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SUMMARY:Triaryl Phosphine\, Arsine\, Stibine and Bismuthine Metal-Organic 
 Frameworks as Solid-State Ligands for Catalysis in Unique Reaction Environ
 ments  - Simon M. Humphrey - Department of Chemistry\, University of Texas
  at Austin
DTSTART:20251022T130000Z
DTEND:20251022T140000Z
UID:TALK239689@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:In this seminar\, I will present some new results from our ong
 oing investigations into the synthesis of\nmetal-organic frameworks as ‘
 solid-state ligands’ for the site-isolated coordination of low-valent me
 tal complexes of industrial relevance to large-scale petrochemical convers
 ions\, for electrochemistry\, and for\nchemical sensing of reactive gases 
 (e.g.\, NH3\, SO2). In recent years\, we have expanded our MOF-building 
 ‘toolkit’ from the use of triaryl(phosphine) (PR3) ligands to analogue
 s based on the heavier pnictogens\n(As\, Sb & Bi). Surprisingly to some\, 
 SbR3 and BiR3 ligands are directly amenable to MOF synthesis under\nstanda
 rd self-assembly conditions\, opening-up a broad array of new opportunitie
 s to study catalysis in the solid-state\, using structurally well-defined\
 , low-valent metal complexes. Further\, the MOF-based solid-state ligand a
 pproach offers opportunities to utilize donor atoms such as SbIII and BiII
 I in new ways that circumvent facile ligand de-coordination due to weak Le
 wis basicity (and often\, moderate Lewis acidity). Equally it allows for t
 he preparation of catalysis in uniquely geometrically strained environment
 s\, which could be considered as long-lived non-equilibrium states from a 
 molecular coordination. perspective. New examples featured in this present
 ation will include new MOFs functionalized with ReI\,OsI\, RhI\, IrI\, PtI
 I\, AgI and AuI.\n \nIn a second area of research interest\, a subset of p
 hosphine-based MOFs containing mixtures of LnIII ions act as colorimetric 
 chemical sensors\, capable of resolving H vs D to fractions of a percent s
 imply upon exposure to H2O/D2O/HOD mixtures. This MOF is presently under c
 orporate development and customer deployment as a easy-to-use\, field-depl
 oyable test-strip method for the displacement of legacy analytical techniq
 ues (e.g.\, NMR\, FT-IR)\, which are time-consuming and expensive for isot
 opic chemical analysis.
LOCATION:Dept of Chemistry\, Wolfson Lecture Theatre 
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