Abstract
The self-assembly between hexakis(4-carboxyphenoxy)cyclotriphosphazene ( 1) and hexakis(4-pyridylcarbinoxy)cyclotriphosphazene ( 2) was investigated. FT-IR spectra and elemental analysis of crystals ( 3) obtained from a solution containing 1 and 2 in equimolar ratio in DMF suggested that all the carboxyl groups in 1 interact with pyridyl groups in 2 to form a 1:1 complex. The X-ray analysis of 3 showed that the crystals, defined by R=0.054 based on 4212 data, I>3.0 σ(I) , are monoclinic, space group P2 1/ n with a=13.636(6), b=24.71(1), c=23.56(1) Å, β=102.36(3)°, V=7754(6) Å 3, and Z=4. The hydrogen bonded NHO distance ranges from 2.61 to 2.82 Å with an average distance 2.69 Å and the phenoxy group in the crystals stacked with pyridyl group in the neighboring molecules, leading to the construction of 1:1 1–2 cylindrical structure 3. The characterizations of self-assembly 3 based on cyclophosphazene derivatives are described.
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