By Douglas C. Neckers
Greater than an easy survey of the present literature, Advances in Photochemistry deals serious reviews written through across the world well-known specialists. those pioneering scientists supply distinctive and sundry issues of view of the present facts. Their articles are tough in addition to provocative and are meant to stimulate dialogue, advertise extra examine, and inspire new advancements within the box.
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C. Jansen, M. Sto¨cker, H. G. Karge, and J. , Elsevier; Amsterdam, 1994, Vol. 85, p. 145. 17. M. Ehrl, F. W. Deeg, C. Bra¨uchle, O. Franke, A. Sobbi, G. Schulz-Ekloff, and D. Wo¨hrle, J. Phys. Chem. 1994, 98, 47. 18. R. Hoppe, G. Schulz-Ekloff, D. Wo¨hrle, C. Kirschhock, and H. Fuess, in Zeolites and Related Microporous Materials: State of the Art 1994. Studies in Surface Science and Catalysis, J. Weitkamp, H. G. Karge, H. Pfeifer, W. , Elsevier, Amsterdam, 1994, Vol. 84, pp. 821–827. 19. J. Caro, F.
The number of unit cells per channel is equal to its length divided by the length of the unit cell c. By using Eq. (1), we can write nuc ¼ nch 2 lZ p dZ lZ ¼ pﬃﬃﬃ jcj 2 3 jaj jcj ð17Þ 14 SUPRAMOLECULARLY ORGANIZED LUMINESCENT DYE MOLECULES OF ZEOLITE L From this follows the ratio of nuc and nD: nuc dZ l Z AD ¼ pﬃﬃﬃ 2 nD dZ þ 2lZ 3jaj jcj ð18Þ Applying the values of a and c for zeolite L leads to nuc ¼ 0:357dZ2 lZ nuc dZ lZ ¼ 0:227AD nD dZ þ 2lZ ð19Þ ð20Þ where dZ and lZ are in units of nanometers (nm).
In the ﬁrst step, we observed in this material the process of insertion of Pyþ and in a second step of Oxþ into the channels, out of an aqueous suspension of zeolite L crystals containing dissolved Pyþ and Oxþ, respectively. 13. 5 mm. (2–5) True color ﬂuorescence microscopy pictures of dye loaded zeolite L crystals. (2–4) Fluorescence after excitation of only Pyþ: (2) after 5-min exchange with Pyþ, (3) after 2 h exchange with Pyþ, (4) after additional 2 h exchange with Oxþ. (5) The same as 4 but after speciﬁc excitation of only Oxþ.