title: Probing cavitand-organosilane hybrid bilayers via sum-frequency vibrational spectroscopy.
abstract: Quinoxaline cavitands (QxCav) are transferred by Langmuir-Schaefer method on self-assembled monolayers (SAMs) of octadecyltrichlorosilane (OTS) and N,N-dimethyl-N-octadecyl-3-aminopropyltrimethoxysilyl chloride (DMOAP) on fused silica substrates. The molecular architectures of both the hydrophobic SAMs templates and the hybrid cavitand-organosilanes bilayers at the solid-air interface are investigated and correlated by sum-frequency vibrational spectroscopy. The results show that QxCav are always in the closed vase configuration and orient with their principal axis normal to the substrates. The role of the alkyl chains density in the SAM templates on the QxCav transfer ratio is pointed out.
authors.affiliation: Dipartimento di Fisica and ‡Licryl Laboratory, CNR-IPCF UOS di Cosenza, Universitá della Calabria , Ponte Pietro Bucci 33B, 87036 Arcavacata di Rende Cosenza, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Aprile
authors.forename: P
authors.initials: P
authors.lastname: Pagliusi
authors.forename: F
authors.initials: F
authors.lastname: Ciuchi
authors.forename: M P
authors.initials: MP
authors.lastname: De Santo
authors.forename: R
authors.initials: R
authors.lastname: Pinalli
authors.forename: E
authors.initials: E
authors.lastname: Dalcanale
mesh_terms: D004988:Ethers, Cyclic / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008958:Models, Molecular; D008968:Molecular Conformation; D012118:Resorcinols / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D013057:Spectrum Analysis; D013499:Surface Properties; D014732:Vibration
chemical_list: D004988:Ethers, Cyclic; D012118:Resorcinols; D012821:Silanes; C442939:cavitand; C061189:octadecyltrichlorosilane; D012822:Silicon Dioxide