Syntheses, crystal structures, and water adsorption behaviors of jungle-gym-type porous coordination polymers containing nitro moieties
✍ Scribed by Kazuhiro Uemura; Fumiaki Onishi; Yukari Yamasaki; Hidetoshi Kita
- Book ID
- 104030470
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 447 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
NO 2 containing dicarboxylate bridging ligands, nitroterephthalate (bdc-NO 2 ) and 2,5-dinitroterephthalate (bdc-(NO 2 ) 2 ), afford porous coordination polymers, {[Zn 2 (bdc-NO 2 ) 2 (dabco)] Á solvents} n (2*solvents) and {[Zn 2 (bdc-(NO 2 ) 2 ) 2 (dabco)] Á solvents} n (3*solvents). Both compounds form jungle-gym-type regularities, where a 2D square grid composed of dinuclear Zn 2 units and dicarboxylate ligands is bridged by dabco molecules to extend the 2D layers into a 3D structure. In 2*solvents and 3*solvents, a rectangle pore surrounded by eight Zn 2 corners contains two and four NO 2 moieties, respectively. Thermal gravimetry (TG) and X-ray powder diffraction (XRPD) measurements reveal that both compounds maintain the frameworks regularities without guest molecules and with solvents such as MeOH, EtOH, i-PrOH, and Me 2 CO. Adsorption measurements reveal that dried 2 and 3 adsorb H 2 O molecules to be {
showing the pore hydrophilicity enhancement caused by NO 2 group introduction.