Direct Excitation Energy Transfer as a Technique for in Situ Measurements of Ion-Exchange Processes in Single Polymer Particles

Analytical Chemistry

Volumn 70, Issue 1, 1998, Pages 105-110

  Kim, Haeng Boo ^a   Habuchi, Satoshi ^a   Hayashi, Masahiko ^a   Kitamura, Noboru ^a  

^a HOKKAIDO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

DIFFUSION; DYES; ELECTRON TRANSPORT PROPERTIES; ELECTRONIC DENSITY OF STATES; ENERGY TRANSFER; FLUORESCENCE; ION EXCHANGE RESINS; ORGANIC POLYMERS; PARTICLES (PARTICULATE MATTER);

DIRECT EXCITATION ENERGY TRANSFER; FLUORESCENCE MICROSPECTROSCOPY; LASER TRAPPING MICROSPECTROSCOPY; RHODAMINE;

ION EXCHANGE;

EID: 0031672578     PISSN: 00032700     EISSN: None     Source Type: Journal    
DOI: 10.1021/ac970808a     Document Type: Article

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29. For quantitative and reproducible measurements of the ion-exchange processes, we used the air-dried resins, since the dye concentration might vary if a wet resin were added to the dye solution for soaking. When the air-dried resin was soaked in an aqueous dye solution, the resin particles sank immediately. The results indicate that diffusion of water molecules into the particle is very fast and the interior of the resin is hydrated. On the other hand, the dye molecules are adsorbed only in the surface layer of the resin in the initial stage of soaking, and diffusion of the dye into the interior is very slow compared to that of water: RhB, day to week; MG, ∼hour. In the present experiments, therefore, D determined represents that in a wet or hydrated resin particle.
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