A novel 1-D Cd( coordination polymer, [Cd( p-BDOA)·2H2O]n (I) ( p-BDOA2-=benzene-1,4-dioxyacetate dianion) has been synthesized and characterized by elemental analysis, IR, PL, TG and X-ray single crystal diffraction. The Crystal crystallizes in monoclinic system, the space group is C2/c, with the crystal cell parameters a=1.175 1(1) nm, b=0.551 0(1) nm, c=1.827 7(2) nm, β=96.14(2)°, and V=1.176 6(3) nm3,, Mr=372.60, R=0.045 9, wR=0.127 9. The Cd( ion has a trigonal prism coordination configuration that defined by four carboxyl O atoms from two different p-BDOA2- ligands and two water molecules. Adjacent Cd( ions are linked by carboxylate groups with the bidentate coordination mode, giving rise to a chain structure with the adjacent Cd...Cd distance of 1.526 3(5) nm. Furthermore, such chains are linked by hydrogen bonds to form supramolecular network. The results of PL and TG show that the complex exhibits intense fluorescent emissions and its chain skeleton is thermally stable up to 419 K. CCDC: 220443.
The silicate oxyapatites Ca2-3xLa8+2x□x（SiO4）6O2 （x=0, 0.17, 0.33, 0.50, 0.67） was synthesized via a sol-gel method at low temperature. The apatite phases have been characterised by X-ray diffraction （XRD）, conducting properties was studied by electrical chemistry impedance spectroscopy （EIS）. The conductivity of La9.33□0.67（SiO4）6O2 is 1.58 × 10-3 S·cm-1 at 700 ℃, it is higher about 4 270 times than that of Ca2La8（SiO4）6O2, the activation energy is decreasing from 1.37 eV to 0.84 eV. With cation vacancies increasing,the conducting mechanism is gradually translation from a direct linear pathway free oxygen ion conduction to a curve pathway interstitial oxygen ion conduction. The electrical conductivities is almost independent of the oxygen partial pressure, this suggests that the oxyapatites exhibited almost pure O2- ion conduction over a wide range of oxygen partial pressure.
为了得到分子排列有序的酞菁薄膜,提高材料的气敏特性,选取四-α-(2,2,4-三甲基-3-戊氧基)酞菁铜在亲水基片上以Z型成膜方式拉制了多层LB膜.膜崩溃压为60 mN·m-1,分子极限面积为0.38 nm2.用偏振紫外测定了酞菁铜分子在LB膜中的取向,结果表明四-α-(2,2,4-三甲基-3-戊氧基)酞菁铜分子以60.9°倾斜角倾斜排列于基质上,且分子之间以J-聚集态存在.室温下四-α-(2,2,4-三甲基-3-戊氧基)酞菁铜LB膜对体积分数为2×10-5的乙醇气体有响应,对体积分数为1×10-4的乙醇气体的响应时间为2 min,恢复时间为1 min.
本文制备了2,9,16,23-四异丙氧基和2,9,16,23-四对甲基苯氧基2种酞菁铜(CuPc(OC3H7-i)4,CuPc(OC7H7)4,简称为烷氧基酞菁铜和苯氧基酞菁铜),并在基片上成功制得了二者的旋涂膜。利用AFM(Atomic force microscope)、UV-Vis和FTIR对薄膜的表面形貌和谱学性质进行了分析。结果表明,以一定的旋转速度进行涂膜,可以获得较为均匀的酞菁铜薄膜,并且2种取代基团的酞菁表面形貌有着较为明显的差别。在室温下测试了2种酞菁薄膜对甲醇和乙醇气体的敏感性能,结果显示薄膜对测试的醇类有较高的灵敏度,对乙醇的灵敏度要大于甲醇,在同种测试气氛下苯氧基酞菁铜薄膜的气敏性能要高于烷氧基酞菁铜薄膜。2种薄膜对浓度为30μL·L-1乙醇气体的响应和恢复时间分别在30s和60s内。
