title: Effective controlled release of captopril by silylation of mesoporous MCM-41.
abstract: The release of the water-soluble drug Captopril is controlled by tailoring the surface properties of mesoporous silica via stepwise silylation. The degree of silylation is manipulated by adjusting the initial concentration of silylanizing reagent (trimethylchlorosilane, TMCS). The silylanized and drug-loaded samples are characterized by powder X-ray diffraction, Fourier transform IR spectroscopy, N2 adsorption and desorption, 29Si cross-polarization magic angle spinning NMR spectroscopy, and transmission electron microscopy. The drug-loading amount is correlated to the Brunauer-Emmett-Teller surface area and surface hydrophilicity/hydrophobicity of the mesoporous silica material, while drug release profiles can be controlled by tailoring the surface properties and pore size.
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130023 (China).
authors.forename: Fengyu
authors.initials: F
authors.lastname: Qu
authors.forename: Guangshan
authors.initials: G
authors.lastname: Zhu
authors.forename: Shiying
authors.initials: S
authors.lastname: Huang
authors.forename: Shougui
authors.initials: S
authors.lastname: Li
authors.forename: Shilun
authors.initials: S
authors.lastname: Qiu
mesh_terms: D002216:Captopril / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D046529:Microscopy, Electron, Transmission; D009584:Nitrogen / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D014961:X-Ray Diffraction
chemical_list: C509968:MCM-41; D012822:Silicon Dioxide; D002216:Captopril; D009584:Nitrogen; D012825:Silicon