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| 1 | Molecular recognition study on a supramolecular system (Ⅷ) --The fluoroscopic study on inclusion complexation of adamantanol with cyclodextrin derivatives显示文摘The fluorescence spectral titrations have been performed in phosphate buffer solution (pH 7 2) at room temperature to give the stability constants for inclusion complexation of a series of chemically modified β cyclodextrins bearing aromatic groups with adamantanol. The molecular recognition mechanism is discussed from the viewpoint of the structural factors, electron effect of the substitutent groups and the size and chain length of the fluorophore. The results indicate that the complex stability of the cyclodextrin derivatives bearing a positively charged pyridinio moiety can be enhanced by the electrostatic interaction between the host cyclodextrins and the adamantanol guest and the microenvironment change plays a crucial role in the inclusion complexation. | LIU Yu, ZHANG Yimin, QI Aidi, WANG Qiuchang and CHEN Rongti Department of Chemistry, Nankai University, Tianjin 300071, China | 1998 | Chinese Science Bulletin1998，43，4： | 2 |
| 2 | Kinetics of reduc- tion of magnesia with carbon显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2002 | Thermochim Acta2002，390，： | 1 |
| 3 | Kinetics and mecha- nism of carbothermic reduction of magnesia显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2003 | Metall Ma- ter Trans B2003，34，： | 1 |
| 4 | Catalytic reduc- tion of magnesia by carbon显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2003 | Thermochim Acta2003，398，： | 1 |
| 5 | Kinetics and mechanism of carbothermic reduction of magnesia显示文摘 | Rongti Li Wei Pan and Sano Masamichi | 2003 | Metallurgical and Materials Transactions B2003，34，4： | 1 |
| 6 | Kinetics of reduction of magnesia with carbon显示文摘 | Rongti Li Wei Pan Sano Masamichi | 2002 | Thennochimica Acta2002，390，12： | 1 |
| 7 | Kinet- ics of Reduction of Magnesia with Carbon 显示文摘 | Li Rongti Pan Wei Masamici Sano Jiangqiang Li | 2002 | Thermo- chimiea Acta 2002 : 145 - 1512002，2002，： | 1 |
| 8 | Thermodynamic properties of Ti in Ag- Cu -Ti Alloys显示文摘 | Li Rongti Pan Wei Chen Jian | 2002 | Materials Science and Engineering A2002，335，： | 1 |
| 9 | Kinetics and mechanism of carbothermic reduction of magnesia显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2003 | Metallurgical and Materials Transactions B2003，，4： | 1 |
| 10 | Kinetics and Mechanism of Carbothemnic Reduction of Magnesia显示文摘 | LI RONGTI PAN WEI MASAMICHI SANO | | 0，，08： | 1 |
| 11 | Molecular recognition study on a supramolecular system (ⅩⅤ)──Molecular recognition of aliphatic alcohols by some phenyl-selenium modified β-cyclodextrins显示文摘The spectrophotometric titrations have been performed at 298.15 K in buffered aqueous solution (pH 7.20) to give the stability constants (logK-s) for the supramolecular system formed by mono-[6-(phenylseleno)-6-deoxy]-β-cyclodextrin (2), mono-[6-(p-tolylseleno)-6-deoxy]-β-cyclodextrin (3), mono-[6-(o-tolylseleno)-6-deoxy]-β-cyclodextrin (4), mono-[6-(m-tolylseleno)-6-deoxy]-β-cyclodextrin (5) with a series of aliphatic alcohols. The results were compared with the data reported for the parent β-cyclodextrin. The molecular binding ability and selectivity for aliphatic alcohols of modified β-cyclodextrins (25) were discussed from the viewpoints of the induced-fit and geometrical complement. The results obtained indicate that the phenylseleno moiety of β-cyclodextrin derivatives (25) as a probe for spectrometry can enhance not only the molecular binding ability but also the molecular recognition ability. | LIU Yu, LI Bin, LI Ziyun and CHEN Rongti Department of Chemistry, Nankai University, Tianjin 300071, China | 1998 | Chinese Science Bulletin1998，43，12： | 0 |
| 12 | STUDY ON THE SEPARATION OF PENTOSE AND HEXOSE FROM GLUCOSE YEAST WATER显示文摘D-ribose is a unique, 5-carbon sugar that occurs naturally in all living cells. D-ribose has been used as a staring material for preparation of some certain medicines or just as a new nutraceutical that helps the body naturally restore its energy level. The fermentative processes are the best for their relatively simple series of production steps and relatively cheap starting materials. However, because of the many impurities in glucose yeast water and its dark color, pretreatment and purification must be done to the fluid before D-ribose can be separated. In this paper, separation and purification of D-ribose was carried out using cation exchange resins, of which Ca2+ exchange resin had the best effect. The optimal condition for adsorption is a flow velocity of 0.5BV/h at adsorption temperature of 25℃. The optimal condition for desorption is a flow velocity of 0.5 BV/h at desorption temperature of 80℃. | ZHENG Changcheng ZHANG Jinfeng LU Yan DENG Guocai CHEN Rongti | 2000 | Chinese Journal of Reactive Polymers2000，9，2： | 0 |
| 13 | STUDY ON THE DECOLORIZATION OF D-RIBOSE ZYMOTIC FLUID BY RESIN ADSORPTION显示文摘In this paper, effects on of six type of resins the decolorization of D-ribosezymotic fluid have been studied for the fist time. The results show that resinNKA-II has the best effect. the decolorization rate of D-ribose zymotic fluid is91% at velocity of 1.0BV/hr and 25℃, the adsorption capacity can reach up to5.7BV. The effects of adsorption conditions as well as conditions of resinregeneration on the resin decolorization capability were also studied. | ZHENG Changcheng GUO Xianzhi DENG Guocai YANG Sihai CHEN Rongti(Department of Chemistry,Nankai University,Tianjin 300071) | 1999 | Chinese Journal of Reactive Polymers1999，8，1： | 0 |
| 14 | Nucleation and epitaxy growth of high-entropy REBa_(2)Cu_(3)O_(7-δ)(RE=Y,Dy,Gd,Sm,Eu)thin films by metal organic deposition显示文摘High-entropy REBa_(2)Cu_(3)O_(7-δ)(RE=Y_(0.7)+Dy_(0.2)+Gd_(0.2)+Sm_(0.2)+Eu_(0.2))(HE-REBCO) superconducting films doped with multiple rare earth elements were successfully fabricated with thickness up to 800 nm by a trifluoroacetate-metal organic deposition(TFA-MOD).The enhanced entropy change ΔS of the HEREBCO system promotes the c-axis growth of REBCO thin film in the competition with a/b-axis growth.The microstructure and element distribution were investigated by the transmission electron microscopy(TEM) and energy dispersive spectroscopy(EDS).The results show that HE-REBCO films have a great amount of stacking defects,lattice distortions and various rare earth oxides.Furthermore,the microstrain of HE-REBCO films increases significantly compared to the undoped YBCO and(Y,Dy)BCO films.Finally,the superco nducting critical temperature(T_c^(onset)) of HE-REBCO films is about 93 K,and the in-field properties are significantly improved,especially at the temperature of about 77 K.The maximum pinning force density(F_(p,max)) of the HE-REBCO samples at 77 K is 1.7 times higher than that of the undoped YBCO films. | Jing Chen Rongtie Huang Xinghang Zhou Difan Zhou Minjuan Li Chuanyi Bai Zhiyong Liu Chuanbing Cai | 2023 | Journal of Rare Earths2023，41，7： | 0 |
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