2001
DOI: 10.1039/b107257a
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Zwitterionic [2]rotaxanes utilising anionic transition metal stoppers

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Cited by 50 publications
(25 citation statements)
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“…41,42 On the other hand, there are fewer examples where an anionic stopper is used to compensate the positive charge on the axle as it is advantageous if they want to be incorporated into solid state devices. 43,44 Finally, zwitterionic rotaxanes where the positive charge is located on the macrocycle and the negative on the thread (without being on the stoppers) can also be found. There, the charged moiety is used to template the formation or locking of the macrocycle inside the thread.…”
Section: Synthesis Of Rotaxanesmentioning
confidence: 99%
“…41,42 On the other hand, there are fewer examples where an anionic stopper is used to compensate the positive charge on the axle as it is advantageous if they want to be incorporated into solid state devices. 43,44 Finally, zwitterionic rotaxanes where the positive charge is located on the macrocycle and the negative on the thread (without being on the stoppers) can also be found. There, the charged moiety is used to template the formation or locking of the macrocycle inside the thread.…”
Section: Synthesis Of Rotaxanesmentioning
confidence: 99%
“…This concept should be applicable to other interpenetrated systems and has the benefit of eliminating the need for multiple counterions, which often complicate the study of noncovalent interactions in solution [10] and can dictate surface interactions [11] and solid-state structures. [12] Herein we present the preparation of [2]pseudorotaxanes which utilize positively charged 1,2-bis(pyridinium)ethane axles and a negatively charged dibenzo[24]crown-8 ether wheel containing two pendant sulfonate (SO 3 À ) functionalities (DSDB24C8 2À ; see Scheme 1). The addition of two sulfonate groups to DB24C8 was accomplished by heating a solution of DB24C8 in CH 3 CN with a slight excess of sulfuric acid for 16 hours.…”
mentioning
confidence: 99%
“…Koordinationsgeometrien von in metallorganische verschlungene Strukturen eingebauten Metallionen. a) 1808-Verbindungsstücke [für i) lineare, [95] ii) tetraedrische, iii) quadratisch-planare, [96] und iv) oktaedrische Koordinationsgeometrien]; b) 908-Verbindungsstücke [für i) quadratisch-planare [91] sowie ii) pyramidale mit quadratischem Grundriss [90] und iii) oktaedrische [97] Koordinationsgeometrien]; c) außerdem wurden Koordinationskomplexe als "Stoppergruppen" eingesetzt [für i) quadratisch-planare, [98] ii) tetraedrische [99] und iii) oktaedrische [20] Koordinationsmotive]. [101] und beruhte auf Kupfer(I)-katalysierten terminalen Alkin-Azid-1,3-Cycloadditionen (CuAAC) zum Aufbau eines [2]Rotaxans.…”
Section: Koordinationsgeometrie Und Auswahl Der Metallionenunclassified
“…[236] Das von Loeb eingeführte Pseudorotaxanmotiv mit einem DB24C8-Kronenether-1,2-Bis(pyridiniumethan)-Kation [5c] (siehe Schema 53 a) diente der Erzeugung der [ À in einem Verhältnis von 2:1 (Abbildung 15 a). [99] Eine Behandlung des Pseudorotaxans mit Co II -oder Zn II -Tetrafluoroborat in einer Stçchiometrie von 1:1 in einem koordinierenden Lçsungsmittel führte zu 1D-Polyrotaxanen, die als "Metall-organische Rotaxangerüste" (metal-organic rotaxane frameworks, MORFs) bezeichnet werden, [241] wo- [232] Schema 63. Um Silber(I) angeordnetes 1D-Polyrotaxan (172-Ag I ), hergestellt von Kim und Mitarbeitern.…”
Section: Ferrocen-und Porphyrinbausteine Als Stopperunclassified
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