1,3-二吡啶基苯和4,4′-二羧基二苯砜构筑的钴(Ⅱ)配合物合成、结构和性质(英文)

以两种V型的配体4,4′-二吡啶基苯(1,3-dpb)和4,4′-二羧基二苯砜(H2sdb),和钴(Ⅱ)通过溶剂热反应合成了1个配位聚合物{[Co(dpb)(sdb)(H2O)2]·2H2O·DMF}n(1)。对其进行了红外、热重、粉晶衍射、单晶衍射等表征,配合物属于三斜晶系,空间群P1。其中Co(Ⅱ)的2个顶点被水分子占据,相邻的钴(Ⅱ)离子连接着1,3-二吡啶基苯和4,4′-二羧基二苯砜形成一维的双绳链,相邻的链之间通过羧基-配位水和配位水-配位水间的氢键相互连接形成二维的层状结构,层状结构之间通过砜基-配位水间的氢键又相互连接形成三维结构。此外,还研究了配合物的固体紫外-可见光谱。

配合物[Ni~Ⅲ(chxn)_2Br]Br_2、[Ni~Ⅱ(chxn)_2]Br_2和[Ni~Ⅱ(en)_2]Br_2的合成与荧光性质

在氮气的保护下,以无水甲醇为溶剂合成了几种以chxn(chxn=1(R),2(R)-环己二胺)和en(en=乙二胺)为配体的镍配合物,单晶结构分析和元素分析确定其组成。并对其进行了UV-Vis吸收光谱、荧光光谱的测定和比较,结果表明镍的二价和三价配合物在紫外可见区吸收带的位置和强度明显不同,几种配体和配合物均具有较好的荧光性质,配体荧光图谱显示荧光发射峰在408 nm,荧光量子效率高,而合成的三价镍配合物荧光发射峰则紫移至360 nm左右。

A new method for storing Ag nanoparticles

Silver nanoparticles were obtained by reduction method. Various techniques, such as UV-Vis spectroscopy, transmission electron microscopy （TEM） and light-scattering spectroscopy, were used to characterize nanoparticles. Sodium borohydride or sodium citrate was adopted as reduction regent, and polyvinyl alcohol or polyethylene glycol was adopted as stabilizing regent. An experimental condition was studied in detail. After the water was eliminated, the silver nanoparticle was fixed in the solid polymer. The silver nanoparticle in polymer could be re-dissolved in water. It was found that light scattering characteristic of silver nanoparticle storied in polymer was not changed. A new method of storing silver nanoparticles in solid polymer was given in this paper.