Askes Sven H C, Brodie Philip, Bruylants Gilles, Bonnet Sylvestre
Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University , P.O. Box 9502, 2300 RA Leiden, The Netherlands.
Engineering of Molecular NanoSystems, Université Libre de Bruxelles , 50 av. F.D. Roosevelt, 1050 Brussels, Belgium.
J Phys Chem B. 2017 Feb 2;121(4):780-786. doi: 10.1021/acs.jpcb.6b10039. Epub 2017 Jan 24.
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.
了解三重态-三重态湮灭上转换（TTA-UC）的温度依赖性对于优化上转换的生物应用至关重要。本文报道了多种中性聚乙二醇化磷脂脂质体中红到蓝TTA-UC的温度依赖性。在这些系统中，染料的横向扩散速率、湮灭剂聚集和敏化剂自猝灭之间的微妙平衡导致了一个火山图，最大上转换强度出现在脂质膜的主要有序-无序转变温度附近。
