Transient absorption spectroscopy and photochemical reactivity of CAU-8

Abstract

Graphenes as metal-free catalysts for the oxidative depolymerization of lignin modelsJuan F. Blandez, [b] Sergio Navalón, [b] Mercedes Alvaro, [b] and Hermenegildo Garcia* [a] Abstract: Graphene oxide promotes the oxidative degradation of guaiacylglycerol-β-guaiacyl ether, a lignin model compound, in different solvents including acetonitrile, toluene and water mainly to guaiacol, 2-methoxyquinone, vanillic acid and coniferyl aldehyde.Reduced graphene oxide and B-doped graphene exhibit similar activity as graphene oxide. Control experiments indicate that metal impurities should play a marginal role in the observed catalytic activity.

Delamination and Photochemical Modification of a Novel Two‐Dimensional Zr‐Based Metal–Organic Frameworks

“…Baldovi et al . had already shown the photochemical reactivity of the keto group in CAU‐8 with acetonitrile and ethanol.…”

“…In this study, the linker benzophenone‐4,4′‐dicarboxylic acid (H 2 bzpdc ) (Figure ) was chosen due to the possibility for post‐synthetic modification at the photoreactive keto group. The first MOF reported in the literature containing this linker molecule is CAU‐8 with Al 3+ as metal cation . Further investigations indicated a possible post‐synthetic modification of the framework performed on the keto group of the linker molecule …”

“…The first MOF reported in the literature containing this linker molecule is CAU‐8 with Al 3+ as metal cation . Further investigations indicated a possible post‐synthetic modification of the framework performed on the keto group of the linker molecule …”

Inside/Outside: Post‐Synthetic Modification of the Zr‐Benzophenonedicarboxylate Metal–Organic Framework

“…The synthesis made use of the modulation method and lead to a compound with formula Zr 6 O 4 (OH) 6 (HCO 2 ) 2 ( bzpdc ) 4 . Stock and co‐workers have used this linker for the construction of the MOF CAU‐8 with the formula Al(OH)(O 2 C‐C 6 H 4 ‐CO‐C 6 H 4 ‐CO 2 ) and have studied its photochemical behavior . The Zr‐ bzpdc ‐MOF has a two‐dimensional layered structure, can be delaminated to thin nanosheets and exhibits a moderate porosity of 650 m 2 g −1 .…”

“…[24] The synthesis made use of the modulation method [25,26] and lead to ac ompound with formula Zr 6 O 4 (OH) 6 (HCO 2 ) 2 (bzpdc) 4 .S tock and co-workers have used this linker fort he constructiono ft he MOF CAU-8 with the formula Al(OH)(O 2 C-C 6 H 4 -CO-C 6 H 4 -CO 2 )a nd have studied its photochemicalb ehavior. [27,28] The Zr-bzpdc-MOF has at wo-dimensional layered structure, can be delaminatedt ot hin nanosheets and exhibits am oderate porosity of 650 m 2 g À1 .I ts high chemicala nd thermals tabilitym ake it highly suitable for PSM reactions. In ap reliminarys tudy,w eh ave converted this MOF in photochemical PSM reactions with decane and PEG and have observed drastically different wetting properties of the products.…”