Abstract
The synthesis of new porous materials with desired properties is a challenging task. It becomes especially difficult if you need to combine several metals in one framework to obtain a heterometallic node. The use of presynthesized complexes for obtaining of new heterometallic metal-organic frameworks could be essential to solve the problem of tailored synthesis. In our study we use presynthesized heterometallic pivalate complex [Li2Zn2(piv)(6)(py)(2)] to obtain new MOFs with heterometallic core as a node of the framework. We are managed to obtain four new heterometallic MOFs: [H2N(CH3)(2)](2)[Li2Zn2(bdc)(4)]center dot CH3CN center dot DMF (1), [Li2Zn2(H2Br2-bdc)(Br-2-bdc)(3)]center dot 2DMF (2), [H2N(CH3)(2)][LiZn2(ndc)(3)]center dot CH3CN (3) and [{Li2Zn2(dmf)(py)(2)}{LiZn(dmf)(2)}(2) (NO2-bdc)(6)]center dot 5DMF (4). Moreover three of them contain starting tetranuclear core {Li2Zn2} and saves its geometry. We also demonstrate the influence of substituent in terephthalate ring on preservation of tetranuclear core. For compound 1 it was shown that luminescence of the framework could be quenched when nitrobenzene is included in the pores.