The effect of central metal atom on the electrical properties of phthalocyanine macromolecule

In order to investigate the effect of the central metal atom variation on the electrical properties of phthalocyanine macromolecule, iron, cobalt, nickel and copper as the di-valent metals were incorporated into the macrocycle. The electrical properties of these metallophthalocyanines were then studied to establish a structure-property relation-ship. The experimental data show that electrical parameters are greatly influenced by the choice of metal atom. It remains to be investigated whether results are dominantly interpretable in terms of the size of the metal, intermolecular π-electron delocalization of the macrocycle, or other molecular orbital property.     

酞菁蓝BGS颜料的生产工艺研究

通过选择表面活性剂试验和研磨料配比试验。生产出了抗结晶的酞菁蓝ＢＧＳ颜料，并介绍了长期生产实践中总结出的经验和体会。     

聚合度和磺化度对油井水泥外加剂SPS性能的影响

本文测定了室内合成聚苯乙烯磺酸钠（ＳＰＳ）样品处理的Ｇ级水泥浆表现粘度、样品抗盐析能力及在Ｇ级水泥上的吸附量，讨论了ＳＰＳ的聚合度和磺化反对ＳＰＳ在水泥浆中减阻效果的影响。ＳＰＳ样品以废旧聚苯乙烯塑料为原料制备。     

Electrocatalytic oxidation of thiocyanate, l-cysteine and 2-mercaptoethanol by self-assembled monolayer of cobalt tetraethoxy thiophene phthalocyanine

Catalytic activity of a self-assembled monolayer (SAM) of cobalt tetra ethoxythiophene phthalocyanine (CoTEThPc-SAM) complex towards oxidation of thiocyanate (SCN⁻), l-cysteine (CYS) and 2-mercaptoethanol (2-ME) is reported. The oxidation of thiocyanate occurs via a two electron transfer, whereas l-cysteine and 2-ME require 1 electron. The oxidation of thiocyanate is catalysed by ring based processes, while l-cysteine is catalysed by both Co^III/Co^II process and by ring based processes. 2-ME is catalysed by Co^III/Co^II process. The oxidation of thiocyanate on CoTEThPc was performed in acid media instead of basic media commonly employed. The reaction order was found to be unity for all the analytes, showing that only one molecule of analyte interacts with one molecule of the catalyst during the rate determining step.     

十六氯酞菁铁对Li/SOCl2电池的催化作用

以四氯邻苯二甲酸酐、尿素、FeCl2 4H2O为原料,合成了十六氯酞菁铁(FePcCl16),用元素分析、红外、紫外-可见光谱对产物进行了分析。FePcCl16具有较高的催化活性,对于大电流和低温放电尤其显著,并对放电电压滞后和放电时温升有较好的抑制作用。在常温和40mA/cm2的电流密度下,相对于不含FePcCl16的ER34185型电池,含1.0g/LFePcCl16的电池的电压和容量分别提高了174mV和830mAh。     

Metastable Copper‐Phthalocyanine Single‐Crystal Nanowires and Their Use in Fabricating High‐Performance Field‐Effect Transistors

This paper describes a simple, vapor‐phase route for the synthesis of metastable α‐phase copper‐phthalocyanine (CuPc) single‐crystal nanowires through control of the growth temperature. The influence of the growth temperature on the crystal structures, morphology, and size of the CuPc nanostructures is explored using X‐ray diffraction (XRD), optical absorption, and transmission electron microscopy (TEM). α‐CuPc nanowires are successfully incorporated as active semiconductors in field‐effect transistors (FETs). Single nanowire devices exhibit carrier mobilities and current on/off ratios as high as 0.4 cm² V^?1 s^?1 and >10⁴, respectively.     

Organic Photovoltaic Cells Based On Solvent‐Annealed,Textured Titanyl Phthalocyanine/C60 Heterojunctions

Organic photovoltaic cells (OPV) with good near‐IR photoactivity are created from highly textured titanyl phthalocyanine (TiOPc)/C₆₀ heterojunctions. Vacuum deposited TiOPc thin films are converted to the near‐IR absorbing “Phase II” polymorph using post‐deposition solvent annealing. The Phase I → Phase II transition broadens the absorbance spectrum of the Pc film producing absorptivities (α ≈ 10⁵ cm^?1) from 600–900 nm, along with substantial texturing of the Pc layer. Atomic force microscopy and field‐emission scanning electron microscopy of the solvent annealed films show that the surface roughness of the Pc layers is increased by a factor of greater than 2× as a result of the phase transformation. Current–voltage (J–V) responses for white light illumination of ITO (100 nm)/TiOPc (20 nm)/C₆₀ (40 nm)/BCP (10 nm)/Al (100 nm) OPVs show a near doubling of the short‐circuit photocurrent (J_SC), with only a small decrease in open‐circuit photopotential (V_OC), and a concomitant increase in power conversion efficiency. Incident photon current efficiency (IPCE) plots confirmed the enhanced near‐IR OPV activity, with maximum IPCE values of ca. 30% for devices using Phase II‐only TiOPc films. UV‐photoelectron spectroscopy (UPS) of TiOPc/C₆₀ heterojunctions, for both Phase I and Phase II TiOPc films, suggest that the Phase II polymorph has nearly the same HOMO energy as seen in the Phase I polymorph, and similar frontier orbital energy offsets, E_HOMO^Pc–E_LUMO^C60, leading to comparable open‐circuit photovoltages. These studies suggest new strategies for the formation of higher efficiency OPVs using processing conditions which lead to enhance near‐IR absorptivities, and extensive texturing of crystalline donor or acceptor films.     

Dispersions of carbon nanotubes in sulfonated poly[bis(benzimidazobenzisoquinolinones)] and their proton-conducting composite membranes

A sulfonated poly[bis(benzimidazobenzisoquinolinones)] (SPBIBI) possessing a conjugated pyridinone ring was shown to be effective for dispersing multiwalled carbon nanotubes (MWCNTs) in DMSO. The dispersions in which the SPBIBI to MWCNTs mass ratio was 4:1 demonstrated the highest MWCNTs concentrations, i.e., 1.5-2.0 mg mL⁻¹, and were found to be stable for more than six months at room temperature. Through casting of these dispersions, MWCNTs/SPBIBI composite membranes were successfully fabricated on substrates as proton exchange membranes for fuel cell applications and showed no signs of macroscopic aggregation. The properties of composite membranes were investigated, and it was found that the homogeneous dispersion of the MWCNTs in the SPBIBI matrix altered the morphology structures of the composite membranes, which lead to the formation of more regular and smaller cluster-like ion domains. As a result, and in comparison to a pristine SPBIBI membrane, the composite membranes displayed more significant proton conductivities, especially at low relative humidity, without sacrificing other excellent properties, such as thermal, dimensional and oxidative stabilities. For instance, the composite membranes with an MWCNTs content only of 0.5 wt% exhibited proton conductivities of 0.021 S cm⁻¹ at 50 RH% and 70 °C, a value almost fourfold as high as that of the pristine SPBIBI membranes under identical conditions (0.005 S cm⁻¹). The result was comparable to Nafion 117 (0.021 S cm⁻¹). The homogenous dispersion of the MWCNTs and the efficient enhancement the SPBIBI performance were attributed to the π-π interaction between the pyridinone ring and the sidewalls of the MWCNTs which changed the morphological structure of composite membranes as revealed by TEM. A combination of a low methanol crossover with excellent thermo-oxidative and water stabilities indicated that the SPBIBI composite membranes were good candidate materials for proton exchange membranes in fuel cell applications.     

Characterization of manganese tetraarylthiosubstituted phthalocyanines self assembled monolayers

Manganese tetraarylthiosubstituted phthalocyanines (complexes 1-5) have been deposited on Au electrode surfaces through the self assembled monolayer (SAM) technique. SAM characteristics reported in this work are: ion barrier factor (∼1); interfacial capacitance (303-539 μF cm⁻²) and surface coverage (1.06 × 10⁻¹⁰-2.80 × 10⁻¹⁰ mol cm⁻²). Atomic force microscopy was employed in characterizing a SAM. SAMs of complexes 1-5 were employed to detect l-cysteine (with limit of detection ranging from 2.83 × 10⁻⁷ to 3.14 × 10⁻⁷ M at potentials of 0.68-0.75 V vs. Ag|AgCl) and nitrite (limit of detection ranging from 1.78 × 10⁻⁷ to 3.02 × 10⁻⁷ M at potentials of 0.69-0.76 V vs. Ag|AgCl).     

油酸钠对酞菁铜颜料的分散作用

本文采用油酸钠对有机颜料酞菁铜进行改性,结果表明油酸钠可降低粒子Zeta电位,并有效调控有机颜料酞菁蓝的粒子尺寸及形貌.当水溶液中油酸钠浓度在0.040moL/L和0.500moL/L之间时,颜料粒子的平均粒径可达纳米级,Zeta电位可由-20mV减小到-60mV,体系的分散稳定性也得到明显提高.在油酸钠浓度为0.200moL/L时,颜料粒子粒径达到最小值(约66nm),而且总体比较均匀,基本呈现为球形;而油酸钠浓度较小(0.040 moL/L和0.064 moL/L)或较大(0.500moL/L)时,颜料粒子则主要以长棒状形式分散在体系中.