Novel 3D Alkali–Lanthanide Heterometal–Organic Frameworks with Pyrazine-2,3,5,6-tetracarboxylic Acid: Synthesis, Structure, and Magnetism

Three novel alkali–lanthanide heterometal–organic frameworks, namely, [K₅Ln₅­(pztc)₅­(H₂O)₁₉]·​7H₂O [Ln = Dy (<b>1</b>), Ho (<b>2</b>), and Yb (<b>3</b>); H₄pztc = pyrazine-2,3,5,6-tetracarboxylic acid], have been facilely synthesized. X-ray crystallographic analysis reveals that complexes <b>1</b>–<b>3</b> are isostructural, featuring unique 3D open frameworks, which possess a rare (4,8)-connected net with the Schläfli symbol of (4¹⁵·6¹²·8)­(4⁵·6)₂. The 3D coordination framework involves a ladder-like square column structure by pztc^4– ligands bridging metal ions, exhibiting 1D channels along the <i>b</i> axis. The magnetic analysis suggests that complexes <b>1</b> and <b>3</b> exhibit frequency-dependent out-of-phase signals in alternating current magnetic susceptibility measurements, indicating their slow magnetic relaxation characteristics. It is the first report of slow magnetic relaxation behavior existing in Yb³⁺-based HMOFs

Pyrazine-2,3-Carboxylate Based Ag⁺ Homometallic and Ln³⁺–Ag⁺ Heterometallic Coordination Frameworks: Synthesis, Structures, and Magnetic Properties

One Ag⁺ homometallic complex [Ag₄(pzdc)₂]·H₂O (<b>1</b>), and five Ln–Ag heterometallic complexes, namely, [Gd₂Ag₆(pzdc)₆(H₂O)₉]·8H₂O (<b>2</b>) and [LnAg­(pzdc)₂(H₂O)₂]·2H₂O [Ln = Tb (<b>3</b>), Dy (<b>4</b>), Ho (<b>5</b>), Er (<b>6</b>)] based on pyrazine-2,3-dicarboxylate (pzdc^2–) have been synthesized under room temperature. Complex <b>1</b> exhibits 3D metal–organic framework by Ag2 ions connecting 1D square columns consisting of Ag1 ions and pzdc^2– ligands, possessing a unique trinodal net with {4²·6}­{4³}­{4⁵·6⁴·8³·10³} topology. Complex <b>2</b> displays a 3D heterometal–organic framework with a novel 12-nodal topological net constructed by Gd1 ions linking the adjacent Ag-pzdc^2– anion layers. Complexes <b>3</b>–<b>6</b> are isostructural 2D Ln–Ag heterometallic coordination frameworks featuring uninodal 4-connected net with {4⁴·6²} topology. Magnetic analyses suggest that complexes <b>4</b> and <b>6</b> exhibit field-dependent slow magnetic relaxation, and complex <b>6</b> represents the first slow magnetic relaxation behavior existing in Er³⁺-based 2D heterometallic coordination framework

The primers used for detection the polymorphisms in SCM2 and Hd17.

<p>The primers used for detection the polymorphisms in SCM2 and Hd17.</p

The re-sequencing state information of Longdao24 and its parent.

<p>The re-sequencing state information of Longdao24 and its parent.</p

Development DNA markers for providing evidence of polymorphisms.

<p>Development DNA markers for providing evidence of polymorphisms.</p

The heading related genes (<i>Hd3a</i>, <i>Hd1</i>, <i>Hd2</i> and <i>DTH2</i>) having genetic variations in Longdao24.

<p>The heading related genes (<i>Hd3a</i>, <i>Hd1</i>, <i>Hd2</i> and <i>DTH2</i>) having genetic variations in Longdao24.</p

Variations of 22 high yield related genes in Longdao 24.

<p>Variations of 22 high yield related genes in Longdao 24.</p

GO classify for differential UniGenes in Longdao24.

<p>GO classify for differential UniGenes in Longdao24.</p

The frequencies of SNPs for Longdao24 at a 100 kb sliding window along each chromosome.

<p>The frequencies of SNPs for Longdao24 at a 100 kb sliding window along each chromosome.</p

The frequencies of Indels for Longdao24 at a 100 kb sliding window along each chromosome.

<p>The frequencies of Indels for Longdao24 at a 100 kb sliding window along each chromosome.</p