TY - JOUR
T1 - Tailoring Oxygen Sensitivity with Halide Substitution in Difluoroboron Dibenzoylmethane Polylactide Materials
AU - DeRosa, Christopher A.
AU - Kerr, Caroline
AU - Fan, Ziyi
AU - Kolpaczynska, Milena
AU - Mathew, Alexander S.
AU - Evans, Ruffin E.
AU - Zhang, Guoqing
AU - Fraser, Cassandra L.
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/10/28
Y1 - 2015/10/28
N2 - The dual-emissive properties of solid-state difluoroboron β-diketonate-poly(lactic acid) (BF2bdkPLA) materials have been utilized for biological oxygen sensing. In this work, BF2dbm(X)PLA materials were synthesized, where X = H, F, Cl, Br, and I. The effects of changing the halide substituent and PLA polymer chain length on the optical properties in dilute CH2Cl2 solutions and solid-state polymer films were studied. These luminescent materials show fluorescence, phosphorescence, and lifetime tunability on the basis of molecular weight, as well as lifetime modulation via the halide substituent. Short BF2dbm(Br)PLA (6.0 kDa) and both short and long BF2dbm(I)PLA polymers (6.0 or 20.3 kDa) have fluorescence and intense phosphorescence ideal for ratiometric oxygen sensing. The lighter halide-dye polymers with hydrogen, fluorine, and chlorine substitution have longer phosphorescence lifetimes and can be utilized as ultrasensitive oxygen sensors. Photostability was also analyzed for the polymer films.
AB - The dual-emissive properties of solid-state difluoroboron β-diketonate-poly(lactic acid) (BF2bdkPLA) materials have been utilized for biological oxygen sensing. In this work, BF2dbm(X)PLA materials were synthesized, where X = H, F, Cl, Br, and I. The effects of changing the halide substituent and PLA polymer chain length on the optical properties in dilute CH2Cl2 solutions and solid-state polymer films were studied. These luminescent materials show fluorescence, phosphorescence, and lifetime tunability on the basis of molecular weight, as well as lifetime modulation via the halide substituent. Short BF2dbm(Br)PLA (6.0 kDa) and both short and long BF2dbm(I)PLA polymers (6.0 or 20.3 kDa) have fluorescence and intense phosphorescence ideal for ratiometric oxygen sensing. The lighter halide-dye polymers with hydrogen, fluorine, and chlorine substitution have longer phosphorescence lifetimes and can be utilized as ultrasensitive oxygen sensors. Photostability was also analyzed for the polymer films.
KW - difluoroboron β-diketonate complexes
KW - heavy atom effect
KW - photostability
KW - poly(lactic acid)
KW - roomerature phosphorescence
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U2 - 10.1021/acsami.5b07126
DO - 10.1021/acsami.5b07126
M3 - Article
C2 - 26480236
AN - SCOPUS:84946048249
SN - 1944-8244
VL - 7
SP - 23633
EP - 23643
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 42
ER -