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Synthesis, Structure, and Properties of a New Calcium(II) Complex of 1,10‐Phenanthroline, 1,2,4,5‐Benzenetetracarboxylic Acid, and a New Precursor to Produce Pure Phase Micro‐crystalline Calcite Particles
Author(s) -
Wu Gang,
Zhang ShouQuan,
Guo Li
Publication year - 2013
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.201200502
Subject(s) - crystallography , monoclinic crystal system , chemistry , molecule , calcite , hydrogen bond , crystal structure , stacking , phenanthroline , infrared spectroscopy , mineralogy , organic chemistry
The self‐assembly of 1, 0‐phenanthroline (phen) and 1,2,4,5‐benzenetetracarboxylic acid(H 4 btc) with Ca(NO 3 ) 2 gives rise to a two‐dimensional network structure coordination polymer, [Ca(phen)(btc) 0.5 (H 2 O)] ( 1 ), which was characterized by elemental analysis, IR spectroscopy, and single‐crystal X‐ray diffraction. This compound is monoclinic, space group C 2/ c , with Z = 8 in a unit cell with dimensions a = 21.744(3) Å, b = 10.0151(12) Å, c = 14.7122(17) Å, β = 110.2850(10)°. The structure contains one crystallographic unique Ca II atom, one phen coordinated molecule and a half of btc 4– anion. The phen molecule acts as a didentate ligand chelating with a Ca II atom, whereas the btc 4– anion acts as a μ 6 ‐bridge linking six different Ca II atoms to form a two‐dimensional network with (4, 4) topological structure. The three dimensional stacking structures are formed by C–H ··· O hydrogen bonding and π–π interaction. The thermal stability and fluorescent properties of 1 were investigated. Calcite particles are produced by calcination of compound 1 at 580 °C. The obtained calcite was characterized by XRD and SEM analyses.