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Tuning Connectivity in Hybrid Organic-Inorganic Antimony Halides through Reactant Concentration Effects.
Jakob Blahusch1,2, Julia Rauh1,2, Petra Rovo2
1Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
Inorganic Chemistry
|July 11, 2026
Summary
Researchers synthesized novel hybrid organic-inorganic antimony halides by controlling reactant concentrations. This method allows for diverse antimony oxidation states and inorganic substructures, expanding the chemical space of these materials.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Crystallography
Background:
- Hybrid organic-inorganic (HOI) materials offer tunable properties.
- Antimony halides are a class of compounds with diverse structural possibilities.
Purpose of the Study:
- To synthesize and characterize new HOI antimony halides.
- To investigate the effect of reactant concentrations on antimony oxidation states and resulting structures.
- To explore the expansion of antimony halide chemical space.
Main Methods:
- Synthesis via varying concentrations of Sb2O3, CuCl2, and 1,4-diazabicyclo[2.2.2]octane (DABCO) in HCl.
- Characterization using single-crystal X-ray diffraction.
- Spectroscopic and computational methods.
- Solid-state NMR.
Main Results:
- Two new HOI antimony halides were synthesized: (DABCOH2)(SbVCl6)Cl and mixed-valent (DABCOH2)12(SbIII)14(SbV)2Cl79(H3O)3(H2O)33.
- Different concentrations yielded varying antimony oxidation states, leading to diverse inorganic substructures (isolated units, layers, 3D frameworks).
- A novel 3D framework topology and a chloride hydrate cluster were identified in compound 2.
Conclusions:
- Controlled reaction conditions systematically expand the chemical space of antimony halides.
- The synthesis offers a pathway to novel HOI materials with tunable structural diversity.
- Antimony oxidation states are critical in dictating the final inorganic substructure.
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