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Investigation of Inclusion Complexes Between α-cyclodextrin and Ferrocene by ESI-MSn and Cyclic Voltammetry

Chemical Research in Chinese Universities 2005年第1期21卷 117-118页

作者： GUOLi-min LIUZhi-qiang LIUShu-ying ChangchunInstituteofAppliedChemistry ChineseAcademyofSciencesChangchun130022P.R.China

The inclusion complexes of α-cyclodextrin(α-CD) and FcCO2(CH2)18 (FcSH) and their self-assembled monolayers(SAMs) on gold surface were investigated by electrospray tandem ionization mass spectrometry(ESI-MSn) and cyclic voltammetry, respectively. The interfacial electrochemical response of the SAMs is related to the way in which the inclusion complexes formed.

关键词： Ferrocene α-cyclodextrin Inclusion complex ESI-MSn Cyclic voltammetry

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Efficiency of Crude α-cyclodextrin in Gold Recovery from Electronic Waste and Soil

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Green and Sustainable Chemistry 2022年第3期12卷 73-82页

作者： Ibrahim Karume Simon Tewolde Emmanuel Tebandeke Is’harq Z. T. Mukasa Ruth Mbabazi Department of Chemistry Makerere University Kampala Uganda Department of Chemistry Faculty of Science Kabale University Kabale Uganda

In this study, the metal coordination ability of alpha-cyclodextrin (α-CD) was employed to complex gold and thus isolate and extract it from different matrices of acid-digests of electronic waste and soil. The crude α-CD used was extracted from cassava and yam starch of the non-edible plant species using E. coli α-cyclodextrin glucanotransferase (α-CGTase), with yields ≥ 62%. The reaction was monitored progressively by ultraviolet-visible spectroscopy and checked with infrared spectroscopy (IR) for the presence of α-CD. The crude α-CD extract without need for purification was refluxed with gold containing-electronic waste and soil predigested in a mixture of NaBr/HNO3 for 4 - 7 days. Recoveries of up to 22.9% and 70.8% gold were achieved from electronic waste and soil, respectively using 0.1 M α-CD. This approach is cheap, effective, and environmentally benign.

关键词： Starch α-cyclodextrin Electronic Waste Soil Gold

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PVA Nanofibers Containing Ofloxacin-cyclodextrin Inclusion Complex: Improve Optical Stability of Ofloxacin

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Open Journal of Organic Polymer Materials 2019年第2期9卷 29-46页

作者： Mohammad Mehrizi Sahar Amiri Seyed Hajir Bahrami Department of Polymer Engineering Science and Research Branch Islamic Azad University Tehran Iran Department of Textile Engineering Amirkabir University of Tehran Tehran Iran

Ofloxacin is an antibiotic with a wide range of activity against bacterial infections, but due to the high potential for toxicity when exposed to light, resolving this problem and further stabilizing the drug are among the posed challenges. Inclusion complex formation between α-cyclodextrin (α-CD), ofloxacin (OFL) and polyethylene glycol (PEG) was prepared via two methods to produce nanocontainers with desirable stability. The effect of PEG as compatible solubilizing agent and mixing condition (in ultrasonic bath) were investigated in formation of an inclusion complex between α-CD/OFL. Obtained complexes were examined by FTIR, H-NMR, SEM, EDX and UV which indicated the formation of an inclusion complex between α-CD/OFL, in turn, is a mixture of the cage and channel structures. Differences between 1H-NMR, FTIR and XRD spectra of OFL, CDs and inclusion complex indicated the formation of α-CD/OFL and supramolecular containers in solid phase. These inclusion complexes loaded in PVA-based nanofibers for smart nanofibers with controlled release manner and higher stability of OFL. Obtained nanofiber showed that nanofibers containing CDs/OFL under sonic energy containing higher degree of OFL.

关键词： Supramolecular Containers α-cyclodextrin Ofloxacin Optical Stability Electrospinning

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Slightly Cross-Linked Polyrotaxanes Made by Linking α-cyclodextrins Entrapped in Polyrotaxanes Using Hexamethylene Diisocyanate

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Chinese Journal of Chemistry 2012年第10期30卷 2453-2460页

作者：李硕王锦姜岚叶霖张爱英冯增国 School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

In this study polyrotaxane （PR）-based triblock copolymers were first synthesized via the atom transfer radical polymerization （ATRP） of N-isopropylacrylamide initiated with the self-assembly of a distal 2-bromoisobutyryl end-capped Pluronie 17R4 with a varying amount of a-cyclodextrins （a-CDs） in the presence of CuCI/PMDETA at 25 ℃ in aqueous solution. The a-CDs entrapped on the copolymer chain were then linked with hexamethylene diisocyanate to give rise to novel slightly cross-linked polyrotaxanes （SCPRs） in DMF at 45 ℃. The structures of the PR-based triblock copolymers and SCPRs were characterized by 1H NMR, 13C CP/MAS, GPC and TGA analy- ses. The number-average molecular weight of the resulting SCPRs was nearly three and five times of their precursor after linking with a low polydispersity index range of 1.08--1.28. The thermo-responsive transition of both PR-based supramolecular polymers in aqueous solution was demonstrated by turbidity measurements and the self-aggregated morphologies were also evidenced by TEM observations.

关键词： α-cyclodextrin polyrotaxane ATRP poly(N-isopropylacrylamide) hexamethylene diisocyanate

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SYNTHESIS AND CHARACTERIZATION OF POLYROTAXANES MADE FROM α-CDs THREADED ONTO TRIBLOCK COPOLYMERS WITH PEG AS A CENTRAL AXLE AND FLANKED BY TWO LOW MOLECULAR WEIGHT POLYSTYRENES AS OUTER STOPPERS

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Chinese Journal of Polymer Science 2008年第6期26卷 723-732页

作者：冯增国 School of Materials Science and Engineering Beijing Institute of Technology

A study has been conducted on the synthesis and characterization of a kind of novel polyrotaxanes comprisingα- cyclodextrins (α-CDs) threaded on triblock eopolymers with poly(ethylene glycol) (PEG) as a central axle and flanked by two low molecular weight polystyrenes as outer *** was allowed to telomerize with polypseudorotaxanes as chain transfer agents made from the self-assembly of a distal thiol-capped PEG with a varying amount ofα-CDs in the presence of a redox initiation system at 40~C i...

关键词： Polyrotaxane α-cyclodextrin Polystyrene Radical telomerization.

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α-环糊精对BTTN、NG分子识别的LC-MS研究

α-环糊精对BTTN、NG分子识别的LC-MS研究

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中国有机质谱学第十三届全国学术大会

作者：张敏史真白银娟高勇西北大学化学系

随着LC-MS的迅猛发展,用LC-MS分析含能化合物韵文章已有若干报道,但丙三醇三硝酸酯(NG)、丁基三醇三硝酸酯(BTTN)由于很容易分解,故用电喷雾电离质谱(ESI-MS)得到这两种化合物的分子离子峰是很不容易的;如用正离子检测模式得不到质谱图... 详细信息

随着LC-MS的迅猛发展,用LC-MS分析含能化合物韵文章已有若干报道,但丙三醇三硝酸酯(NG)、丁基三醇三硝酸酯(BTTN)由于很容易分解,故用电喷雾电离质谱(ESI-MS)得到这两种化合物的分子离子峰是很不容易的;如用正离子检测模式得不到质谱图。环糊精(α-CD) 作为主体与小分子、中分子有机化合物能形成包结复合物已被广泛使用,本文巧妙地应用α-环糊精与NG、BTTN形成的包结复合物,然后用ESI MS的正离子检测模式对NG、BTTN的包结物进行检测,这两种包结物的分子离子峰为基峰,从而可以很好地用间接的方法测出NG、BTTN的相对分子质量。

关键词： α-cyclodextrin BTTN NG Molecular recognition Liquid chromatogragh-mass spectrometry

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