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Zwitterionic amino acids as precursors for nonmetal cation pentaborate salts
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2020-05-18 , DOI: 10.1002/jccs.202000056 Ümit Sizir 1 , Ömer Yurdakul 1 , Dursun Ali Köse 1 , Okan Içten 2
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2020-05-18 , DOI: 10.1002/jccs.202000056 Ümit Sizir 1 , Ömer Yurdakul 1 , Dursun Ali Köse 1 , Okan Içten 2
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Nonmetal cation (NMC) pentaborate structures were synthesized using the amino acid molecules as cations precursors. Chemical composition analysis, infrared spectroscopy, mass analysis, boron nuclear magnetic resonance, and thermal gravimetric analysis (TGA/DTA) methods were used for structural characterization. The hydrogen storage efficiency of molecules was also determined experimentally. The recorded infrared spectra support the structural similarities of the molecules. Stretchings of pentaborate rings and characteristic peaks of amino acids were detected in infrared spectra. When the thermal analysis curves were recorded, it was found that the structures showed similar decomposition steps. Due to the result of thermal decay, glassy boron oxide (B2O3) formation was observed as the final decomposition products of all molecules. Peaks associated with boric acid, triborate, and pentaborate were observed in the 11B spectra of these salts. Powder X‐ray diffraction spectroscopy supports the presence of BO3 and BO4− groups regarding the presence of pentaborate rings. It also indicates the high crystallinity of the structures. The molecular cavities detected by brunauer–emmett–teller analysis were found to be 3.586, 1.922, 1.673, and 1.923 g/cm3. Low‐molecular cavities can be attributed to the high hydrogen‐bonding capacity of the structures. The hydrogen capture efficiency of the pentaborate salts was found to be in the range of 0.039‐0.
中文翻译：
两性离子氨基酸作为非金属阳离子五硼酸盐的前体
使用氨基酸分子作为阳离子前体合成了非金属阳离子（NMC）的五酸酯结构。化学成分分析，红外光谱，质量分析，硼核磁共振和热重分析（TGA / DTA）方法用于结构表征。还通过实验确定了分子的储氢效率。记录的红外光谱支持分子的结构相似性。在红外光谱中检测到五齿环的伸展和氨基酸的特征峰。记录热分析曲线时，发现结构显示出相似的分解步骤。由于热衰减的结果，玻璃状氧化硼（B 2 O 3观察到形成是所有分子的最终分解产物。在这些盐的11 B光谱中观察到了与硼酸，三硼酸盐和五硼酸盐相关的峰。粉末X射线衍射光谱法支持BO的存在3和BO 4 -基团关于五硼酸环的存在。这也表明结构的高结晶度。通过布鲁诺尔-埃默特-泰勒分析检测到的分子腔为3.586、1.922、1.673和1.923 g / cm 3。低分子腔可归因于结构的高氢键结合能力。发现五硼酸盐的氢捕获效率为0.039-0。
更新日期：2020-05-18
中文翻译：
两性离子氨基酸作为非金属阳离子五硼酸盐的前体
使用氨基酸分子作为阳离子前体合成了非金属阳离子（NMC）的五酸酯结构。化学成分分析，红外光谱，质量分析，硼核磁共振和热重分析（TGA / DTA）方法用于结构表征。还通过实验确定了分子的储氢效率。记录的红外光谱支持分子的结构相似性。在红外光谱中检测到五齿环的伸展和氨基酸的特征峰。记录热分析曲线时，发现结构显示出相似的分解步骤。由于热衰减的结果，玻璃状氧化硼（B 2 O 3观察到形成是所有分子的最终分解产物。在这些盐的11 B光谱中观察到了与硼酸，三硼酸盐和五硼酸盐相关的峰。粉末X射线衍射光谱法支持BO的存在3和BO 4 -基团关于五硼酸环的存在。这也表明结构的高结晶度。通过布鲁诺尔-埃默特-泰勒分析检测到的分子腔为3.586、1.922、1.673和1.923 g / cm 3。低分子腔可归因于结构的高氢键结合能力。发现五硼酸盐的氢捕获效率为0.039-0。
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