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Surface Investigation Of Chitosan Film With Fatty Acid Monolayers, M Misran
Surface Investigation Of Chitosan Film With Fatty Acid Monolayers, M Misran
Misni Misran
The surface pressure-molecular area (pi-A) isotherm curves of two fatty acids of different chain lengths, i.e. stearic (C(18)) and arachidic (C(20)) acids, were obtained by using Langmuir-Blodgett (LB) technique. Results showed clear isotherm plots with limiting mean molecular area around 21 angstrom(2) for both acids. However, the monolayer was found to collapse at higher than 33 mN m(-1) and 21 mN m(-1) for stearic acid and arachidic acid respectively. The effect of Langmuir-Blodgett monolayers of the acids was investigated by atomic force microscopy (AFM). Chitosan film, before and after dipping in water, was also studied by means of AFM so …
Octa-N-Butyl-1kappac,2kappac,3kappac,4kappac-Tetra-Kis(Mu-2-Hydroxy-Benzoato)-1:2 Kappao:O;2:3kappao:O';3:4kappao:O;1:4kappao:O'-Di-Mu(3)-Oxido-1:2:3kappao:O:O;1:3 :4kappao:O:O-Tetra-Tin(Iv), M Misran
Misni Misran
In the centrosymmetric tetra-nuclear title compound, [Sn4(C4H9)8(C7H5O3) 4O2], one of the two independent Sn atoms is five-coordinate in a cis-C2SnO3 trigonal-bipyramidal geometry [C - Sn - C = 142.7 (1)°]; the geometry is distorted owing to a long Sn⋯O(double bond) inter-action [Sn⋯O = 2.862 (1) Å]. The other Sn atom has a bent R 2Sn skeleton [C - Sn - C = 144.0 (1)°], but the geometry is best regarded as being a trans-C2SnO4 octa-hedron as the Sn-O(single bond) inter-action is shorter [Sn - O = 2.674 (1) Å].