Results 221 to 230 of about 210,013 (270)
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Dibenzotetraaza Crown Ethers: A New Family of Crown Ethers Based on o-Phenylenediamine
The Journal of Organic Chemistry, 2005Dibenzotetraaza (DBTA) crown ethers possess two o-phenylenediamine moieties. They are homologues of dibenzo crown ether phase-transfer catalysts and were prepared from the condensation of benzimidazoles with oligo(ethyleneglycol) dichlorides and oligo(ethyleneglycol) ditosylates.
Sven H, Hausner +3 more
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ChemInform Abstract: Novel Crown Ethers by Oxidative Cycloaddition of Thiopheno Crown Ethers.
ChemInform, 1995AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Y. Q. LI +3 more
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2017
In this chapter, we demonstrated different strategies toward the construction of photochromic crown ethers in order to obtain the capability to recognize the chemical guest while retaining the photoswitchability. The complex formation in photochromic crown ether can be either spontaneous or stimulated by irradiation with light of the photochromic part.
Olga Fedorova +2 more
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In this chapter, we demonstrated different strategies toward the construction of photochromic crown ethers in order to obtain the capability to recognize the chemical guest while retaining the photoswitchability. The complex formation in photochromic crown ether can be either spontaneous or stimulated by irradiation with light of the photochromic part.
Olga Fedorova +2 more
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Russian Journal of General Chemistry, 2002
Studies on mesomorphic crown ethers, their analogs, published during the past two decades'are briefly summarized and correlated. Speicific features of mesophase formation, as influenced by the structure of the macrorings, are analyzed. The effect of structural factors on formation of various types of liquid crystals is discussed.
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Studies on mesomorphic crown ethers, their analogs, published during the past two decades'are briefly summarized and correlated. Speicific features of mesophase formation, as influenced by the structure of the macrorings, are analyzed. The effect of structural factors on formation of various types of liquid crystals is discussed.
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Application of Ethers and Crown Ethers
Ethers, polyethers, and crown ethers have received particular interest in various research fields owing to advantageous features of the materials such as good resistance to heat, radiation, corrosion, impact ability, and creep deformation, nontoxicity, good hydrolysis resistance, flame retardance, excellent dimensional stability and electrical ...openaire +1 more source
Angewandte Chemie International Edition in English, 1976
F, Vögtle, K, Frensch
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F, Vögtle, K, Frensch
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1991
Crown Ethers and Cryptands introduces the broad and basic principles of crown ether and cryptand chemistry at the advanced undergraduate, graduate and working professional level. The book provides a brief introduction, outlining the history of the field and goes on to cover syntheses, complexation of cations and molecules, complex structures ...
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Crown Ethers and Cryptands introduces the broad and basic principles of crown ether and cryptand chemistry at the advanced undergraduate, graduate and working professional level. The book provides a brief introduction, outlining the history of the field and goes on to cover syntheses, complexation of cations and molecules, complex structures ...
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The synthesis of novel crown ethers Part.I,Coumarin Derivatives of Crown Ethers,(#)
2022, The synthesis and structural characterisation of coumarin derivatives of some macrocyclic ethers was reported. They were obtained from 1,2,3-trihydroxy and 1,2,4-trihydroxyphenols by reacting with ketoesters. The reaction of dihydroxy coumarins with dichlorides of polyglycols in potassium carbonate /DMF/ water afforded the crown ethers in good yields.
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Unsaturated crown ethers. 3. Syntheses of stilbeno crown ethers
The Journal of Organic Chemistry, 1985Yoshihisa Inoue +4 more
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ChemInform Abstract: UNSATURATED CROWN ETHERS: STILBENO‐CROWN ETHERS
Chemischer Informationsdienst, 1982Y. INOUE +4 more
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