کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613107 | 1516311 | 2014 | 6 صفحه PDF | دانلود رایگان |

• New borate–malate crystals NaB(DL-C4H4O5)2 and CsB(DL-C4H4O5)2⋅H2O have been grown.
• They display diverse framework geometries attributable to the size of the cations.
• NaB(DL-C4H4O5)2 crystallizes in the noncentrosymmetric monoclinic space group P2.
• Both crystals have absorption edges about 220 nm in the UV region.
• NaB(DL-C4H4O5)2 exhibits a NLO efficiency of 2 times that of KDP (KH2PO4) standard.
Two new alkali-metal bidenate borate–malate NaB(DL-C4H4O5)2 and CsB(DL-C4H4O5)2⋅H2O have been grown by the facile slow evaporation method through the introduction of acetone as solvent. The crystal structures were determined by single crystal X-ray diffraction. The stoichiometrically equivalent materials crystallize in three-dimensional framework structures and have the same structural unit [B(C4H4O5)2]−. However, both crystals exhibit very diverse framework geometries attributable to the size of the alkali-metal cations, which also leads to the different space groups and macroscopic centricities as proven by SHG test. The noncentrosymmetric NaB(DL-C4H4O5)2 was found to exhibit phase-matchable NLO intensity as high as two times that of KDP standard and a short-wavelength absorption onset at 220 nm. Moreover, both crystals have also been characterized by Infrared spectroscopy and thermogravimetric analysis.
Two novel semiorganic borates NaB(DL-C4H4O5)2 and CsB(DL-C4H4O5)2H2O display different framework geometries attributable to the size of the alkali-metal cations. NaB(DL-C4H4O5)2 exhibits SHG intensity as high as two times that of KDP.Figure optionsDownload as PowerPoint slide
Journal: Journal of Alloys and Compounds - Volume 582, 5 January 2014, Pages 374–379