Premium
One–step Synthesizable Lindqvist−isopolyoxometalates as Promising New Catalysts for Selective Conversion of Glucose as a Model Substrate for Lignocellulosic Biomass to Formic Acid
Author(s) -
Albert Jakob,
Mehler Julian,
Tucher Johannes,
Kastner Katharina,
Streb Carsten
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600797
Subject(s) - catalysis , formic acid , lignocellulosic biomass , aqueous solution , substrate (aquarium) , chemistry , vanadium , reactivity (psychology) , selectivity , organic chemistry , chemical engineering , materials science , cellulose , medicine , oceanography , alternative medicine , pathology , engineering , geology
A series of Lindqvist‐isopolyoxometalates [M 6 O 19 ] n− (M=W, V) were synthesized under one‐pot conditions and were applied in the homogeneous oxidation of glucose as a model substrate for lignocellulosic biomass to formic acid (FA), which offers a new field for application of isopolyoxometalates (IPA) in catalysis. Their low molecular weight and facile accessibility in aqueous solution together with their tuneable redox properties offers a new and straightforward path for optimized precious metal free oxidation catalysts. We have systematically synthesized and characterized a series of vanadium‐ and tungsten‐based Lindqvist structures and verified their applicability in the selective oxidation of glucose to FA. Maximum FA‐yields of 39 % in aqueous solution under non‐optimized conditions were observed for Cs 4 [V 2 W 4 O 19 ] and it is shown that reactivity and selectivity can be tuned by metal substitution of the cluster: FA formation is favoured with increasing V‐substitution of the [W 6 O 19 ] 2− ‐framework. Moreover, the influence of different inorganic counter cations was investigated.