Synthesis, crystal structures, and photophysical properties of triphenylamine-based multicyano derivatives

A new series of intramolecular charge transfer (ICT) molecules were synthesized by attaching various strong electron-withdrawing groups to a triphenylamine backbone. Relationships between chemical structures and optoelectronic properties of these compounds were investigated with X-ray diffraction, cyclic voltammetry, absorption spectroscopy, and density functional theory calculations. It is shown that the compounds exhibit intensive ICT interactions leading to substantial extension of their absorption spectral response, which may be potentially used for efficient solar cells.     

Non-reflective Event Locating Based on Impulse Response in Optical Time-domain Measurement

１ＩｎｔｒｏｄｕｃｔｉｏｎＯｐｔｉｃａｌｔｉｍｅｄｏｍａｉｎｒｅｆｌｅｃｔｏｍｅｔｒｙ（ＯＴＤＲ）ｉｓａｃｏｍｍｏｎｌｙｕｓｅｄｔｅｃｈｎｉｑｕｅｆｏｒｃｈａｒａｃｔｅｒｉｚａｔｉｏｎａｎｄｆａｕｌｔｌｏｃａｔｉｎｇｏｆｏｐｔｉｃａｌｆｉｂｅｒｔｒａ...     

Assembly of lanthanide coordination polymers with one dimensional channels

Three new Lanthanide 2-aminoterephthalate coordination polymers: [Pr₂(C₈H₅NO₄)₃·(H₂O)₅]·2H₂O 1, [Tb(C₈H₅NO₄)_1.5(H₂O)₂]·2H₂O 2 and [Eu(C₈H₅NO₄)_1.5(H₂O)₂]·2H₂O 3, were obtained by the hydrothermal synthesis. Crystal data: Complex 1. Triclinic, space group P-1, a=10.391(1), b=15.056(1), c=10.121(1) Å. α=101.363(4), β=101.115(3), γ=105.737(3)°, Complex 2. Triclinic, space group P-1, a=10.137(1), b=10.353(1), c=9.469(1) Å. α=95.443(3), β=110.649(4), γ=110.547(4)°. Complex 3. Triclinic, space group P-1, a=10.174(1), b=10.388(1), c=9.480(1) Å. α=95.443(6), β=110.732(3), γ=110.287(5)°. These carboxyl groups link Ln³⁺ via the chelating or bridging bond construct one-dimension channels in which pendant function groups can further connect with guest water molecules in channels through hydrogen bond.     

四核铜原子簇化合物Cu4(c-C6H11CSS2)4的合成和结构研究

环己基甲荒酸六氢吡啶盐与氯化铜反应,产物经二硫化碳重结晶,得四核铜原子簇化合物Cu_4(c-C_6H_(11)CSS_2)_4,用X射线单晶衍射法测定了它的晶体结构,其空间群为C_(4h)~4-P4_2/n晶胞参数a=b=15.125(5)(?),c=8.514(2)(?),α=β=γ=90°,V=1948(1)(?)~3,Z=2,929个衍射点参与修正,R=0.040.分子中Cu_4呈变形四面体构型。产物形成时,c-C_6H_(11)CSS~-与Cu~(2+)有氧化-还原反应发生。文章对产物形成的机理作了探讨。     

Cd(Ⅱ)—正己烷基亚氨二乙酸根离子—氯离子的混配型配合物的研究

本文提出了一种强酸盐和标准碱两种溶液同时滴定的pH电位法,以简化金属离子—有机配体—强酸根离子体系的混配型配合物的研究方法。根据该实验方法,推导出在不生成酸式及多核配合物情况下混配型配合物稳定常数的计算公式。 研究了Cd(Ⅱ)—正己烷基亚氨二乙酸根离子(A)—氯离子(Cl)体系的配位平衡,在所研究范围内形成CdACl、CdACl_2,在25±0.1℃,μ=1.0的条件下,测得lgβ_(11)=7.60,lgβ_(12)=8.12。 讨论了两种溶液滴定法的优缺点及适用范围。该法具有快速、准确、仪器设备简单等特点。     

Syntheses and X-ray crystal structures of dumbbell-shaped bis-fullerene tungsten and molybdenum complexes

In the first neutral bis-fullerene complexes with tungsten(0) and molybdenum(0) [M(eta 2-C60)2(CO)2(dbcbipy)] [M = W and Mo, dbcbipy = 4,4'-di(butyl carboxyl)-2,2'-bipyridine] synthesized in solution, the metal atom coordination is distorted octahedral with two CO groups and the bipy group of dbcbipy in the equatorial plane and the metal atom binding in an eta 2-fashion to C-C bonds of two C60 at axial orientation to give a dumbbell shaped molecule.     

Catalytic asymmetric [2,3]-sigmatropic rearrangement of sulfur ylides generated from copper(I) carbenoids and allyl sulfides

Catalytic asymmetric sulfur ylide [2,3]-sigmatropic rearrangement of carbenoids generated from aryldiazoacetates has been investigated with a number of chiral Rh(II) and Cu(I) catalysts, and moderately high enantioselectivity (52-78% ee) can be achieved with Cu(MeCN)(4)PF(6)/2,2'-isopropylidenebis[(4S)-4-tert-butyl-2-oxazoline].     

Synthesis and crystal structure of a novel decanuclear silver cluster complex [Ag(SC6H2Pri(3)-2,4,6)](10).2CHCI3.C2H5OH

The cluster [Ag(SC6H2Pri(3)-2,4,6)]10 (1) contains a 20-membered ring of alternating silver and sulfur atoms, which is compactly folded; the sulfur atoms are doubly bridging and each silver atom exhibits linear two-coordination in the primary Ag-S interactions.     

1，2-和1，4-萘醌248 nm激光光解的瞬态吸收光谱研究

利用纳秒级激光光解动态吸收光谱装置,研究１,２－和１,４－萘醌中性水溶液的瞻态吸收光谱,发现１,２－萘醌及,１,４－萘醌被光电离合形成的阳离子自由基在３８０ｎｍ均有最大吸收,但１,４－萘阳离子自由基在衰变过程中又形成了两种新的活性粒子,它们的最大吸收分别位于４１０和５８０ｎｍ,分析表明：４１０ｎｍ属于１,４－蔡醌脱氢自由基的吸收,而５８０ｎｍ很可能归属由于于４１０和５８０ｎｍ,分析表明：４１０ｎｍ     

利用鞍点近似法计算串音对阵列波导光栅复用器性能的影响

基于光的波动性,考虑信号和串音偏振态,改进了鞍点近似法的数学模型,计算了阵列波导光栅复用器的误码率和功率代价,并与高斯近似法和实验结果进行了比较,显示出较高的计算精度。