Published January 1, 2015
| Version v1
Journal article
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Tetrahedral Tetraphosphonic Acids. New Building Blocks in Supramolecular Chemistry
Creators
- 1. Univ Bremen, Inst Anorgan Chem & Kristallog, D-28359 Bremen, Germany
- 2. Yildiz Tech Univ, Dept Chem, TR-34010 Istanbul, Turkey
- 3. ETH, Dept Chem & Appl Biosci, CH-8093 Zurich, Switzerland
- 4. Paul Scherrer Inst, Lab Catalysis & Sustainable Chem, CH-5232 Villigen, Switzerland
- 5. Gebze Tech Univ, Dept Chem, TR-41400 Gebze, Kocaeli, Turkey
- 6. Yildiz Tech Univ, Fac Chem & Met Engn, Dept Bioengn, TR-34210 Istanbul, Turkey
Description
The structural characterization of tetraphenylmethane tetrakis-4-phosphonic acid (4a) and its closely related Si-analogue tetraphenylsilane tetrakis-4-phosphonic acid (4b) is reported. Crystals of 4a, obtained by crystallization at 165 degrees C from water under hydrothermal conditions, comprise a dense threefold interpenetrated hydrogen-bonded network. Lower calculated density cocrystals 4b.4 EtOH, attained by recrystallization from ethanol, give rise to a porous honeycomb network that shows no interpenetration. Isolated from the mother liquor, the encapsulated ethanol is rapidly lost under ambient conditions leaving amorphous 4h. While the amorphous 4b is reasonably soluble in methanol, crystalline 4a is virtually insoluble in common organic solvents.
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