红外光谱在二茂铁类化合物中的应用

红外光谱是进行有机物结构分析的一类重要手段,在鉴定二茂铁及其衍生物的过程中起到了不可替代的作用。     

二茂铁及其衍生物的应用研究进展

综述了二茂铁及其衍生物在燃料添加剂、催化剂、医学、电化学、液晶材料、感光材料、以及二茂铁磁体等方面的应用和最新研究进展。     

二茂铁及其衍生物开发利用前景广阔

二茂铁又叫双环戊二烯基铁,是由两个环戊二烯阴离子(C_2H_5~-)和一个二价铁离子(Fe~(2 ))构成的,具有芳香族性的有机过渡金属化合物。外观为橙黄色的针状结晶,具有类似樟脑的气味,熔点173～174℃,沸点249℃,100℃以上能升华;不溶于水,溶于甲醇、乙醇、乙醚、石油醚、二氯甲烷、苯等有机溶剂。其分子呈极性,具有高度热稳定性、化学稳定性和耐辐射性。溶于浓硫酸中,在沸腾的烧碱溶液和盐酸中不溶解,不分解;容易     

二茂铁及其衍生物的电化学研究进展

介绍了二茂铁及其衍生物的基本电化学行为,重点对二茂铁及其衍生物在电子供体和受体间的电子转移、电催化、电分析和分子识别等方面的应用研究现状作了归纳和评述。提出了今后研究工作的方向。     

二茂铁及其衍生物的合成与应用进展

近年来所取得的进步表明二茂铁及其衍生物在液晶等其他工业方面具有重要的应用前景。本文对二茂铁及其衍生物的制备、特点及应用研究现状作了归纳和评述。     

二茂铁衍生物的研究进展及其应用

二茂铁及其衍生物是重要的一类金属有机化合物.本文重点对它们在燃料添加剂、催化、电化学、医药学、液晶材料、光电功能材料等方面的应用和最新研究进展作了归纳和综合评述.     

二茂铁及其衍生物的应用

综述了二茂铁及其衍生物在添加剂、燃速催化剂、医学、液晶材料、感光材料以及二茂铁有机磁体等方面的应用和最新研究进展。     

苯甲酸衍生物红外光谱的研究

对苯甲酸衍生物的红外光谱进行了研究,结果表明苯甲酸的羰基峰随着苯环取代基的位置、取代基的电负性的变化而发生规律性的变化.     

Preparation of Triazole-furnished Ferrocene Derivatives and their Polymer Complexes of Silver(I)

Condensation reactions of feroccenemethanol and of 1,1′-feroccenedimethanol with benzotriazole and triazole produce the ferrocene derivatives with one or two N-azole-containing substituents bonded to the cyclopentadienyl ligands. The bifunctional ferrocene derivatives, 1,1′-bis[(1,2,3-benzotriazol-1-yl)methyl]ferrocene and 1,1′-bis(1,2,4-triazoyl)ferrocene, reacts with [Ag(MeCN)₄]PF₆ to cause separation of the macromolecular complexes from the solution. The former ferrocene derivative with benzotriazole groups yields the complex of Ag(I) with Ag:ligand = 2:3. The Ag center is bonded to three triazole groups, forming a trigonal structure. Crystals of the complexes contain the ladder-shaped sheets formed by Ag(I) and the ligand, and these sheets are aligned in a staggered fashion. The latter ligand with 1,2,4-triazole groups and Ag(I) yield the 1:1 complex. Counter anions and MeCN molecules are contained within holes formed by the Ag(I) centers bonded with a metal–metal bond and the bifunctional ligands. NMR and UV measurement of the MeCN solution of these macromolecular complexes revealed dissociation of the ligand and degradation of the complexes in solution. This paper is dedicated to Professor Takakazu Yamamoto in honor of his pioneering research efforts and accomplishments in the fields of organometallics and π-conjugated polymers.     

反红外探测药剂发展综述

综述了国内外在反红外探测药剂方面的研究概况，简单介绍了反红外探测药剂的发展真挚和应用前景。     

Novel Organometallic Aromatic Azo Polyesters Based on Ferrocene

Some ferrocene containing aromatic azo polyesters were prepared by condensing 1,1-ferrocenedicarbonyl chloride with different azo groups containing aromatic diols, which were synthesized by diazotization coupling reaction from aromatic diamines. The polymeric products were separated as two portions on the basis of their solubility and subsequently characterized by their elemental analysis and FTIR spectral studies. Thermal properties of the products were measured by differential scanning calorimetry and thermogravimetry and the activation energies of pyrolysis were calculated using Horowitz and Metzger's method. The molecular weights of the soluble portions were determined by gel permeation chromatography (GPC) and these portions were also characterized by their inherent viscosities and UV-Vis spectroscopic studies.     

Spectroscopic Studies of d-Pilocarpine and Some Quaternary Derivatives

Detailed spectroscopic studies have been carried out on the alkaloid d-pilocarpine as free base and after quaternization. Characteristic changes in the NMR, IR and UV spectroscopic properties have been established following quaternization. The respective mass spectra have been analysed, and characteristic fragmentation patterns are described. The amidic nature of d-pilocarpinehydroxamic acid has been confirmed by IR, NMR and mass spectrometric measurement.     

二茂铁的电合成及反应条件研究

以高纯度的环戊二烯(CPD)为原料,以金属铁为阳极,卤化盐作为导电盐,有机溶剂作为介质,在采用氮气保护的情况下电解合成二茂铁。对电解合成二茂铁的反应条件进行了优化研究,结果表明:电解液比例为二甲基亚砜(mL)∶环戊二烯(mL)∶溴化钠(moL)=10∶1∶0.008。实验分别以铁板和镍板作为工作电极和对电极,极板间距为1~1.5 cm,电解电压为3.2~5.2 V(vs.SCE),反应时间为5 h,反应温度为40℃,强烈搅拌条件下电解合成效率较高。     

红外光谱法测定生物质燃料中全硫的研究

建立红外光谱法测定生物质燃料中全硫含量的方法,采用标准样品校正仪器,拟合校正曲线,研究了该方法的准确度和精密度。结果表明,全硫含量在0%~4.45%范围内,测量值和实际值硫含量线性关系良好,用标准加入法进行回收率实验对方法的准确度进行考察,相对标准偏差为0.76%~1.52%,加标回收率为99.44%~99.89%。与其他检测方法比较,该方法操作简单,检测时间短,自动化程度高。     

Infrared spectroscopy of carbon monoxide adsorbed on Pt/L zeolite

A series of 0.6 wt% Pt/MBaL zeolites, where M is Li, Na, K, Rb or Cs, were prepared and characterized by transmission electron microscopy, chemisorption, and infrared spectroscopy of adsorbed carbon monoxide. Greater than 90% of the exposed platinum in the samples is associated with small clusters, less than 7 Å across, inside the zeolite channels. The remaining fraction of exposed platinum is on 100–500 Å crystallites outside the channels. Adsorption of carbon monoxide on the platinum at 25 °C produces a broad infrared band whose maximum shifts from 2065 to 2025 cm^–1 as the alkali cations in the zeolite are changed from Li to Cs. This shift is indicative of electron transfer between the cations and the platinum clusters. Heating the Pt/L catalysts to 225 °C produces new infrared bands at 2020–2015, 1975, and 1935–1920 cm^–1. The appearance of these low-frequency bands strongly suggests that the CO-covered platinum clusters change their structure during heating. We propose that the new structure is one in which the carbon monoxide molecules insert into spaces between the framework atoms of the L zeolite.     

Infrared Spectroscopy and Multivariate Calibration for Quantification of Soybean Oil as Adulterant in Biodiesel Fuels

This work quantifies the adulteration of ethyl and methyl soybean biodiesels/diesel (B5) blended with soybean oil using mid‐infrared spectroscopy associated with multivariate calibration. The models constructed by the method of partial least squares (PLS) presented low values of root‐mean‐square error of prediction 0.22 % (w/w) and 0.26 % (w/w), respectively, for models containing ethyl and methyl soybean biodiesel. Along with the parameters of error, accuracy was evaluated by the use of an elliptical joint confidence region (EJCR). The EJCR for the both PLS models showed there was no significant difference between the prepared concentration values and PLS predicted concentration values, and that there was no evidence of bias within the 95 % confidence level. The PLS models showed excellent correlation in the prediction set (R = 0.999) and did not present systematic errors according to the ASTM E1655 standard. Therefore, the models presented excellent performance in quantifying soybean oil as an adulterant in B5 blends, in concentrations within the range 1.00–30.00 % (w/w). The proposed methodology showed itself to be efficient for quality control of B5 contaminated with vegetable oil.