carbogenic nanodots

    B. Wang, Y. Mu, H. Yin, Z. Yang, Y. Shi and J. Li, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR02043D

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