目的:研究盐酸林可霉素2种晶型晶体结构中不同分子构象对其漫反射红外光谱行为的影响。方法:单晶 X 射线衍射法、傅立叶变换漫反射红外光谱法。结果:盐酸林可霉素2种晶型分属不同晶系及空间群。它们在晶胞中的分子内、分子间氢键与分子...目的:研究盐酸林可霉素2种晶型晶体结构中不同分子构象对其漫反射红外光谱行为的影响。方法:单晶 X 射线衍射法、傅立叶变换漫反射红外光谱法。结果:盐酸林可霉素2种晶型分属不同晶系及空间群。它们在晶胞中的分子内、分子间氢键与分子构象不同,从而造成其漫反射红外光谱行为的显著差别。结论:可用傅立叶变换红外漫反射光谱法鉴别盐酸林可霉素2种晶型。展开更多
Two borate-carbonates Ba4M(CO3)2(BO3)2(M =Ba, Sr) have been successfully synthesized in the open air representing the first examples of borate-carbnate complex.Their structures were determined by single crystal X-ray ...Two borate-carbonates Ba4M(CO3)2(BO3)2(M =Ba, Sr) have been successfully synthesized in the open air representing the first examples of borate-carbnate complex.Their structures were determined by single crystal X-ray diffraction and they both crystallize in same space group, Pnma.Their structures feature a Ba/Sr-based three dimensional framework composed of the BaO8 polyhedra(the SrO8 polyhedra), isolated BO3 and CO3 triangles. Detailed structure analysis shows that the intergrowth of [Ba3(BO3)2]/[Ba2Sr(BO3)2] and [BaCO3] layers favors the formation of these two borate-carbonates. In addition, their syntheses, spectroscopic properties and thermal behaviors were investigated.展开更多
文摘目的:研究盐酸林可霉素2种晶型晶体结构中不同分子构象对其漫反射红外光谱行为的影响。方法:单晶 X 射线衍射法、傅立叶变换漫反射红外光谱法。结果:盐酸林可霉素2种晶型分属不同晶系及空间群。它们在晶胞中的分子内、分子间氢键与分子构象不同,从而造成其漫反射红外光谱行为的显著差别。结论:可用傅立叶变换红外漫反射光谱法鉴别盐酸林可霉素2种晶型。
基金supported by the Key Research Project of Frontier Science of CAS (QYZDB-SSW-JSC049)the Western Light Foundation of CAS (2016-QNXZ-A-2)Xinjiang International Science & Technology Cooperation Program (2017E01014)
文摘Two borate-carbonates Ba4M(CO3)2(BO3)2(M =Ba, Sr) have been successfully synthesized in the open air representing the first examples of borate-carbnate complex.Their structures were determined by single crystal X-ray diffraction and they both crystallize in same space group, Pnma.Their structures feature a Ba/Sr-based three dimensional framework composed of the BaO8 polyhedra(the SrO8 polyhedra), isolated BO3 and CO3 triangles. Detailed structure analysis shows that the intergrowth of [Ba3(BO3)2]/[Ba2Sr(BO3)2] and [BaCO3] layers favors the formation of these two borate-carbonates. In addition, their syntheses, spectroscopic properties and thermal behaviors were investigated.
