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Single crystal to single crystal polymorphic phase transition of a silver nitrate 24-crown-8 complex and its pseudo-polymorphism

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2012
Author Girard Jerome, Fromm Katharina M.,
Project New anti-bacterial coatings for implant materials
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Original article (peer-reviewed)

Journal CrystEngComm
Volume (Issue) 14
Page(s) 6487 - 6491
Title of proceedings CrystEngComm
DOI 10.1039/C2CE25875G


A silver nitrate 24-crown-8 complex [Ag4(24-crown-8)(NO3)4] (1) was synthesized, showing a single crystal to single crystal polymorphic phase transition induced by temperature and leading to polymorph [Ag4(24-crown-8)(NO3)4] 1′. When this complex (1) is exposed to humidity or directly crystallized from a water containing solvent, a pseudo polymorph [Ag4(24-crown-8)(NO3)4(H2O)2] (2) with two additional water molecules is obtained. When this pseudo polymorph is heated above 100° C, it may be transformed back into the first structure (1).