A New Inorganic-organic Nanocomposite, 4,4＇ -Bipyridine Intercalated into Lamellar FePS3

A new intercalation compound, Fe0.85PS3(4,4‘-bipyH)0.30 (4,4‘-bipy = 4,4‘-bipyridine), is obtained by the intercalation of 4,4‘-bipyridine-2HCl with lamellar FePS3, which is characterized by elemental analysis, powder X-ray diffraction, infrared spectroscopy. By comparison with the pure FePS3, the lattice spacing of Fe0.85PS3(4,4‘-bipyH)0.30 is expanded by ～5.7A, indicating that the ring plane of the guest is perpendicular to the layer of the host. The magnetic property ofFeo.85PS3(4,4‘-bipyH)0.30 is studied with SQUID. It exhibits an antiferromagnetic phase transition with TN of about 70 K.     

A New Loop Algebra and Corresponding Computing Formula of Constant γ in Quadratic-Form Identity

A new loop algebra containing four arbitrary constants is presented, -whose commutation operation is concise, and the corresponding computing formula of constant γ in the quadratic-form identity is obtained in this paper, which can be reduced to computing formula of constant γ in the trace identity. As application, a new Liouville integrable hierarchy, which can be reduced to AKNS hierarchy is derived.     

CHROMATIC NUMBER OF SQUARE OF MAXIMAL OUTERPLANAR GRAPHS

Let x（G^2） denote the chromatic number of the square of a maximal outerplanar graph G and Q denote a maximal outerplanar graph obtained by adding three chords y1 y3, y3y5, y5y1 to a 6-cycle y1y2…y6y1. In this paper, it is proved that △ ＋ 1 ≤ x（G^2） ≤△ ＋ 2, and x（G^2） = A ＋ 2 if and only if G is Q, where A represents the maximum degree of G.     

一类集合剖分的等幂和问题

本文从几个富有启发性的问题出发,探究一类集合剖分的等幂和问题,得到了一般情况下的结论,介绍了具体的构造方法.     

面和空间的剖分

立体几何学习中，线分面、面分空间是我们常见的问题，下面的推导，希望能为大家的学习带来方便．     

红外光谱微机数据库

PC-IR大型红外光谱微机数据库系统 ,包含了全套标准红外光谱集的 6万张光谱数据 ,是世界上最大的一种纯化合物红外光谱微机数据库。系统已通过省级鉴定。鉴定指出 :“其规模和性能已达到国际先进水平。”该成果先后获福建省医卫科技进步一等奖 ,福建省政府科技进步二等奖 ,卫生部优秀软件奖。按照未知样品的红外谱图 ,根据系统的屏幕提示 ,用户由键盘输入各主要吸收峰的波数和透过率值 ,即可进行自动检索。系统给出库中与样品光谱相同或最相近的若干种化合物的图谱序号 ,熔点状态 ,分子式及相似性得分。该系统可在 3 86,486,5 86等微机或 …