title: Mapping of the organization of p-nitroaniline in SAPO-5 by second-harmonic generation microscopy.
abstract: Second-harmonic generation microscopy (SHGM) has been employed to study crystals of zeolite-like material SAPO-5 filled with p-nitroaniline (PNA). The SHG and 2-photon fluorescence response of PNA in the one-dimensional channels readily reveals the pore accessibility; intergrown crystallites containing hexagonal pyramidal components and internal diffusion barriers are found next to seemingly perfect crystals. The sensitivity of second-harmonic generation to molecular orientation allowed for mapping of the domains of differently organized PNA. Dense domains of highly aligned PNA alternate with dilute zones with loosely aligned PNA.
authors: Centre for Surface Chemistry and Catalysis, K. U. Leuven, Kasteelpark Arenberg 23, 3001 Leuven, Belgium.
authors: Monique A
authors: MA
authors: van der Veen
authors: Jasper
authors: J
authors: Van Noyen
authors: Bert F
authors: BF
authors: Sels
authors: Pierre A
authors: PA
authors: Jacobs
authors: Thierry
authors: T
authors: Verbiest
authors: Dirk E
authors: DE
authors: De Vos