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Temperature Dependence of Triplet–Triplet Annihilation Upconversion in Phospholipid Membranes
- Askes, Sven H.
C., Brodie, Philip, Bruylants, Gilles, Bonnet, Sylvestre
- The Journal of physical chemistry 2017 v.121 no.4 pp. 780-786
- dyes, phospholipids, physical chemistry, temperature
- Understanding the temperature dependency of triplet–triplet annihilation upconversion (TTA-UC) is important for optimizing biological applications of upconversion. Here the temperature dependency of red-to-blue TTA-UC is reported in a variety of neutral PEGylated phospholipid liposomes. In these systems a delicate balance between lateral diffusion rate of the dyes, annihilator aggregation, and sensitizer self-quenching leads to a volcano plot, with the maximum upconversion intensity occurring near the main order–disorder transition temperature of the lipid membrane.