Repozytorium publikacji - Politechnika Gdańska

To evaluate the impact of the flexible positional isomeric ligands thiophene-2-acetate (2tpacCOO) andthiophene-3-acetate (3tpacCOO) on the construction and self-assembly process of Pb(II) polymers, twonovel compounds, [Pb(2tpacCOO)2(H2O)]n(1) and [Pb(3tpacCOO)2]n(2), were preparedviaanonhydro-thermal method with respect to green chemistry rules. The obtained polymers were fully characterized byelemental analysis, TG/DTG and PXRD, FT-IR, solid-state photoluminescence, DFT calculations and single-crystal X-ray diffraction. Each Pb(II)centreof1is 7-coordinated as a {PbO7} chromophore while the Pb(II)centre of2is 6-coordinated as a {PbO6} structure. The coordination polyhedron of1is best described as adistorted monocapped pentagonal pyramid, and2has a distorted trigonal prismatic shape. The crystallo-graphic analysis and DFT calculations indicated the stereoactivity of the lone electron pair, which contrib-uted to the hemidirected geometry of the Pb(II) environment. Due to the versatile binding modes of the li-gands, complex1forms 1D stair-like chains with an SP 1-periodic net (4,4)(2,0) topology, and theunderlying net of2is determined to have a 1D 2,4C4 topology. It is worth noting that the crystal structuresof the obtained polymers are stabilized mainly by many hydrogen bonds as well as Pb⋯SandPb⋯πtetrelinteractions. Moreover, the PL data demonstrate the different influences of the isomers of linkers onphotoluminescence properties. Polymer1might be a good candidate for obtaining solid-state photo-luminescent materials.

Autorzy

• Mateusz Kowalik,
• dr hab. Joanna Masternak,
• dr hab. Katarzyna Kazimierczuk link otwiera się w nowej karcie ,
• Bogumiła Kupcewicz,
• Oleksiy Khavryuchenko,
• dr hab. Barbara Barszcz