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Controllable Growth of Well-Defined Regular Multiporphyrin Array Nanocrystals at the Water−Chloroform Interface
journal contribution
posted on 2005-05-24, 00:00 authored by Bing Liu, Dong-Jin Qian, Hong-Xiang Huang, Tatsuki Wakayama, Shigeki Hara, Wei Huang, Chikashi Nakamura, Jun MiyakeOn the basis of the coordination geometry of metal ions, regular cubic, clubbed, and wirelike nanocrystals
of Cd2+-/PtCl62--mediated, and Hg2+-/Ag+-/PtCl42--mediated multiporphyrin arrays have been grown at
the water−chloroform interface. The nanocrystal growth process was monitored by the transmission electron
microscopy (TEM), which revealed (1) an intrinsic rule for coordination polymers, that is, the geometries
of metal ions (as connects for the coordination polymers) dominate the frameworks of the related polymeric
nanocrystals, and (2) one kind of intuitive nanocrystal growth processes at the interfaces. Both electron
diffraction and X-ray diffraction patterns indicated the formation of well-defined nanocrystals. It was
found that single-/microcrystals were formed at first, and then they grew into polycrystals. The nanocrystal
layer was transferred onto Si and quartz substrate surfaces by the Langmuir−Blodgett method, with its
composition analyzed by X-ray photoelectron spectroscopy as well as the arrangement of porphyrin
macrocycles in the nanocrystals by UV−vis absorption spectroscopy.