Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439.
Proc Natl Acad Sci U S A. 1980 Oct;77(10):5598-601. doi: 10.1073/pnas.77.10.5598.
The zinc and magnesium tris(pyrochlorophyllide a) 1,1,1-tris(hydroxymethyl)ethane triesters have properties that are very similar to those exhibited by pairs of pyrochlorophyll a or chlorophyll a linked by ethylene glycol through their propionic acid side chains. In the open configuration, the fluorescence lifetimes and emission spectra of the triesters resemble those of chlorophyll a monomers. However, the triesters have a mechanism for energy dissipation not present in monomeric chlorophyll a, which prevents the build-up of significant concentrations of molecules in S(1) states. Optical pumping of these compounds in their folded configuration results in the formation of high concentrations of molecules in S(1) states and in laser light emission, which originates from the two folded macrocycles. The optical data indicate that efficient energy transfer occurs from the open to the folded configurations.
锌和镁三（焦脱镁叶绿酸 a）1,1,1-三（羟甲基）乙烷三酯具有与焦脱镁叶绿酸 a 对或通过其丙酸侧链与乙二醇相连的叶绿素 a 对表现出的性质非常相似。在开放构型中，三酯的荧光寿命和发射光谱类似于叶绿素 a 单体。然而，三酯具有一种在单体叶绿素 a 中不存在的能量耗散机制，这可以防止 S(1)态分子浓度的显著积累。这些化合物在折叠构型下的光泵浦导致 S(1)态分子的高浓度形成和激光发射，这源于两个折叠的大环。光学数据表明，有效的能量转移从开放构型到折叠构型发生。
