A molecular ball bearing mediated by multiligand exchange in concert

Angewandte Chemie - International Edition

Volumn 43, Issue 29, 2004, Pages 3814-3818

  Hiraoka, Shuichi ^a   Hirata, Kaori ^a   Shionoya, Mitsuhiko ^a  

^a UNIVERSITY OF TOKYO   (Japan)

Author keywords

Ligand exchange; Molecular recognition; Self assembly; Silver; Supramolecular chemistry

Indexed keywords

BALL BEARINGS; ION EXCHANGE; IONS; SILVER;

MOLECULAR BALL BEARINGS; MULTILIGAND EXCHANGE; THRUST BALL BEARINGS;

MOLECULAR DYNAMICS;

LIGAND; METAL ION; SILVER;

ARTICLE; ELECTROSPRAY MASS SPECTROMETRY; MOLECULAR DYNAMICS; MOLECULAR INTERACTION; PARTICLE SIZE; PROTON NUCLEAR MAGNETIC RESONANCE; THERMODYNAMICS;

EID: 4544367583     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200453753     Document Type: Article

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17. 3(1)(2)] and the discussion on the energy barrier of the metal-ligand exchange are described in detail in ref. [14].
18. See Supporting Information.
19. + complexes.
20. The relatively free rotation of the two disks in the ball bearings contains every rotational motion produced by the combination of the metal-ligand exchange and the flip motion between the P and M isomers, such as a 360° full rotation and a back and forth movement.
21. ≠. Here we discuss the relative energy differences between the energy barriers of the ligand exchanges and the flip motions using the greater one in each motion.
22. 3(1)(4)] complex at 203 K were confirmed by its H-H COSY spectrum, as shown in the Supporting Information.
23. -1.[14] The rate of a single 360° rotation is at least six times greater than the rate of metal-ligand exchange, and hence the maximum rotation rate can be estimated to be about 8000 rps.