染料敏化稀土离子修饰二氧化钛纳米晶电极的光电化学性质

制备了N3染料敏化的稀土离子表面修饰二氧化钛纳米晶电极. 由于在新电极表面形成了一个势垒, 这个势垒可以有效地抑制电极表面的电荷复合, 因此改善了电极的光电转化性质. 其中N3染料敏化Yb³⁺离子修饰TiO₂电极在73.1 mW/cm²白光照射下的光电转化效率比TiO₂电极增大了15%.     

STUDIES ON RARE EARTH COMPLEXES OF QUARTERNARY AMMONIUM SALT——SYNTHESIS AND CRYSTAL STRUCTURE OF TETRAKIS-(TRIMETHYL-HEXADECYL AMMONIUM)DECANITRATO DINEODYMATE,((CH_3)_3C_(16)H_(33)N)_4Nd_2(NO_3)_(10)

A series of binuclear eleven-coordinated rare earth complexes with long chain quarternary ammonium salt have been synthesized. The general formula of the complexes may be represented by((CH_3)_3 C_(16)H_(33)N)_4Ln_2(NO_3)_(10) where Ln is La, Ce, Pr, Nd, Sm, Eu, Ga, Ho, Er or Y. The TG curve, the magnetic moment and the dissociation degree of the Nd complexes in alcoholic solution have been determined.((CH_3)_3C_(16)H_(33)N)_4 Nd,_2NO_3)_(10) was chosen as a representative of the complexes for the crystal structure determination. The crystal is monoclinic with space group P. Each Nd atom is coordinated by four terminal nitrate groups bidentately, and two Nd atoms are connected through two O atoms of the nitrate groups forming binuclear complex. Therefore, each Nd atom is surrounded by eleven oxygen atoms. The average bond length of the eleven Nd-O bond is 2.57, while the Nd-O bond length on the oxygen-bridge is 2.62.     

协萃络合物结构的研究——二(1-苯基-3-甲基-4-三氟乙酰基吡唑啉酮-5)-(1,10菲啰啉)合钴(Ⅱ)的合成、表征与晶体结构的测定

合成了二(1-苯基-3-甲基-4-三氟乙酰基吡唑啉酮-5)-(1,10菲啰啉)合钴(Ⅱ)混合配体络合物单晶,由元素分析确定其组成为Co(C_(12)H_3F_3O_2N_2)_2·(C_(12)H_8N_2)。通过溶解性、摩尔电导,磁性、中红外光谱、远红外光谱、差热、热重分析研究了该化合物的有关性质。用四园单晶衍射仪,测定了该络合物的分子及晶体结构。晶体属单斜晶系,P2_(l/o)空间群,晶胞参数为:a=10,422(3),b=16,462(2),c=20.678(3),β=75.86(1)°,V=3440.2(1.6)~3,Z=4,F(000)=1580,d_(calc)=1.50g cm~(-3),d_(exp.)=1.492g cm~(-3)。经最小二乘法修正后,最终偏差因子R=0.0716。配合物中钴的配位数为六,分子中有四个氧来自两个双齿配体PMTFP,两个氮原子由phen所提供。     

强荧光铽配合物LB膜光学微腔

在光学微腔中,最典型的结构是Ｆａｂｒｙ－Ｐｅｒｏｔ平面谐振腔,它由两个互相平行的反射镜组成,两镜之间放置工作物质．常用的反射镜有两类：介质镜和金属镜［１］．介质镜由具有不同介电常数的一系列物质相互层叠制成,这种“镜”对某一特定波段的电磁波具有优良的反...     

Bei四羧酸铈在TiO2纳米晶膜上的光电转化性质

报道了Ce^3 和Ce^4 两种金属离子桥联Bei四羧酸在二氧化钛纳米晶电极上自组装膜的制备,并利用紫外可见光谱、红外光谱、光电子能谱等手段对自组装膜进行了表征．通过同步辐射光电子能谱确定了自组装膜的HOMO能级．基于自组装膜缺化二氧化钛纳米晶电极的薄层三明治型太阳能电池具有较好的光电传化性质．在480nm,Bei四羧酸敏化二氯化钛电极产生了26．9％的入射单色光子-电子转化效率(IPCE),而由Ce^4 离子或Ce^3 离子桥联所形成的自组装膜分别产生了55．8％和39.1％的IPCE．金属离子桥联Bei四羧酸自组装膜相当于一种配合物,其HOM0能级比Bei四羧酸自组装膜的高,这是形成铈离子桥联Bei四羧酸后IPCE提高的一个主要原因,     

稀土季铵盐配合物的研究(VI)——四硝酸二硫氰酸合钕酸四丁基铵的合成、表征和晶体结构

合成了一种新型混合配体标题配合物,研究了该配合物的中红外光谱和热谱;测定了在乙醇溶液中的摩尔电导,证明其屑3:1型电解质。用四圆衍射仪测定了晶体结构,属单斜晶系,Cc空间群,晶胞参数:a=1.6578nm,b=1.8108nm,c=2.3962nm;β=91.58°,Z=4,中心离子钕被来自4个硝酸根的8个氧原子和硫氰酸根的2个氮原子所配位,配位数为10同。Nd—O平均键长为0.2567nm;Nd—N平均键长为0.2534nm。配位多面体为扭曲的双帽四方反棱柱体。     

染料敏化纳米晶太阳能电池

半导体纳米晶颗粒形成的膜具有非常大的比表面积，其表面上可以吸附大量的染料分子，因而可以有效地吸收太阳光，并将其转化为电能。本文介绍了染料敏化纳米晶太阳能电池的基本原理以及电池的结构。从电池各个组成部分分别介绍了染料敏化纳米晶太阳能电池的发展及其研究现状。     

Interaction between nitric oxide and lipid-like DDPA LB film investigated with SHG and AFM

Interactions between Nitric oxide (NO) and DDPA Langmuir-Blodgett (LB) film are investigated with second harmonic generation (SHG) and atomic force microscopy (AFM). It has been found that the adsorption of NO molecules on DDPA LB film only changes the value of the second-order susceptibility of the DDPA molecule on film but not its orientation.     

Effect of different metal ions in a new kind of functionalized self-assembled films of trinary complexes on its photoinduced electron transfer property

Three new kinds of self-assembled films were first fabricated through a new strategy. These films have Sn4 , Zr4 and Ce4 as bridging central ions, 3, 4, 9, 10-perylene tetracarboxylic acid (PTA) as functional molecules and oxalic acid as connecting ligand. All films were characterized by contact angle, UV spectra, X-ray photoelectron spectra (XPS) and cyclic voltammetry. The effects of light intensity, bias voltage, and electron donor on photocurrents of these films were also studied.     

稀土配合物的光致发光和电致发光研究

报道了稀土配合物在光致发光和电致发光的应用,从结构和性能的角度,分析了沁同稀土配合物的发光特性以及不同第一配体和第二配体对光致发光和电致发光的影响。