Inclusion Compound Based Approach to Arrays of Artificial Dipolar Molecular Rotors. A Surface Inclusion

0378711 - ÚOCHB 2013 RIV US eng J - Článek v odborném periodiku
Kobr, L. - Zhao, K. - Shen, K. - Comotti, A. - Bracco, S. - Shoemaker, R. K. - Sozzani, P. - Clark, N.A. - Price, J. C. - Rogers, C. T. - Michl, Josef
Inclusion Compound Based Approach to Arrays of Artificial Dipolar Molecular Rotors. A Surface Inclusion.
Journal of the American Chemical Society. Roč. 134, č. 24 (2012), s. 10122-10131. ISSN 0002-7863. E-ISSN 1520-5126
GRANT EU: European Commission(XE) 227756 - DIPOLAR ROTOR ARRAY
Výzkumný záměr: CEZ:AV0Z40550506
Klíčová slova: controlled rotary motion * solid-state dynamics * aromatic nanochannels * NMR-spectroscopy * single-molecule
Kód oboru RIV: CC - Organická chemie
Impakt faktor: 10.677, rok: 2012

We describe an approach to regular triangular arrays of dipolar molecular rotors based on insertion of dipolar rotator carrying shafts as guests into channels of a host, tris(o-phenylenedioxy)cyclotriphosphazene (TPP). The rotor guests can either enter the bulk of the host or stay at or near the surface, if a suitable stopper is installed at the end of the shaft. Differential scanning calorimetry, solid-state NMR, and powder Xray diffraction were used to examine the insertion of a dipolar rotor synthesized for the purpose, 1-n-hexadecyl-12-(2,3-dichlorophenyl)-p-dicarba-closo-dodecaborane, and it was found that it forms a surface inclusion compound. Rotational barriers from 1.2 to 9 kcal/mol were found by dielectric spectroscopy and were attributed to rotors inserted into the surface to different degrees, some rubbing the surface as they turn.
Trvalý link: http://hdl.handle.net/11104/0210118