电子激发态CH（C^2Σ^＋）自由基的猝灭速率常数的测定

用２６６ｎｍ激光光解ＣＨＢｒ３分子产生ＣＨ（Ｃ）态自由基，通过测量ＣＨ（Ｃ＾２Σ＾＋→Ｘ＾２Ⅱ）的总荧光信号强度来测定室温下Ｏ２、Ｎ２、ｎ－Ｃ５Ｈ１２、ｎ－Ｃ６Ｈ１４和ｎ－Ｃ７Ｈ１６对ＣＨ（Ｃ２Σ＾＋，ｖ′＝０）的猝灭常数。结果表明，这些碰撞伴侣（Ｏ２和Ｎ２例外）对ＣＨ（Ｘ、Ａ、Ｂ和Ｃ）的反应或猝灭速率常数ｋ存在下列关系：ｋ（Ｘ）〉ｋ（Ｂ）〉ｋ（Ａ）≈ｋ（Ｃ），且烷烃分子对ＣＨ（Ｃ）态的猝灭速率常     

苊酮对二氰蒽的电子转移荧光猝灭研究──激基络合物的形成机理与动力学

研究了苊酮（ＡＮＯ）对９，１０－二氰蒽（ＤＣＡ）的荧光猝灭与激基络合物形成的动力学与机理。基于瞬态荧光双指数衰减，测定了激基络合物的光化学动力学和有关速度常数，论证荧光猝灭作用主要由ＡＮＯ／ＤＣＡ激基络合物的生成以及快速正向电子转移所致。     

氟喹诺酮类药物与牛血清白蛋白作用的研究

用荧光猝灭法研究了ＢＳＡ与ＮＦＬＸ及ＯＦＬＸ之间的相互作用，根据Ｆｏｒｓｔｅｒ的能量转移理论，确定了能量给体－受体间的距离，根据荧光猝灭谐绘制了猝灭曲线，确定其猝灭过程是静态猝灭，用Ｌｉｎｅｗｅａｖｅｒ－Ｂｕｒｋ双倒数曲线测定ＮＦＬＸ－ＢＳＡ和ＯＦＬＸ－ＢＳＡ络合物的离解常数，并详细研究了１０种阳离子，４种阴离子与药物对ＢＳＡ竞争结合的影响，推测了药物与蛋白的主要作用力。     

苊酮对二氰蒽的电子转移荧光猝灭研究——激基络合物的形成…

研究了苊酮（ＡＮＯ）对９，１０－二氰蒽（ＤＣＡ）的荧光猝灭与激基络合物形成的动力学与机理，基于瞬态荧光双指数衰减，测定了激基络合物的光化学动力学和有关速度常数，论证荧光猝灭作用主要由ＡＮＯ／ＤＣＡ激基络合物的生成以及快速正向电子转移所致。     

Triton X-100与牛血清白蛋白的相互作用

应用荧光光谱法研究了溶液体系中Ｔｒｉｔｏｎ Ｘ－１００（ＴＸ）与牛血清白蛋白（ＢＳＡ）之间的相互作用。实验表明ＴＸ对ＢＳＡ的荧光有较强的猝灭作用,二者形成不发荧光的复合物所产生的静态猝灭是引起荧光猝灭的主要原因。从荧光猝灭结果求得二者的结合常数,发现在不同ＴＸ浓度下,结合常数Ｋ及络合个数ｎ均不同;低于ＴＸ的ｃｍｃ,Ｋ＝４４０ｍｏｌ／Ｌ,ｎ＝０．９１,高于ｃｍｃ,Ｋ＝１０ｍｏｌ／Ｌ,ｎ＝０．４２,疏     

烯丙基硫脲与支持电解质阴离子在银电极上共吸附的拉曼光谱

用表面增强拉曼散射光谱（ＳＥＲＳ）和时间分辨ＳＥＲＳ光谱（ＴＲＳＥＲＳ）等技术首次研究了烯丙基硫脲（ＡＴＵ）在ＨＣｌＯ４、Ｈ２ＳＯ４和ＨＮＯ３介质中与无机阴离子在银电极上的电化学共吸附行为．提出ＡＴＵ很可能以Ｓ端与银电极表面形成化学吸附键，仲氨基相对伯氨基距离表面较近，整个分子偏向烯丙基一侧倾斜吸附在表面上．ＣｌＯ－４、ＳＯ２－４和ＮＯ－３等弱吸附无机阴离子均能被ＡＴＵ诱导共吸附在其质子化了的仲氨基上，这３种无机阴离子被ＡＴＵ诱导共吸附的强弱顺序是ＣｌＯ－４＞ＳＯ２－４＞ＮＯ－３．被诱导共吸附的无机阴离子对ＡＴＵ在电极表面的化学吸附起到稳定剂的作用，有利于ＡＴＵ在电极表面形成致密的吸附层     

CH（B~2Σ~－）和卤代甲烷、CS_2、O_2及Ar碰撞过程动力学研究

用四倍频ＹＡＧ激光（２６６ｎｍ）光解ＣＨＢｒ_３产生ＣＨ（Ｂ~２Σ~－）自由基，通过测量自发辐射ＣＨ（Ｂ→Ｘ）的时间分辨信号测得室温下ＣＨ（Ｂ）被卤代甲烷、ＣＳ_２、Ｏ_２及Ａｒ的猝灭速率常数（×１０~（－１０）ｃｍ~３·ｍｏｌｅｃ~（－１）·ｓ~（－１））分别为４．４±０．７（ＣＨ_２Ｃｌ_２）、５．２±０．４（ＣＨＣｌ_３）、５．０±０．７（ＣＣｌ_４）、８．２±０．３（ＣＨＢｒ_３）、７．９±０．７（ＣＳ_２）、０．１９±０．０２（Ｏ_２）及（１．１±０．１）×１０~（－２）（Ａｒ）．结果表明，除Ｏ_２外，其它猝灭剂对ＣＨ（Ｂ）的猝灭速率常数均大于对ＣＨ（Ａ）的。对卤代甲烷分子，猝灭速率常数显示了因Ｃｌ原子数增加而增加的趋势。     

由特殊相互作用导致的高分子间的络合：Ⅸ.聚（苯乙烯—co—4—乙烯基苯 …

采用结合物理老化技术的示差扫描量热法（ＤＳＣ）以及非辐射能量转移荧光光谱法（ＮＲＥＴ）研究了聚（苯乙烯－ｃｏ－４－乙烯基苯酚）（ＳＴＶＰｈ）与聚（苯乙烯－ｃｏ－４－乙烯基吡啶）＊（ＳＴＶＰｙ）共混体系在本体中的相容与络合行为,当ＳＴＶＰｈ中ＯＨ含量为３,６,９ｍｏｌ％时,可以分别与吡啶基含量是２５,５０,７５ｍｏｌ％的ＳＴＶＰｙ实现相容,ＯＨ含量更高时还可进一步形成络合,表面为远较Ｆｏｘ方程预示值     

吨染料与反胶束体系中CdS的光敏电子转移

用ＡＯＴ／异辛烷／水反胶束体系制备出了不同尺寸大小的纳米ＣｄＳ,并以曙红（ＥＯ）和孟加拉玫瑰红（ＲＢ）为探针分子,研究了它们与硫化镉微粒间的光致电荷转移相互作用,用光照实验和ＥＳＲ技术研究了这些染料向ＣｄＳ的导带注入电子的过程并讨论了作用机理     

O2^—在CdS表面复合氧化物层中的积聚及其对Pt／CdS（T）光催化活性的 …

Ｐｔ／ＣｄＳ经短时间高温空气处理后，ＣｄＳ表面覆盖有一层氧化物；在储存过程中，表面层中的Ｃｄ（ＯＨ）２进一步与空气中的ＣＯ２反应生成ＣｄＣＯ３，并有Ｏ２＾－在表面层中积累。Ｏ２＾－可起ｅＣＢ＾－和ｈＶＢ＾＋复合中心的作用，导致Ｐｔ／ＣｄＳ（Ｔ）光催化活性的降低。     

壳聚糖-CdS复合膜制备及其对吡啶的传感特性

利用壳聚糖（CS）易于成膜的特点，模拟生物矿化，在有机物调制下通过异相成核生长制备了CS/CdS纳米颗粒复合膜.研究了成膜条件对膜的水热稳定性和发光性能的影响，以及CS/CdS纳米颗粒复合膜对水体中吡啶的响应特性.扫描电镜分析表明CS/CdS纳米颗粒复合膜均匀性好， CdS以物理掺杂方式均匀分布于CS薄膜中， CdS颗粒尺寸在70 nm左右.但薄膜荧光光谱位置和形状表明实际发光的CdS簇集体直径小于20 nm.由此推测电镜观察到的CdS颗粒可能是由许多CdS小颗粒聚集而成，小颗粒之间因有机物的存在而相互隔离. CS/CdS纳米颗粒复合膜的荧光发射对水体中吡啶的存在十分敏感，微量吡啶的存在会引起薄膜荧光发射急剧增强.除铜和碘离子外，水体系中其他常见离子对薄膜荧光发射没有显著影响，预期CS/CdS纳米颗粒复合薄膜有可能发展成为一种重要的水体系吡啶测定专用传感薄膜材料.     

CdS/TiO2复合纳米粒子的光学性质

在Brij35/正己醇/环己烷/水构成的反相微乳体系中，分别合成了CdS、TiO2纳米粒子和TiO2包覆CdS（CdS/TiO2）的复合纳米粒子.测定了它们的紫外-可见吸收和荧光光谱.结果表明， CdS/TiO2复合纳米粒子在可见光区的吸收比相应的两组分的吸收之和更强.纳米CdS和纳米TiO2均有较强的荧光.而且在相同浓度时纳米TiO2的荧光比纳米CdS的荧光更强.但在CdS/TiO2复合纳米粒子中，TiO2的荧光被淬灭，而CdS的荧光稍有降低.     

季铵盐光产碱剂的光物理与光化学性能

季铵盐光产碱剂的光物理与光化学性能;季铵盐;四苯硼盐;光产碱剂;光物理;光化学     

Synthesis,characterization and stability of multicore-shell CdS-SiO<Subscript>2</Subscript> nanoparticles

Multicore-shell CdS-Si0₂ nanoparticles were synthesized in AOT/heptane/H₂O reverse micelles at room temperature. CdS-SiO₂ nanoparticles were characterized by UV-vis spectroscopy, TEM, and SEM methods. The results show that multicore-shell composites were formed. Fluorescence properties of composites were also investigated; the data imply that fluorescence properties of the silica-coated CdS nanoparticles were significantly improved when compared to those of the non-coated CdS nanoparticles. The stability of multicore-shell CdS-SiO₂ nanoparticles upon the UV irradiation was higher than that of non-coated CdS nanoparticles.     

Effect of the Spherical Silica Surface on the Photoluminescence of the Loaded CdS Nanoparticles

CdS nanoparticles were formed on the surface of silica microspheres by the improved layer‐by‐layer self‐assembled technique. High‐resolution electron microscope (HRTEM) image and energy dispersive x‐ray analysis (EDX) confirmed formation of a quasi‐continuous CdS nanoparticles film on the silica microspheres. The results of UV‐vis and fluorescence spectra display that the spherical silica surface has a great effect on the photoluminescence of the loaded CdS nanoparticles. In contrast to the CdS nanoparticles powder, the composite can exhibit the emission ascribed to the band gap transition when the CdS nanoparticles film is relatively thick. This phenomenon is probably due to an enhancement of the crystallinity of CdS nanoparticles induced by the silica spheres.     

水溶性CdSe/CdS量子点的合成及其与牛血清蛋白的共轭作用

用巯基乙酸(TGA)作为稳定剂，合成了水溶性的CdSe和核壳结构的CdSe/CdS半导体量子点。吸收光谱和荧光光谱研究表明，核壳结构的CdSe/CdS半导体量子点比单一的CdSe量子点具有更优异的发光特性。用TEM、电子衍射(ED)和XPS分别表征了CdSe和CdSe/CdS纳米微粒的结构、形貌及分散性。红外光谱和核磁共振谱证实了巯基乙酸分子中的硫原子和氧原子与纳米微粒表面的金属离子发生了配位作用。在pH值为7.4的条件下，将合成的CdSe和CdSe/CdS量子点直接与牛血清白蛋白(BSA)相互作用。实验发现，两种量子点均对BSA的荧光产生较强的静态猝灭作用；而BSA对两种量子点的荧光则具有显著的荧光增敏作用，存在BSA时CdSe/CdS量子点的荧光增强是不存在BSA时体系荧光强度的3倍。     

利用鲑鱼精DNA为模板构建CdS纳米线

以鲑鱼精DNA为模板合成了CdS纳米粒子，透射电子显微观察表明所生成的CdS是一种直径约为3nm的线形结构，紫外-可见吸收光谱，拉曼光谱和X-射线光电子能谱结果表明，CdS纳米粒子的生长点为DNA中的磷酸根，并且在这一体系中可能存在从CdS到DNA中碱基的电子转移。     

Fluorescence and picosecond laser photolysis studies on the deactivation processes of excited hydrogen bonding systems

The fluorescence quenching reaction of 2-naphthylamine and 1-pyrenol due to hydrogen bonding interaction with pyndine has been investigated Absorption spectra due to the state formed by charge transfer from excited naphthylamine to hydrogen bonded pyridine have been observed by means of picosecond laser photolysis.     

Preparation of novel silica-cadmium sulfide composite nanoparticles having adjustable void space by size-selective photoetching

The size-selective photoetching technique was used to control the size of a CdS nanoparticle inside a silica shell. With monochromatic light irradiation, the diffuse reflectance spectra of silica-coated CdS nanoparticles were blue-shifted, and the size of the resulting CdS nanoparticles incorporated in the silica shells was adjustable by varying the wavelength of irradiated light. TEM observation revealed that the original CdS nanoparticle seemed to be in close contact with the amorphous silica shell to leave almost no clearance, while the monochromatic light irradiation caused the decrease in the size of CdS particles, resulting in the formation of a void space between the photoetched CdS core particle and the silica shell. The average void spaces available in the shells were calculated to be ca. 1.4 and 2.4 nm with the irradiation at 514 and 458 nm, respectively. These results indicated that the size-selective photoetching technique enables the regulation of void space formed in the core-shell structure by choosing the wavelength of irradiation light.     

Structure of cadmium sulfide nanoparticle micelle in aqueous solutions

The structure of cadmium sulfide (CdS) micelle in stable aqueous solution of ethylenediaminetetraacetic acid was determined by dynamic light scattering, small-angle X-ray scattering and neutron scattering. The micelle aggregate is a single CdS nanoparticle with an average size of about 3 nm, the nanoparticle organic shell and the solvation shell are about 1 nm and 5 nm thick, respectively. These parameters were confirmed by the scanning semi-contact atomic force microscopy and powder X-ray diffraction studies of dry micelle cores isolated by high-speed centrifugation. The CdS micelle was correctly described by a simple double-shell model and was found to possess the structure corresponding to CdS quantum dots.