A novel 2-D coordination polymer with mixed azido and alkoxido bridges: Synthesis, structure and magnetic properties

• Published in: Polyhedron 2015-05, Vol.92, p.111-116
• Main Authors: Stoicescu, Liliana, Maxim, Cătălin, Rouzières, Mathieu, Hillebrand, Mihaela, Clérac, Rodolphe, Andruh, Marius
• Format: Article
• Language: English
• Subjects: 2-D coordination polymer; Alkoxido bridges; Azide; Chemical Sciences; Coordination chemistry; Copper complexes; Magnetic properties; Material chemistry
• ISSN: 0277-5387; 0277-5387
• DOI: 10.1016/j.poly.2015.03.019

A 2-D coordination polymer with a novel topology was synthesized: [Cu2(L)(N3)3]n (HL: 1,5-diaminopentan-3-ol). The copper ions are connected by alkoxido and three types of azido bridges: single end-on (associated with the alkoxido bridge), double asymmetric end-on, and single asymmetric end-to-end. The magnetic investigation reveals a strong antiferromagnetic interaction between the copper ions. [Display omitted] A novel 2-D coordination polymer [Cu2(L)(N3)3]n 1 (HL: 1,5-diaminopentan-3-ol) has been synthesized and its crystal structure and magnetic properties have been studied. The crystal structure of the compound 1 consists of binuclear moieties [Cu2(L)(N3)3] with mixed alkoxido/end-on azido bridges, which are linked by double asymmetric end-on and single asymmetric end-to-end azido bridges, resulting in a 2-D layer extended within the ab crystallographic plane. Variable-temperature magnetic susceptibility data evidence strong antiferromagnetic interaction between the CuII ions within the binuclear units, which are mediated by the two types of bridges (J=−123(2)cm−1, H=−2JS1S2). The experimental value of the exchange coupling constant is confirmed by DFT calculations.