We report {on the|around the} characterisation of {a number of|numerous|several|quite a few|a variety of|many} liquid-crystalline {materials|supplies|components} featuring cyclic terminal groups, which {lead to|result in|bring about|cause} {significant|substantial|considerable|important} enhancements {in the|within the|inside the} temperature {range|variety} {of the|from the|in the|on the|with the|of your} mesomorphic state. {Materials|Supplies|Components} with only {short|brief|quick} terminal chains are {able to|in a position to} {support|assistance|help} lamellar mesophase formation by appending {a large|a sizable|a big} terminal cyclic unit {at the|in the} {end|finish} of a {short|brief|quick} methylene spacer.X-ray scattering experiments reveal that the layer spacings {of the|from the|in the|on the|with the|of your} lamellar smectic phase are {significantly|considerably|substantially|drastically} {larger|bigger} when a cyclic end-group is present than for equivalent linear unsubstituted {materials|supplies|components}, but {there is no|there isn’t any|there’s no|there is absolutely no} {effect|impact} on orientational order.{Fully|Totally|Completely} atomistic molecular dynamics simulations faithfully reproduce experimental layer spacings and orientational order parameters, and indicate that the cyclic terminal units spontaneously segregate into diffuse sub-layers and {thus|therefore|hence|as a result} {cause|trigger|result in|lead to|bring about} the {increased|elevated|improved|enhanced} layer spacing. This shape segregation predicted by molecular dynamics simulations is observed {in the|within the|inside the} crystalline {solid|strong} state by X-ray diffraction. Price of 2653202-15-2 848821-76-1 Order PMID:23554582
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