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Novel Alkali Triazine Tricarboxylates Li 3 [C 3 N 3 (CO 2 ) 3 ]·4H 2 O, Rb 3 [C 3 N 3 (CO 2 ) 3 ]·2H 2 O and Cs 3 [C 3 N 3 (CO 2 ) 3 ]·2H 2 O – Synthesis, Crystal Structure and Thermal Behavior
Author(s) -
Makowski Sophia J.,
Calta Evelyn,
Schnick Wolfgang
Publication year - 2011
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.201100311
Subject(s) - alkali metal , crystallography , aqueous solution , triazine , chemistry , alkaline earth metal , crystal structure , inorganic chemistry , stacking , infrared spectroscopy , polymer chemistry , organic chemistry
Abstract The alkali 1,3,5‐triazine‐2,4,6‐tricarboxylates Li 3 [C 3 N 3 (CO 2 ) 3 ] · 4H 2 O, Rb 3 [C 3 N 3 (CO 2 ) 3 ] · 2H 2 O and Cs 3 [C 3 N 3 (CO 2 ) 3 ] · 2H 2 O were synthesized by saponification of the respective triethyl ester in aqueous solution. In the crystal structure, the triazine tricarboxylate (TTC) units and metal ions are arranged in layers alternating with layers of crystal water molecules. Within the layers the triazine tricarboxylate entities form either strands in Li 3 [C 3 N 3 (CO 2 ) 3 ] · 4H 2 O or a hexagonal arrangement in Rb 3 [C 3 N 3 (CO 2 ) 3 ] · 2H 2 O and Cs 3 [C 3 N 3 (CO 2 ) 3 ] · 2H 2 O. Perpendicular to the layers, the triazine cores exhibit varying degrees of π–π stacking dependent on the metal ions resulting in the formation of rods in Rb 3 [C 3 N 3 (CO 2 ) 3 ] · 2H 2 O and Cs 3 [C 3 N 3 (CO 2 ) 3 ] · 2H 2 O. Additionally, the thermal behavior of the alkali triazine tricarboxylates was investigated by means of FT‐IR spectroscopy, TG and DTA measurements. Differences and similarities regarding structural features and thermal behavior are discussed for the obtained novel alkali triazine tricarboxylates and potassium triazine tricarboxylate dihydrate.