@article {RN51,
	title = {Collective Modes and Biaxial Ordering Observed by Deuterium NMR in the Nematic Phases of an Organosiloxane Tetrapode},
	journal = {Molecular Crystals and Liquid Crystals},
	volume = {510},
	year = {2009},
	note = {n/a},
	pages = {158-174},
	type = {Journal Article},
	abstract = {<p>Calculations of deuterium NMR spectra were performed using a model of slow motions based on the collective modes present in liquid crystalline systems and evaluated within the Landau de Gennes free energy expansion on the order parameter tensor. Simulations obtained with this model are applied to the case of deuterium NMR spectra collected in static and rotating samples of organosiloxane tetrapodes exhibiting uniaxial and biaxial nematic phases. The analysis of the slow motions influence on deuterium NMR spectra shows that molecular motions within a time-scale of the order of magnitude of NMR observation times are particularly effective on modulating the NMR line-shape in the case of the liquid crystalline system investigated.</p>
},
	keywords = {biaxiality collective modes dendrimers deuterium nmr organosiloxane tetrapodes liquid-crystals},
	issn = {1542-1406},
	doi = {Pii 915278150 10.1080/15421400903060888},
	url = {<Go to ISI>://WOS:000270155300018},
	author = {J. L. Figueirinhas and C. Cruz and Feio, G. and Mehl, G. H.}
}
