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Ein Dipyrrino‐Cryptand — Synthese, Kristallstruktur, Metallkomplexierung
Author(s) -
Seel Christian,
Vögtle Fritz,
Nieger Martin
Publication year - 1992
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19921250223
Subject(s) - cryptand , chemistry , crystallography , chromophore , crystal structure , alkali metal , ether , crown ether , ring (chemistry) , metal , stereochemistry , cyclophane , photochemistry , organic chemistry , ion
A Dipyrrino Cryptand — Synthesis, Crystal Structure, Metal Complexation The orange red cryptand 1 , containing a dipyrrin chromophore, has been synthesized in seven steps. Its C 2 ‐symmetrical X‐ray structure exhibits a planar dipyrrin unit and a twisted but not collapsed crown ring, two of the ether oxygen atoms projecting outwards. The complexation of alkali and transition metal cations by this concave dyestuff leads to changes of the color and to strong shifts in the UV/Vis spectra.