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Multiple Use of Soluble Metallodendritic Materials as Catalysts and Dyes
Author(s) -
Albrecht Martin,
Hovestad Neldes J.,
Boersma Jaap,
van Koten Gerard
Publication year - 2001
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20010316)7:6<1289::aid-chem1289>3.0.co;2-6
Subject(s) - nanofiltration , dendrimer , homogeneous , catalysis , membrane , chemical engineering , materials science , chemistry , polymer chemistry , organic chemistry , physics , engineering , thermodynamics , biochemistry
Different sizes of core‐functionalized metallodendritic wedges were prepared by anchoring sensor‐active arylplatinum( II ) sites at the focal point of Fréchet‐type polyether dendritic wedges of various generations. The strong color of these metallodendrimers in the presence of SO 2 was used to assess the permeability of nanofiltration membranes (molecular weight cut‐off of 400 dalton) at ambient pressure. A primary result of these studies is that dendrimers do not have to be exceptionally large for successful retention. Hence, nanofiltration, membrane‐capped, immersion vials were developed, which operate as sensor devices when loaded with metallodendrimers with good retention properties. Appropriate substitution of the dye site at the focal point of these metallodendritic wedges by a catalytically active group afforded dendritic catalysts that exhibit essentially the same physical properties (shape, retention) as the corresponding dye‐functionalized dendritic wedges. When this homogeneous catalyst is compartmentalized in membrane‐capped vials, a unique and convenient method for its retrieval from product solutions is available. Moreover, such immobilized metallodendritic catalysts can be regenerated and stored for months without losing their activity; this provides access for the development of novel sustainable homogeneous catalysts.