Media type: E-Article Title: Internal and External Acidity of Faujasites As Measured by a Solvatochromic Spiropyran Contributor: Kahle, Ingolf; Spange, Stefan Published: American Chemical Society (ACS), 2010 Published in: The Journal of Physical Chemistry C, 114 (2010) 36, Seite 15448-15453 Language: English DOI: 10.1021/jp1048106 ISSN: 1932-7455; 1932-7447 Origination: Footnote: