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Growth of Calcite Single Crystals Underneath Monolayers of 5, 11, 17, 23‐Tetra‐ t ‐butyl‐25, 26, 27, 28‐tetrakis(carboxymethoxy)calix[4]arene
Author(s) -
Volkmer Dirk,
Fricke Marc
Publication year - 2003
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200300254
Subject(s) - monolayer , calcite , tetra , supramolecular chemistry , chemistry , amphiphile , crystallography , nucleation , surface pressure , single crystal , stereochemistry , crystal structure , medicinal chemistry , organic chemistry , mineralogy , biochemistry , copolymer , polymer , physics , mechanics
The amphiphilic 5, 11, 17, 23‐tetra‐ t ‐butyl‐25, 26, 27, 28‐tetrakis(carboxymethoxy)calix[4]arene ( 1 ) forms stable monolayers at the air‐water interface which serve as template to induce growth of CaCO 3 (calcite) single crystals. The nucleation density and the preferred orientation(s) of calcite single crystals depend on the surface pressure applied to the monolayer. Models of the pressure‐dependant aggregation of amphiphiles at the air‐water interface are derived from the crystal structures of the novel Ca coordination compounds [(Ca(C 52 H 60 O 12 )) 2 Ca(H 2 O) 2 (CH 3 OH) 3 Ca(H 2 O) 2 (CH 3 OH) 2 ]·12CH 3 OH·4H 2 O ( 2 ) and [Ca(C 52 H 60 O 12 )Ca(H 2 O) 2.5 (MeOH) 0.5 ]·7H 2 O·CH 3 OH ( 3 ). Structural data are analyzed in terms of supramolecular packing arrangements and Ca coordination motifs of the constituting amphiphilic macrocycles.