摘要
Theorientationalorderoftwoliquidcrystals,namely,6-[4-(4-nitrophenylazo)phenyloxy]hexyldiethanolamines(C6)and10-1-bromo[4-(nitrophenylazo)phenyloxy]alkane(B10)wasstudiedbymeansof2HNMRspectroscopywithhexamethylbenzene-d18astheprobemolecule.TheresultsshowthatthedirectorsinthesmecticAphaseofC6andthenematicphaseofB10couldbealigned,whichwasparalleltothemagneticfield.TheorientationalorderparameterofthesolutemoleculesinC6wasabout0.2,whileitisonly0.1inB10,whichisexpectedbecausethemoreorderedsmecticphasetendstoalignsolutemoleculestoahighlevel.ComparedtotheorientationalorderparameterofthesoluteintheSmCphaseof4[3,4,5-tris(4-dodecyloxybenzyloxy)-benzoyloxy]-4-(4′-dodecyloxybenzoyloxy)biphenyl(Ⅰ)(P2=0.14),itislargerinSmAphaseofC6.TherelativelyhigherorientationalorderparameterofthesoluteinC6isattributedtotheformationofintermolecularH-bondsintheSmAphaseofC6.
出版日期
2001年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)