Quenchable Porous High-Temperature Polymorph of Sodium Imidazolate, NaIm

Sanja  Burazer; Koen  Robeyns; Laure  Guénée; Gregor  Mali; Fabrice  Morelle; Voraksmy  Ban; Teodoro  Klaser; Yaroslav  Filinchuk; Radovan  ?erny; Jasminka  Popovi?

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Quenchable Porous High-Temperature Polymorph of Sodium Imidazolate, NaIm

机译：iniidazolate钠淬火多孔高温多晶型物，Naim

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The novel high-temperature polymorph of sodium imidazolate reported in this paper was discovered in the mechanochemical reaction of NaIm with NaBH_(4) and later prepared directly by thermal treatment of the room-temperature polymorph of NaIm. Solid-state NMR was used for initial elucidation of structural features; the crystal structure was determined by single-crystal X-ray diffraction, while the in situ HT-XRPD experiments utilizing synchrotron radiation have been performed in order to gain the insight into the structural evolution and thermal stability, in addition to differential thermal analysis and hot-stage microscopy measurements. Contrary to the RT polymorph that forms a dense and hypercoordinated structure without pores, the high-temperature polymorph of NaIm exhibits pores of 50 ?~(3) that suggest possible application for gas sorption/separation. It is important to highlight that, once formed, the high-temperature polymorph of NaIm retains its structure and remains stable at room temperature.

机译：本文报道的咪唑啉钠的新型高温多晶型物是在NaIm与NaBH_4的机械力化学反应中发现的，随后直接通过热处理NaIm的室温多晶型物制备的。固体核磁共振用于初步阐明结构特征；晶体结构由单晶X射线衍射确定，同时利用同步辐射进行了原位HT-XRPD实验，以了解结构演变和热稳定性，此外还进行了差热分析和热台显微镜测量。与RT多晶型形成致密且超协调的无孔结构相反，NaIm的高温多晶型显示出50~（3）这表明可能应用于气体吸附/分离。重要的是要强调，一旦形成，NaIm的高温多晶型物将保留其结构，并在室温下保持稳定。

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《Crystal growth & design》 |2021年第2期|共9页
作者
Sanja Burazer; Koen Robeyns; Laure Guénée; Gregor Mali; Fabrice Morelle; Voraksmy Ban; Teodoro Klaser; Yaroslav Filinchuk; Radovan ?erny; Jasminka Popovi?;
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Laboratory for Synthesis and Crystallography of Functional Materials Division for Materials Physics Ru?er Bo?kovi? Institute;

Institute of Condensed Matter and Nanosciences Université catholique de Louvain Place L. Pasteur;

Laboratory of Crystallography DQMP University of Geneva;

Department of Inorganic Chemistry and Technology National Institute of Chemistry;

Institute of Condensed Matter and Nanosciences Université catholique de Louvain Place L. Pasteur;

Institute of Condensed Matter and Nanosciences Université catholique de Louvain Place L. Pasteur;

Department of Physics Faculty of Science University of Zagreb;

Institute of Condensed Matter and Nanosciences Université catholique de Louvain Place L. Pasteur;

Laboratory of Crystallography DQMP University of Geneva;

Laboratory for Synthesis and Crystallography of Functional Materials Division for Materials Physics Ru?er Bo?kovi? Institute;

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中图分类晶体学;
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Quenchable Porous High-Temperature Polymorph of Sodium Imidazolate, NaIm

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