Musée littéraire : choix de littérature contemporaine française et étrangère. Série 41

Collection : Le siècle ; 1-46

Resolución N° 41 ¿Se debe encontrar debidamente probado el interés legitimo para recurrir, o cualquier persona esta facultada para interponer recursos contra el acto administrativo de registro?

Servicios registrales

The Weekly Messenger, 30 July 1813 (vol. 2, no. 41) - Newspaper

Volumes of interest were published between 1812 and 1815 with articles about the War of 1812.

The War, 29 March 1814 (vol. 2, no. 41, whole no. 93) - Newspaper

Volumes of interest were published between 1812 and 1815 with articles about the War of 1812.

HG 388.75-388.85

Dark brown sample with clasts that range from small to large. The clast shape ranges from angular to sub-rounded. Grain crushing is present in this sample along with some lineations. Faint water escape structures can also be seen.

Les diplômés – no 388, hiver 1996

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Équipe 41 - Calendrier Schizophrénie

Personnes responsables: Alexis Jutras (alex.j.nihon@gmail.com), Martin Chaput-Tanguay (martin.chaput-tanguay@umontreal.ca), Alexandre Aspirot (alexandre.aspirot@umontreal.ca) Note: Pour une meilleure résolution des documents, s.v.p nous contacter

Modified mesoporous MCM-41 as hosts for photochromic spirobenzopyrans

The influence of the chemical composition and silylation of mesoporous MCM-41 materials on the photochromic behaviour of adsorbed spiropyran (BIPS) and 6-nitrospiropyran was studied. Upon incorporation, the spiropyrans underwent ring opening to form either zwitterionic merocyanine or its corresponding O-protonated form. In all silica MCM-41 or in the MCM-41 containing aluminium, the O-protonated merocyanine was predominantly formed. In the case of MCM-41 modified by silylation of the OH groups, a mixture of zwitterionic merocyanine and spiropyran was present. The photochromic response was studied by means of steady-state irradiation and by laser flash photolysis. Steady-state irradiation (λ > 450 nm) of the solid samples gives rise in all cases to an intensity decrease of the absorption bands corresponding to either the protonated or the unprotonated merocyanine form (reverse photochromism). In contrast, laser flash photolysis at 308 nm of spiropyrans supported on silylated MCM-41 allows observation of the photochemical ring opening of residual spiropyran to the corresponding zwitterionic form (normal photochromism).