Failure‐experiment‐supported optimization of poorly reproducible synthetic conditions for novel lanthanide metal‐organic frameworks with two‐dimensional secondary building units

2021 ◽  
Author(s):  
Yu Kitamura ◽  
Emi Terado ◽  
Zechen Zhang ◽  
Hirofumi Yoshikawa ◽  
Tomoko Inose ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Two Dimensional ◽  
Secondary Building Units ◽  
Metal Organic ◽  
Lanthanide Metal

scholarly journals Two-dimensional metal-organic frameworks containing linear dicarboxylates

2006 ◽  
Vol 62 (5) ◽  
pp. 808-814 ◽  
Author(s):  
Samuel M. Hawxwell ◽  
Harry Adams ◽  
Lee Brammer
Keyword(s):  
Dicarboxylic Acid ◽  
Solvothermal Synthesis ◽  
Interplanar Spacing ◽  
Metal Organic Frameworks ◽  
Dicarboxylic Acids ◽  
Two Dimensional ◽  
Secondary Building Units ◽  
Metal Organic ◽  
Gas Molecules ◽  
Solvent Molecules

The solvothermal synthesis of four two-dimensional metal-organic frameworks containing linear dicarboxylic acids as ligands for ZnII centres is described. Zn(BDC)(DMF) [(1) where BDC = benzene-1,4-dicarboxylic acid; DMF = N,N-dimethylformamide] adopts a common paddlewheel motif leading to a 44 grid network, whereas Zn3(BDC)3(EtOH)2 (2), Zn3(BDC)3(H2O)2·4DMF (3) and Zn3(BPDC)3(DMF)2·4DMF (4) each form networks with the relatively uncommon 36 topology based upon Zn3(O2CR)6 secondary building units. All contain coordinated solvent molecules, namely DMF [(1) and (4)], ethanol (2) or H2O (3). Comparison of structures (2) and (3) illustrates a clay-like flexibility in interplanar spacing which sheds light on the ability of the Zn3(BDC)3 framework to undergo desolvation and uptake of small solvent and gas molecules.

A Series of Two-Dimensional Metal−Organic Frameworks Based on the Assembly of Rigid and Flexible Carboxylate-Containing Mixed Ligands with Lanthanide Metal Salts

2007 ◽  
Vol 7 (10) ◽  
pp. 2041-2046 ◽  
Author(s):  
Xing-Jing Zhang ◽  
Yong-Heng Xing ◽  
Zheng Sun ◽  
Jing Han ◽  
Yuan-Hong Zhang ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Metal Salts ◽  
Two Dimensional ◽  
Mixed Ligands ◽  
Metal Organic ◽  
Lanthanide Metal

Lanthanide Metal−Organic Frameworks Based on Octahedral Secondary Building Units: Rare Net Topology and Luminescence

2009 ◽  
Vol 9 (7) ◽  
pp. 2984-2987 ◽  
Author(s):  
Li Yan ◽  
Qi Yue ◽  
Qin-Xiang Jia ◽  
Gilles Lemercier ◽  
En-Qing Gao
Keyword(s):  
Metal Organic Frameworks ◽  
Secondary Building Units ◽  
Metal Organic ◽  
Lanthanide Metal

scholarly journals Failure-experiment-supported optimization of poorly reproducible synthetic conditions for novel lanthanide metal-organic frameworks with two-dimensional secondary building units

2021 ◽  
Author(s):  
Yu Kitamura ◽  
Emi Terado ◽  
Zechen Zhang ◽  
Hirofumi Yoshikawa ◽  
Tomoko Inose ◽  
...  
Keyword(s):  
Machine Learning ◽  
Water Adsorption ◽  
Metal Organic Frameworks ◽  
Machine Learning Techniques ◽  
Initial Screening ◽  
Screening Experiments ◽  
Learning Techniques ◽  
Secondary Building Units ◽  
Metal Organic ◽  
Lanthanide Metal

A series of novel metal organic frameworks with lanthanide double-layer-based inorganic subnetworks (KGF-3) was synthesized assisted by machine learning. Pure KGF-3 was difficult to isolate in the initial screening experiments. The synthetic conditions were successfully optimized by extracting the dominant factors for KGF-3 synthesis using two machine-learning techniques. Cluster analysis was used to classify the obtained PXRD patterns of the products and to decide automatically whether the experiments were successful or had failed. Decision tree analysis was used to visualize the experimental results, with the factors that mainly affected the synthetic reproducibility being extracted. The water adsorption isotherm revealed that KGF-3 possesses unique hydrophilic pores, and impedance measurements demonstrated good proton conductivities (σ = 5.2 × 10<sup>−4</sup> S cm<sup>−1</sup> for KGF-3(Y)) at a high temperature (363 K) and high relative humidity (95%).<br>

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