甲基丙烯酸(3-三甲氧基硅)丙酯-马来酸二丁基锡共聚物/二氧化硅杂化材料的制备

甲基丙烯酸（３ 三甲氧基硅）丙酯 马来酸二丁基锡共聚物／二氧化硅杂化材料的制备周文董建华丘坤元（北京大学化学与分子工程学院高分子科学与工程系，１００８７１北京）ＷｅｉＹｅｎ（危岩）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｄｒｅｘｅｌ...     

新型偶氮二阶非线性光学成膜材料

新型偶氮二阶非线性光学成膜材料高丽华，黄春辉，李辉，王科志（北京大学稀土材料化学及应用国家重点实验室，北京，１００８７１）黎甜楷，徐京梅赵新生，夏晓华（中国科学院感光化学研究所，北京）（北京大学化学与分子工程学院，北京）关键词偶氮化合物，ＬＢ膜，二次...     

从第二届富勒烯科学与技术多学科国际会议看其发展

从第二届富勒烯科学与技术多学科国际会议看其发展韩万书（国家自然科学基金委员会化学科学部北京１０００８３）第二届国际富勒烯科学与技术多学科会议于１９９６年７月７日～１０日在英国牛津大学召开。与会代表１７０人，分别来自美国、英国、法国、德国、日本、中国等...     

第4届中国多肽国际学术会议在成都召开

第４届中国多肽国际学术会议在成都召开叶蕴华徐筱杰（北京大学化学与分子工程学院北京１００８７１）经国家教委批准，由北京大学主办，四川大学协办的第４届中国多肽国际学术会议（Ｉｎ－ｔｅｒｎａｔｉｏｎａｌＣｈｉｎｅｓｅＰｅｐｔｉｄｅＳｙｍｐｏｓｉｕｍ１９９６...     

D－葡萄糖、D－果糖与Ca~（2＋）、Mg~（2＋）、Cu~（2＋）、Zn~（2＋）、Cd~（2＋）反应的热力学函数

Ｄ－葡萄糖、Ｄ－果糖与Ｃａ~（２＋）、Ｍｇ~（２＋）、Ｃｕ~（２＋）、Ｚｎ~（２＋）、Ｃｄ~（２＋）反应的热力学函数张保林（南京大学配位化学研究所，配位化学国家重点实验室，南京，２１０００８）王文清，陶祖贻（北京大学技术物理系，北京）（兰州大学现代物理系?..     

重氮树脂与十二烷基硫酸钠相互作用研究

重氮树脂与十二烷基硫酸钠相互作用研究罗杨磊曹维孝（北京大学化学与分子工程学院北京１００８７１）关键词重氮树脂，十二烷基硫酸钠，负性ＰＳ版随着化学与生命科学领域的发展，大分子与小分子在溶液的相互作用越来越受到关注．表面活性剂因其具有自组装能力，...     

手性多取代吡咯的合成和抗炎活性

手性多取代吡咯的合成和抗炎活性王占岳（温州医学院化学教研室温州３２５００３）花文廷（北京大学化学与分子工程学院北京１００８７１）程桂芳（中国医学科学院药物研究所北京１０００５０）关键词手性多取代吡咯抗炎活性合成中图分类号Ｏ６２６．１３许多天然和合成的...     

用于富勒烯分离的高效液相色谱固定相

用于富勒烯分离的高效液相色谱固定相陈德朴，郁鉴源，廖沐真，黄贺生，刘凤英，刘梦林（清华大学化学系，北京，１０００８４）（清华大学现代应用物理系）关键词Ｃ_（６０）、Ｃ_（７０）分离，固定相，高效液相色谱目前有关富勒烯的研究是国际上一个非常活跃的研究领域...     

N，N＇－二（乙酰芳香环）－穴醚［2，2］的合成

Ｎ，Ｎ＇－二（乙酰芳香环）－穴醚［２，２］的合成余江，许振华，徐光宪（北京大学化学与分子工程学院，稀土材料化学及应用国家重点实验室，北京，１００８７１）关键词大环，穴醚［２，２］，ＨＴＴＡ穴醚（Ｃｒｙｐｔａｎｄ）是含有Ｏ及Ｎ和Ｓ等杂原子的多聚大环化合...     

1，3，6，11，13，18，28，31－八溴富勒烯－C_（60）LB膜特性及导电性的研究

１，３，６，１１，１３，１８，２８，３１－八溴富勒烯－Ｃ_（６０）ＬＢ膜特性及导电性的研究叶玉汉，肖玉方（宁波师范学院化学系，宁波，３１５０２０）（中国科学院兰州化学物理研究所）关键词１，３，６，１１，１３，１８，２８，３１－八溴富勒烯，Ｃ_（６０）Ｌ...     

C60氢胺化反应及其在制备含C60功能材料中的应用

C60与胺类化合物的反应是C60衍生化的重要方法。 本文介绍了C60氢胺化反应的一般规律和特点,对C60氢胺化反应在制备含C60高分子功能材料、含C60自组装单分子膜(SAM)、含C60有机/无机纳米材料和C60生物功能材料等方面应用的研究进展作了综述。     

C60掺杂物超导性EHMO晶体轨道研究

本文对晶态C60, K3C60, K6C60, Rb3C60, Rb6C60, RbCs2C60, Rb2CsC60,KRb2C60, K2RbC60, K2CsC60, Na2CsC60, Li2CsC60, Na2RbC60, Na2KC60进行了EHMO三维晶体轨道的能带结构计算。计算结果除了得到能带结构外, 还得到了这类掺杂物的总态密度, 原子与轨道净电荷, 晶体轨道矢量, 单胞内外原子与轨道投影态密度等。利用上述结果不仅可以从理论上说明A3C60的超导性以及C60和A6C60的绝缘性; 而且还得到ln(1/Tc)和-1/NEf之间一种近似的线性关系, 这个结论与BCS理论的预测非常吻合。     

Photoinduced charge separation and charge recombination in [60]fullerene-ethylcarbazole and [60]fullerene-triphenylamines in polar solvents

Molecules of C60 covalently connected with N-ethylcarbazole (EtCz) and triphenylamine (TPA) have been synthesized. Photoinduced electron transfer in C60-EtCz and C60-TPA has been studied in polar and nonpolar solvents using time-resolved transient absorption and fluorescence measurements. From the fluorescence lifetimes, the excited singlet state of the C60 moiety (1C60) of C60-TPA generates predominantly C60*--TPA*+, which decays quickly to the ground state within 6 ns even in polar solvents. In the case of C60-EtCz, on the other hand, about half of the 1C60 moiety generates short-lived C60*--EtCz*+, while the other half of the 1C60 moiety is transferred to the 3C60 moiety via intersystem crossing in dimethylformamide, in which the energy level of C60*--EtCz*+ is lower than that of 3C60. Thus, the charge separation takes place via 3C60 generating C60*--EtCz*+, having a lifetime as long as 300 ns, probably because of the triplet spin character of C60*--EtCz*+. A special property of the EtCz moiety to stabilize the hole in the charge-separated state was revealed.     

含水溶性碳笼烯的水凝胶

含水溶性碳笼烯的水凝胶陈立桅郑磊洪瀚李子臣周锡煌李福绵（北京大学化学系北京１００８７１）关键词水溶性碳笼烯，水凝胶，超氧负离子随着碳笼烯（Ｃ６０，Ｃ７０，ｆｕｌｅｒｅｎｅｓ）的简便制取方法［１］的问世，其应用，特别是其材料化自然被提到日程上来．...     

Piezoelectric crystal/surface acoustic wave biosensors based on fullerene C60 and enzymes/antibodies/proteins

The development of piezoelectric (PZ) quartz crystal and surface acoustic wave (SAW) biosensors based on fullerene C60 and immobilized C60-enzymes/antibodies/proteins for the detection of various biological species are reported. The C60 coated piezoelectric crystal sensors can be applied to the study of interactions between fullerene C60 and some biological species, such as enzymes, antibodies, proteins and heparin. The partial irreversible responses for some biospecies from C60 molecules were observed by the desorption study which implied that C60 could chemically react with these biological species. Thus, immobilized biological species, e.g. C60-GOD, C60-catalase, C60-urease, C60-lipase, C60-anti IgG, C60-heparin, C60-Hb, C60-Mb and C60-anti-Hb were successfully prepared. The immobilized C60-GOD, C60-catalase, C60-urease, C60-anti-IgG and C60-anti-Hb were employed as adsorbents onto quartz crystal of various piezoelectric biosensors to detect glucose, H₂O₂, urea, IgG, and hemoglobin respectively. The immobilized C60-lipase was applied to distinguishably catalyze the hydrolysis of some optical isomers such as L- and D-phenyalanine methyl ester and to determine these optical isomers. The immobilized C60-heparin was employed as a good inhibitor for blood clotting like solvated heparin. The H₂O₂ bio-sensor was set up with the immobilized C60-catalase to detect oxygen, the product of the hydrolysis of H₂O₂ by C60-catalase. The immobilized C60-GOD enzyme piezoelectric glucose sensor exhibited a good sensitivity and a good lower limit for glucose. A piezoelectric crystal urea biosensor based on immobilized C60-urease was also prepared to detect urea. Comparison between solvated and immobilized enzymes used for biosensors was also made. The C60-anti IgG or C60-anti-Hb coated IgG piezoelectric crystal sensors exhibited good sensitivity, selectivity and repeatability for IgG or hemoglobin. Fullerene C60-Hb and C60-myoglobin (C60-Mb) coated surface acoustic wave (SAW) immunosensors were prepared to detect the anti-hemoglobin (anti-Hb) and anti-myoglobin (anti-Mb) antibody, respectively. An electrochemical SAW (ESAW) detection system was also developed to detect glucose in aqueous solutions.     

C_（60）－PNVC光电导功能材料的形态与结构研究

用高分辨~（１３）Ｃ核磁共振技术与扫描电镜法研究了Ｃ_（６０）修饰的聚乙烯咔唑（ＰＮＶＣ）光电导功能材料。结果表明，Ｃ_（６０）与ＰＮＶＣ共混时彼此间存在快速动态电荷转移行为；Ｃ_（６０）含量对化学修饰的ＰＮＶＣ结构影响显著。最后比较了Ｃ_（６０），ＰＮＶＣ及用金属有机化学法制备Ｃ_（６０）－ＰＮＶＣ共聚物的亚微观形态结构差异。     

C60-地塞米松的激光激发

利用激光光解装置检测了C60-地塞米松(C60-DE)的苯溶液在355 nm激光照射下产生的激发三重态, 3C60-DE*出现四个吸收峰, 分别位于700、440、350 和310 nm. 在330 nm处观察到了它的漂白吸收最大值, 这与其基态吸收最大值相对应. 3C60-DE*能够将能量转移给O2分子而淬灭. 与3C60*相比, 3C60-DE*的三重态鄄三重态(T-T)淬灭速率常数减小(3C60*为(5.03±1.31)×109 L·mol-1·s-1, 3C60-DE*为(3.53±0.87)×109 L·mol-1·s-1), 而寿命增加了(3C60*为(12.0±2.6) μs, 3C60-DE*为(18.0±3.3) μs), 这可能是C60分子上连接了地塞米松分子后减小了C60球之间碰撞的几率所致.     

Study of photoinduced electron transfer between [60]fullerene and proton-sponge by laser flash photolysis: addition effects of organic acid

Photoinduced electron-transfer processes between fullerene (C60) and 1,8-bis(dimethylamino)naphthalene, which is called a proton-sponge (PS), have been investigated by means of laser flash photolysis in the presence and absence of CF3CO2H. For a mixture of C60 and PS, the transient absorption spectra showed the rise of the C60 radical anion with concomitant decay of the C60 triplet (3C60), suggesting that photoinduced intermolecular electron transfer occurs via 3C60 in high efficiency in polar solvent. For a covalently bonded C60-PS dyad, photoinduced intramolecular charge-separation process takes place via the excited singlet state of the C60 moiety, although charge recombination occurs within 10 ns. For both systems, electron-transfer rates were largely decelerated by addition of a small amount of CF3CO2H, leaving the long-lived 3C60. These observations indicate that the energy levels for charge-separated states of the protonated PS and C60 become higher than the energy level of the 3C60 moiety, showing low donor ability of the protonated PS. Thus, intermolecular electron-transfer process via 3C60 for C60-PS mixture and intramolecular charge-separation process via 1C60-PS for C60-PS dyad were successfully controlled by the combination of the light irradiation with a small amount of acid.     

立方面心C60晶体晶格振动的研究

采用C60分子之间相互作用势的Kihra形式,研究了立方面心C60晶体的晶格振动问题,得到了质心振动沿[111]、[110]及[100]方向的声子散射圆频率分布曲线及C60晶格振动频率的态密度分布.采用所得到的C60晶格振动频率的态密度分布,计算了晶体C60在298 K时的等压热容,所得数值与实验值相符.     

Wavelength-dependent fragmentation and clustering observed after femtosecond laser ablation of solid C60

We report here the resonance effect in femtosecond laser ablation of solid C60 by investigating wavelength and fluence dependence of product ion species. When the ablation laser wavelength is far from the molecular absorption band of C60, we observe both C60-2n+ fragment ions and C60+2n+ cluster ions as well as C60+ parent ion. Delayed ionization of C60 is not significant. When the ablation laser wavelength is near resonant with the molecular absorption, we observe C60+ and some amount of C60-2n+ fragment ions depending on the laser fluence. Delayed ionization of C60 is significant in this case, which indicates high internal energy of C60 molecule. From the observations, we confirm the strong coupling of femtosecond laser energy with C60 molecule when the molecular absorption is high at the ablation laser wavelength.