NEW METAL-ORGANIC COORDINATION POLYMERS FROM PRE-SYNTHESIZED HETEROMETALLIC PIVALATE COMPLEXES: SYNTHESIS AND CRYSTAL STRUCTURE

As a result of the interaction of a heterometallic pivalate complex [Li 2 Zn 2 (py) 2 (piv) 6 ] (piv – is the pivalate anion, py is pyridine) with a naphthalene-1,4-dicarboxylic acid (H 2 ndc) solution in DMF, heterometallic metal-organic framework (MOF) (H 2 NMe 2 )[Li 5 Zn 4 (DMF) 2 (Hndc) 2 (ndc) 6 ]·11DMF·2H 2 O ( 1 ) is obtained. Dimethylammonium is formed due to the hydrolysis of DMF. During the synthesis, both complex fragmentation and complete maintenance of the initial tetranuclear heterometallic moiety {Li 2 Zn 2 } are observed. In the interaction of the same molecular complex with a nitroterephthalic acid solution (H 2 NO 2 -bdc), (H 2 NMe 2 )[LiZn(NO 2 -bdc) 2 ]·0.5DMF·0.5H 2 O MOF ( 2 ) is formed in which there is a partial destruction of the initial framework with the formation of a binuclear unit {LiZn}. By the interaction of the heterometallic [Zn 2 Eu(phen) 2 (OH)(piv) 4 (NO 3 ) 2 ] (phen is phenanthroline) complex with the solution of 1,3,5-benzenetricarboxylic acid (H 3 btc) in DMF, homometallic framework polymer [Zn 3 (phen) 3 (btc) 2 ]·DMF·3H 2 O ( 3 ) is obtained. Complete decomposition of the trinuclear heterometallic moiety is observed here.