| 引用本文: | 王晓钧,丁士明,蒋海青,白秀玲,范成新.湖泊磷的核磁共振(NMR)分析——1环境标准样品的31P-NMR表征.湖泊科学,2008,20(1):45-50. DOI:10.18307/2008.0107 |
| WANG Xiaojun,DING Shiming,JIANG Haiqing,BAI Xiuling,FAN Chengxin.Characterizing phosphorus in environmental model samples by 31P-NMR. J. Lake Sci.2008,20(1):45-50. DOI:10.18307/2008.0107 |
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| 摘要: |
| 通过对环境标准样进行31P-NMR测试,研究了磷的化学结构与化学位移的关系.结果表明:无机正磷酸盐(PO43-)化学位移在6.412×10-6,焦磷酸盐的化学位移在-4.353×10-6;多聚磷的化学位移分布特点是:主链末端磷化学位移在-3.53×10-6至-4.40×10-6之间,中间磷在-18.159×10-6至-20.246×10-6之间,有机磷中单酯和二醑的化学位移分别在4.3540×10-6至6.3652×10-6和-0.107×10-6至2.195×10-6之间,部分二脂不稳定,会降解为单脂;膦酸盐的化学位移在18.670×10-6至21.460×10-6之间,磷酸肌酸位于-0.380×10-6,有机多聚磷中α-P的化学位移在-8.833×10-6至-9.449×10-6之间,由于偶合作用产生P峰的裂分,P峰的偶合符合核磁中n+1的规则.结构环境影响31P的化学位移值的偏移. |
| 关键词: 环境标准样 P核磁共振 化学位移 沉积物 |
| DOI：10.18307/2008.0107 |
| 分类号: |
| 基金项目:国家自然科学基金项目(40611087);院长奖获得者科研启动专项资金;中国科学院南京地理与湖泊研究所所长科研专项基金联合资助. |
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| Characterizing phosphorus in environmental model samples by 31P-NMR |
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WANG Xiaojun1,2, DING Shiming1, JIANG Haiqing2, BAI Xiuling2, FAN Chengxin2
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1.College of Material Science and Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| By testing a series of solution 31P-NMR spectroscopy of model phosphorus compounds including inorganic phosphate,orthophosphate monoesters and diesters, and organic polyphosphate(determined in 1mol/L NaOH and 16.7% D2O), standard phosphorusspectra were obtained as references for solution 31P-NMR studies of sediment phosphorus. The results showed that the 31P-NMRsignals of phosphorus compounds interested in environmental studies generally fall between 6.5×10-6 and -25×10-6, includingorthophosphate at 6.412×10-6, pyrophosphate at -4.353×10-6, polyphosphate at -18.159×10-6 to -20.246×10-6 (middle group P) and-3.53×10-6 to -4.40×10-6 (terminal P), orthophosphate monoesters at 4.3540×10-6 to 6.3652×10-6, orthophosphate diesters at-0.107×10-6 to 2.195×10-6, and organic polyphosphate at -8.833×10-6 to 9.499×10-6 for the α-P. Structure surroundings effect thechemical shifts of phosphorus compounds. |
| Key words: Environmental model compounds 31P-NMR chemical shift sediment |
