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Cover Picture: Angew. Chem. Int. Ed. 19/2002
Author(s) -
Müller Achim,
Krickemeyer Erich,
Bögge Hartmut,
Schmidtmann Marc,
Roy Soumyajit,
Berkle Alois
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20021004)41:19<3509::aid-anie3509>3.0.co;2-5
Subject(s) - dodecahedron , ring (chemistry) , crystallography , cover (algebra) , chemistry , molecule , ether , cluster (spacecraft) , crown ether , shell (structure) , stereochemistry , materials science , ion , mechanical engineering , programming language , organic chemistry , computer science , engineering , composite material
The cover picture shows a novel hierarchic endohedral clusterization of H 2 O molecules in the form of a dodecahedron ((H 2 O) 20 , red), a further “mounted” dodecahedron (green), and a rhombicosidodecahedron ((H 2 O) 60 , yellow). The shell/host (Mo atoms blue, O red) is built up by 12 pentagonal {(Mo)Mo 5 } type building blocks (one is highlighted as a blue ring),which are connected by 30 Mo V 2 linkers with the consequence that 20 nanosized Mo 9 O 9 pores/rings of classical crown ether quality are formed in which 20 guanidinium cations are encapsulated (C black, N green). The Mo V 2 type linkers are stabilized by PO 2 H 2 − /SO 4 2− ligands (P/S purple). As the clusterization in the cavity takes place after filling the receptors/pores at the cluster surface with guests, a process is modeled by which a cell converts an extracellular molecular signal into a response. The representative red ring below the blue ring is marked out by the 60 H 2 O ligands coordinated to the pentagonal Mo units, which altogether form a rhombicosidodecahedron (not shown completely). As the geometric forms described are those of Platonic and Archimedean solids Plato and Archimedes feel involved. Further details are reported by A. Müller et al. on p. 3604 ff.