English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Structure of Dipole Chains in an MFI Type Molecular Sieve

Reck, G., Marlow, F., & Kornatowski, J. (1996). Structure of Dipole Chains in an MFI Type Molecular Sieve. The Journal of Physical Chemistry, 100(5), 1698-1704. doi:10.1021/jp950454w.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Reck, G.1, Author
Marlow, F.2, 3, Author              
Kornatowski, J.4, 5, Author              
Affiliations:
1Bundesanstalt für Materialforschung und -prüfung, Rudower Chaussee 5, D-12489 Berlin-Adlershof, Germany, , ou_persistent22              
2Institut für Angewandte Chemie Berlin-Adlershof (ACA), Rudower Chaussee 5, D-12489 Berlin-Adlershof, Germany, ou_persistent22              
3Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445612              
4Institut für Brennstoffchemie und physikalisch-chemische Verfahrenstechnik der RWTH Aachen, Worringerweg 1, D-52074 Aachen, Germany, ou_persistent22              
5Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              

Content

show
hide
Free keywords: -
 Abstract: Several experimental methods demonstrate that adsorbed p-nitroaniline (pNA) forms a highly ordered guest structure in the pores of the MFI type molecular sieve Sb-Silicalite-1. The pNA molecules were located in the intersections of the two interconnected pore systems using single-crystal X-ray structure analysis. The molecular axes of the pNA molecules were found to deviate uniformly by 11° from the direction of the straight channels. The symmetry of the loaded molecular sieve crystals is altered by the pNA adsorption which is connected with the loss of inversion symmetry characterizing the unloaded crystals. The molecular orientation of the occluded pNA was confirmed by polarized Raman spectroscopy. Additionally, the Raman spectra inedicate the absence of intermolecular hydrogen bonding. Optical SHG (second harmonic generation) studies confirm the loss of inversion symmetry which is caused by the formation of oriented dipole chains with a preferred direction over macroscopic regions in the crystal. This sorbate structure is explained by a special uptake mechanism of the pNA molecules entering the molecular sieve pores. The pNA dipole chains in the MFI type framework match the lattice; they are weakly interconnecting and they are collectively aligned into the same direction.

Details

show
hide
Language(s): eng - English
 Dates: 1996-02-011996
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/jp950454w
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Journal of Physical Chemistry
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington DC : American Chemical Society
Pages: - Volume / Issue: 100 (5) Sequence Number: - Start / End Page: 1698 - 1704 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766_3