Dual-emissive difluoroboron naphthyl-phenyl β-diketonate polylactide materials: Effects of heavy atom placement and polymer molecular weight

Jelena Samonina-Kosicka, Christopher A. Derosa, William A. Morris, Ziyi Fan, Cassandra L. Fraser

Research output: Contribution to journalArticle

62 Scopus citations

Abstract

Luminescent materials are important for imaging and sensing. Aromatic difluoroboron β-diketonate complexes (BF2bdks) are classic fluorescent molecules that have been explored as photochemical reagents, two-photon dyes, and oxygen sensors. A series of BF2bdks with naphthyl and phenyl groups was synthesized, and photophysical properties were investigated in both methylene chloride and poly(lactic acid) (PLA). Polymer molecular weight and dye attachment site along with bromide heavy atom placement were varied to tune optical properties of dye-PLA materials. Systems without heavy atoms have long phosphorescence lifetimes, which is useful for lifetime-based oxygen sensing. Bromine substitution on the naphthyl ring resulted in intense, clearly distinguishable fluorescence and phosphorescence peaks important for ratiometric oxygen sensing and imaging.

Original languageEnglish (US)
Pages (from-to)3736-3746
Number of pages11
JournalMacromolecules
Volume47
Issue number11
DOIs
StatePublished - Jun 10 2014

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