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Syntheses And Properties Of Molecular Reactors

Posted on:2008-03-29Degree:MasterType:Thesis
Country:ChinaCandidate:C L TuFull Text:PDF
GTID:2120360242476311Subject:Applied Chemistry
Abstract/Summary:PDF Full Text Request
It's a new topic for chemists to research on modeling the function of cell's environment and enzymes via synthesis artificial molecular reactors. This work introduced several new molecular reactors obtained by directional synthesis and the self-assembly method, and pilot studies of their properties. The major work was focused on three aspects as follows: (1) Two new C3v-symmetrical molecular reactors L1 and L2 based on calix[6]arene were synthesized by Calix[6]arene with the low rims modified and tripodal cavity ligand which were made from 4-tert-butylphenol and dimethyl pyridine-2,6- dicarboxylate, respectively, in [1+1] macrocyclization reaction, and characterized by ES-MS, single crystal X-ray diffraction, and nuclear magnetic resonance. Further more, some researches were carried out on the selective recognition of L1with guest molecules by 1H NMR, and the results indicated that L1 can controllably recognize small straight chain ammoniums reversibly. (2) 1,3,5-tris(pyrazol-1-yl)benzene and 1,3,5-tris [p-(pyrazol-1-yl)phenyl]benzene were synthesized, and porous polymer reactors {[Ag3L32(ClO4)2]ClO4}n and {[Ag3L32(NO3)2]NO3}n were obtained by self-assembly of L3 with silver nitrate and silver perchlorate. The structures and properties were characterized by single crystal X-ray diffraction, powder X-ray diffraction, IR, photoluminescence and atomic absorption spectra. The free anions in porous channels can be exchanged reversibly. The photoluminescent property of L4 can be influenced by formation of silver complex. (3) A novel chiral reactor based onα-cyclodextrin that was modified selectively has been prepared.
Keywords/Search Tags:calixarenes, cyclodextrins, tripodal ligands, self-assembly, molecular reactors
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