907216-28-8 Usage
Description
n-Hexadecyltrimethylammonium-d42 Bromide, also known as Isotope labelled Hexadecyltrimethylammonium Bromide (CTAB), is a cationic surfactant with a unique molecular structure. It is characterized by a long hydrocarbon chain and a positively charged quaternary ammonium group, which allows it to interact with various substances and form self-assembled structures.
Uses
Used in the Synthesis of Mesoporous γ-Fe2O3:
n-Hexadecyltrimethylammonium-d42 Bromide is used as a template in the synthesis of Mesoporous γ-Fe2O3, a type of magnetic iron oxide nanoparticle. The cationic surfactant forms self-assembled structures with the inorganic precursors, guiding the formation of the mesoporous structure in the resulting material. This unique structure enhances the properties of γ-Fe2O3, making it suitable for various applications, such as drug delivery, catalysis, and magnetic resonance imaging (MRI) contrast agents.
Check Digit Verification of cas no
The CAS Registry Mumber 907216-28-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,7,2,1 and 6 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 907216-28:
(8*9)+(7*0)+(6*7)+(5*2)+(4*1)+(3*6)+(2*2)+(1*8)=158
158 % 10 = 8
So 907216-28-8 is a valid CAS Registry Number.
907216-28-8Relevant articles and documents
Neutron Reflection from Hexadecyltrimethylammonium Bromide Adsorbed at the Air/Liquid Interface: The Variation of the Hydrocarbon Chain Distribution with Surface Concentration
Lu, J. R.,Hromadova, M.,Simister, E. A.,Thomas, R. K.,Penfold, J.
, p. 11519 - 11526 (1994)
We have determined the structure of a monolayer of hexadecyltrimethylammonium bromide adsorbed at the air/water interface at its critical micelle concentration (9.2 x 10-4 M) and at two lower concentrations using neutron specular reflection.We have used isotopic labeling to determine the relative positions of chains, heads, and solvent, and more detailed labeling to determine the distributions of C6 chain fragments at either end of the alkyl chains.The use of the more detailed labeling scheme has allowed us to make a quantitative estimate of the contribution of surface roughness to the structure of the layer at the three concentrations, to show that the alkyl chains are, on average, strongly tilted away from the surface normal but that the part of the alkyl chain next to the head group is less tilted.The different tilt angle distributions for the two ends of the hydrocarbon chain also indicate that there are gauche defects in the chain.