(7-甲氧基-4-亚甲基)香豆素基-单氮杂18-冠-6的合成及其离子识别功能(Ⅰ)——合成及光谱性质

合成、鉴定了题示光敏离子载体（ＭＭＣ－ＭＡＣ（Ｏ５ ））。基于不同ｐＨ值水溶液中吸收和荧光光谱的变化, 计算得该试剂基态和激发态分子的酸性常数（ｐＫａ ＝ ８．８４, ｐＫａ ＝ ５．１１）。基于在不同溶剂中荧光光谱的变化, 由Ｓｏｌｖａｃｈｒｏｍ ｉｃ法, 借助Ａｌｃｈｅｍ ｙ ２０００ 量化计算软件, 估算得该分子的基态和激发态偶极矩, 分别为３．１１Ｄ和８．１３Ｄ。同时发现, ＭＭＣ－ＭＡＣ（Ｏ５ ）水溶液除氧后其荧光强度奇迹般地提高近２０ 倍, 并伴随一定强度的延迟荧光发射。其荧光或延迟荧光强度与浓度在一定范围内呈良好线性关系。检测限分别为２×１０－ ９和１．３×１０－ ８ ｍ ｏｌ·Ｌ－ １ 。     

环糊精—表面活性剂包结作用的研究

应用表面张力方法研究了β－环糊精（β－ＣＤ）对十二烷基苯磺酸钠（ＳＤＢＳ）的包结作用，研究了不同温度下β－ＣＤ对ＳＤＢＳ表面活性的影响以及脂肪醇加入β－ＣＤ包结ＳＤＢＳ表面活性的影响，求得了不同温度下β－ＣＤ包结ＳＤＢＳ的平衡常数Ｋ，并用＾１ＨＮＭＲ波谱探讨了包结物β－ＣＤ／ＳＤＢＳ的分子结构模型。     

四磺化酞菁钴在水溶液中二聚作用力的研究

采用发光光度法研究了四磺化酞菁钴（ＣｏＴＳＰｃ）在水、醇－水（ＭｅＯＨ、ＥｔＯＨ、ＰｒＯＨ）、胶束、微乳液、乙二胺、氨水、氰化钾的水溶液中的二聚现象，测定了ＣｏＴＳＰｃ的二聚常数ＫＤｏＴＳＰｃ与ｅｎ、ＮＨ３、ＣＮ形成配合物的稳定常数Ｋ和生成反应速率常数ｋ。     

碘化银胶体上四苯基卟啉金属配合物的表面增强拉曼光谱研究

研究了四苯基卟啉金属配合物（ＭＴＰＰ,Ｍ＝Ａｇ,Ｍｇ,Ｃｕ,Ｐｄ）在Ａｇｌ胶体上的表面增强拉我谱（ＳＥＲＳ）。结果显示ＭｇＴＰＰ与基底发生金属交换生成ＡｇＴＰＰ,而在ＰｄＴＰＰ和ＣｕＴＰＰ上则未发现金属交换,除卟啉环的振动外,一些苯环振动带也被显著增强,在１４００～１６００ｃｍ＾－１范围,ＰｄＴＰＰ和ＣｕＴＰＰ的ＳＥＲＳ与ＡｇＴＰＰ有很大差别,可能反映了吸附分子在次甲基桥碳原子Ｃｍ附近立体构型的差     

过渡金属Mn(Ⅲ),Fe(Ⅲ),Rh(Ⅲ)和Pd(Ⅱ)卟啉配合物的共振拉曼光谱研究

讨论了金属离子Ｍｎ（Ⅲ），Ｆｅ（Ⅲ），Ｒｈ（Ⅲ）和Ｐｄ（Ⅱ）原卟啉Ⅸ－二甲酯（ＰＰ）和四苯基卟啉（ＴＰＰ）配合物及Ｐｄ（Ⅱ）间氯四苯基卟啉（ＴＰＰｍ－ｃｌ）配合物的共振拉曼光谱。利用金属离子外层ｄ电子与卟啉环的作用，解释了配合物结构灵敏带的变化规律，同时讨论了不同卟啉及卟啉环上取代基团对结构灵敏带的影响。     

非离子水溶性膦铑配合物催化剂的XPS表征

用Ｘ射线光电子能谱（ＸＰＳ）的分析方法，对非离子水溶性膦铑配合物ＲｈＣｌ３／ＴＰＰＰ的组成，结构进行表征，并且用曲线拟合分峰技术对配体ＴＰＰＰ，配合物ＲｈＣｌ３／ＴＰＰＰ催化剂中各元素的峰进行数据处理，结果表明配体ＴＰＰＰ与配合物ＲｈＣｌ３／ＴＰＰＰ比较，配合物中存在Ｒｈ－ＣＯ配位和Ｒｈ－Ｐ配位，通过ＸＰＳ分析测试结果推断，原位合成的ＲｈＣｌ３／ＴＰＰＰ配合物催化剂其结构表示为ＣｌＲｈ（ＣＯ）ｎ（     

5-(2-羧基苯基)-10,15,20-三苯基卟啉-氨基酸酯之间的氢键-UV-Vis和~1H-NMR研究

本文通过分析５－（２－羧基苯基）－１０,１５,２０－三苯基卟啉（ｏ－ＴＰＰＣＯ２Ｈ）和苯丙氨酸乙酯的紫外－可见光谱（ＵＶ－Ｖｉｓ）滴定曲线以及１ Ｈ－ＮＭＲ数据, 证实了ｏ－ＴＰＰＣＯ２Ｈ 中的吡咯氮上的氢和氨基酸酯的羰基氧之间形成的氢键     

尾式卟啉金属配合物轴向配位性质光谱研究

用紫外可见吸收光谱研究了二种新尾式卟啉：５－邻（４－（３－吡啶氧基）丁氧基）苯基１０，１５，２０三苯在卟啉（Ｏ－ＰｙＴｐｐ）和５－邻（４－（１－咪唑基）丁氧基）苯基１０，１５，２０三苯基卟啉（Ｏ－ＩｍＴＰＰ）的铁（Ⅲ）和锰（Ⅲ）配合物：Ｏ－ＰｙＴＰＰＦｅ（Ⅲ），Ｃｌ，Ｏ－ＩｍＴＰＰＦｅ（Ⅲ），Ｃｌ－ＰｙＴＰＰＭｎ（Ⅲ），Ｃｌ，Ｏ－ＩｍＴＰＰＭｎ（Ⅲ）Ｃｌ与含氮配体的轴向配位性质，结果表明，对于铁（     

CO分子d3Δ-a3Π三重带的塞曼调制磁旋转光谱的研究

采用塞曼调制磁旋转光谱技术（ＺｅｅｍａｎＭｏｄｕｌａｔｉｏｎｍａｇｎｅｔｉｃＲｏｔａｔｉｏｎＳｐｅｃｔｒｏｓｃｏｐｙ以下简称ＺＭ－ＭＲＳ）研究ＣＯ分子（ｄ３Δ－ａ３Π）的（５－０）振动带高灵敏度吸收谱。标识出了十二个子带，观察到了下态ａ３Π的Λ双分裂，拟合出了上下态分子常数。     

CH^35Cl3和CH^35Cl2^37Cl分子V=3的傅里叶变换光谱研究

采用傅里叶变换光谱技术（ＦＴＳ）记录了ＣＨ＾３５Ｃｌ３和它的同位素分子ＣＨ＾３５Ｃｌ２＾３７Ｃｌ的Ｖ＝３的高分辨光谱，由于０．０２ｍ＾－１分经不足以分辨Ｋ结构，我们将所观察到的谱线近似归属为Ｋ＝０的转动能级，归属了ＣＨ＾３５Ｃｌ３岔子４〈Ｊ〈７３，ＣＨ＾３５Ｃｌ＾３７Ｃｌ分子６〈Ｊ〈５３的转动级。最后采用最小二乘法拟合，得到了关于Ｊ的转动常数和振动带心。     

非离子型微乳液对导数分光光度法测定微量铁的增敏作用

与胶束介质比较,非离子型Ｏ／Ｗ微乳液Ｔｒｉｔｏｎ Ｘ－１００／ｎ－Ｃ５Ｈ１１ＯＨ／ｎ－Ｃ９Ｈ２０／Ｈ２Ｏ对以磺基水杨酸为显色剂三阶导数分光光度法测定微量铁有更好的增敏作用。在ｐＨ４－６的六次甲基四胺－盐酸介质中,铁－磺基水杨酸配合物的最大吸收工λｍａｘ为２４９ｎｍ,微乳液介质中的测定灵敏度比胶束介质中提高近一倍。     

Proton relaxation enhancement by manganese(III)TPPS4 in a model tumor system

Managanese(III)tetraphenylporphine sulfonate [Mn(III)TPPS4] has been investigated as a tumor specific paramagnetic contrast agent for magnetic resonance imaging (MRI) of L1210 solid tumors in mice. Mn(III)TPPS4 was found to clear rapidly from the blood and concentrate in the kidneys, tumor and liver. Although relatively high ratios of tumor to normal tissues could be obtained (e.g., greater than 90 for tumor/muscle), the kidneys were found to have the highest concentration of the metalloporphyrin at all doses and time periods tested. A significant decrease in the longitudinal relaxation time was measured for excised tissues (kidney, tumor, liver, muscle) from mice that were treated with Mn(III)TPPS4. A linear correlation was observed between the longitudinal relaxation rate determined for L1210 tumor and the corresponding concentration of Mn(III)TPPS4 found at various injected doses and time intervals between the injection and analysis. A small animal radiofrequency receiver coil designed for use with a 0.15-T clinical imager was employed to evaluate the ability of Mn(III)TPPS4 to selectively increase the signal intensity of the implanted L1210 tumor. The images show a conspicuous enhancement in the contrast between the tumor and adjacent tissue upon treatment with this agent. The results indicate that Mn(III)TPPS4 is a useful prototype paramagnetic metalloporphyrin MRI contrast agent with a significant affinity for the L1210 tumor.     

Total Internal Reflection Fluorescence Spectroscopy for Investigating the Adsorption of a Porphyrin at the Glass/Water Interface in the Presence of a Cationic Surfactant Below the Critical Micelle Concentration

Total internal reflection fluorescence (TIRF) spectroscopy was used to investigate the adsorption behavior of meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS) at the glass/water interface in the presence of a cationic surfactant (cetyltrimethylammonium bromide, CTAB) far below the critical micelle concentration. The adsorption model of TPPS at the glass/water interface in the presence of low concentration of CTAB was proposed, which was different from the adsorption of TPPS in the presence of micelles of CTAB at the glass/water interface. TPPS and CTAB did not form stable complex at the interface in dilute system. The interfacial species of TPPS were analyzed by comparing the spectra of TPPS at the glass/water interface and in the aqueous phase. The influences of the TPPS concentration, the CTAB concentration, and the pH values on the interfacial fluorescence spectra and intensities were studied. It was demonstrated that electrostatic interaction and hydrophobicity performed an important role on the adsorption of TPPS in the presence of CTAB. The different effects of TPPS concentration on the adsorption behaviour of TPPS at different pH were observed for the first time. It was found that the adsorption isotherms of TPPS at glass/water interface could fit Freundlich equation at pH 7.1.     

The interaction of iron and metal‐free meso‐tetra (4‐sulfonatophenyl) porphines with CVD graphene: a comparative Raman spectroscopy study

In this work, a non‐covalent interaction of iron and metal‐free meso‐tetra (4‐sulfonatophenyl) porphines (FeTPPS and TPPS, respectively) with high‐quality single‐layer graphene is studied by Raman spectroscopy. Such a kind of graphene functionalization is promising for a development of novel optoelectronic devices and sensors. Our results show that the central metal atom of porphyrin macrocycle, iron particularly, plays an important role in the integrity of FeTPPS on graphene surface; however, the predicted Raman enhancement is not significant. The interaction of metal‐free TPPS with graphene leads to the deprotonation of TPPS molecules and higher Raman enhancement values. Moreover, initially deprotonated TPPS solutions after the adsorption onto the graphene surface demonstrate the appearance of new Raman bands and significantly enhanced Raman signals. We propose that a strong interaction between deprotonated TPPS and graphene is realized through pyrrole and desulfonated phenyl rings of closely located planar TPPS molecules on the graphene surface. The results show that both the protonation of porphyrin macrocycle and the existence of central metal atom are crucial for a formation of nanocomposites with defined electronic properties. Copyright © 2014 John Wiley & Sons, Ltd.     

从单一多位交换~(119)Sn二维交换谱求取SnCl_6~(2-)水解体系的动态交换速率常数

本文对如何从单一二维交换谱提取速率常数进行了理论分析,提出了一种近似处理方法,即把较短混合时间τ_m内在二维平面上磁化强度传递看成是单向进行的,进而导出了二维交换谱中所有峰强随τ_m变化的表达式。所得结果与Ernst的精确结果在一级近似下完全一致,在二级近似下略有不同,但将难以求解的问题转化成简单的代数方程、用这一方法对新近获得的SnCl_4·5H_2O在水溶液中的~(119)Sn二维交换谱进行了处理,得到与实验相吻合的结果,并求得了SnCI_6~(2-)水解体系的动态交换速率常数。     

Ultrasonic studies of aluminium-substituted Bi(Pb)-2223 superconductors

The compositional dependence of elastic properties of Al³⁺-substituted Bi(Pb)-2223 superconducting system with the general formula Bi_1.7−x Al_xPb_0.3Sr₂Ca₂Cu₃ O_y (x = 0.0, 0.1, 0.2 and 0.3) have been studied by means of ultrasonic pulse transmission (UPT) technique at 1 MHz (300 K). The elastic moduli of the specimens are computed and corrected to zero porosity. The observed variation of elastic constants with aluminium substitution has been explained on the basis of the strength of interatomic bonding. The applicability of heterogeneous metal mixture rule for estimating elastic constants and transition temperature has been tested.     

卤代甲烷系列谱学性质与结构关系的研究

本文借助最大重迭杂化轨道理论研究了卤代甲烷系列分子的NMR自旋-自旋偶合常数和核四极偶合常数与结构的关系。较明确地反映了化学键性质和取代基对分子谱学性质的影响。     

Spectroscopic investigation on the effect of pairing anions in imidazolium-based ionic liquids on the J-aggregation of meso-tetrakis-(4-sulfonatophenyl)porphyrin in aqueous solution

The effect of pairing anions in imidazolium-based ionic liquids (ILs) on the J-aggregation of meso-tetrakis-(4-sulfonatophenyl)porphyrin (TPPS) is investigated in aqueous solutions by the spectroscopic methods. The ILs used herein possess similar cations but different pairing anions, tetrafluoroborate (BF₄⁻) and p-toluenesulfonate (TS⁻). The results from absorption and fluorescence spectra indicate that the J-aggregation is mainly regulated by anionic species. The J-aggregation of TPPS is initially promoted with the increase of 1-butyl-3-methylimidazolium tetrafluoroborate/1-ethyl-3-methylimidazolium tetrafluoroborate (BMIMBF₄/EMIMBF₄) until 0.10/0.40 mol/L and subsequently weakened slightly with further increase of BMIMBF₄/EMIMBF₄ concentration. However, the J-aggregation of TPPS hardly occurs in the tested concentration range of 1-butyl-3-methylimidazolium-tosylate/1-ethyl-3-methylimidazolium-tosylate (BMIMTS/EMIMTS). Furthermore, obvious redshifts in both absorption and fluorescence spectra of TPPS are observed with progressive addition of BMIMTS/EMIMTS. TPPS induces proton chemical shifts of BMIMBF₄/EMIMBF₄ and BMIMTS/EMIMTS to shift downfield and upfield, respectively. So it can be concluded that ILs with simple pairing anion BF₄⁻ promote the J-aggregation of TPPS by charge equilibrium, while ILs with pairing anion TS⁻ inhibit the J-aggregation of TPPS by the π-π and hydrophobic interaction.     

FMR and SMFMR investigation of epitaxial Fe/GaAs(0 0 1) thin films with Si and Ge overlayer

The magnetic anisotropy and magnetoelastic properties of epitaxial iron films prepared by DC magnetron sputtering on single crystal GaAs(0 0 1) substrate and covered with a protective Si or Ge layer have been investigated by means of the ferromagnetic resonance and strain-modulated ferromagnetic resonance. It has been shown that the uniaxial and cubic anisotropy constants as well as two magnetoelastic constants strongly depend on the thickness of the film. The surface components of the cubic anisotropy and magnetoelastic constants have been determined.     

Spectrophotometric Study of the Protonation Processes of Some: N-(4-X-Phenylaminomethyl)-phthalimide Derivatives

The protonation of N-(4-X-phenylaminomethyl)-phthalimide derivatives and phthalimide in aqueous acidic (H₂SO₄) media was investigated, using the spectrophotometric method. These phthalimide derivatives have three protonation processes. The first protonation process occurs in pH range and belongs to the protonation of amino-group. The second and the third protonation process (occur in concentrated sulfuric acid solutions) are overlapping processes. They were separated by the modified method of separation (Garcia et al.). The protonation constants were calculated by Hammett and Cox-Yates method. The effect of chemical structure on ionisation constants is discussed.