Department of Chemistry and Biochemistry, University of Berne Freiestrasse 3, 3000 Bern 9, Switzerland.
Chemphyschem. 2000 Dec 15;1(4):211-7. doi: 10.1002/1439-7641(20001215)1:4<211::AID-CPHC211>3.0.CO;2-I.
Intracrystalline diffusion kinetics of two cationic dyes in an aqueous medium were studied by means of energy transfer from an electronically excited donor to an acceptor located in one-dimensional crystalline channels. Different stages of the diffusion processes were visualized by using fluorescence microscopy. The picture illustrates the counter diffusion of the dye (hatched block) and water molecules (circles) in such a one-dimensional channel; the diffusion of the water molecules past the dye (1 → 2) is the rate-determining step rather than the period between encountering different dyes (2 → 3).
通过电子激发供体向一维晶状通道中受体的能量转移，研究了两种阳离子染料在水溶液中的晶内扩散动力学。利用荧光显微镜观察到扩散过程的不同阶段。该图说明了染料（阴影块）和水分子（圆圈）在这种一维通道中的反向扩散；水分子通过染料（1 → 2）的扩散是速率决定步骤，而不是遇到不同染料（2 → 3）之间的间隔。
