Subphthalocyanine encapsulated within MIL-101(Cr)-NH as a solar light photoredox catalyst for dehalogenation of α-haloacetophenones.

Dalton Trans

Departamento de Química, Universitat Politècnica de València, C/Camino de Vera, s/n, 46022, Valencia, Spain. and Instituto Universitario de Tecnología Química, CSIC-UPV, Universitat Politécnica de Valencia, Av. de los Naranjos, Valencia 46022, Spain and Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia.

Published: December 2019

Subphthalocyanine has been incorporated into a robust metal-organic framework having amino groups as binding sites. The resulting SubPc@MIL-101(Cr)-NH composite has a loading of 2 wt%. Adsorption of subphthalocyanine does not deteriorate host crystallinity, but decreases the surface area and porosity of MIL-101(Cr)-NH. The resulting SubPc@MIL-101(Cr)-NH composite exhibits a 575 nm absorption band responsible for the observed photoredox catalytic activity under simulated sunlight irradiation for hydrogenative dehalogenation of α-haloacetophenones and for the coupling of α-bromoacetophenone and styrene. The material undergoes a slight deactivation upon reuse. In comparison to the case of phthalocyanines the present study is one of the few cases showing the use of subphthalocyanine as a photoredox catalyst, with its activity derived from site isolation within the MOF cavities.

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Source
http://dx.doi.org/10.1039/c9dt04004hDOI Listing

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