Wydział Chemii

Michał J. Białek

Jan K. Zaręba

Jan Janczak

Jerzy Zoń

2013

Crystal Growth and Design

13

4039-4050

10.1021/cg400859e

Naukowa

Angielski

Artykuł

Naphthalene-1,5-diphosphonic acid [C₁₀H₆(PO₃H₂)₂, H₄NDP(1,5), 1] and its more flexible counterpart, naphthalene-1,5-bis(methylphosphonic) acid [C₁₀H₆(CH₂PO₃H₂)₂, H₄NDP(1C,5C), 2], have been synthesized, characterized, and used as building blocks in supramolecular assemblies with 4-(N,N-dimethylamino)pyridine (DMAP) and morpholine. The two acids generate two distinct solvatomorphs each, with and without dimethyl sulfoxide (DMSO) molecules. The two adducts of H₄NDP(1,5) with DMAP (3A and 3B) reveal conformational polymorphism caused by the rotation of phosphonic groups. The two adducts of H₄NDP(1C,5C) show unexpected structural diversity, generating a symmetric hydrogen bond and creating a layered structure, 4A, or a channel structure, 4B. The adducts of both acids with morpholine (5A and 5B) allow for observing the influence of the conformational flexibility of the acids on the dimensionality of a final hydrogen bond network, which is in general higher for H₄NDP(1C,5C). The structural motifs and trends are analyzed in terms of the geometric criteria of these interactions. For the first time, Hirshfeld surface analysis has also been applied for the investigation of supramolecular interactions of phosphonic acids in different protonation states.

http://dx.doi.org/10.1021/cg400859e

https://www.acs.org/content/acs/en.html